1 /* 2 * wpa_supplicant/hostapd / common helper functions, etc. 3 * Copyright (c) 2002-2007, Jouni Malinen <j (at) 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 CONFIG_TI_COMPILER 57 #define __BIG_ENDIAN 4321 58 #define __LITTLE_ENDIAN 1234 59 #ifdef __big_endian__ 60 #define __BYTE_ORDER __BIG_ENDIAN 61 #else 62 #define __BYTE_ORDER __LITTLE_ENDIAN 63 #endif 64 #endif /* CONFIG_TI_COMPILER */ 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 #ifdef CONFIG_TI_COMPILER 114 #ifdef _LLONG_AVAILABLE 115 typedef unsigned long long u64; 116 #else 117 /* 118 * TODO: 64-bit variable not available. Using long as a workaround to test the 119 * build, but this will likely not work for all operations. 120 */ 121 typedef unsigned long u64; 122 #endif 123 typedef unsigned int u32; 124 typedef unsigned short u16; 125 typedef unsigned char u8; 126 #define WPA_TYPES_DEFINED 127 #endif /* CONFIG_TI_COMPILER */ 128 129 #ifndef WPA_TYPES_DEFINED 130 #ifdef CONFIG_USE_INTTYPES_H 131 #include <inttypes.h> 132 #else 133 #include <stdint.h> 134 #endif 135 typedef uint64_t u64; 136 typedef uint32_t u32; 137 typedef uint16_t u16; 138 typedef uint8_t u8; 139 typedef int64_t s64; 140 typedef int32_t s32; 141 typedef int16_t s16; 142 typedef int8_t s8; 143 #define WPA_TYPES_DEFINED 144 #endif /* !WPA_TYPES_DEFINED */ 145 146 147 /* Define platform specific byte swapping macros */ 148 149 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS) 150 151 static inline unsigned short wpa_swap_16(unsigned short v) 152 { 153 return ((v & 0xff) << 8) | (v >> 8); 154 } 155 156 static inline unsigned int wpa_swap_32(unsigned int v) 157 { 158 return ((v & 0xff) << 24) | ((v & 0xff00) << 8) | 159 ((v & 0xff0000) >> 8) | (v >> 24); 160 } 161 162 #define le_to_host16(n) (n) 163 #define host_to_le16(n) (n) 164 #define be_to_host16(n) wpa_swap_16(n) 165 #define host_to_be16(n) wpa_swap_16(n) 166 #define le_to_host32(n) (n) 167 #define be_to_host32(n) wpa_swap_32(n) 168 #define host_to_be32(n) wpa_swap_32(n) 169 170 #define WPA_BYTE_SWAP_DEFINED 171 172 #endif /* __CYGWIN__ || CONFIG_NATIVE_WINDOWS */ 173 174 175 #ifndef WPA_BYTE_SWAP_DEFINED 176 177 #ifndef __BYTE_ORDER 178 #ifndef __LITTLE_ENDIAN 179 #ifndef __BIG_ENDIAN 180 #define __LITTLE_ENDIAN 1234 181 #define __BIG_ENDIAN 4321 182 #if defined(sparc) 183 #define __BYTE_ORDER __BIG_ENDIAN 184 #endif 185 #endif /* __BIG_ENDIAN */ 186 #endif /* __LITTLE_ENDIAN */ 187 #endif /* __BYTE_ORDER */ 188 189 #if __BYTE_ORDER == __LITTLE_ENDIAN 190 #define le_to_host16(n) ((__force u16) (le16) (n)) 191 #define host_to_le16(n) ((__force le16) (u16) (n)) 192 #define be_to_host16(n) bswap_16((__force u16) (be16) (n)) 193 #define host_to_be16(n) ((__force be16) bswap_16((n))) 194 #define le_to_host32(n) ((__force u32) (le32) (n)) 195 #define host_to_le32(n) ((__force le32) (u32) (n)) 196 #define be_to_host32(n) bswap_32((__force u32) (be32) (n)) 197 #define host_to_be32(n) ((__force be32) bswap_32((n))) 198 #define le_to_host64(n) ((__force u64) (le64) (n)) 199 #define host_to_le64(n) ((__force le64) (u64) (n)) 200 #define be_to_host64(n) bswap_64((__force u64) (be64) (n)) 