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599 lines
15 KiB
C
599 lines
15 KiB
C
/*
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* wpa_supplicant/hostapd / common helper functions, etc.
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* Copyright (c) 2002-2007, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*/
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#ifndef COMMON_H
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#define COMMON_H
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#include "os.h"
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#if defined(__linux__) || defined(__GLIBC__)
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#include <endian.h>
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#include <byteswap.h>
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#endif /* __linux__ */
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#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__DragonFly__) || \
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defined(__OpenBSD__)
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#include <sys/types.h>
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#include <sys/endian.h>
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#define __BYTE_ORDER _BYTE_ORDER
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#define __LITTLE_ENDIAN _LITTLE_ENDIAN
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#define __BIG_ENDIAN _BIG_ENDIAN
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#ifdef __OpenBSD__
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#define bswap_16 swap16
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#define bswap_32 swap32
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#define bswap_64 swap64
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#else /* __OpenBSD__ */
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#define bswap_16 bswap16
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#define bswap_32 bswap32
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#define bswap_64 bswap64
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#endif /* __OpenBSD__ */
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#endif /* defined(__FreeBSD__) || defined(__NetBSD__) ||
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* defined(__DragonFly__) || defined(__OpenBSD__) */
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#ifdef __APPLE__
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#include <sys/types.h>
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#include <machine/endian.h>
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#define __BYTE_ORDER _BYTE_ORDER
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#define __LITTLE_ENDIAN _LITTLE_ENDIAN
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#define __BIG_ENDIAN _BIG_ENDIAN
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static inline unsigned short bswap_16(unsigned short v)
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{
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return ((v & 0xff) << 8) | (v >> 8);
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}
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static inline unsigned int bswap_32(unsigned int v)
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{
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return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
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((v & 0xff0000) >> 8) | (v >> 24);
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}
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#endif /* __APPLE__ */
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#ifdef __rtems__
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#include <rtems/endian.h>
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#define __BYTE_ORDER BYTE_ORDER
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#define __LITTLE_ENDIAN LITTLE_ENDIAN
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#define __BIG_ENDIAN BIG_ENDIAN
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#define bswap_16 CPU_swap_u16
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#define bswap_32 CPU_swap_u32
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#endif /* __rtems__ */
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#ifdef CONFIG_NATIVE_WINDOWS
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#include <winsock.h>
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typedef int socklen_t;
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#ifndef MSG_DONTWAIT
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#define MSG_DONTWAIT 0 /* not supported */
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#endif
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#endif /* CONFIG_NATIVE_WINDOWS */
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#ifdef _MSC_VER
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#define inline __inline
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#undef vsnprintf
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#define vsnprintf _vsnprintf
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#undef close
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#define close closesocket
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#endif /* _MSC_VER */
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/* Define platform specific integer types */
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#ifdef _MSC_VER
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typedef UINT64 u64;
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typedef UINT32 u32;
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typedef UINT16 u16;
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typedef UINT8 u8;
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typedef INT64 s64;
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typedef INT32 s32;
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typedef INT16 s16;
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typedef INT8 s8;
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#define WPA_TYPES_DEFINED
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#endif /* _MSC_VER */
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#ifdef __vxworks
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typedef unsigned long long u64;
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typedef UINT32 u32;
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typedef UINT16 u16;
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typedef UINT8 u8;
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typedef long long s64;
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typedef INT32 s32;
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typedef INT16 s16;
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typedef INT8 s8;
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#define WPA_TYPES_DEFINED
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#endif /* __vxworks */
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#ifndef WPA_TYPES_DEFINED
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#ifdef CONFIG_USE_INTTYPES_H
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#include <inttypes.h>
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#else
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#include <stdint.h>
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#endif
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typedef uint64_t u64;
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typedef uint32_t u32;
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typedef uint16_t u16;
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typedef uint8_t u8;
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typedef int64_t s64;
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typedef int32_t s32;
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typedef int16_t s16;
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typedef int8_t s8;
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#define WPA_TYPES_DEFINED
