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
14 #if defined(__linux__) || defined(__GLIBC__)
15 #include <endian.h>
16 #include <byteswap.h>
17 #endif /* __linux__ */
18
19 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
20 defined(__OpenBSD__)
21 #include <sys/types.h>
22 #include <sys/endian.h>
23 #define __BYTE_ORDER _BYTE_ORDER
24 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
25 #define __BIG_ENDIAN _BIG_ENDIAN
26 #ifdef __OpenBSD__
27 #define bswap_16 swap16
28 #define bswap_32 swap32
29 #define bswap_64 swap64
30 #else /* __OpenBSD__ */
31 #define bswap_16 bswap16
32 #define bswap_32 bswap32
33 #define bswap_64 bswap64
34 #endif /* __OpenBSD__ */
35 #endif /* defined(__FreeBSD__) || defined(__NetBSD__) ||
36 * defined(__DragonFly__) || defined(__OpenBSD__) */
37
38 #ifdef __APPLE__
39 #include <sys/types.h>
40 #include <machine/endian.h>
41 #define __BYTE_ORDER _BYTE_ORDER
42 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
43 #define __BIG_ENDIAN _BIG_ENDIAN
bswap_16(unsigned short v)44 static inline unsigned short bswap_16(unsigned short v)
45 {
46 return ((v & 0xff) << 8) | (v >> 8);
47 }
48
bswap_32(unsigned int v)49 static inline unsigned int bswap_32(unsigned int v)
50 {
51 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
52 ((v & 0xff0000) >> 8) | (v >> 24);
53 }
54 #endif /* __APPLE__ */
55
56 #ifdef __rtems__
57 #include <rtems/endian.h>
58 #define __BYTE_ORDER BYTE_ORDER
59 #define __LITTLE_ENDIAN LITTLE_ENDIAN
60 #define __BIG_ENDIAN BIG_ENDIAN
61 #define bswap_16 CPU_swap_u16
62 #define bswap_32 CPU_swap_u32
63 #endif /* __rtems__ */
64
65 #ifdef CONFIG_NATIVE_WINDOWS
66 #include <winsock.h>
67
68 typedef int socklen_t;
69
70 #ifndef MSG_DONTWAIT
71 #define MSG_DONTWAIT 0 /* not supported */
72 #endif
73
74 #endif /* CONFIG_NATIVE_WINDOWS */
75
76 #ifdef _MSC_VER
77 #define inline __inline
78
79 #undef vsnprintf
80 #define vsnprintf _vsnprintf
81 #undef close
82 #define close closesocket
83 #endif /* _MSC_VER */
84
85
86 /* Define platform specific integer types */
87
88 #ifdef _MSC_VER
89 typedef UINT64 u64;
90 typedef UINT32 u32;
91 typedef UINT16 u16;
92 typedef UINT8 u8;
93 typedef INT64 s64;
94 typedef INT32 s32;
95 typedef INT16 s16;
96 typedef INT8 s8;
97 #define WPA_TYPES_DEFINED
98 #endif /* _MSC_VER */
99
100 #ifdef __vxworks
101 typedef unsigned long long u64;
102 typedef UINT32 u32;
103 typedef UINT16 u16;
104 typedef UINT8 u8;
105 typedef long long s64;
106 typedef INT32 s32;
107 typedef INT16 s16;
108 typedef INT8 s8;
109 #define WPA_TYPES_DEFINED
110 #endif /* __vxworks */
111
112 #ifndef WPA_TYPES_DEFINED
113 #ifdef CONFIG_USE_INTTYPES_H
114 #include <inttypes.h>
115 #else
116 #include <stdint.h>
117 #endif
118 typedef uint64_t u64;
119 typedef uint32_t u32;
120 typedef uint16_t u16;
121 typedef uint8_t u8;
122 typedef int64_t s64;
123 typedef int32_t s32;
124 typedef int16_t s16;
125 typedef int8_t s8;
126 #define WPA_TYPES_DEFINED
127 #endif /* !WPA_TYPES_DEFINED */
128
129
130 /* Define platform specific byte swapping macros */
131
132 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
133
