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_LE48(const u8 * a)285 static inline u64 WPA_GET_LE48(const u8 *a)
286 {
287 return (((u64) a[5]) << 40) | (((u64) a[4]) << 32) |
288 (((u64) a[3]) << 24) | (((u64) a[2]) << 16) |
289 (((u64) a[1]) << 8) | ((u64) a[0]);
290 }
291
WPA_PUT_LE48(u8 * a,u64 val)292 static inline void WPA_PUT_LE48(u8 *a, u64 val)
293 {
294 a[5] = val >> 40;
295 a[4] = val >> 32;
296 a[3] = val >> 24;
297 a[2] = val >> 16;
298 a[1] = val >> 8;
299 a[0] = val & 0xff;
300 }
301
WPA_GET_BE64(const u8 * a)302 static inline u64 WPA_GET_BE64(const u8 *a)
303 {
304 return (((u64) a[0]) << 56) | (((u64) a[1]) << 48) |
305 (((u64) a[2]) << 40) | (((u64) a[3]) << 32) |
306 (((u64) a[4]) << 24) | (((u64) a[5]) << 16) |
307 (((u64) a[6]) << 8) | ((u64) a[7]);
308 }
309
WPA_PUT_BE64(u8 * a,u64 val)310 static inline void WPA_PUT_BE64(u8 *a, u64 val)
311 {
312 a[0] = val >> 56;
313 a[1] = val >> 48;
314 a[2] = val >> 40;
315 a[3] = val >> 32;
316 a[4] = val >> 24;
317 a[5] = val >> 16;
318 a[6] = val >> 8;
319 a[7] = val & 0xff;
320 }
321
WPA_GET_LE64(const u8 * a)322 static inline u64 WPA_GET_LE64(const u8 *a)
323 {
324 return (((u64) a[7]) << 56) | (((u64) a[6]) << 48) |
325 (((u64) a[5]) << 40) | (((u64) a[4]) << 32) |
326 (((u64) a[3]) << 24) | (((u64) a[2]) << 16) |
327 (((u64) a[1]) << 8) | ((u64) a[0]);
328 }
329
WPA_PUT_LE64(u8 * a,u64 val)330 static inline void WPA_PUT_LE64(u8 *a, u64 val)
331 {
332 a[7] = val >> 56;
333 a[6] = val >> 48;
334 a[5] = val >> 40;
335 a[4] = val >> 32;
336 a[3] = val >> 24;
337 a[2] = val >> 16;
338 a[1] = val >> 8;
339 a[0] = val & 0xff;
340 }
341
342
343 #ifndef ETH_ALEN
344 #define ETH_ALEN 6
345 #endif
346 #ifndef ETH_HLEN
347 #define ETH_HLEN 14
348 #endif
349 #ifndef IFNAMSIZ
350 #define IFNAMSIZ 16
351 #endif
352 #ifndef ETH_P_ALL
353 #define ETH_P_ALL 0x0003
354 #endif
355 #ifndef ETH_P_IP
356 #define ETH_P_IP 0x0800
357 #endif
358 #ifndef ETH_P_80211_ENCAP
359 #define ETH_P_80211_ENCAP 0x890d /* TDLS comes under this category */
360 #endif
361 #ifndef ETH_P_PAE
362 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
363 #endif /* ETH_P_PAE */
364 #ifndef ETH_P_EAPOL
365 #define ETH_P_EAPOL ETH_P_PAE
366 #endif /* ETH_P_EAPOL */
367 #ifndef ETH_P_RSN_PREAUTH
368 #define ETH_P_RSN_PREAUTH 0x88c7
369 #endif /* ETH_P_RSN_PREAUTH */
370 #ifndef ETH_P_RRB
371 #define ETH_P_RRB 0x890D
372 #endif /* ETH_P_RRB */
373 #ifndef ETH_P_OUI
374 #define ETH_P_OUI 0x88B7
375 #endif /* ETH_P_OUI */
376 #ifndef ETH_P_8021Q
377 #define ETH_P_8021Q 0x8100
378 #endif /* ETH_P_8021Q */
379
380
381 #ifdef __GNUC__
382 #define PRINTF_FORMAT(a,b) __attribute__ ((format (printf, (a), (b))))
383 #define STRUCT_PACKED __attribute__ ((packed))
384 #else
385 #define PRINTF_FORMAT(a,b)
386 #define STRUCT_PACKED
387 #endif
388
389
390 #ifdef CONFIG_ANSI_C_EXTRA
391
392 #if !defined(_MSC_VER) || _MSC_VER < 1400
393 /* snprintf - used in number of places; sprintf() is _not_ a good replacement
394 * due to possible buffer overflow; see, e.g.,
395 * http://www.ijs.si/software/snprintf/ for portable implementation of
396 * snprintf. */
397 int snprintf(char *str, size_t size, const char *format, ...);
398
399 /* vsnprintf - only used for wpa_msg() in wpa_supplicant.c */
400 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
401 #endif /* !defined(_MSC_VER) || _MSC_VER < 1400 */
402
403 /* getopt - only used in main.c */
404 int getopt(int argc, char *const argv[], const char *optstring);
405 extern char *optarg;
406 extern int optind;
407
408 #ifndef CONFIG_NO_SOCKLEN_T_TYPEDEF
409 #ifndef __socklen_t_defined
410 typedef int socklen_t;
411 #endif
412 #endif
413
414 /* inline - define as __inline or just define it to be empty, if needed */
415 #ifdef CONFIG_NO_INLINE
416 #define inline
417 #else
418 #define inline __inline
419 #endif
420
421 #ifndef __func__
422 #define __func__ "__func__ not defined"
423 #endif
424
425 #ifndef bswap_16
