dist/wpa/src/utils/common.h

   1 /*
   2  * wpa_supplicant/hostapd / common helper functions, etc.
   3  * Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * Alternatively, this software may be distributed under the terms of BSD
  10  * license.
  11  *
  12  * See README and COPYING for more details.
  13  */
  14
  15 #ifndef COMMON_H
  16 #define COMMON_H
  17
  18 #include "os.h"
  19
  20 #ifdef __linux__
  21 #include <endian.h>
  22 #include <byteswap.h>
  23 #endif /* __linux__ */
  24
  25 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__)
  26 #include <sys/types.h>
  27 #include <sys/endian.h>
  28 #define __BYTE_ORDER    _BYTE_ORDER
  29 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
  30 #define __BIG_ENDIAN    _BIG_ENDIAN
  31 #define bswap_16 bswap16
  32 #define bswap_32 bswap32
  33 #define bswap_64 bswap64
  34 #endif /* defined(__FreeBSD__) || defined(__NetBSD__) ||
  35         * defined(__DragonFly__) */
  36
  37 #ifdef __APPLE__
  38 #include <sys/types.h>
  39 #include <machine/endian.h>
  40 #define __BYTE_ORDER    _BYTE_ORDER
  41 #define __LITTLE_ENDIAN _LITTLE_ENDIAN
  42 #define __BIG_ENDIAN    _BIG_ENDIAN
  43 static inline unsigned short bswap_16(unsigned short v)
  44 {
  45         return ((v & 0xff) << 8) | (v >> 8);
  46 }
  47
  48 static inline unsigned int bswap_32(unsigned int v)
  49 {
  50         return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
  51                 ((v & 0xff0000) >> 8) | (v >> 24);
  52 }
  53 #endif /* __APPLE__ */
  54
  55 #ifdef CONFIG_TI_COMPILER
  56 #define __BIG_ENDIAN 4321
  57 #define __LITTLE_ENDIAN 1234
  58 #ifdef __big_endian__
  59 #define __BYTE_ORDER __BIG_ENDIAN
  60 #else
  61 #define __BYTE_ORDER __LITTLE_ENDIAN
  62 #endif
  63 #endif /* CONFIG_TI_COMPILER */
  64
  65 #ifdef __SYMBIAN32__
  66 #define __BIG_ENDIAN 4321
  67 #define __LITTLE_ENDIAN 1234
  68 #define __BYTE_ORDER __LITTLE_ENDIAN
  69 #endif /* __SYMBIAN32__ */
  70
  71 #ifdef CONFIG_NATIVE_WINDOWS
  72 #include <winsock.h>
  73
  74 typedef int socklen_t;
  75
  76 #ifndef MSG_DONTWAIT
  77 #define MSG_DONTWAIT 0 /* not supported */
  78 #endif
  79
  80 #endif /* CONFIG_NATIVE_WINDOWS */
  81
  82 #ifdef _MSC_VER
  83 #define inline __inline
  84
  85 #undef vsnprintf
  86 #define vsnprintf _vsnprintf
  87 #undef close
  88 #define close closesocket
  89 #endif /* _MSC_VER */
  90
  91
  92 /* Define platform specific integer types */
  93
  94 #ifdef _MSC_VER
  95 typedef UINT64 u64;
  96 typedef UINT32 u32;
  97 typedef UINT16 u16;
  98 typedef UINT8 u8;
  99 typedef INT64 s64;
 100 typedef INT32 s32;
 101 typedef INT16 s16;
 102 typedef INT8 s8;
 103 #define WPA_TYPES_DEFINED
 104 #endif /* _MSC_VER */
 105
 106 #ifdef __vxworks
 107 typedef unsigned long long u64;
 108 typedef UINT32 u32;
 109 typedef UINT16 u16;
 110 typedef UINT8 u8;
 111 typedef long long s64;
 112 typedef INT32 s32;
 113 typedef INT16 s16;
 114 typedef INT8 s8;
 115 #define WPA_TYPES_DEFINED
 116 #endif /* __vxworks */
 117
 118 #ifdef CONFIG_TI_COMPILER
 119 #ifdef _LLONG_AVAILABLE
 120 typedef unsigned long long u64;
 121 #else
 122 /*
 123  * TODO: 64-bit variable not available. Using long as a workaround to test the
 124  * build, but this will likely not work for all operations.