wpa_swap_16(unsigned short v)134 static inline unsigned short wpa_swap_16(unsigned short v)
135 {
136 return ((v & 0xff) << 8) | (v >> 8);
137 }
138
wpa_swap_32(unsigned int v)139 static inline unsigned int wpa_swap_32(unsigned int v)
140 {
141 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
142 ((v & 0xff0000) >> 8) | (v >> 24);
143 }
144
145 #define le_to_host16(n) (n)
146 #define host_to_le16(n) (n)
147 #define be_to_host16(n) wpa_swap_16(n)
148 #define host_to_be16(n) wpa_swap_16(n)
149 #define le_to_host32(n) (n)
150 #define host_to_le32(n) (n)
151 #define be_to_host32(n) wpa_swap_32(n)
152 #define host_to_be32(n) wpa_swap_32(n)
153 #define host_to_le64(n) (n)
154
155 #define WPA_BYTE_SWAP_DEFINED
156
157 #endif /* __CYGWIN__ || CONFIG_NATIVE_WINDOWS */
158
159
160 #ifndef WPA_BYTE_SWAP_DEFINED
161
162 #ifndef __BYTE_ORDER
163 #ifndef __LITTLE_ENDIAN
164 #ifndef __BIG_ENDIAN
165 #define __LITTLE_ENDIAN 1234
166 #define __BIG_ENDIAN 4321
167 #if defined(sparc)
168 #define __BYTE_ORDER __BIG_ENDIAN
169 #endif
170 #endif /* __BIG_ENDIAN */
171 #endif /* __LITTLE_ENDIAN */
172 #endif /* __BYTE_ORDER */
173
174 #if __BYTE_ORDER == __LITTLE_ENDIAN
175 #define le_to_host16(n) ((__force u16) (le16) (n))
176 #define host_to_le16(n) ((__force le16) (u16) (n))
177 #define be_to_host16(n) bswap_16((__force u16) (be16) (n))
178 #define host_to_be16(n) ((__force be16) bswap_16((n)))
179 #define le_to_host32(n) ((__force u32) (le32) (n))
180 #define host_to_le32(n) ((__force le32) (u32) (n))
181 #define be_to_host32(n) bswap_32((__force u32) (be32) (n))
182 #define host_to_be32(n) ((__force be32) bswap_32((n)))
183 #define le_to_host64(n) ((__force u64) (le64) (n))
184 #define host_to_le64(n) ((__force le64) (u64) (n))
185 #define be_to_host64(n) bswap_64((__force u64) (be64) (n))
186 #define host_to_be64(n) ((__force be64) bswap_64((n)))
187 #elif __BYTE_ORDER == __BIG_ENDIAN
188 #define le_to_host16(n) bswap_16(n)
189 #define host_to_le16(n) bswap_16(n)
190 #define be_to_host16(n) (n)
191 #define host_to_be16(n) (n)
192 #define le_to_host32(n) bswap_32(n)
193 #define host_to_le32(n) bswap_32(n)
194 #define be_to_host32(n) (n)
195 #define host_to_be32(n) (n)
196 #define le_to_host64(n) bswap_64(n)
197 #define host_to_le64(n) bswap_64(n)
198 #define be_to_host64(n) (n)
199 #define host_to_be64(n) (n)
200 #ifndef WORDS_BIGENDIAN
201 #define WORDS_BIGENDIAN
202 #endif
203 #else
204 #error Could not determine CPU byte order
205 #endif
206
207 #define WPA_BYTE_SWAP_DEFINED
208 #endif /* !WPA_BYTE_SWAP_DEFINED */
209
210
211 /* Macros for handling unaligned memory accesses */
212
WPA_GET_BE16(const u8 * a)213 static inline u16 WPA_GET_BE16(const u8 *a)
214 {
215 return (a[0] << 8) | a[1];
216 }
217
WPA_PUT_BE16(u8 * a,u16 val)218 static inline void WPA_PUT_BE16(u8 *a, u16 val)
219 {
220 a[0] = val >> 8;
221 a[1] = val & 0xff;
222 }
223
WPA_GET_LE16(const u8 * a)224 static inline u16 WPA_GET_LE16(const u8 *a)
225 {
226 return (a[1] << 8) | a[0];
227 }
228
WPA_PUT_LE16(u8 * a,u16 val)229 static inline void WPA_PUT_LE16(u8 *a, u16 val)
230 {
231 a[1] = val >> 8;
232 a[0] = val & 0xff;
