1 /*
2 * wpa_supplicant/hostapd / common helper functions, etc.
3 * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
4 *
5 * This software may be distributed under the terms of the BSD license.
6 * See README for more details.
7 */
8
9 #ifndef COMMON_H
10 #define COMMON_H
11
12 #include "os.h"
13 #include "byteswap.h"
14
15 #define CHANNEL_36 36
16 #define CHANNEL_40 40
17 #define CHANNEL_42 42
18 #define CHANNEL_44 44
19 #define CHANNEL_48 48
20 #define CHANNEL_50 50
21 #define CHANNEL_149 149
22 #define CHANNEL_153 153
23 #define CHANNEL_155 155
24 #define CHANNEL_157 157
25 #define CHANNEL_161 161
26
27 #if defined(__linux__) || defined(__GLIBC__)
28 #include <endian.h>
29 #include <byteswap.h>
30 #endif /* __linux__ */
31
32 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
33 defined(__OpenBSD__)
34 #include <sys/types.h>
35 #include <sys/endian.h>
36 #define __BYTE_ORDER _BYTE_ORDER
37 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
38 #define __BIG_ENDIAN _BIG_ENDIAN
39 #ifdef __OpenBSD__
40 #define bswap_16 swap16
41 #define bswap_32 swap32
42 #define bswap_64 swap64
43 #else /* __OpenBSD__ */
44 #define bswap_16 bswap16
45 #define bswap_32 bswap32
46 #define bswap_64 bswap64
47 #endif /* __OpenBSD__ */
48 #endif /* defined(__FreeBSD__) || defined(__NetBSD__) ||
49 * defined(__DragonFly__) || defined(__OpenBSD__) */
50
51 #ifdef __APPLE__
52 #include <sys/types.h>
53 #include <machine/endian.h>
54 #define __BYTE_ORDER _BYTE_ORDER
55 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
56 #define __BIG_ENDIAN _BIG_ENDIAN
bswap_16(unsigned short v)57 static inline unsigned short bswap_16(unsigned short v)
58 {
59 return ((v & 0xff) << 8) | (v >> 8);
60 }
61
bswap_32(unsigned int v)62 static inline unsigned int bswap_32(unsigned int v)
63 {
64 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
65 ((v & 0xff0000) >> 8) | (v >> 24);
66 }
67 #endif /* __APPLE__ */
68
69 #ifdef __rtems__
70 #include <rtems/endian.h>
71 #define __BYTE_ORDER BYTE_ORDER
72 #define __LITTLE_ENDIAN LITTLE_ENDIAN
73 #define __BIG_ENDIAN BIG_ENDIAN
74 #define bswap_16 CPU_swap_u16
75 #define bswap_32 CPU_swap_u32
76 #endif /* __rtems__ */
77
78 #ifdef CONFIG_NATIVE_WINDOWS
79 #include <winsock.h>
80
81 typedef int socklen_t;
82
83 #ifndef MSG_DONTWAIT
84 #define MSG_DONTWAIT 0 /* not supported */
85 #endif
86
87 #endif /* CONFIG_NATIVE_WINDOWS */
88
89 #ifdef _MSC_VER
90 #define inline __inline
91
92 #undef vsnprintf
93 #define vsnprintf _vsnprintf
94 #undef close
95 #define close closesocket
96 #endif /* _MSC_VER */
97
98
99 /* Define platform specific integer types */
100
101 #ifdef _MSC_VER
102 typedef UINT64 u64;
103 typedef UINT32 u32;
104 typedef UINT16 u16;
105 typedef UINT8 u8;
106 typedef INT64 s64;
107 typedef INT32 s32;
108 typedef INT16 s16;
109 typedef INT8 s8;
110 #define WPA_TYPES_DEFINED
111 #endif /* _MSC_VER */
112
113 #ifdef __vxworks
114 typedef unsigned long long u64;
115 typedef UINT32 u32;
116 typedef UINT16 u16;
117 typedef UINT8 u8;
118 typedef long long s64;
119 typedef INT32 s32;
120 typedef INT16 s16;
121 typedef INT8 s8;
122 #define WPA_TYPES_DEFINED
123 #endif /* __vxworks */
124
125 #ifndef WPA_TYPES_DEFINED
