1 /*
2 * wpa_supplicant/hostapd / common helper functions, etc.
3 * Copyright (c) 2002-2007, Jouni Malinen <[email protected]>
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 "includes.h"
13 #include "os.h"
14
15 #if defined(__linux__) || defined(__GLIBC__)
16 #include <endian.h>
17 #include <byteswap.h>
18 #endif /* __linux__ */
19
20 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
21 defined(__OpenBSD__)
22 #include <sys/types.h>
23 #include <sys/endian.h>
24 #define __BYTE_ORDER _BYTE_ORDER
25 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
26 #define __BIG_ENDIAN _BIG_ENDIAN
27 #ifdef __OpenBSD__
28 #define bswap_16 swap16
29 #define bswap_32 swap32
30 #define bswap_64 swap64
31 #else /* __OpenBSD__ */
32 #define bswap_16 bswap16
33 #define bswap_32 bswap32
34 #define bswap_64 bswap64
35 #endif /* __OpenBSD__ */
36 #endif /* defined(__FreeBSD__) || defined(__NetBSD__) ||
37 * defined(__DragonFly__) || defined(__OpenBSD__) */
38
39 #ifdef __APPLE__
40 #include <sys/types.h>
41 #include <machine/endian.h>
42 #define __BYTE_ORDER _BYTE_ORDER
43 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
44 #define __BIG_ENDIAN _BIG_ENDIAN
bswap_16(unsigned short v)45 static inline unsigned short bswap_16(unsigned short v)
46 {
47 return ((v & 0xff) << 8) | (v >> 8);
48 }
49
bswap_32(unsigned int v)50 static inline unsigned int bswap_32(unsigned int v)
51 {
52 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
53 ((v & 0xff0000) >> 8) | (v >> 24);
54 }
55 #endif /* __APPLE__ */
56
57 #ifdef __rtems__
58 #include <rtems/endian.h>
59 #define __BYTE_ORDER BYTE_ORDER
60 #define __LITTLE_ENDIAN LITTLE_ENDIAN
61 #define __BIG_ENDIAN BIG_ENDIAN
62 #define bswap_16 CPU_swap_u16
63 #define bswap_32 CPU_swap_u32
64 #endif /* __rtems__ */
65
66 #ifdef CONFIG_NATIVE_WINDOWS
67 #include <winsock.h>
68
69 typedef int socklen_t;
70
71 #ifndef MSG_DONTWAIT
72 #define MSG_DONTWAIT 0 /* not supported */
73 #endif
74
75 #endif /* CONFIG_NATIVE_WINDOWS */
76
77 #ifdef _MSC_VER
78 #define inline __inline
79
80 #undef vsnprintf
81 #define vsnprintf _vsnprintf
82 #undef close
83 #define close closesocket
84 #endif /* _MSC_VER */
85
86
87 /* Define platform specific integer types */
88
89 #ifdef _MSC_VER
90 typedef UINT64 u64;
91 typedef UINT32 u32;
92 typedef UINT16 u16;
93 typedef UINT8 u8;
94 typedef INT64 s64;
95 typedef INT32 s32;
96 typedef INT16 s16;
97 typedef INT8 s8;
98 #define WPA_TYPES_DEFINED
99 #endif /* _MSC_VER */
100
101 #ifdef __vxworks
102 typedef unsigned long long u64;
103 typedef UINT32 u32;
104 typedef UINT16 u16;
105 typedef UINT8 u8;
106 typedef long long s64;
107 typedef INT32 s32;
108 typedef INT16 s16;
109 typedef INT8 s8;
110 #define WPA_TYPES_DEFINED
111 #endif /* __vxworks */
112
113 #ifndef WPA_TYPES_DEFINED
114 #ifdef CONFIG_USE_INTTYPES_H
115 #include <inttypes.h>
116 #else
117 #include <stdint.h>
118 #endif
119 typedef uint64_t u64;
120 typedef uint32_t u32;
121 typedef uint16_t u16;
122 typedef uint8_t u8;
123 typedef int64_t s64;
124 typedef int32_t s32;
125 typedef int16_t s16;
126 typedef int8_t s8;
127 #define WPA_TYPES_DEFINED
128 #endif /* !WPA_TYPES_DEFINED */
129
130
131 /* Define platform specific byte swapping macros */
132