 125  */
 126 typedef unsigned long u64;
 127 #endif
 128 typedef unsigned int u32;
 129 typedef unsigned short u16;
 130 typedef unsigned char u8;
 131 #define WPA_TYPES_DEFINED
 132 #endif /* CONFIG_TI_COMPILER */
 133
 134 #ifdef __SYMBIAN32__
 135 #define __REMOVE_PLATSEC_DIAGNOSTICS__
 136 #include <e32def.h>
 137 typedef TUint64 u64;
 138 typedef TUint32 u32;
 139 typedef TUint16 u16;
 140 typedef TUint8 u8;
 141 #define WPA_TYPES_DEFINED
 142 #endif /* __SYMBIAN32__ */
 143
 144 #ifndef WPA_TYPES_DEFINED
 145 #ifdef CONFIG_USE_INTTYPES_H
 146 #include <inttypes.h>
 147 #else
 148 #include <stdint.h>
 149 #endif
 150 typedef uint64_t u64;
 151 typedef uint32_t u32;
 152 typedef uint16_t u16;
 153 typedef uint8_t u8;
 154 typedef int64_t s64;
 155 typedef int32_t s32;
 156 typedef int16_t s16;
 157 typedef int8_t s8;
 158 #define WPA_TYPES_DEFINED
 159 #endif /* !WPA_TYPES_DEFINED */
 160
 161
 162 /* Define platform specific byte swapping macros */
 163
 164 #if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
 165
 166 static inline unsigned short wpa_swap_16(unsigned short v)
 167 {
 168         return ((v & 0xff) << 8) | (v >> 8);
 169 }
 170
 171 static inline unsigned int wpa_swap_32(unsigned int v)
 172 {
 173         return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
 174                 ((v & 0xff0000) >> 8) | (v >> 24);
 175 }
 176
 177 #define le_to_host16(n) (n)
 178 #define host_to_le16(n) (n)
 179 #define be_to_host16(n) wpa_swap_16(n)
 180 #define host_to_be16(n) wpa_swap_16(n)
 181 #define le_to_host32(n) (n)
 182 #define be_to_host32(n) wpa_swap_32(n)
 183 #define host_to_be32(n) wpa_swap_32(n)
 184
 185 #define WPA_BYTE_SWAP_DEFINED
 186
 187 #endif /* __CYGWIN__ || CONFIG_NATIVE_WINDOWS */
 188
 189
 190 #ifndef WPA_BYTE_SWAP_DEFINED
 191
 192 #ifndef __BYTE_ORDER
 193 #ifndef __LITTLE_ENDIAN
 194 #ifndef __BIG_ENDIAN
 195 #define __LITTLE_ENDIAN 1234
 196 #define __BIG_ENDIAN 4321
 197 #if defined(sparc)
 198 #define __BYTE_ORDER __BIG_ENDIAN
 199 #endif
 200 #endif /* __BIG_ENDIAN */
 201 #endif /* __LITTLE_ENDIAN */
 202 #endif /* __BYTE_ORDER */
 203
 204 #if __BYTE_ORDER == __LITTLE_ENDIAN
 205 #define le_to_host16(n) ((__force u16) (le16) (n))
 206 #define host_to_le16(n) ((__force le16) (u16) (n))
 207 #define be_to_host16(n) bswap_16((__force u16) (be16) (n))
 208 #define host_to_be16(n) ((__force be16) bswap_16((n)))
 209 #define le_to_host32(n) ((__force u32) (le32) (n))
 210 #define host_to_le32(n) ((__force le32) (u32) (n))
 211 #define be_to_host32(n) bswap_32((__force u32) (be32) (n))
 212 #define host_to_be32(n) ((__force be32) bswap_32((n)))
 213 #define le_to_host64(n) ((__force u64) (le64) (n))
 214 #define host_to_le64(n) ((__force le64) (u64) (n))
 215 #define be_to_host64(n) bswap_64((__force u64) (be64) (n))
 216 #define host_to_be64(n) ((__force be64) bswap_64((n)))
 217 #elif __BYTE_ORDER == __BIG_ENDIAN
 218 #define le_to_host16(n) bswap_16(n)
 219 #define host_to_le16(n) bswap_16(n)
 220 #define be_to_host16(n) (n)
 221 #define host_to_be16(n) (n)
 222 #define le_to_host32(n) bswap_32(n)
 223 #define be_to_host32(n) (n)
 224 #define host_to_be32(n) (n)
 225 #define le_to_host64(n) bswap_64(n)
 226 #define host_to_le64(n) bswap_64(n)
 227 #define be_to_host64(n) (n)
 228 #define host_to_be64(n) (n)
 229 #ifndef WORDS_BIGENDIAN
 230 #define WORDS_BIGENDIAN
 231 #endif
 232 #else
 233 #error Could not determine CPU byte order
 234 #endif
 235
 236 #define WPA_BYTE_SWAP_DEFINED
 237 #endif /* !WPA_BYTE_SWAP_DEFINED */
 238
 239
 240 /* Macros for handling unaligned memory accesses */
 241
 242 #define WPA_GET_BE16(a) ((u16) (((a)[0] << 8) | (a)[1]))
 243 #define WPA_PUT_BE16(a, val)                    \
 244         do {                                    \