126 #ifdef CONFIG_USE_INTTYPES_H
127 #include <inttypes.h>
128 #else
129 #include <stdint.h>
130 #endif
131 typedef uint64_t u64;
132 typedef uint32_t u32;
133 typedef uint16_t u16;
134 typedef uint8_t u8;
135 typedef int64_t s64;
136 typedef int32_t s32;
137 typedef int16_t s16;
138 typedef int8_t s8;
139 #define WPA_TYPES_DEFINED
140 #endif /* !WPA_TYPES_DEFINED */
141
142
143 /* Define platform specific byte swapping macros */
144
145 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
146
wpa_swap_16(unsigned short v)147 static inline unsigned short wpa_swap_16(unsigned short v)
148 {
149 return ((v & 0xff) << 8) | (v >> 8);
150 }
151
wpa_swap_32(unsigned int v)152 static inline unsigned int wpa_swap_32(unsigned int v)
153 {
154 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
155 ((v & 0xff0000) >> 8) | (v >> 24);
156 }
157
158 #define le_to_host16(n) (n)
159 #define host_to_le16(n) (n)
160 #define be_to_host16(n) wpa_swap_16(n)
161 #define host_to_be16(n) wpa_swap_16(n)
162 #define le_to_host32(n) (n)
163 #define host_to_le32(n) (n)
164 #define be_to_host32(n) wpa_swap_32(n)
165 #define host_to_be32(n) wpa_swap_32(n)
166 #define host_to_le64(n) (n)
167
168 #define WPA_BYTE_SWAP_DEFINED
169
170 #endif /* __CYGWIN__ || CONFIG_NATIVE_WINDOWS */
171
172
173 #ifndef WPA_BYTE_SWAP_DEFINED
174
175 #ifndef __BYTE_ORDER
176 #ifndef __LITTLE_ENDIAN
177 #ifndef __BIG_ENDIAN
178 #define __LITTLE_ENDIAN 1234
179 #define __BIG_ENDIAN 4321
180 #if defined(sparc)
181 #define __BYTE_ORDER __BIG_ENDIAN
182 #endif
183 #endif /* __BIG_ENDIAN */
184 #endif /* __LITTLE_ENDIAN */
185 #endif /* __BYTE_ORDER */
186
187 #if __BYTE_ORDER == __LITTLE_ENDIAN
188 #define le_to_host16(n) ((__force u16) (le16) (n))
189 #define host_to_le16(n) ((__force le16) (u16) (n))
190 #define be_to_host16(n) bswap_16((__force u16) (be16) (n))
191 #define host_to_be16(n) ((__force be16) bswap_16((n)))
192 #define le_to_host32(n) ((__force u32) (le32) (n))
193 #define host_to_le32(n) ((__force le32) (u32) (n))
194 #define be_to_host32(n) bswap_32((__force u32) (be32) (n))
195 #define host_to_be32(n) ((__force be32) bswap_32((n)))
196 #define le_to_host64(n) ((__force u64) (le64) (n))
197 #define host_to_le64(n) ((__force le64) (u64) (n))
198 #define be_to_host64(n) bswap_64((__force u64) (be64) (n))
199 #define host_to_be64(n) ((__force be64) bswap_64((n)))
200 #elif __BYTE_ORDER == __BIG_ENDIAN
201 #define le_to_host16(n) bswap_16(n)
202 #define host_to_le16(n) bswap_16(n)
203 #define be_to_host16(n) (n)
204 #define host_to_be16(n) (n)
205 #define le_to_host32(n) bswap_32(n)
206 #define host_to_le32(n) bswap_32(n)
207 #define be_to_host32(n) (n)
208 #define host_to_be32(n) (n)
209 #define le_to_host64(n) bswap_64(n)
210 #define host_to_le64(n) bswap_64(n)
211 #define be_to_host64(n) (n)
212 #define host_to_be64(n) (n)
213 #ifndef WORDS_BIGENDIAN
214 #define WORDS_BIGENDIAN
215 #endif
216 #else
217 #error Could not determine CPU byte order
218 #endif
219
220 #define WPA_BYTE_SWAP_DEFINED
221 #endif /* !WPA_BYTE_SWAP_DEFINED */
222
223
224 /* Macros for handling unaligned memory accesses */
225
WPA_GET_BE16(const u8 * a)226 static inline u16 WPA_GET_BE16(const u8 *a)