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#endif /* !WPA_TYPES_DEFINED */
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/* Define platform specific byte swapping macros */
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#if defined(__CYGWIN__) || defined(CONFIG_NATIVE_WINDOWS)
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static inline unsigned short wpa_swap_16(unsigned short v)
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{
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return ((v & 0xff) << 8) | (v >> 8);
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}
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static inline unsigned int wpa_swap_32(unsigned int v)
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{
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return ((v & 0xff) << 24) | ((v & 0xff00) << 8) |
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((v & 0xff0000) >> 8) | (v >> 24);
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}
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#define le_to_host16(n) (n)
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#define host_to_le16(n) (n)
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#define be_to_host16(n) wpa_swap_16(n)
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#define host_to_be16(n) wpa_swap_16(n)
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#define le_to_host32(n) (n)
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#define host_to_le32(n) (n)
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#define be_to_host32(n) wpa_swap_32(n)
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#define host_to_be32(n) wpa_swap_32(n)
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#define host_to_le64(n) (n)
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#define WPA_BYTE_SWAP_DEFINED
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#endif /* __CYGWIN__ || CONFIG_NATIVE_WINDOWS */
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#ifndef WPA_BYTE_SWAP_DEFINED
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#ifndef __BYTE_ORDER
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#ifndef __LITTLE_ENDIAN
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#ifndef __BIG_ENDIAN
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#define __LITTLE_ENDIAN 1234
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#define __BIG_ENDIAN 4321
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#if defined(sparc)
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#define __BYTE_ORDER __BIG_ENDIAN
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#endif
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#endif /* __BIG_ENDIAN */
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#endif /* __LITTLE_ENDIAN */
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#endif /* __BYTE_ORDER */
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#if __BYTE_ORDER == __LITTLE_ENDIAN
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#define le_to_host16(n) ((__force u16) (le16) (n))
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#define host_to_le16(n) ((__force le16) (u16) (n))
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#define be_to_host16(n) bswap_16((__force u16) (be16) (n))
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#define host_to_be16(n) ((__force be16) bswap_16((n)))
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#define le_to_host32(n) ((__force u32) (le32) (n))
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#define host_to_le32(n) ((__force le32) (u32) (n))
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#define be_to_host32(n) bswap_32((__force u32) (be32) (n))
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#define host_to_be32(n) ((__force be32) bswap_32((n)))
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#define le_to_host64(n) ((__force u64) (le64) (n))
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#define host_to_le64(n) ((__force le64) (u64) (n))
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#define be_to_host64(n) bswap_64((__force u64) (be64) (n))
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#define host_to_be64(n) ((__force be64) bswap_64((n)))
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#elif __BYTE_ORDER == __BIG_ENDIAN
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#define le_to_host16(n) bswap_16(n)
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#define host_to_le16(n) bswap_16(n)
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#define be_to_host16(n) (n)
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#define host_to_be16(n) (n)
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#define le_to_host32(n) bswap_32(n)
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#define host_to_le32(n) bswap_32(n)
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#define be_to_host32(n) (n)
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#define host_to_be32(n) (n)
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#define le_to_host64(n) bswap_64(n)
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#define host_to_le64(n) bswap_64(n)
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#define be_to_host64(n) (n)
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#define host_to_be64(n) (n)
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#ifndef WORDS_BIGENDIAN
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#define WORDS_BIGENDIAN
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#endif
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#else
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#error Could not determine CPU byte order
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#endif
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#define WPA_BYTE_SWAP_DEFINED
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#endif /* !WPA_BYTE_SWAP_DEFINED */
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/* Macros for handling unaligned memory accesses */
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static inline u16 WPA_GET_BE16(const u8 *a)
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{
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return (a[0] << 8) | a[1];
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}
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static inline void WPA_PUT_BE16(u8 *a, u16 val)
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{
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a[0] = val >> 8;
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a[1] = val & 0xff;
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}
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static inline u16 WPA_GET_LE16(const u8 *a)
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{
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return (a[1] << 8) | a[0];
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}
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static inline void WPA_PUT_LE16(u8 *a, u16 val)
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{
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a[1] = val >> 8;
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a[0] = val & 0xff;
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}
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static inline u32 WPA_GET_BE24(const u8 *a)
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{
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return (a[0] << 16) | (a[1] << 8) | a[2];
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}
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static inline void WPA_PUT_BE24(u8 *a, u32 val)
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{
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a[0] = (val >> 16) & 0xff;
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a[1] = (val >> 8) & 0xff;
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a[2] = val & 0xff;
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}