426 #define bswap_16(a) ((((u16) (a) << 8) & 0xff00) | (((u16) (a) >> 8) & 0xff))
427 #endif
428
429 #ifndef bswap_32
430 #define bswap_32(a) ((((u32) (a) << 24) & 0xff000000) | \
431 (((u32) (a) << 8) & 0xff0000) | \
432 (((u32) (a) >> 8) & 0xff00) | \
433 (((u32) (a) >> 24) & 0xff))
434 #endif
435
436 #ifndef MSG_DONTWAIT
437 #define MSG_DONTWAIT 0
438 #endif
439
440 #ifdef _WIN32_WCE
441 void perror(const char *s);
442 #endif /* _WIN32_WCE */
443
444 #endif /* CONFIG_ANSI_C_EXTRA */
445
446 #ifndef MAC2STR
447 #define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
448 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
449
450 /*
451 * Compact form for string representation of MAC address
452 * To be used, e.g., for constructing dbus paths for P2P Devices
453 */
454 #define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x"
455 #endif
456
457 #ifndef BIT
458 #define BIT(x) (1U << (x))
459 #endif
460
461 #ifndef BIT_ULL
462 #define BIT_ULL(x) (1ULL << (x))
463 #endif
464
465 #define BITS(src, mask, pos) ((src & mask) >> pos)
466
467 #ifndef MIN
468 #define MIN(a, b) ((a) < (b) ? (a) : (b))
469 #endif
470 #ifndef MAX
471 #define MAX(a, b) (((a) > (b)) ? (a) : (b))
472 #endif
473
474 /*
475 * Definitions for sparse validation
476 * (http://kernel.org/pub/linux/kernel/people/josh/sparse/)
477 */
478 #ifdef __CHECKER__
479 #define __force __attribute__((force))
480 #undef __bitwise
481 #define __bitwise __attribute__((bitwise))
482 #else
483 #define __force
484 #undef __bitwise
485 #define __bitwise
486 #endif
487
488 typedef u16 __bitwise be16;
489 typedef u16 __bitwise le16;
490 typedef u32 __bitwise be32;
491 typedef u32 __bitwise le32;
492 typedef u64 __bitwise be64;
493 typedef u64 __bitwise le64;
494
495 #ifndef __must_check
496 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
497 #define __must_check __attribute__((__warn_unused_result__))
498 #else
499 #define __must_check
500 #endif /* __GNUC__ */
501 #endif /* __must_check */
502
503 #ifndef __maybe_unused
504 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
505 #define __maybe_unused __attribute__((unused))
506 #else
507 #define __maybe_unused
508 #endif /* __GNUC__ */
509 #endif /* __must_check */
510
511 #define SSID_MAX_LEN 32
512
513 struct wpa_ssid_value {
514 u8 ssid[SSID_MAX_LEN];
515 size_t ssid_len;
516 };
517
518 int hwaddr_aton(const char *txt, u8 *addr);
519 int hwaddr_masked_aton(const char *txt, u8 *addr, u8 *mask, u8 maskable);
520 int hwaddr_compact_aton(const char *txt, u8 *addr);
521 int hwaddr_aton2(const char *txt, u8 *addr);
522 int hex2num(char c);
523 int hex2byte(const char *hex);
524 int hexstr2bin(const char *hex, u8 *buf, size_t len);
525 void inc_byte_array(u8 *counter, size_t len);
526 void buf_shift_right(u8 *buf, size_t len, size_t bits);
527 void wpa_get_ntp_timestamp(u8 *buf);
528 int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
529 PRINTF_FORMAT(3, 4);
530 int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
531 char sep);
532 int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
533 int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
534 size_t len);
535
536 int hwaddr_mask_txt(char *buf, size_t len, const u8 *addr, const u8 *mask);
537 int ssid_parse(const char *buf, struct wpa_ssid_value *ssid);
538
539 #ifdef CONFIG_NATIVE_WINDOWS
540 void wpa_unicode2ascii_inplace(TCHAR *str);
541 TCHAR * wpa_strdup_tchar(const char *str);
542 #else /* CONFIG_NATIVE_WINDOWS */
543 #define wpa_unicode2ascii_inplace(s) do { } while (0)
544 #define wpa_strdup_tchar(s) strdup((s))
545 #endif /* CONFIG_NATIVE_WINDOWS */
546
547 void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len);
548 size_t printf_decode(u8 *buf, size_t maxlen, const char *str);
549
550 const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
551
552 char * wpa_config_parse_string(const char *value, size_t *len);
553 int is_hex(const u8 *data, size_t len);
554 int has_ctrl_char(const u8 *data, size_t len);