227 {
228 return (a[0] << 8) | a[1];
229 }
230
WPA_PUT_BE16(u8 * a,u16 val)231 static inline void WPA_PUT_BE16(u8 *a, u16 val)
232 {
233 a[0] = val >> 8;
234 a[1] = val & 0xff;
235 }
236
WPA_GET_LE16(const u8 * a)237 static inline u16 WPA_GET_LE16(const u8 *a)
238 {
239 return (a[1] << 8) | a[0];
240 }
241
WPA_PUT_LE16(u8 * a,u16 val)242 static inline void WPA_PUT_LE16(u8 *a, u16 val)
243 {
244 a[1] = val >> 8;
245 a[0] = val & 0xff;
246 }
247
WPA_GET_BE24(const u8 * a)248 static inline u32 WPA_GET_BE24(const u8 *a)
249 {
250 return (a[0] << 16) | (a[1] << 8) | a[2];
251 }
252
WPA_PUT_BE24(u8 * a,u32 val)253 static inline void WPA_PUT_BE24(u8 *a, u32 val)
254 {
255 a[0] = (val >> 16) & 0xff;
256 a[1] = (val >> 8) & 0xff;
257 a[2] = val & 0xff;
258 }
259
WPA_GET_BE32(const u8 * a)260 static inline u32 WPA_GET_BE32(const u8 *a)
261 {
262 return ((u32) a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3];
263 }
264
WPA_PUT_BE32(u8 * a,u32 val)265 static inline void WPA_PUT_BE32(u8 *a, u32 val)
266 {
267 a[0] = (val >> 24) & 0xff;
268 a[1] = (val >> 16) & 0xff;
269 a[2] = (val >> 8) & 0xff;
270 a[3] = val & 0xff;
271 }
272
WPA_GET_LE32(const u8 * a)273 static inline u32 WPA_GET_LE32(const u8 *a)
274 {
275 return ((u32) a[3] << 24) | (a[2] << 16) | (a[1] << 8) | a[0];
276 }
277
WPA_PUT_LE32(u8 * a,u32 val)278 static inline void WPA_PUT_LE32(u8 *a, u32 val)
279 {
280 a[3] = (val >> 24) & 0xff;
281 a[2] = (val >> 16) & 0xff;
282 a[1] = (val >> 8) & 0xff;
283 a[0] = val & 0xff;
284 }
285
WPA_GET_BE64(const u8 * a)286 static inline u64 WPA_GET_BE64(const u8 *a)
287 {
288 return (((u64) a[0]) << 56) | (((u64) a[1]) << 48) |
289 (((u64) a[2]) << 40) | (((u64) a[3]) << 32) |
290 (((u64) a[4]) << 24) | (((u64) a[5]) << 16) |
291 (((u64) a[6]) << 8) | ((u64) a[7]);
292 }
293
WPA_PUT_BE64(u8 * a,u64 val)294 static inline void WPA_PUT_BE64(u8 *a, u64 val)
295 {
296 a[0] = val >> 56;
297 a[1] = val >> 48;
298 a[2] = val >> 40;
299 a[3] = val >> 32;
300 a[4] = val >> 24;
301 a[5] = val >> 16;
302 a[6] = val >> 8;
303 a[7] = val & 0xff;
304 }
305
WPA_GET_LE64(const u8 * a)306 static inline u64 WPA_GET_LE64(const u8 *a)
307 {
308 return (((u64) a[7]) << 56) | (((u64) a[6]) << 48) |
309 (((u64) a[5]) << 40) | (((u64) a[4]) << 32) |
310 (((u64) a[3]) << 24) | (((u64) a[2]) << 16) |
311 (((u64) a[1]) << 8) | ((u64) a[0]);
312 }
313
WPA_PUT_LE64(u8 * a,u64 val)314 static inline void WPA_PUT_LE64(u8 *a, u64 val)
315 {
316 a[7] = val >> 56;
317 a[6] = val >> 48;
318 a[5] = val >> 40;
319 a[4] = val >> 32;
320 a[3] = val >> 24;
321 a[2] = val >> 16;
322 a[1] = val >> 8;
323 a[0] = val & 0xff;
324 }
325
326
327 #ifndef ETH_ALEN
328 #define ETH_ALEN 6
329 #endif
330 #ifndef ETH_HLEN
331 #define ETH_HLEN 14
332 #endif
333 #ifndef IFNAMSIZ
334 #define IFNAMSIZ 16
335 #endif
336 #ifndef ETH_P_ALL
337 #define ETH_P_ALL 0x0003
338 #endif
339 #ifndef ETH_P_IP
340 #define ETH_P_IP 0x0800
341 #endif
342 #ifndef ETH_P_80211_ENCAP
343 #define ETH_P_80211_ENCAP 0x890d /* TDLS comes under this category */
344 #endif
345 #ifndef ETH_P_PAE
346 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
347 #endif /* ETH_P_PAE */
348 #ifndef ETH_P_EAPOL