233 }
234
WPA_GET_BE24(const u8 * a)235 static inline u32 WPA_GET_BE24(const u8 *a)
236 {
237 return (a[0] << 16) | (a[1] << 8) | a[2];
238 }
239
WPA_PUT_BE24(u8 * a,u32 val)240 static inline void WPA_PUT_BE24(u8 *a, u32 val)
241 {
242 a[0] = (val >> 16) & 0xff;
243 a[1] = (val >> 8) & 0xff;
244 a[2] = val & 0xff;
245 }
246
WPA_GET_LE24(const u8 * a)247 static inline u32 WPA_GET_LE24(const u8 *a)
248 {
249 return (a[2] << 16) | (a[1] << 8) | a[0];
250 }
251
WPA_PUT_LE24(u8 * a,u32 val)252 static inline void WPA_PUT_LE24(u8 *a, u32 val)
253 {
254 a[2] = (val >> 16) & 0xff;
255 a[1] = (val >> 8) & 0xff;
256 a[0] = val & 0xff;
257 }
258
WPA_GET_BE32(const u8 * a)259 static inline u32 WPA_GET_BE32(const u8 *a)
260 {
261 return ((u32) a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3];
262 }
263
WPA_PUT_BE32(u8 * a,u32 val)264 static inline void WPA_PUT_BE32(u8 *a, u32 val)
265 {
266 a[0] = (val >> 24) & 0xff;
267 a[1] = (val >> 16) & 0xff;
268 a[2] = (val >> 8) & 0xff;
269 a[3] = val & 0xff;
270 }
271
WPA_GET_LE32(const u8 * a)272 static inline u32 WPA_GET_LE32(const u8 *a)
273 {
274 return ((u32) a[3] << 24) | (a[2] << 16) | (a[1] << 8) | a[0];
275 }
276
WPA_PUT_LE32(u8 * a,u32 val)277 static inline void WPA_PUT_LE32(u8 *a, u32 val)
278 {
279 a[3] = (val >> 24) & 0xff;
280 a[2] = (val >> 16) & 0xff;
281 a[1] = (val >> 8) & 0xff;
282 a[0] = val & 0xff;
283 }
284
WPA_GET_BE64(const u8 * a)285 static inline u64 WPA_GET_BE64(const u8 *a)
286 {
287 return (((u64) a[0]) << 56) | (((u64) a[1]) << 48) |
288 (((u64) a[2]) << 40) | (((u64) a[3]) << 32) |
289 (((u64) a[4]) << 24) | (((u64) a[5]) << 16) |
290 (((u64) a[6]) << 8) | ((u64) a[7]);
291 }
292
WPA_PUT_BE64(u8 * a,u64 val)293 static inline void WPA_PUT_BE64(u8 *a, u64 val)
294 {
295 a[0] = val >> 56;
296 a[1] = val >> 48;
297 a[2] = val >> 40;
298 a[3] = val >> 32;
299 a[4] = val >> 24;
300 a[5] = val >> 16;
301 a[6] = val >> 8;
302 a[7] = val & 0xff;
303 }
304
WPA_GET_LE64(const u8 * a)305 static inline u64 WPA_GET_LE64(const u8 *a)
306 {
307 return (((u64) a[7]) << 56) | (((u64) a[6]) << 48) |
308 (((u64) a[5]) << 40) | (((u64) a[4]) << 32) |
309 (((u64) a[3]) << 24) | (((u64) a[2]) << 16) |
310 (((u64) a[1]) << 8) | ((u64) a[0]);
311 }
312
WPA_PUT_LE64(u8 * a,u64 val)313 static inline void WPA_PUT_LE64(u8 *a, u64 val)
314 {
315 a[7] = val >> 56;
316 a[6] = val >> 48;
317 a[5] = val >> 40;
318 a[4] = val >> 32;
319 a[3] = val >> 24;
320 a[2] = val >> 16;
321 a[1] = val >> 8;
322 a[0] = val & 0xff;
323 }
324
325
326 #ifndef ETH_ALEN
327 #define ETH_ALEN 6
328 #endif
329 #ifndef ETH_HLEN
330 #define ETH_HLEN 14
331 #endif
332 #ifndef IFNAMSIZ
333 #define IFNAMSIZ 16
334 #endif
335 #ifndef ETH_P_ALL
336 #define ETH_P_ALL 0x0003
337 #endif
338 #ifndef ETH_P_IP
339 #define ETH_P_IP 0x0800
340 #endif
341 #ifndef ETH_P_80211_ENCAP
342 #define ETH_P_80211_ENCAP 0x890d /* TDLS comes under this category */
343 #endif
344 #ifndef ETH_P_PAE
345 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
346 #endif /* ETH_P_PAE */
347 #ifndef ETH_P_EAPOL
348 #define ETH_P_EAPOL ETH_P_PAE
349 #endif /* ETH_P_EAPOL */