555 int has_newline(const char *str);
556 size_t merge_byte_arrays(u8 *res, size_t res_len,
557 const u8 *src1, size_t src1_len,
558 const u8 *src2, size_t src2_len);
559 char * dup_binstr(const void *src, size_t len);
560
is_zero_ether_addr(const u8 * a)561 static inline int is_zero_ether_addr(const u8 *a)
562 {
563 return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]);
564 }
565
is_broadcast_ether_addr(const u8 * a)566 static inline int is_broadcast_ether_addr(const u8 *a)
567 {
568 return (a[0] & a[1] & a[2] & a[3] & a[4] & a[5]) == 0xff;
569 }
570
is_multicast_ether_addr(const u8 * a)571 static inline int is_multicast_ether_addr(const u8 *a)
572 {
573 return a[0] & 0x01;
574 }
575
ether_addr_equal(const u8 * a,const u8 * b)576 static inline bool ether_addr_equal(const u8 *a, const u8 *b)
577 {
578 return os_memcmp(a, b, ETH_ALEN) == 0;
579 }
580
581 #define broadcast_ether_addr (const u8 *) "\xff\xff\xff\xff\xff\xff"
582
583 #include "wpa_debug.h"
584
585
586 struct wpa_freq_range_list {
587 struct wpa_freq_range {
588 unsigned int min;
589 unsigned int max;
590 } *range;
591 unsigned int num;
592 };
593
594 int freq_range_list_parse(struct wpa_freq_range_list *res, const char *value);
595 int freq_range_list_includes(const struct wpa_freq_range_list *list,
596 unsigned int freq);
597 char * freq_range_list_str(const struct wpa_freq_range_list *list);
598
599 size_t int_array_len(const int *a);
600 void int_array_concat(int **res, const int *a);
601 void int_array_sort_unique(int *a);
602 void int_array_add_unique(int **res, int a);
603 bool int_array_includes(const int *arr, int val);
604 bool int_array_equal(const int *a, const int *b);
605 int * int_array_dup(const int *a);
606
607 #define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
608
609 void str_clear_free(char *str);
610 void bin_clear_free(void *bin, size_t len);
611
612 int random_mac_addr(u8 *addr);
613 int random_mac_addr_keep_oui(u8 *addr);
614
615 const char * cstr_token(const char *str, const char *delim, const char **last);
616 char * str_token(char *str, const char *delim, char **context);
617 size_t utf8_escape(const char *inp, size_t in_size,
618 char *outp, size_t out_size);
619 size_t utf8_unescape(const char *inp, size_t in_size,
620 char *outp, size_t out_size);
621 int is_ctrl_char(char c);
622
623 int str_starts(const char *str, const char *start);
624
625 u8 rssi_to_rcpi(int rssi);
626 char * get_param(const char *cmd, const char *param);
627
628 #define for_each_link(__links, __i) \
629 for ((__i) = 0; (__i) < MAX_NUM_MLD_LINKS; (__i)++) \
630 if ((__links) & BIT(__i))
631
632 /* Iterate all links, or, if no link is defined, iterate given index */
633 #define for_each_link_default(_links, _i, _def_idx) \
634 for ((_i) = (_links) ? 0 : (_def_idx); \
635 ((_links) && (_i) < MAX_NUM_MLD_LINKS) || \
636 (!(_links) && (_i) == (_def_idx)); \
637 (_i)++) \
638 if (!(_links) || (_links) & BIT(_i))
639
640 void forced_memzero(void *ptr, size_t len);
641
642 /*
643 * gcc 4.4 ends up generating strict-aliasing warnings about some very common
644 * networking socket uses that do not really result in a real problem and
645 * cannot be easily avoided with union-based type-punning due to struct
646 * definitions including another struct in system header files. To avoid having
647 * to fully disable strict-aliasing warnings, provide a mechanism to hide the
648 * typecast from aliasing for now. A cleaner solution will hopefully be found
649 * in the future to handle these cases.
650 */
651 void * __hide_aliasing_typecast(void *foo);
652 #define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a))
653
654 #ifdef CONFIG_VALGRIND
655 #include <valgrind/memcheck.h>
656 #define WPA_MEM_DEFINED(ptr, len) VALGRIND_MAKE_MEM_DEFINED((ptr), (len))
657 #else /* CONFIG_VALGRIND */
658 #define WPA_MEM_DEFINED(ptr, len) do { } while (0)
659 #endif /* CONFIG_VALGRIND */
660
661 #endif /* COMMON_H */
662