The Tcpdump Group git mirrors - tcpdump/blob - tcpdump-stdinc.h

   1 /*
   2  * Copyright (c) 2002 - 2003
   3  * NetGroup, Politecnico di Torino (Italy)
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  *
  10  * 1. Redistributions of source code must retain the above copyright
  11  * notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  * notice, this list of conditions and the following disclaimer in the
  14  * documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the Politecnico di Torino nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * Include the appropriate OS header files on Windows and various flavors
  34  * of UNIX, include various non-OS header files on Windows, and define
  35  * various items as needed, to isolate most of tcpdump's platform
  36  * differences to this one file.
  37  */
  38
  39 #ifndef tcpdump_stdinc_h
  40 #define tcpdump_stdinc_h
  41
  42 #include <errno.h>
  43
  44 #ifdef WIN32
  45
  46 #include <stdint.h>
  47 #include <stdio.h>
  48 #include <winsock2.h>
  49 #include <ws2tcpip.h>
  50 #include "bittypes.h"   /* in wpcap's Win32/include */
  51 #include <ctype.h>
  52 #include <time.h>
  53 #include <io.h>
  54 #include <fcntl.h>
  55 #include <sys/types.h>
  56 #include <net/netdb.h>  /* in wpcap's Win32/include */
  57
  58 #ifndef uint8_t
  59 #define uint8_t         unsigned char
  60 #endif
  61
  62 #ifndef int8_t
  63 #define int8_t          signed char
  64 #endif
  65
  66 #ifndef uint16_t
  67 #define uint16_t        unsigned short
  68 #endif
  69
  70 #ifndef int16_t
  71 #define int16_t         signed short
  72 #endif
  73
  74 #ifndef uint32_t
  75 #define uint32_t        unsigned int
  76 #endif
  77
  78 #ifndef int32_t
  79 #define int32_t         signed int
  80 #endif
  81
  82 #ifdef _MSC_EXTENSIONS
  83
  84 #ifndef uint64_t
  85 #define uint64_t        unsigned _int64
  86 #endif
  87
  88 #ifndef int64_t
  89 #define int64_t         _int64
  90 #endif
  91
  92 #ifndef PRId64
  93 #define PRId64          "I64d"
  94 #endif
  95
  96 #ifndef PRIo64
  97 #define PRIo64          "I64o"
  98 #endif
  99
 100 #ifndef PRIu64
 101 #define PRIu64          "I64u"
 102 #endif
 103
 104 #ifndef PRIx64
 105 #define PRIx64          "I64x"
 106 #endif
 107
 108 #else /* _MSC_EXTENSIONS */
 109
 110 #ifndef uint64_t
 111 #define uint64_t        unsigned long long
 112 #endif
 113
 114 #ifndef int64_t
 115 #define int64_t         long long
 116 #endif
 117
 118 #ifndef PRId64
 119 #define PRId64          "lld"
 120 #endif
 121
 122 #ifndef PRIo64
 123 #define PRIo64          "llo"
 124 #endif
 125
 126 #ifndef PRIu64
 127 #define PRIu64          "llu"
 128 #endif
 129
 130 #ifndef PRIx64
 131 #define PRIx64          "llx"
 132 #endif
 133
 134 #endif /* _MSC_EXTENSIONS */
 135
 136 #ifdef _MSC_VER
 137 #define stat _stat
 138 #define open _open
 139 #define fstat _fstat
 140 #define read _read
 141 #define close _close
 142 #define O_RDONLY _O_RDONLY
 143 #endif  /* _MSC_VER */
 144
 145 /* Protos for missing/x.c functions (ideally <missing/addrinfo.h>
 146  * should be used, but it clashes with <ws2tcpip.h>).
 147  */
 148 extern const char *inet_ntop (int, const void *, char *, size_t);
 149 extern int inet_pton (int, const char *, void *);
 150 extern int inet_aton (const char *cp, struct in_addr *addr);
 151
 152 /*
 153  * With MSVC, for C, __inline is used to make a function an inline.
 154  */
 155 #ifdef _MSC_VER
 156 #define inline __inline
 157 #endif
 158
 159 #ifndef INET6_ADDRSTRLEN
 160 #define INET6_ADDRSTRLEN 46
 161 #endif
 162
 163 /* It is in MSVC's <errno.h>, but not defined in MingW+Watcom.