133 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
134
wpa_swap_16(unsigned short v)135 static inline unsigned short wpa_swap_16(unsigned short v)
136 {
137 return ((v & 0xff) << 8) | (v >> 8);
138 }
139
wpa_swap_32(unsigned int v)140 static inline unsigned int wpa_swap_32(unsigned int v)
141 {
142 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
143 ((v & 0xff0000) >> 8) | (v >> 24);
144 }
145
146 #define le_to_host16(n) (n)
147 #define host_to_le16(n) (n)
148 #define be_to_host16(n) wpa_swap_16(n)
149 #define host_to_be16(n) wpa_swap_16(n)
150 #define le_to_host32(n) (n)
151 #define host_to_le32(n) (n)
152 #define be_to_host32(n) wpa_swap_32(n)
153 #define host_to_be32(n) wpa_swap_32(n)
154 #define host_to_le64(n) (n)
155
156 #define WPA_BYTE_SWAP_DEFINED
157
158 #endif /* __CYGWIN__ || CONFIG_NATIVE_WINDOWS */
159
160
161 #ifndef WPA_BYTE_SWAP_DEFINED
162
163 #ifndef __BYTE_ORDER
164 #ifndef __LITTLE_ENDIAN
165 #ifndef __BIG_ENDIAN
166 #define __LITTLE_ENDIAN 1234
167 #define __BIG_ENDIAN 4321
168 #if defined(sparc)
169 #define __BYTE_ORDER __BIG_ENDIAN
170 #endif
171 #endif /* __BIG_ENDIAN */
172 #endif /* __LITTLE_ENDIAN */
173 #endif /* __BYTE_ORDER */
174
175 #if __BYTE_ORDER == __LITTLE_ENDIAN
176 #define le_to_host16(n) ((__force u16) (le16) (n))
177 #define host_to_le16(n) ((__force le16) (u16) (n))
178 #define be_to_host16(n) bswap_16((__force u16) (be16) (n))
179 #define host_to_be16(n) ((__force be16) bswap_16((n)))
180 #define le_to_host32(n) ((__force u32) (le32) (n))
181 #define host_to_le32(n) ((__force le32) (u32) (n))
182 #define be_to_host32(n) bswap_32((__force u32) (be32) (n))
183 #define host_to_be32(n) ((__force be32) bswap_32((n)))
184 #define le_to_host64(n) ((__force u64) (le64) (n))
185 #define host_to_le64(n) ((__force le64) (u64) (n))
186 #define be_to_host64(n) bswap_64((__force u64) (be64) (n))
187 #define host_to_be64(n) ((__force be64) bswap_64((n)))
188 #elif __BYTE_ORDER == __BIG_ENDIAN
189 #define le_to_host16(n) bswap_16(n)
190 #define host_to_le16(n) bswap_16(n)
191 #define be_to_host16(n) (n)
192 #define host_to_be16(n) (n)
193 #define le_to_host32(n) bswap_32(n)
194 #define host_to_le32(n) bswap_32(n)
195 #define be_to_host32(n) (n)
196 #define host_to_be32(n) (n)
197 #define le_to_host64(n) bswap_64(n)
198 #define host_to_le64(n) bswap_64(n)
199 #define be_to_host64(n) (n)
200 #define host_to_be64(n) (n)
201 #ifndef WORDS_BIGENDIAN
202 #define WORDS_BIGENDIAN
203 #endif
204 #else
205 #error Could not determine CPU byte order
206 #endif
207
208 #define WPA_BYTE_SWAP_DEFINED
209 #endif /* !WPA_BYTE_SWAP_DEFINED */
210
211
212 /* Macros for handling unaligned memory accesses */
213
WPA_GET_BE16(const u8 * a)214 static inline u16 WPA_GET_BE16(const u8 *a)
215 {
216 return (a[0] << 8) | a[1];
217 }
218
WPA_PUT_BE16(u8 * a,u16 val)219 static inline void WPA_PUT_BE16(u8 *a, u16 val)
220 {
221 a[0] = val >> 8;
222 a[1] = val & 0xff;
223 }
224
WPA_GET_LE16(const u8 * a)225 static inline u16 WPA_GET_LE16(const u8 *a)
226 {
227 return (a[1] << 8) | a[0];
228 }
229
WPA_PUT_LE16(u8 * a,u16 val)230 static inline void WPA_PUT_LE16(u8 *a, u16 val)
231 {
232 a[1] = val >> 8;
233 a[0] = val & 0xff;
234 }
235