201 #define host_to_be64(n) ((__force be64) bswap_64((n))) 202 #elif __BYTE_ORDER == __BIG_ENDIAN 203 #define le_to_host16(n) bswap_16(n) 204 #define host_to_le16(n) bswap_16(n) 205 #define be_to_host16(n) (n) 206 #define host_to_be16(n) (n) 207 #define le_to_host32(n) bswap_32(n) 208 #define host_to_le32(n) bswap_32(n) 209 #define be_to_host32(n) (n) 210 #define host_to_be32(n) (n) 211 #define le_to_host64(n) bswap_64(n) 212 #define host_to_le64(n) bswap_64(n) 213 #define be_to_host64(n) (n) 214 #define host_to_be64(n) (n) 215 #ifndef WORDS_BIGENDIAN 216 #define WORDS_BIGENDIAN 217 #endif 218 #else 219 #error Could not determine CPU byte order 220 #endif 221 222 #define WPA_BYTE_SWAP_DEFINED 223 #endif /* !WPA_BYTE_SWAP_DEFINED */ 224 225 226 /* Macros for handling unaligned memory accesses */ 227 228 static inline u16 WPA_GET_BE16(const u8 *a) 229 { 230 return (a[0] << 8) | a[1]; 231 } 232 233 static inline void WPA_PUT_BE16(u8 *a, u16 val) 234 { 235 a[0] = val >> 8; 236 a[1] = val & 0xff; 237 } 238 239 static inline u16 WPA_GET_LE16(const u8 *a) 240 { 241 return (a[1] << 8) | a[0]; 242 } 243 244 static inline void WPA_PUT_LE16(u8 *a, u16 val) 245 { 246 a[1] = val >> 8; 247 a[0] = val & 0xff; 248 } 249 250 static inline u32 WPA_GET_BE24(const u8 *a) 251 { 252 return (a[0] << 16) | (a[1] << 8) | a[2]; 253 } 254 255 static inline void WPA_PUT_BE24(u8 *a, u32 val) 256 { 257 a[0] = (val >> 16) & 0xff; 258 a[1] = (val >> 8) & 0xff; 259 a[2] = val & 0xff; 260 } 261 262 static inline u32 WPA_GET_BE32(const u8 *a) 263 { 264 return (a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3]; 265 } 266 267 static inline void WPA_PUT_BE32(u8 *a, u32 val) 268 { 269 a[0] = (val >> 24) & 0xff; 270 a[1] = (val >> 16) & 0xff; 271 a[2] = (val >> 8) & 0xff; 272 a[3] = val & 0xff; 273 } 274 275 static inline u32 WPA_GET_LE32(const u8 *a) 276 { 277 return (a[3] << 24) | (a[2] << 16) | (a[1] << 8) | a[0]; 278 } 279 280 static inline void WPA_PUT_LE32(u8 *a, u32 val) 281 { 282 a[3] = (val >> 24) & 0xff; 283 a[2] = (val >> 16) & 0xff; 284 a[1] = (val >> 8) & 0xff; 285 a[0] = val & 0xff; 286 } 287 288 static inline u64 WPA_GET_BE64(const u8 *a) 289 { 290 return (((u64) a[0]) << 56) | (((u64) a[1]) << 48) | 291 (((u64) a[2]) << 40) | (((u64) a[3]) << 32) | 292 (((u64) a[4]) << 24) | (((u64) a[5]) << 16) | 293 (((u64) a[6]) << 8) | ((u64) a[7]); 294 } 295 296 static inline void WPA_PUT_BE64(u8 *a, u64 val) 297 { 298 a[0] = val >> 56; 299 a[1] = val >> 48; 300 a[2] = val >> 40; 301 a[3] = val >> 32; 302 a[4] = val >> 24; 303 a[5] = val >> 16; 304 a[6] = val >> 8; 305 a[7] = val & 0xff; 306 } 307 308 static inline u64 WPA_GET_LE64(const u8 *a) 309 { 310 return (((u64) a[7]) << 56) | (((u64) a[6]) << 48) | 311 (((u64) a[5]) << 40) | (((u64) a[4]) << 32) | 312 (((u64) a[3]) << 24) | (((u64) a[2]) << 16) | 313 (((u64) a[1]) << 8) | ((u64) a[0]); 314 } 315 316 static inline void WPA_PUT_LE64(u8 *a, u64 val) 317 { 318 a[7] = val >> 56; 319 a[6] = val >> 48; 320 a[5] = val >> 40; 321 a[4] = val >> 32; 322 a[3] = val >> 24; 323 a[2] = val >> 16; 324 a[1] = val >> 8; 325 a[0] = val & 0xff; 326 } 327 328 329 #ifndef ETH_ALEN 330 #define ETH_ALEN 6 331 #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_80211_ENCAP 339 #define ETH_P_80211_ENCAP 0x890d /* TDLS comes under this category */ 340 #endif 341 #ifndef ETH_P_PAE 342 #define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */ 343 #endif /* ETH_P_PAE */ 344 #ifndef ETH_P_EAPOL 345 #define ETH_P_EAPOL ETH_P_PAE 346 #endif /* ETH_P_EAPOL */ 347 #ifndef ETH_P_RSN_PREAUTH 348 #define ETH_P_RSN_PREAUTH 0x88c7 349 #endif /* ETH_P_RSN_PREAUTH */ 350 #ifndef ETH_P_RRB 351 #define ETH_P_RRB 0x890D 352 #endif /* ETH_P_RRB */ 353 354 355 #ifdef __GNUC__ 356 #define PRINTF_FORMAT(a,b) __attribute__ ((format (printf, (a), (b)))) 357 #define STRUCT_PACKED __attribute__ ((packed)) 358 #else 359 #define PRINTF_FORMAT(a,b) 360 #define STRUCT_PACKED 361 #endif 362 363 364 #ifdef CONFIG_ANSI_C_EXTRA 365 366 #if !defined(_MSC_VER) || _MSC_VER < 1400 367 /* snprintf - used in number of places; sprintf() is _not_ a good replacement 368 * due to possible buffer overflow; see, e.g., 369 * http://www.ijs.si/software/snprintf/ for portable implementation of 370 * snprintf. */ 371 int snprintf(char *str, size_t size, const char *format, ...); 372 373 /* vsnprintf - only used for wpa_msg() in wpa_supplicant.c */ 374 int vsnprintf(char *str, size_t size, const char *format, va_list ap); 375 #endif /* !defined(_MSC_VER) || _MSC_VER < 1400 */ 376 377 /* getopt - only used in main.c */ 378 int getopt(int argc, char *const argv[], const char *optstring); 379 extern char *optarg; 380 extern int optind; 381 382 #ifndef CONFIG_NO_SOCKLEN_T_TYPEDEF 383 #ifndef __socklen_t_defined 384 typedef int socklen_t; 385 #endif 386 #endif 387 388 /* inline - define as __inline or just define it to be empty, if needed */ 389 #ifdef CONFIG_NO_INLINE 390 #define inline 391 #else 392 #define inline __inline 393 #endif 394 395 #ifndef __func__ 396 #define __func__ "__func__ not defined" 397 #endif 398 399 #ifndef bswap_16 400 #define bswap_16(a) ((((u16) (a) << 8) & 0xff00) | (((u16) (a) >> 8) & 0xff)) 401 #endif 402 403 #ifndef bswap_32 404 #define bswap_32(a) ((((u32) (a) << 24) & 0xff000000) | \ 405 (((u32) (a) << 8) & 0xff0000) | \ 406 (((u32) (a) >> 8) & 0xff00) | \ 407 (((u32) (a) >> 24) & 0xff)) 408 #endif 409 410 #ifndef MSG_DONTWAIT 411 #define MSG_DONTWAIT 0 412 #endif 413 414 #ifdef _WIN32_WCE 415 void perror(const char *s); 416 #endif /* _WIN32_WCE */ 417 418 #endif /* CONFIG_ANSI_C_EXTRA */ 419 420 #ifndef MAC2STR 421 #define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5] 422 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x" 423 424 /* 425 * Compact form for string representation of MAC address 426 * To be used, e.g., for constructing dbus paths for P2P Devices 427 */ 428 #define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x" 429 #endif 430 431 #ifndef BIT 432 #define BIT(x) (1 << (x)) 433 #endif 434 435 /* 436 * Definitions for sparse validation 437 * (http://kernel.org/pub/linux/kernel/people/josh/sparse/) 438 */ 439 #ifdef __CHECKER__ 440 #define __force __attribute__((force)) 441 #define __bitwise __attribute__((bitwise)) 442 #else 443 #define __force 444 #define __bitwise 445 #endif 446 447 typedef u16 __bitwise be16; 448 typedef u16 __bitwise le16; 449 typedef u32 __bitwise be32; 450 typedef u32 __bitwise le32; 451 typedef u64 __bitwise be64; 452 typedef u64 __bitwise le64; 453 454 #ifndef __must_check 455 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4) 456 #define __must_check __attribute__((__warn_unused_result__)) 457 #else 458 #define __must_check 459 #endif /* __GNUC__ */ 460 #endif /* __must_check */ 461 462 int hwaddr_aton(const char *txt, u8 *addr); 463 int hwaddr_compact_aton(const char *txt, u8 *addr); 464 int hwaddr_aton2(const char *txt, u8 *addr); 465 int hex2byte(const char *hex); 466 int hexstr2bin(const char *hex, u8 *buf, size_t len); 467 void inc_byte_array(u8 *counter, size_t len); 468 void wpa_get_ntp_timestamp(u8 *buf); 469 int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len); 470 int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data, 471 size_t len); 472 473 #ifdef CONFIG_NATIVE_WINDOWS 474 void wpa_unicode2ascii_inplace(TCHAR *str); 475 TCHAR * wpa_strdup_tchar(const char *str); 476 #else /* CONFIG_NATIVE_WINDOWS */ 477 #define wpa_unicode2ascii_inplace(s) do { } while (0) 478 #define wpa_strdup_tchar(s) strdup((s)) 479 #endif /* CONFIG_NATIVE_WINDOWS */ 480 481 void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len); 482 size_t printf_decode(u8 *buf, size_t maxlen, const char *str); 483 484 const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len); 485 486 char * wpa_config_parse_string(const char *value, size_t *len); 487 int is_hex(const u8 *data, size_t len); 488 size_t merge_byte_arrays(u8 *res, size_t res_len, 489 const u8 *src1, size_t src1_len, 490 const u8 *src2, size_t src2_len); 491 char * dup_binstr(const void *src, size_t len); 492 493 static inline int is_zero_ether_addr(const u8 *a) 494 { 495 return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]); 496 } 497 498 static inline int is_broadcast_ether_addr(const u8 *a) 499 { 500 return (a[0] & a[1] & a[2] & a[3] & a[4] & a[5]) == 0xff; 501 } 502 503 #define broadcast_ether_addr (const u8 *) "\xff\xff\xff\xff\xff\xff" 504 505 #include "wpa_debug.h" 506 507 508 /* 509 * gcc 4.4 ends up generating strict-aliasing warnings about some very common 510 * networking socket uses that do not really result in a real problem and 511 * cannot be easily avoided with union-based type-punning due to struct 512 * definitions including another struct in system header files. To avoid having 513 * to fully disable strict-aliasing warnings, provide a mechanism to hide the 514 * typecast from aliasing for now. A cleaner solution will hopefully be found 515 * in the future to handle these cases. 516 */ 517 void * __hide_aliasing_typecast(void *foo); 518 #define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a)) 519 520 #ifdef CONFIG_VALGRIND 521 #include <valgrind/memcheck.h> 522 #define WPA_MEM_DEFINED(ptr, len) VALGRIND_MAKE_MEM_DEFINED((ptr), (len)) 523 #else /* CONFIG_VALGRIND */ 524 #define WPA_MEM_DEFINED(ptr, len) do { } while (0) 525 #endif /* CONFIG_VALGRIND */ 526 527 #endif /* COMMON_H */ 528