350 #ifndef ETH_P_RSN_PREAUTH
351 #define ETH_P_RSN_PREAUTH 0x88c7
352 #endif /* ETH_P_RSN_PREAUTH */
353 #ifndef ETH_P_RRB
354 #define ETH_P_RRB 0x890D
355 #endif /* ETH_P_RRB */
356 #ifndef ETH_P_OUI
357 #define ETH_P_OUI 0x88B7
358 #endif /* ETH_P_OUI */
359 #ifndef ETH_P_8021Q
360 #define ETH_P_8021Q 0x8100
361 #endif /* ETH_P_8021Q */
362
363
364 #ifdef __GNUC__
365 #define PRINTF_FORMAT(a,b) __attribute__ ((format (printf, (a), (b))))
366 #define STRUCT_PACKED __attribute__ ((packed))
367 #else
368 #define PRINTF_FORMAT(a,b)
369 #define STRUCT_PACKED
370 #endif
371
372
373 #ifdef CONFIG_ANSI_C_EXTRA
374
375 #if !defined(_MSC_VER) || _MSC_VER < 1400
376 /* snprintf - used in number of places; sprintf() is _not_ a good replacement
377 * due to possible buffer overflow; see, e.g.,
378 * http://www.ijs.si/software/snprintf/ for portable implementation of
379 * snprintf. */
380 int snprintf(char *str, size_t size, const char *format, ...);
381
382 /* vsnprintf - only used for wpa_msg() in wpa_supplicant.c */
383 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
384 #endif /* !defined(_MSC_VER) || _MSC_VER < 1400 */
385
386 /* getopt - only used in main.c */
387 int getopt(int argc, char *const argv[], const char *optstring);
388 extern char *optarg;
389 extern int optind;
390
391 #ifndef CONFIG_NO_SOCKLEN_T_TYPEDEF
392 #ifndef __socklen_t_defined
393 typedef int socklen_t;
394 #endif
395 #endif
396
397 /* inline - define as __inline or just define it to be empty, if needed */
398 #ifdef CONFIG_NO_INLINE
399 #define inline
400 #else
401 #define inline __inline
402 #endif
403
404 #ifndef __func__
405 #define __func__ "__func__ not defined"
406 #endif
407
408 #ifndef bswap_16
409 #define bswap_16(a) ((((u16) (a) << 8) & 0xff00) | (((u16) (a) >> 8) & 0xff))
410 #endif
411
412 #ifndef bswap_32
413 #define bswap_32(a) ((((u32) (a) << 24) & 0xff000000) | \
414 (((u32) (a) << 8) & 0xff0000) | \
415 (((u32) (a) >> 8) & 0xff00) | \
416 (((u32) (a) >> 24) & 0xff))
417 #endif
418
419 #ifndef MSG_DONTWAIT
420 #define MSG_DONTWAIT 0
421 #endif
422
423 #ifdef _WIN32_WCE
424 void perror(const char *s);
425 #endif /* _WIN32_WCE */
426
427 #endif /* CONFIG_ANSI_C_EXTRA */
428
429 #ifndef MAC2STR
430 #define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
431 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
432
433 /*
434 * Compact form for string representation of MAC address
435 * To be used, e.g., for constructing dbus paths for P2P Devices
436 */
437 #define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x"
438 #endif
439
440 #ifndef BIT
441 #define BIT(x) (1U << (x))
442 #endif
443
444 #ifndef MIN
445 #define MIN(a, b) ((a) < (b) ? (a) : (b))
446 #endif
447 #ifndef MAX
448 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
449 #endif
450
451 /*
452 * Definitions for sparse validation
453 * (http://kernel.org/pub/linux/kernel/people/josh/sparse/)
454 */
455 #ifdef __CHECKER__
456 #define __force __attribute__((force))
457 #undef __bitwise
458 #define __bitwise __attribute__((bitwise))
459 #else
460 #define __force
461 #undef __bitwise
462 #define __bitwise
463 #endif
464