WPA_GET_BE24(const u8 * a)236 static inline u32 WPA_GET_BE24(const u8 *a)
237 {
238 return (a[0] << 16) | (a[1] << 8) | a[2];
239 }
240
WPA_PUT_BE24(u8 * a,u32 val)241 static inline void WPA_PUT_BE24(u8 *a, u32 val)
242 {
243 a[0] = (val >> 16) & 0xff;
244 a[1] = (val >> 8) & 0xff;
245 a[2] = val & 0xff;
246 }
247
WPA_GET_LE24(const u8 * a)248 static inline u32 WPA_GET_LE24(const u8 *a)
249 {
250 return (a[2] << 16) | (a[1] << 8) | a[0];
251 }
252
WPA_PUT_LE24(u8 * a,u32 val)253 static inline void WPA_PUT_LE24(u8 *a, u32 val)
254 {
255 a[2] = (val >> 16) & 0xff;
256 a[1] = (val >> 8) & 0xff;
257 a[0] = 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(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
432 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
433
434 /*
435 * Compact form for string representation of MAC address
436 * To be used, e.g., for constructing dbus paths for P2P Devices
437 */
438 #define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x"
439 #endif
440
441 #ifndef BIT
442 #define BIT(x) (1U << (x))
443 #endif
444
445 #ifndef MIN
446 #define MIN(a, b) ((a) < (b) ? (a) : (b))
447 #endif
448 #ifndef MAX
449 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
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 hex2num(char c);
501 int hex2byte(const char *hex);
502 int hexstr2bin(const char *hex, u8 *buf, size_t len);
503 void inc_byte_array(u8 *counter, size_t len);
504 void buf_shift_right(u8 *buf, size_t len, size_t bits);
505 void wpa_get_ntp_timestamp(u8 *buf);
506 int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
507 PRINTF_FORMAT(3, 4);
508 int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
509 char sep);
510 int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
511 int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
512 size_t len);
513
514 int hwaddr_mask_txt(char *buf, size_t len, const u8 *addr, const u8 *mask);
515 int ssid_parse(const char *buf, struct wpa_ssid_value *ssid);
516
517 #ifdef CONFIG_NATIVE_WINDOWS
518 void wpa_unicode2ascii_inplace(TCHAR *str);
519 TCHAR * wpa_strdup_tchar(const char *str);
520 #else /* CONFIG_NATIVE_WINDOWS */
521 #define wpa_unicode2ascii_inplace(s) do { } while (0)
522 #define wpa_strdup_tchar(s) strdup((s))
523 #endif /* CONFIG_NATIVE_WINDOWS */
524
525 void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len);
526 size_t printf_decode(u8 *buf, size_t maxlen, const char *str);
527
528 const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
529
530 char * wpa_config_parse_string(const char *value, size_t *len);
531 int is_hex(const u8 *data, size_t len);
532 int has_ctrl_char(const u8 *data, size_t len);
533 int has_newline(const char *str);
534 size_t merge_byte_arrays(u8 *res, size_t res_len,
535 const u8 *src1, size_t src1_len,
536 const u8 *src2, size_t src2_len);
537 char * dup_binstr(const void *src, size_t len);
538
is_zero_ether_addr(const u8 * a)539 static inline int is_zero_ether_addr(const u8 *a)
540 {
541 return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]);
542 }
543
is_broadcast_ether_addr(const u8 * a)544 static inline int is_broadcast_ether_addr(const u8 *a)
545 {
546 return (a[0] & a[1] & a[2] & a[3] & a[4] & a[5]) == 0xff;
547 }
548