 245                 (a)[0] = ((u16) (val)) >> 8;    \
 246                 (a)[1] = ((u16) (val)) & 0xff;  \
 247         } while (0)
 248
 249 #define WPA_GET_LE16(a) ((u16) (((a)[1] << 8) | (a)[0]))
 250 #define WPA_PUT_LE16(a, val)                    \
 251         do {                                    \
 252                 (a)[1] = ((u16) (val)) >> 8;    \
 253                 (a)[0] = ((u16) (val)) & 0xff;  \
 254         } while (0)
 255
 256 #define WPA_GET_BE24(a) ((((u32) (a)[0]) << 16) | (((u32) (a)[1]) << 8) | \
 257                          ((u32) (a)[2]))
 258 #define WPA_PUT_BE24(a, val)                                    \
 259         do {                                                    \
 260                 (a)[0] = (u8) ((((u32) (val)) >> 16) & 0xff);   \
 261                 (a)[1] = (u8) ((((u32) (val)) >> 8) & 0xff);    \
 262                 (a)[2] = (u8) (((u32) (val)) & 0xff);           \
 263         } while (0)
 264
 265 #define WPA_GET_BE32(a) ((((u32) (a)[0]) << 24) | (((u32) (a)[1]) << 16) | \
 266                          (((u32) (a)[2]) << 8) | ((u32) (a)[3]))
 267 #define WPA_PUT_BE32(a, val)                                    \
 268         do {                                                    \
 269                 (a)[0] = (u8) ((((u32) (val)) >> 24) & 0xff);   \
 270                 (a)[1] = (u8) ((((u32) (val)) >> 16) & 0xff);   \
 271                 (a)[2] = (u8) ((((u32) (val)) >> 8) & 0xff);    \
 272                 (a)[3] = (u8) (((u32) (val)) & 0xff);           \
 273         } while (0)
 274
 275 #define WPA_GET_LE32(a) ((((u32) (a)[3]) << 24) | (((u32) (a)[2]) << 16) | \
 276                          (((u32) (a)[1]) << 8) | ((u32) (a)[0]))
 277 #define WPA_PUT_LE32(a, val)                                    \
 278         do {                                                    \
 279                 (a)[3] = (u8) ((((u32) (val)) >> 24) & 0xff);   \
 280                 (a)[2] = (u8) ((((u32) (val)) >> 16) & 0xff);   \
 281                 (a)[1] = (u8) ((((u32) (val)) >> 8) & 0xff);    \
 282                 (a)[0] = (u8) (((u32) (val)) & 0xff);           \
 283         } while (0)
 284
 285 #define WPA_GET_BE64(a) ((((u64) (a)[0]) << 56) | (((u64) (a)[1]) << 48) | \
 286                          (((u64) (a)[2]) << 40) | (((u64) (a)[3]) << 32) | \
 287                          (((u64) (a)[4]) << 24) | (((u64) (a)[5]) << 16) | \
 288                          (((u64) (a)[6]) << 8) | ((u64) (a)[7]))
 289 #define WPA_PUT_BE64(a, val)                            \
 290         do {                                            \
 291                 (a)[0] = (u8) (((u64) (val)) >> 56);    \
 292                 (a)[1] = (u8) (((u64) (val)) >> 48);    \
 293                 (a)[2] = (u8) (((u64) (val)) >> 40);    \
 294                 (a)[3] = (u8) (((u64) (val)) >> 32);    \
 295                 (a)[4] = (u8) (((u64) (val)) >> 24);    \
 296                 (a)[5] = (u8) (((u64) (val)) >> 16);    \
 297                 (a)[6] = (u8) (((u64) (val)) >> 8);     \
 298                 (a)[7] = (u8) (((u64) (val)) & 0xff);   \
 299         } while (0)
 300
 301 #define WPA_GET_LE64(a) ((((u64) (a)[7]) << 56) | (((u64) (a)[6]) << 48) | \
 302                          (((u64) (a)[5]) << 40) | (((u64) (a)[4]) << 32) | \
 303                          (((u64) (a)[3]) << 24) | (((u64) (a)[2]) << 16) | \
 304                          (((u64) (a)[1]) << 8) | ((u64) (a)[0]))
 305
 306
 307 #ifndef ETH_ALEN
 308 #define ETH_ALEN 6
 309 #endif
 310
 311
 312 #ifdef __GNUC__
 313 #define PRINTF_FORMAT(a,b) __attribute__ ((format (printf, (a), (b))))
 314 #define STRUCT_PACKED __attribute__ ((packed))
 315 #else
 316 #define PRINTF_FORMAT(a,b)