349 #define ETH_P_EAPOL ETH_P_PAE
350 #endif /* ETH_P_EAPOL */
351 #ifndef ETH_P_RSN_PREAUTH
352 #define ETH_P_RSN_PREAUTH 0x88c7
353 #endif /* ETH_P_RSN_PREAUTH */
354 #ifndef ETH_P_RRB
355 #define ETH_P_RRB 0x890D
356 #endif /* ETH_P_RRB */
357 #ifndef ETH_P_OUI
358 #define ETH_P_OUI 0x88B7
359 #endif /* ETH_P_OUI */
360 #ifndef ETH_P_8021Q
361 #define ETH_P_8021Q 0x8100
362 #endif /* ETH_P_8021Q */
363
364
365 #ifdef __GNUC__
366 #define PRINTF_FORMAT(a,b) __attribute__ ((format (printf, (a), (b))))
367 #define STRUCT_PACKED __attribute__ ((packed))
368 #else
369 #define PRINTF_FORMAT(a,b)
370 #define STRUCT_PACKED
371 #endif
372
373
374 #ifdef CONFIG_ANSI_C_EXTRA
375
376 #if !defined(_MSC_VER) || _MSC_VER < 1400
377 /* snprintf - used in number of places; sprintf() is _not_ a good replacement
378 * due to possible buffer overflow; see, e.g.,
379 * http://www.ijs.si/software/snprintf/ for portable implementation of
380 * snprintf. */
381 int snprintf(char *str, size_t size, const char *format, ...);
382
383 /* vsnprintf - only used for wpa_msg() in wpa_supplicant.c */
384 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
385 #endif /* !defined(_MSC_VER) || _MSC_VER < 1400 */
386
387 /* getopt - only used in main.c */
388 int getopt(int argc, char *const argv[], const char *optstring);
389 extern char *optarg;
390 extern int optind;
391
392 #ifndef CONFIG_NO_SOCKLEN_T_TYPEDEF
393 #ifndef __socklen_t_defined
394 typedef int socklen_t;
395 #endif
396 #endif
397
398 /* inline - define as __inline or just define it to be empty, if needed */
399 #ifdef CONFIG_NO_INLINE
400 #define inline
401 #else
402 #define inline __inline
403 #endif
404
405 #ifndef __func__
406 #define __func__ "__func__ not defined"
407 #endif
408
409 #ifndef bswap_16
410 #define bswap_16(a) ((((u16) (a) << 8) & 0xff00) | (((u16) (a) >> 8) & 0xff))
411 #endif
412
413 #ifndef bswap_32
414 #define bswap_32(a) ((((u32) (a) << 24) & 0xff000000) | \
415 (((u32) (a) << 8) & 0xff0000) | \
416 (((u32) (a) >> 8) & 0xff00) | \
417 (((u32) (a) >> 24) & 0xff))
418 #endif
419
420 #ifndef MSG_DONTWAIT
421 #define MSG_DONTWAIT 0
422 #endif
423
424 #ifdef _WIN32_WCE
425 void perror(const char *s);
426 #endif /* _WIN32_WCE */
427
428 #endif /* CONFIG_ANSI_C_EXTRA */
429
430 #ifndef MAC2STR
431 #define MAC2STR_SEC(a) mac_to_str(a)
432 #define MACSTR_SEC "%s"
433
434 #define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
435 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
436
437 /*
438 * Compact form for string representation of MAC address
439 * To be used, e.g., for constructing dbus paths for P2P Devices
440 */
441 #define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x"
442 #endif
443
444 #define MAC2DBGSTR(a) (a)[0], (wpa_debug_level < MSG_INFO) ? (a)[1] : 0x0, \
445 (wpa_debug_level < MSG_INFO) ? (a)[2] : 0x0, (wpa_debug_level < MSG_INFO) ? (a)[3] : 0x0, \
446 (wpa_debug_level < MSG_INFO) ? (a)[4] : 0x0, (a)[5]
447
448 #ifndef BIT
449 #define BIT(x) (1U << (x))
450 #endif
451
452 /*
453 * Definitions for sparse validation
454 * (http://kernel.org/pub/linux/kernel/people/josh/sparse/)
455 */
456 #ifdef __CHECKER__
457 #define __force __attribute__((force))