is_multicast_ether_addr(const u8 * a)549 static inline int is_multicast_ether_addr(const u8 *a)
550 {
551 return a[0] & 0x01;
552 }
553
ether_addr_equal(const u8 * a,const u8 * b)554 static inline bool ether_addr_equal(const u8 *a, const u8 *b)
555 {
556 return os_memcmp(a, b, ETH_ALEN) == 0;
557 }
558
559 #define broadcast_ether_addr (const u8 *) "\xff\xff\xff\xff\xff\xff"
560
561 #include "wpa_debug.h"
562
563
564 struct wpa_freq_range_list {
565 struct wpa_freq_range {
566 unsigned int min;
567 unsigned int max;
568 } *range;
569 unsigned int num;
570 };
571
572 int freq_range_list_parse(struct wpa_freq_range_list *res, const char *value);
573 int freq_range_list_includes(const struct wpa_freq_range_list *list,
574 unsigned int freq);
575 char * freq_range_list_str(const struct wpa_freq_range_list *list);
576
577 size_t int_array_len(const int *a);
578 void int_array_concat(int **res, const int *a);
579 void int_array_sort_unique(int *a);
580 void int_array_add_unique(int **res, int a);
581 bool int_array_includes(int *arr, int val);
582
583 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
584
585 void str_clear_free(char *str);
586 void bin_clear_free(void *bin, size_t len);
587
588 int random_mac_addr(u8 *addr);
589 int random_mac_addr_keep_oui(u8 *addr);
590
591 const char * cstr_token(const char *str, const char *delim, const char **last);
592 char * str_token(char *str, const char *delim, char **context);
593 size_t utf8_escape(const char *inp, size_t in_size,
594 char *outp, size_t out_size);
595 size_t utf8_unescape(const char *inp, size_t in_size,
596 char *outp, size_t out_size);
597 int is_ctrl_char(char c);
598
599 int str_starts(const char *str, const char *start);
600
601 u8 rssi_to_rcpi(int rssi);
602 char * get_param(const char *cmd, const char *param);
603
604 #define for_each_link(__links, __i) \
605 for ((__i) = 0; (__i) < MAX_NUM_MLD_LINKS; (__i)++) \
606 if ((__links) & BIT(__i))
607
608 /* Iterate all links, or, if no link is defined, iterate given index */
609 #define for_each_link_default(_links, _i, _def_idx) \
610 for ((_i) = (_links) ? 0 : (_def_idx); \
611 (_i) < MAX_NUM_MLD_LINKS || \
612 (!(_links) && (_i) == (_def_idx)); \
613 (_i)++) \
614 if (!(_links) || (_links) & BIT(_i))
615
616 void forced_memzero(void *ptr, size_t len);
617
618 /*
619 * gcc 4.4 ends up generating strict-aliasing warnings about some very common
620 * networking socket uses that do not really result in a real problem and
621 * cannot be easily avoided with union-based type-punning due to struct
622 * definitions including another struct in system header files. To avoid having
623 * to fully disable strict-aliasing warnings, provide a mechanism to hide the
624 * typecast from aliasing for now. A cleaner solution will hopefully be found
625 * in the future to handle these cases.
626 */
627 void * __hide_aliasing_typecast(void *foo);
628 #define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a))
629
630 #ifdef CONFIG_VALGRIND
631 #include <valgrind/memcheck.h>
632 #define WPA_MEM_DEFINED(ptr, len) VALGRIND_MAKE_MEM_DEFINED((ptr), (len))
633 #else /* CONFIG_VALGRIND */
634 #define WPA_MEM_DEFINED(ptr, len) do { } while (0)
635 #endif /* CONFIG_VALGRIND */
636
637 #endif /* COMMON_H */
638