465 typedef u16 __bitwise be16;
466 typedef u16 __bitwise le16;
467 typedef u32 __bitwise be32;
468 typedef u32 __bitwise le32;
469 typedef u64 __bitwise be64;
470 typedef u64 __bitwise le64;
471
472 #ifndef __must_check
473 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
474 #define __must_check __attribute__((__warn_unused_result__))
475 #else
476 #define __must_check
477 #endif /* __GNUC__ */
478 #endif /* __must_check */
479
480 #ifndef __maybe_unused
481 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
482 #define __maybe_unused __attribute__((unused))
483 #else
484 #define __maybe_unused
485 #endif /* __GNUC__ */
486 #endif /* __must_check */
487
488 #define SSID_MAX_LEN 32
489
490 struct wpa_ssid_value {
491 u8 ssid[SSID_MAX_LEN];
492 size_t ssid_len;
493 };
494
495 int hwaddr_aton(const char *txt, u8 *addr);
496 int hwaddr_masked_aton(const char *txt, u8 *addr, u8 *mask, u8 maskable);
497 int hwaddr_compact_aton(const char *txt, u8 *addr);
498 int hwaddr_aton2(const char *txt, u8 *addr);
499 int hex2num(char c);
500 int hex2byte(const char *hex);
501 int hexstr2bin(const char *hex, u8 *buf, size_t len);
502 void inc_byte_array(u8 *counter, size_t len);
503 void buf_shift_right(u8 *buf, size_t len, size_t bits);
504 void wpa_get_ntp_timestamp(u8 *buf);
505 int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
506 PRINTF_FORMAT(3, 4);
507 int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
508 char sep);
509 int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
510 int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
511 size_t len);
512
513 int hwaddr_mask_txt(char *buf, size_t len, const u8 *addr, const u8 *mask);
514 int ssid_parse(const char *buf, struct wpa_ssid_value *ssid);
515
516 #ifdef CONFIG_NATIVE_WINDOWS
517 void wpa_unicode2ascii_inplace(TCHAR *str);
518 TCHAR * wpa_strdup_tchar(const char *str);
519 #else /* CONFIG_NATIVE_WINDOWS */
520 #define wpa_unicode2ascii_inplace(s) do { } while (0)
521 #define wpa_strdup_tchar(s) strdup((s))
522 #endif /* CONFIG_NATIVE_WINDOWS */
523
524 void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len);
525 size_t printf_decode(u8 *buf, size_t maxlen, const char *str);
526
527 const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
528
529 char * wpa_config_parse_string(const char *value, size_t *len);
530 int is_hex(const u8 *data, size_t len);
531 int has_ctrl_char(const u8 *data, size_t len);
532 int has_newline(const char *str);
533 size_t merge_byte_arrays(u8 *res, size_t res_len,
534 const u8 *src1, size_t src1_len,
535 const u8 *src2, size_t src2_len);
536 char * dup_binstr(const void *src, size_t len);
537
is_zero_ether_addr(const u8 * a)538 static inline int is_zero_ether_addr(const u8 *a)
539 {
540 return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]);
541 }
542
is_broadcast_ether_addr(const u8 * a)543 static inline int is_broadcast_ether_addr(const u8 *a)
544 {
545 return (a[0] & a[1] & a[2] & a[3] & a[4] & a[5]) == 0xff;
546 }
547
is_multicast_ether_addr(const u8 * a)548 static inline int is_multicast_ether_addr(const u8 *a)
549 {
550 return a[0] & 0x01;
551 }
552
