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 44 static inline unsigned short bswap_16(unsigned short v) 45 { 46 return ((v & 0xff) << 8) | (v >> 8); 47 } 48 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) 133 134 static inline unsigned short wpa_swap_16(unsigned short v) 135 { 136 return ((v & 0xff) << 8) | (v >> 8); 137 } 138 139 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 */ 212 213 static inline u16 WPA_GET_BE16(const u8 *a) 214 { 215 return (a[0] << 8) | a[1]; 216 } 217 218 static inline void WPA_PUT_BE16(u8 *a, u16 val) 219 { 220 a[0] = val >> 8; 221 a[1] = val & 0xff; 222 } 223 224 static inline u16 WPA_GET_LE16(const u8 *a) 225 { 226 return (a[1] << 8) | a[0]; 227 } 228 229 static inline void WPA_PUT_LE16(u8 *a, u16 val) 230 { 231 a[1] = val >> 8; 232 a[0] = val & 0xff; 233 } 234 235 static inline u32 WPA_GET_BE24(const u8 *a) 236 { 237 return (a[0] << 16) | (a[1] << 8) | a[2]; 238 } 239 240 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 } 246 247 static inline u32 WPA_GET_LE24(const u8 *a) 248 { 249 return (a[2] << 16) | (a[1] << 8) | a[0]; 250 } 251 252 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 } 258 259 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 } 263 264 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 } 271 272 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 } 276 277 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 } 284 285 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 } 291 292 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 } 301 302 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 } 309 310 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 } 321 322 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 } 329 330 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); 560 561 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 } 565 566 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 } 570 571 static inline int is_multicast_ether_addr(const u8 *a) 572 { 573 return a[0] & 0x01; 574 } 575 576 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