458 #undef __bitwise
459 #define __bitwise __attribute__((bitwise))
460 #else
461 #define __force
462 #undef __bitwise
463 #define __bitwise
464 #endif
465
466 typedef u16 __bitwise be16;
467 typedef u16 __bitwise le16;
468 typedef u32 __bitwise be32;
469 typedef u32 __bitwise le32;
470 typedef u64 __bitwise be64;
471 typedef u64 __bitwise le64;
472
473 #ifndef __must_check
474 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
475 #define __must_check __attribute__((__warn_unused_result__))
476 #else
477 #define __must_check
478 #endif /* __GNUC__ */
479 #endif /* __must_check */
480
481 #ifndef __maybe_unused
482 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
483 #define __maybe_unused __attribute__((unused))
484 #else
485 #define __maybe_unused
486 #endif /* __GNUC__ */
487 #endif /* __must_check */
488
489 #define SSID_MAX_LEN 32
490
491 struct wpa_ssid_value {
492 u8 ssid[SSID_MAX_LEN];
493 size_t ssid_len;
494 };
495
496 int hwaddr_aton(const char *txt, u8 *addr);
497 int hwaddr_masked_aton(const char *txt, u8 *addr, u8 *mask, u8 maskable);
498 int hwaddr_compact_aton(const char *txt, u8 *addr);
499 int hwaddr_aton2(const char *txt, u8 *addr);
500 int hex2byte(const char *hex);
501 int hexstr2bin(const char *hex, u8 *buf, size_t len);
502 #ifdef CONFIG_EAP_AUTH
503 void bin2hexstr(const unsigned char* bin, size_t bin_len, char* hexstr, size_t hexstr_len);
504 #endif
505 void inc_byte_array(u8 *counter, size_t len);
506 void buf_shift_right(u8 *buf, size_t len, size_t bits);
507 void wpa_get_ntp_timestamp(u8 *buf);
508 int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
509 PRINTF_FORMAT(3, 4);
510 int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
511 char sep);
512 int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
513 int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
514 size_t len);
515
516 int hwaddr_mask_txt(char *buf, size_t len, const u8 *addr, const u8 *mask);
517 int ssid_parse(const char *buf, struct wpa_ssid_value *ssid);
518
519 #ifdef CONFIG_NATIVE_WINDOWS
520 void wpa_unicode2ascii_inplace(TCHAR *str);
521 TCHAR * wpa_strdup_tchar(const char *str);
522 #else /* CONFIG_NATIVE_WINDOWS */
523 #define wpa_unicode2ascii_inplace(s) do { } while (0)
524 #define wpa_strdup_tchar(s) strdup((s))
525 #endif /* CONFIG_NATIVE_WINDOWS */
526
527 void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len);
528 size_t printf_decode(u8 *buf, size_t maxlen, const char *str);
529
530 const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
531
532 char * wpa_config_parse_string(const char *value, size_t *len);
533 int is_hex(const u8 *data, size_t len);
534 int has_ctrl_char(const u8 *data, size_t len);
535 int has_newline(const char *str);
536 size_t merge_byte_arrays(u8 *res, size_t res_len,
537 const u8 *src1, size_t src1_len,
538 const u8 *src2, size_t src2_len);
539 char * dup_binstr(const void *src, size_t len);
540
is_zero_ether_addr(const u8 * a)541 static inline int is_zero_ether_addr(const u8 *a)
542 {
543 return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]);
544 }
545
is_broadcast_ether_addr(const u8 * a)546 static inline int is_broadcast_ether_addr(const u8 *a)
547 {