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static inline u32 WPA_GET_BE32(const u8 *a)
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{
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return ((u32) a[0] << 24) | (a[1] << 16) | (a[2] << 8) | a[3];
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}
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static inline void WPA_PUT_BE32(u8 *a, u32 val)
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{
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a[0] = (val >> 24) & 0xff;
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a[1] = (val >> 16) & 0xff;
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a[2] = (val >> 8) & 0xff;
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a[3] = val & 0xff;
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}
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static inline u32 WPA_GET_LE32(const u8 *a)
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{
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return ((u32) a[3] << 24) | (a[2] << 16) | (a[1] << 8) | a[0];
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}
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static inline void WPA_PUT_LE32(u8 *a, u32 val)
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{
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a[3] = (val >> 24) & 0xff;
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a[2] = (val >> 16) & 0xff;
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a[1] = (val >> 8) & 0xff;
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a[0] = val & 0xff;
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}
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static inline u64 WPA_GET_BE64(const u8 *a)
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{
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return (((u64) a[0]) << 56) | (((u64) a[1]) << 48) |
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(((u64) a[2]) << 40) | (((u64) a[3]) << 32) |
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(((u64) a[4]) << 24) | (((u64) a[5]) << 16) |
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(((u64) a[6]) << 8) | ((u64) a[7]);
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}
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static inline void WPA_PUT_BE64(u8 *a, u64 val)
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{
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a[0] = val >> 56;
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a[1] = val >> 48;
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a[2] = val >> 40;
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a[3] = val >> 32;
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a[4] = val >> 24;
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a[5] = val >> 16;
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a[6] = val >> 8;
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a[7] = val & 0xff;
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}
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static inline u64 WPA_GET_LE64(const u8 *a)
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{
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return (((u64) a[7]) << 56) | (((u64) a[6]) << 48) |
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(((u64) a[5]) << 40) | (((u64) a[4]) << 32) |
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(((u64) a[3]) << 24) | (((u64) a[2]) << 16) |
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(((u64) a[1]) << 8) | ((u64) a[0]);
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}
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static inline void WPA_PUT_LE64(u8 *a, u64 val)
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{
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a[7] = val >> 56;
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a[6] = val >> 48;
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a[5] = val >> 40;
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a[4] = val >> 32;
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a[3] = val >> 24;
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a[2] = val >> 16;
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a[1] = val >> 8;
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a[0] = val & 0xff;
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}
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#ifndef ETH_ALEN
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#define ETH_ALEN 6
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#endif
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#ifndef ETH_HLEN
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#define ETH_HLEN 14
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#endif
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#ifndef IFNAMSIZ
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#define IFNAMSIZ 16
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#endif
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#ifndef ETH_P_ALL
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#define ETH_P_ALL 0x0003
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#endif
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#ifndef ETH_P_IP
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#define ETH_P_IP 0x0800
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#endif
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#ifndef ETH_P_80211_ENCAP
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#define ETH_P_80211_ENCAP 0x890d /* TDLS comes under this category */
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#endif
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#ifndef ETH_P_PAE
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#define ETH_P_PAE 0x888E /* Port Access Entity (IEEE 802.1X) */
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#endif /* ETH_P_PAE */
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#ifndef ETH_P_EAPOL
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#define ETH_P_EAPOL ETH_P_PAE
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#endif /* ETH_P_EAPOL */
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#ifndef ETH_P_RSN_PREAUTH
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#define ETH_P_RSN_PREAUTH 0x88c7
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#endif /* ETH_P_RSN_PREAUTH */
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#ifndef ETH_P_RRB
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#define ETH_P_RRB 0x890D
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#endif /* ETH_P_RRB */
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#ifndef ETH_P_OUI
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#define ETH_P_OUI 0x88B7
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#endif /* ETH_P_OUI */
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#ifndef ETH_P_8021Q
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#define ETH_P_8021Q 0x8100
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#endif /* ETH_P_8021Q */
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#ifdef __GNUC__
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#define PRINTF_FORMAT(a,b) __attribute__ ((format (printf, (a), (b))))
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#define STRUCT_PACKED __attribute__ ((packed))
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#else
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#define PRINTF_FORMAT(a,b)
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#define STRUCT_PACKED
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#endif
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#ifdef CONFIG_ANSI_C_EXTRA
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#if !defined(_MSC_VER) || _MSC_VER < 1400
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/* snprintf - used in number of places; sprintf() is _not_ a good replacement
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* due to possible buffer overflow; see, e.g.,
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* http://www.ijs.si/software/snprintf/ for portable implementation of