 164  */
 165 #ifndef EAFNOSUPPORT
 166 #define EAFNOSUPPORT WSAEAFNOSUPPORT
 167 #endif
 168
 169 #ifndef caddr_t
 170 typedef char* caddr_t;
 171 #endif /* caddr_t */
 172
 173 #define MAXHOSTNAMELEN  64
 174 #define NI_MAXHOST      1025
 175 #define snprintf _snprintf
 176 #define vsnprintf _vsnprintf
 177 #define RETSIGTYPE void
 178
 179 #else /* WIN32 */
 180
 181 #include <ctype.h>
 182 #include <unistd.h>
 183 #include <netdb.h>
 184 #if HAVE_INTTYPES_H
 185 #include <inttypes.h>
 186 #elif HAVE_STDINT_H
 187 #include <stdint.h>
 188 #endif
 189 #include <sys/param.h>
 190 #include <sys/types.h>                  /* concession to AIX */
 191 #include <sys/time.h>
 192 #include <sys/socket.h>
 193 #include <netinet/in.h>
 194
 195 #ifdef TIME_WITH_SYS_TIME
 196 #include <time.h>
 197 #endif
 198
 199 #include <arpa/inet.h>
 200
 201 #endif /* WIN32 */
 202
 203 #ifndef HAVE___ATTRIBUTE__
 204 #define __attribute__(x)
 205 #endif
 206
 207 /*
 208  * Used to declare a structure unaligned, so that the C compiler,
 209  * if necessary, generates code that doesn't assume alignment.
 210  * This is required because there is no guarantee that the packet
 211  * data we get from libpcap/WinPcap is properly aligned.
 212  *
 213  * This assumes that, for all compilers that support __attribute__:
 214  *
 215  *      1) they support __attribute__((packed));
 216  *
 217  *      2) for all instruction set architectures requiring strict
 218  *         alignment, declaring a structure with that attribute
 219  *         causes the compiler to generate code that handles
 220  *         misaligned 2-byte, 4-byte, and 8-byte integral
 221  *         quantities.
 222  *
 223  * It does not (yet) handle compilers where you can get the compiler
 224  * to generate code of that sort by some other means.
 225  *
 226  * This is required in order to, for example, keep the compiler from
 227  * generating, for
 228  *
 229  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 230  *
 231  * in print-bootp.c, code that loads the first 4-byte word of a
 232  * "struct bootp", masking out the bp_hops field, and comparing the result
 233  * against 0x01010600.
 234  *
 235  * Note: this also requires that padding be put into the structure,
 236  * at least for compilers where it's implemented as __attribute__((packed)).
 237  */
 238 #if !(defined(_MSC_VER) && defined(UNALIGNED))
 239 /* MSVC may have its own macro defined with the same name and purpose. */
 240 #undef UNALIGNED
 241 #define UNALIGNED       __attribute__((packed))
 242 #endif
 243
 244 #if defined(WIN32) || defined(MSDOS)
 245   #define FOPEN_READ_TXT   "rt"
 246   #define FOPEN_READ_BIN   "rb"
 247   #define FOPEN_WRITE_TXT  "wt"
 248   #define FOPEN_WRITE_BIN  "wb"
 249 #else
 250   #define FOPEN_READ_TXT   "r"
 251   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 252   #define FOPEN_WRITE_TXT  "w"
 253   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 254 #endif
 255
 256 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 257   #undef ntohl
 258   #undef ntohs
 259   #undef htonl
 260   #undef htons
 261
 262   static __inline__ unsigned long __ntohl (unsigned long x);
 263   static __inline__ unsigned short __ntohs (unsigned short x);
 264
 265   #define ntohl(x)  __ntohl(x)
 266   #define ntohs(x)  __ntohs(x)
 267   #define htonl(x)  __ntohl(x)
 268   #define htons(x)  __ntohs(x)
 269
 270   static __inline__ unsigned long __ntohl (unsigned long x)
 271   {
 272     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 273              "rorl  $16, %0\n\t"    /* swap words        */
 274              "xchgb %b0, %h0"       /* swap higher bytes */
 275             : "=q" (x) : "0" (x));
 276     return (x);
 277   }
 278
 279   static __inline__ unsigned short __ntohs (unsigned short x)
 280   {
 281     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 282             : "=q" (x) : "0" (x));
 283     return (x);
 284   }
 285 #endif
 286
 287 #ifndef INET_ADDRSTRLEN
 288 #define INET_ADDRSTRLEN 16
 289 #endif
 290
 291 #ifndef TRUE
 292 #define TRUE 1
 293 #endif
 294
 295 #ifndef FALSE
 296 #define FALSE 0
 297 #endif
 298
 299 /*
 300  * The Apple deprecation workaround macros below were adopted from the
 301  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
 302  */
 303
 304 #define XSTRINGIFY(x) #x
 305
 306 /*
 307  *      Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
 308  */
 309 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
 310 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
 311
 312 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
 313 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
 314 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
 315 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 316 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
 317 #  else
 318 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 319 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
 320 #  endif
 321 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
 322 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
 323 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 324 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
 325 #else
 326 #  define DIAG_OFF(x)
 327 #  define DIAG_ON(x)
 328 #endif
 329
 330 /*
 331  *      For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
 332  */
 333 #ifdef __APPLE__
 334 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
 335 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
 336 #else
 337 #  define USES_APPLE_DEPRECATED_API
 338 #  define USES_APPLE_RST
 339 #endif
 340
 341 /*
 342  * end of Apple deprecation workaround macros
 343  */
 344
 345 #ifndef min
 346 #define min(a,b) ((a)>(b)?(b):(a))
 347 #endif
 348 #ifndef max
 349 #define max(a,b) ((b)>(a)?(b):(a))
 350 #endif
 351
 352 #endif /* tcpdump_stdinc_h */