548 return (a[0] & a[1] & a[2] & a[3] & a[4] & a[5]) == 0xff;
549 }
550
is_multicast_ether_addr(const u8 * a)551 static inline int is_multicast_ether_addr(const u8 *a)
552 {
553 return a[0] & 0x01;
554 }
555
556 #define broadcast_ether_addr (const u8 *) "\xff\xff\xff\xff\xff\xff"
557
558 #include "wpa_debug.h"
559
560
561 struct wpa_freq_range_list {
562 struct wpa_freq_range {
563 unsigned int min;
564 unsigned int max;
565 } *range;
566 unsigned int num;
567 };
568
569 int freq_range_list_parse(struct wpa_freq_range_list *res, const char *value);
570 int freq_range_list_includes(const struct wpa_freq_range_list *list,
571 unsigned int freq);
572 char * freq_range_list_str(const struct wpa_freq_range_list *list);
573
574 size_t int_array_len(const int *a);
575 void int_array_concat(int **res, const int *a);
576 void int_array_sort_unique(int *a);
577 void int_array_add_unique(int **res, int a);
578
579 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
580
581 void str_clear_free(char *str);
582 void bin_clear_free(void *bin, size_t len);
583
584 int random_mac_addr(u8 *addr);
585 int random_mac_addr_keep_oui(u8 *addr);
586
587 const char * cstr_token(const char *str, const char *delim, const char **last);
588 char * str_token(char *str, const char *delim, char **context);
589 size_t utf8_escape(const char *inp, size_t in_size,
590 char *outp, size_t out_size);
591 size_t utf8_unescape(const char *inp, size_t in_size,
592 char *outp, size_t out_size);
593 int is_ctrl_char(char c);
594
595 int str_starts(const char *str, const char *start);
596
597 u8 rssi_to_rcpi(int rssi);
598 char * get_param(const char *cmd, const char *param);
599 #ifdef CONFIG_MLD_PATCH
600 #define for_each_link(__links, __i) \
601 for ((__i) = 0; (__i) < MAX_NUM_MLD_LINKS; (__i)++) \
602 if ((__links) & BIT(__i))
603
604 /* Iterate all links, or, if no link is defined, iterate given index */
605 #define for_each_link_default(_links, _i, _def_idx) \
606 for ((_i) = (_links) ? 0 : (_def_idx); \
607 (_i) < MAX_NUM_MLD_LINKS || \
608 (!(_links) && (_i) == (_def_idx)); \
609 (_i)++) \
610 if (!(_links) || (_links) & BIT(_i))
611 #endif
612 void forced_memzero(void *ptr, size_t len);
613
614 const char *mac_to_str(const u8 *addr);
615
616 /*
617 * gcc 4.4 ends up generating strict-aliasing warnings about some very common
618 * networking socket uses that do not really result in a real problem and
619 * cannot be easily avoided with union-based type-punning due to struct
620 * definitions including another struct in system header files. To avoid having
621 * to fully disable strict-aliasing warnings, provide a mechanism to hide the
622 * typecast from aliasing for now. A cleaner solution will hopefully be found
623 * in the future to handle these cases.
624 */
625 void * __hide_aliasing_typecast(void *foo);
626 #define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a))
627
628 #ifdef CONFIG_VALGRIND
629 #include <valgrind/memcheck.h>
630 #define WPA_MEM_DEFINED(ptr, len) VALGRIND_MAKE_MEM_DEFINED((ptr), (len))
631 #else /* CONFIG_VALGRIND */
632 #define WPA_MEM_DEFINED(ptr, len) do { } while (0)
633 #endif /* CONFIG_VALGRIND */
634
635 #endif /* COMMON_H */
636