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* snprintf. */
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int snprintf(char *str, size_t size, const char *format, ...);
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/* vsnprintf - only used for wpa_msg() in wpa_supplicant.c */
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int vsnprintf(char *str, size_t size, const char *format, va_list ap);
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#endif /* !defined(_MSC_VER) || _MSC_VER < 1400 */
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/* getopt - only used in main.c */
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int getopt(int argc, char *const argv[], const char *optstring);
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extern char *optarg;
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extern int optind;
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#ifndef CONFIG_NO_SOCKLEN_T_TYPEDEF
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#ifndef __socklen_t_defined
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typedef int socklen_t;
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#endif
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#endif
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/* inline - define as __inline or just define it to be empty, if needed */
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#ifdef CONFIG_NO_INLINE
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#define inline
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#else
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#define inline __inline
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#endif
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#ifndef __func__
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#define __func__ "__func__ not defined"
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#endif
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#ifndef bswap_16
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#define bswap_16(a) ((((u16) (a) << 8) & 0xff00) | (((u16) (a) >> 8) & 0xff))
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#endif
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#ifndef bswap_32
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#define bswap_32(a) ((((u32) (a) << 24) & 0xff000000) | \
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(((u32) (a) << 8) & 0xff0000) | \
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(((u32) (a) >> 8) & 0xff00) | \
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(((u32) (a) >> 24) & 0xff))
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#endif
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#ifndef MSG_DONTWAIT
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#define MSG_DONTWAIT 0
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#endif
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#ifdef _WIN32_WCE
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void perror(const char *s);
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#endif /* _WIN32_WCE */
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#endif /* CONFIG_ANSI_C_EXTRA */
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#ifndef MAC2STR
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#define MAC2STR(a) (a)[0], (a)[1], (a)[2], (a)[3], (a)[4], (a)[5]
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#define MACSTR "%02x:%02x:%02x:%02x:%02x:%02x"
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/*
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* Compact form for string representation of MAC address
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* To be used, e.g., for constructing dbus paths for P2P Devices
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*/
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#define COMPACT_MACSTR "%02x%02x%02x%02x%02x%02x"
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#endif
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#ifndef BIT
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#define BIT(x) (1U << (x))
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#endif
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/*
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* Definitions for sparse validation
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* (http://kernel.org/pub/linux/kernel/people/josh/sparse/)
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*/
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#ifdef __CHECKER__
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#define __force __attribute__((force))
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#undef __bitwise
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#define __bitwise __attribute__((bitwise))
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#else
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#define __force
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#undef __bitwise
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#define __bitwise
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#endif
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typedef u16 __bitwise be16;
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typedef u16 __bitwise le16;
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typedef u32 __bitwise be32;
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typedef u32 __bitwise le32;
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typedef u64 __bitwise be64;
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typedef u64 __bitwise le64;
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#ifndef __must_check
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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#define __must_check __attribute__((__warn_unused_result__))
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#else
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#define __must_check
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#endif /* __GNUC__ */
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#endif /* __must_check */
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#ifndef __maybe_unused
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#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
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#define __maybe_unused __attribute__((unused))
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#else
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#define __maybe_unused
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#endif /* __GNUC__ */
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#endif /* __must_check */
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#define SSID_MAX_LEN 32
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struct wpa_ssid_value {
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u8 ssid[SSID_MAX_LEN];
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size_t ssid_len;
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};
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int hwaddr_aton(const char *txt, u8 *addr);
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int hwaddr_masked_aton(const char *txt, u8 *addr, u8 *mask, u8 maskable);
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int hwaddr_compact_aton(const char *txt, u8 *addr);
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int hwaddr_aton2(const char *txt, u8 *addr);
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int hex2byte(const char *hex);
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int hexstr2bin(const char *hex, u8 *buf, size_t len);
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void inc_byte_array(u8 *counter, size_t len);
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void buf_shift_right(u8 *buf, size_t len, size_t bits);
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void wpa_get_ntp_timestamp(u8 *buf);
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int wpa_scnprintf(char *buf, size_t size, const char *fmt, ...)