 317 #define STRUCT_PACKED
 318 #endif
 319
 320
 321 #ifdef CONFIG_ANSI_C_EXTRA
 322
 323 #if !defined(_MSC_VER) || _MSC_VER < 1400
 324 /* snprintf - used in number of places; sprintf() is _not_ a good replacement
 325  * due to possible buffer overflow; see, e.g.,
 326  * http://www.ijs.si/software/snprintf/ for portable implementation of
 327  * snprintf. */
 328 int snprintf(char *str, size_t size, const char *format, ...);
 329
 330 /* vsnprintf - only used for wpa_msg() in wpa_supplicant.c */
 331 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
 332 #endif /* !defined(_MSC_VER) || _MSC_VER < 1400 */
 333
 334 /* getopt - only used in main.c */
 335 int getopt(int argc, char *const argv[], const char *optstring);
 336 extern char *optarg;
 337 extern int optind;
 338
 339 #ifndef CONFIG_NO_SOCKLEN_T_TYPEDEF
 340 #ifndef __socklen_t_defined
 341 typedef int socklen_t;
 342 #endif
 343 #endif
 344
 345 /* inline - define as __inline or just define it to be empty, if needed */
 346 #ifdef CONFIG_NO_INLINE
 347 #define inline
 348 #else
 349 #define inline __inline
 350 #endif
 351
 352 #ifndef __func__
 353 #define __func__ "__func__ not defined"
 354 #endif
 355
 356 #ifndef bswap_16
 357 #define bswap_16(a) ((((u16) (a) << 8) & 0xff00) | (((u16) (a) >> 8) & 0xff))
 358 #endif
 359
 360 #ifndef bswap_32
 361 #define bswap_32(a) ((((u32) (a) << 24) & 0xff000000) | \
 362                      (((u32) (a) << 8) & 0xff0000) | \
 363                      (((u32) (a) >> 8) & 0xff00) | \
 364                      (((u32) (a) >> 24) & 0xff))
 365 #endif
 366
 367 #ifndef MSG_DONTWAIT
 368 #define MSG_DONTWAIT 0
 369 #endif
 370
 371 #ifdef _WIN32_WCE
 372 void perror(const char *s);
 373 #endif /* _WIN32_WCE */
 374
 375 #endif /* CONFIG_ANSI_C_EXTRA */
 376
 377 #ifndef MAC2STR
 378 #define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
 379 #define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
 380 #endif
 381
 382 #ifndef BIT
 383 #define BIT(x) (1 << (x))
 384 #endif
 385
 386 /*
 387  * Definitions for sparse validation
 388  * (http://kernel.org/pub/linux/kernel/people/josh/sparse/)
 389  */
 390 #ifdef __CHECKER__
 391 #define __force __attribute__((force))
 392 #define __bitwise __attribute__((bitwise))
 393 #else
 394 #define __force
 395 #define __bitwise
 396 #endif
 397
 398 typedef u16 __bitwise be16;
 399 typedef u16 __bitwise le16;
 400 typedef u32 __bitwise be32;
 401 typedef u32 __bitwise le32;
 402 typedef u64 __bitwise be64;
 403 typedef u64 __bitwise le64;
 404
 405 #ifndef __must_check
 406 #if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
 407 #define __must_check __attribute__((__warn_unused_result__))
 408 #else
 409 #define __must_check
 410 #endif /* __GNUC__ */
 411 #endif /* __must_check */
 412
 413 int hwaddr_aton(const char *txt, u8 *addr);
 414 int hexstr2bin(const char *hex, u8 *buf, size_t len);
 415 void inc_byte_array(u8 *counter, size_t len);
 416 void wpa_get_ntp_timestamp(u8 *buf);
 417 int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
 418 int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
 419                                size_t len);
 420
 421 #ifdef CONFIG_NATIVE_WINDOWS
 422 void wpa_unicode2ascii_inplace(TCHAR *str);
 423 TCHAR * wpa_strdup_tchar(const char *str);
 424 #else /* CONFIG_NATIVE_WINDOWS */
 425 #define wpa_unicode2ascii_inplace(s) do { } while (0)
 426 #define wpa_strdup_tchar(s) strdup((s))
 427 #endif /* CONFIG_NATIVE_WINDOWS */
 428
 429 const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
 430
 431 static inline int is_zero_ether_addr(const u8 *a)
 432 {
 433         return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]);
 434 }
 435
 436 #include "wpa_debug.h"
 437
 438 #endif /* COMMON_H */