ether_addr_equal(const u8 * a,const u8 * b)553 static inline bool ether_addr_equal(const u8 *a, const u8 *b)
554 {
555 return os_memcmp(a, b, ETH_ALEN) == 0;
556 }
557
558 #define broadcast_ether_addr (const u8 *) "\xff\xff\xff\xff\xff\xff"
559
560 #include "wpa_debug.h"
561
562
563 struct wpa_freq_range_list {
564 struct wpa_freq_range {
565 unsigned int min;
566 unsigned int max;
567 } *range;
568 unsigned int num;
569 };
570
571 int freq_range_list_parse(struct wpa_freq_range_list *res, const char *value);
572 int freq_range_list_includes(const struct wpa_freq_range_list *list,
573 unsigned int freq);
574 char * freq_range_list_str(const struct wpa_freq_range_list *list);
575
576 size_t int_array_len(const int *a);
577 void int_array_concat(int **res, const int *a);
578 void int_array_sort_unique(int *a);
579 void int_array_add_unique(int **res, int a);
580 bool int_array_includes(int *arr, int val);
581
582 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
583
584 void str_clear_free(char *str);
585 void bin_clear_free(void *bin, size_t len);
586
587 int random_mac_addr(u8 *addr);
588 int random_mac_addr_keep_oui(u8 *addr);
589
590 const char * cstr_token(const char *str, const char *delim, const char **last);
591 char * str_token(char *str, const char *delim, char **context);
592 size_t utf8_escape(const char *inp, size_t in_size,
593 char *outp, size_t out_size);
594 size_t utf8_unescape(const char *inp, size_t in_size,
595 char *outp, size_t out_size);
596 int is_ctrl_char(char c);
597
598 int str_starts(const char *str, const char *start);
599
600 u8 rssi_to_rcpi(int rssi);
601 char * get_param(const char *cmd, const char *param);
602
603 #define for_each_link(__links, __i) \
604 for ((__i) = 0; (__i) < MAX_NUM_MLD_LINKS; (__i)++) \
605 if ((__links) & BIT(__i))
606
607 /* Iterate all links, or, if no link is defined, iterate given index */
608 #define for_each_link_default(_links, _i, _def_idx) \
609 for ((_i) = (_links) ? 0 : (_def_idx); \
610 (_i) < MAX_NUM_MLD_LINKS || \
611 (!(_links) && (_i) == (_def_idx)); \
612 (_i)++) \
613 if (!(_links) || (_links) & BIT(_i))
614
615 void forced_memzero(void *ptr, size_t len);
616
617 /*
618 * gcc 4.4 ends up generating strict-aliasing warnings about some very common
619 * networking socket uses that do not really result in a real problem and
620 * cannot be easily avoided with union-based type-punning due to struct
621 * definitions including another struct in system header files. To avoid having
622 * to fully disable strict-aliasing warnings, provide a mechanism to hide the
623 * typecast from aliasing for now. A cleaner solution will hopefully be found
624 * in the future to handle these cases.
625 */
626 void * __hide_aliasing_typecast(void *foo);
627 #define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a))
628
629 #ifdef CONFIG_VALGRIND
630 #include <valgrind/memcheck.h>
631 #define WPA_MEM_DEFINED(ptr, len) VALGRIND_MAKE_MEM_DEFINED((ptr), (len))
632 #else /* CONFIG_VALGRIND */
633 #define WPA_MEM_DEFINED(ptr, len) do { } while (0)
634 #endif /* CONFIG_VALGRIND */
635
636 #endif /* COMMON_H */
637