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PRINTF_FORMAT(3, 4);
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int wpa_snprintf_hex_sep(char *buf, size_t buf_size, const u8 *data, size_t len,
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char sep);
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int wpa_snprintf_hex(char *buf, size_t buf_size, const u8 *data, size_t len);
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int wpa_snprintf_hex_uppercase(char *buf, size_t buf_size, const u8 *data,
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size_t len);
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int hwaddr_mask_txt(char *buf, size_t len, const u8 *addr, const u8 *mask);
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int ssid_parse(const char *buf, struct wpa_ssid_value *ssid);
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#ifdef CONFIG_NATIVE_WINDOWS
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void wpa_unicode2ascii_inplace(TCHAR *str);
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TCHAR * wpa_strdup_tchar(const char *str);
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#else /* CONFIG_NATIVE_WINDOWS */
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#define wpa_unicode2ascii_inplace(s) do { } while (0)
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#define wpa_strdup_tchar(s) strdup((s))
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#endif /* CONFIG_NATIVE_WINDOWS */
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void printf_encode(char *txt, size_t maxlen, const u8 *data, size_t len);
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size_t printf_decode(u8 *buf, size_t maxlen, const char *str);
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const char * wpa_ssid_txt(const u8 *ssid, size_t ssid_len);
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char * wpa_config_parse_string(const char *value, size_t *len);
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int is_hex(const u8 *data, size_t len);
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int has_ctrl_char(const u8 *data, size_t len);
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int has_newline(const char *str);
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size_t merge_byte_arrays(u8 *res, size_t res_len,
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const u8 *src1, size_t src1_len,
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const u8 *src2, size_t src2_len);
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char * dup_binstr(const void *src, size_t len);
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static inline int is_zero_ether_addr(const u8 *a)
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{
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return !(a[0] | a[1] | a[2] | a[3] | a[4] | a[5]);
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}
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static inline int is_broadcast_ether_addr(const u8 *a)
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{
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return (a[0] & a[1] & a[2] & a[3] & a[4] & a[5]) == 0xff;
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}
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static inline int is_multicast_ether_addr(const u8 *a)
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{
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return a[0] & 0x01;
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}
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#define broadcast_ether_addr (const u8 *) "\xff\xff\xff\xff\xff\xff"
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#include "wpa_debug.h"
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struct wpa_freq_range_list {
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struct wpa_freq_range {
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unsigned int min;
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unsigned int max;
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} *range;
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unsigned int num;
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};
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int freq_range_list_parse(struct wpa_freq_range_list *res, const char *value);
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int freq_range_list_includes(const struct wpa_freq_range_list *list,
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unsigned int freq);
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char * freq_range_list_str(const struct wpa_freq_range_list *list);
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size_t int_array_len(const int *a);
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void int_array_concat(int **res, const int *a);
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void int_array_sort_unique(int *a);
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void int_array_add_unique(int **res, int a);
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#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
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void str_clear_free(char *str);
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void bin_clear_free(void *bin, size_t len);
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int random_mac_addr(u8 *addr);
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int random_mac_addr_keep_oui(u8 *addr);
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const char * cstr_token(const char *str, const char *delim, const char **last);
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char * str_token(char *str, const char *delim, char **context);
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size_t utf8_escape(const char *inp, size_t in_size,
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char *outp, size_t out_size);
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size_t utf8_unescape(const char *inp, size_t in_size,
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char *outp, size_t out_size);
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int is_ctrl_char(char c);
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int str_starts(const char *str, const char *start);
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u8 rssi_to_rcpi(int rssi);
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char * get_param(const char *cmd, const char *param);
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void forced_memzero(void *ptr, size_t len);
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/*
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* gcc 4.4 ends up generating strict-aliasing warnings about some very common
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* networking socket uses that do not really result in a real problem and
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* cannot be easily avoided with union-based type-punning due to struct
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* definitions including another struct in system header files. To avoid having
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* to fully disable strict-aliasing warnings, provide a mechanism to hide the
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* typecast from aliasing for now. A cleaner solution will hopefully be found
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* in the future to handle these cases.
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*/
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void * __hide_aliasing_typecast(void *foo);
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#define aliasing_hide_typecast(a,t) (t *) __hide_aliasing_typecast((a))
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#ifdef CONFIG_VALGRIND
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#include <valgrind/memcheck.h>
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#define WPA_MEM_DEFINED(ptr, len) VALGRIND_MAKE_MEM_DEFINED((ptr), (len))
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#else /* CONFIG_VALGRIND */
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#define WPA_MEM_DEFINED(ptr, len) do { } while (0)
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#endif /* CONFIG_VALGRIND */
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#endif /* COMMON_H */
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