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 #ifdef WIN32
  43
  44 #include <stdint.h>
  45 #include <stdio.h>
  46 #include <winsock2.h>
  47 #include <ws2tcpip.h>
  48 #include "bittypes.h"   /* in wpcap's Win32/include */
  49 #include <ctype.h>
  50 #include <time.h>
  51 #include <io.h>
  52 #include <errno.h>
  53 #include <fcntl.h>
  54 #include <sys/types.h>
  55 #include <net/netdb.h>  /* in wpcap's Win32/include */
  56
  57 #ifndef uint8_t
  58 #define uint8_t         unsigned char
  59 #endif
  60
  61 #ifndef int8_t
  62 #define int8_t          signed char
  63 #endif
  64
  65 #ifndef uint16_t
  66 #define uint16_t        unsigned short
  67 #endif
  68
  69 #ifndef int16_t
  70 #define int16_t         signed short
  71 #endif
  72
  73 #ifndef uint32_t
  74 #define uint32_t        unsigned int
  75 #endif
  76
  77 #ifndef int32_t
  78 #define int32_t         signed int
  79 #endif
  80
  81 #ifdef _MSC_EXTENSIONS
  82
  83 #ifndef uint64_t
  84 #define uint64_t        unsigned _int64
  85 #endif
  86
  87 #ifndef int64_t
  88 #define int64_t         _int64
  89 #endif
  90
  91 #ifndef PRId64
  92 #define PRId64          "I64d"
  93 #endif
  94
  95 #ifndef PRIo64
  96 #define PRIo64          "I64o"
  97 #endif
  98
  99 #ifndef PRIu64
 100 #define PRIu64          "I64u"
 101 #endif
 102
 103 #ifndef PRIx64
 104 #define PRIx64          "I64x"
 105 #endif
 106
 107 #else /* _MSC_EXTENSIONS */
 108
 109 #ifndef uint64_t
 110 #define uint64_t        unsigned long long
 111 #endif
 112
 113 #ifndef int64_t
 114 #define int64_t         long long
 115 #endif
 116
 117 #ifndef PRId64
 118 #define PRId64          "lld"
 119 #endif
 120
 121 #ifndef PRIo64
 122 #define PRIo64          "llo"
 123 #endif
 124
 125 #ifndef PRIu64
 126 #define PRIu64          "llu"
 127 #endif
 128
 129 #ifndef PRIx64
 130 #define PRIx64          "llx"
 131 #endif
 132
 133 #endif /* _MSC_EXTENSIONS */
 134
 135 #ifdef _MSC_VER
 136 #define stat _stat
 137 #define open _open
 138 #define fstat _fstat
 139 #define read _read
 140 #define close _close
 141 #define O_RDONLY _O_RDONLY
 142 #endif  /* _MSC_VER */
 143
 144 /* Protos for missing/x.c functions (ideally <missing/addrinfo.h>
 145  * should be used, but it clashes with <ws2tcpip.h>).
 146  */
 147 extern const char *inet_ntop (int, const void *, char *, size_t);
 148 extern int inet_pton (int, const char *, void *);
 149 extern int inet_aton (const char *cp, struct in_addr *addr);
 150
 151 /*
 152  * With MSVC, for C, __inline is used to make a function an inline.
 153  */
 154 #ifdef _MSC_VER
 155 #define inline __inline
 156 #endif
 157
 158 #ifndef INET6_ADDRSTRLEN
 159 #define INET6_ADDRSTRLEN 46
 160 #endif
 161
 162 /* It is in MSVC's <errno.h>, but not defined in MingW+Watcom.
 163  */
 164 #ifndef EAFNOSUPPORT
 165 #define EAFNOSUPPORT WSAEAFNOSUPPORT
 166 #endif
 167
 168 #ifndef caddr_t
 169 typedef char* caddr_t;
 170 #endif /* caddr_t */
 171
 172 #define MAXHOSTNAMELEN  64
 173 #define NI_MAXHOST      1025
 174 #define snprintf _snprintf
 175 #define vsnprintf _vsnprintf
 176 #define RETSIGTYPE void
 177
 178 #else /* WIN32 */
 179
 180 #include <ctype.h>
 181 #include <unistd.h>
 182 #include <netdb.h>
 183 #if HAVE_INTTYPES_H
 184 #include <inttypes.h>
 185 #elif HAVE_STDINT_H
 186 #include <stdint.h>
 187 #endif
 188 #include <sys/param.h>
 189 #include <sys/types.h>                  /* concession to AIX */
 190 #include <sys/time.h>
 191 #include <sys/socket.h>
 192 #include <netinet/in.h>
 193
 194 #ifdef TIME_WITH_SYS_TIME
 195 #include <time.h>
 196 #endif
 197
 198 #include <arpa/inet.h>
 199
 200 #endif /* WIN32 */
 201
 202 #ifndef HAVE___ATTRIBUTE__
 203 #define __attribute__(x)
 204 #endif
 205
 206 /*
 207  * Used to declare a structure unaligned, so that the C compiler,
 208  * if necessary, generates code that doesn't assume alignment.
 209  * This is required because there is no guarantee that the packet
 210  * data we get from libpcap/WinPcap is properly aligned.
 211  *
 212  * This assumes that, for all compilers that support __attribute__:
 213  *
 214  *      1) they support __attribute__((packed));
 215  *
 216  *      2) for all instruction set architectures requiring strict
 217  *         alignment, declaring a structure with that attribute
 218  *         causes the compiler to generate code that handles
 219  *         misaligned 2-byte, 4-byte, and 8-byte integral
 220  *         quantities.
 221  *
 222  * It does not (yet) handle compilers where you can get the compiler
 223  * to generate code of that sort by some other means.
 224  *
 225  * This is required in order to, for example, keep the compiler from
 226  * generating, for
 227  *
 228  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 229  *
 230  * in print-bootp.c, code that loads the first 4-byte word of a
 231  * "struct bootp", masking out the bp_hops field, and comparing the result
 232  * against 0x01010600.
 233  *
 234  * Note: this also requires that padding be put into the structure,
 235  * at least for compilers where it's implemented as __attribute__((packed)).
 236  */
 237 #if defined(__GNUC__)
 238 #undef UNALIGNED
 239 #define UNALIGNED       __attribute__((packed))
 240 #else
 241  /* MSVC may have its own macro defined with the same name and purpose. */
 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 */