The Tcpdump Group git mirrors - tcpdump/blob - netdissect-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 netdissect's platform
  36  * differences to this one file.
  37  */
  38
  39 #ifndef netdissect_stdinc_h
  40 #define netdissect_stdinc_h
  41
  42 #include <errno.h>
  43
  44 #ifdef _WIN32
  45
  46 /*
  47  * Includes and definitions for Windows.
  48  */
  49
  50 #include <stdint.h>
  51 #include <stdio.h>
  52 #include <winsock2.h>
  53 #include <ws2tcpip.h>
  54 #include "bittypes.h"   /* in wpcap's Win32/include */
  55 #include <ctype.h>
  56 #include <time.h>
  57 #include <io.h>
  58 #include <fcntl.h>
  59 #include <sys/types.h>
  60 #include <net/netdb.h>  /* in wpcap's Win32/include */
  61
  62 #ifndef uint8_t
  63 #define uint8_t         unsigned char
  64 #endif
  65
  66 #ifndef int8_t
  67 #define int8_t          signed char
  68 #endif
  69
  70 #ifndef uint16_t
  71 #define uint16_t        unsigned short
  72 #endif
  73
  74 #ifndef int16_t
  75 #define int16_t         signed short
  76 #endif
  77
  78 #ifndef uint32_t
  79 #define uint32_t        unsigned int
  80 #endif
  81
  82 #ifndef int32_t
  83 #define int32_t         signed int
  84 #endif
  85
  86 #ifdef _MSC_EXTENSIONS
  87
  88 #ifndef uint64_t
  89 #define uint64_t        unsigned _int64
  90 #endif
  91
  92 #ifndef int64_t
  93 #define int64_t         _int64
  94 #endif
  95
  96 #ifndef PRId64
  97 #define PRId64          "I64d"
  98 #endif
  99
 100 #ifndef PRIo64
 101 #define PRIo64          "I64o"
 102 #endif
 103
 104 #ifndef PRIu64
 105 #define PRIu64          "I64u"
 106 #endif
 107
 108 #ifndef PRIx64
 109 #define PRIx64          "I64x"
 110 #endif
 111
 112 #else /* _MSC_EXTENSIONS */
 113
 114 #ifndef uint64_t
 115 #define uint64_t        unsigned long long
 116 #endif
 117
 118 #ifndef int64_t
 119 #define int64_t         long long
 120 #endif
 121
 122 #ifndef PRId64
 123 #define PRId64          "lld"
 124 #endif
 125
 126 #ifndef PRIo64
 127 #define PRIo64          "llo"
 128 #endif
 129
 130 #ifndef PRIu64
 131 #define PRIu64          "llu"
 132 #endif
 133
 134 #ifndef PRIx64
 135 #define PRIx64          "llx"
 136 #endif
 137
 138 #endif /* _MSC_EXTENSIONS */
 139
 140 #ifdef _MSC_VER
 141 #define stat _stat
 142 #define open _open
 143 #define fstat _fstat
 144 #define read _read
 145 #define close _close
 146 #define O_RDONLY _O_RDONLY
 147 #endif  /* _MSC_VER */
 148
 149 /*
 150  * With MSVC, for C, __inline is used to make a function an inline.
 151  */
 152 #ifdef _MSC_VER
 153 #define inline __inline
 154 #endif
 155
 156 #ifndef INET6_ADDRSTRLEN
 157 #define INET6_ADDRSTRLEN 46
 158 #endif
 159
 160 /* It is in MSVC's <errno.h>, but not defined in MingW+Watcom.
 161  */
 162 #ifndef EAFNOSUPPORT
 163 #define EAFNOSUPPORT WSAEAFNOSUPPORT
 164 #endif
 165
 166 #ifndef caddr_t
 167 typedef char* caddr_t;
 168 #endif /* caddr_t */
 169
 170 #define MAXHOSTNAMELEN  64
 171 #define snprintf _snprintf
 172 #define vsnprintf _vsnprintf
 173 #define RETSIGTYPE void
 174
 175 #else /* _WIN32 */
 176
 177 /*
 178  * Includes and definitions for various flavors of UN*X.
 179  */
 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 /*
 245  * fopen() read and write modes for text files and binary files.
 246  */
 247 #if defined(_WIN32) || defined(MSDOS)
 248   #define FOPEN_READ_TXT   "rt"
 249   #define FOPEN_READ_BIN   "rb"
 250   #define FOPEN_WRITE_TXT  "wt"
 251   #define FOPEN_WRITE_BIN  "wb"
 252 #else
 253   #define FOPEN_READ_TXT   "r"
 254   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 255   #define FOPEN_WRITE_TXT  "w"
 256   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 257 #endif
 258
 259 /*
 260  * Inline x86 assembler-language versions of ntoh[ls]() and hton[ls](),
 261  * defined if the OS doesn't provide them.  These assume no more than
 262  * an 80386, so, for example, it avoids the bswap instruction added in
 263  * the 80486.
 264  *
 265  * (We don't use them on OS X; Apple provides their own, which *doesn't*
 266  * avoid the bswap instruction, as OS X only supports machines that
 267  * have it.)
 268  */
 269 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 270   #undef ntohl
 271   #undef ntohs
 272   #undef htonl
 273   #undef htons
 274
 275   static __inline__ unsigned long __ntohl (unsigned long x);
 276   static __inline__ unsigned short __ntohs (unsigned short x);
 277
 278   #define ntohl(x)  __ntohl(x)
 279   #define ntohs(x)  __ntohs(x)
 280   #define htonl(x)  __ntohl(x)
 281   #define htons(x)  __ntohs(x)
 282
 283   static __inline__ unsigned long __ntohl (unsigned long x)
 284   {
 285     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 286              "rorl  $16, %0\n\t"    /* swap words        */
 287              "xchgb %b0, %h0"       /* swap higher bytes */
 288             : "=q" (x) : "0" (x));
 289     return (x);
 290   }
 291
 292   static __inline__ unsigned short __ntohs (unsigned short x)
 293   {
 294     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 295             : "=q" (x) : "0" (x));
 296     return (x);
 297   }
 298 #endif
 299
 300 /*
 301  * If the OS doesn't define AF_INET6 and struct in6_addr:
 302  *
 303  * define AF_INET6, so we can use it internally as a "this is an
 304  * IPv6 address" indication;
 305  *
 306  * define struct in6_addr so that we can use it for IPv6 addresses.
 307  */
 308 #ifndef HAVE_OS_IPV6_SUPPORT
 309 #define AF_INET6        24
 310
 311 struct in6_addr {
 312         union {
 313                 __uint8_t   __u6_addr8[16];
 314                 __uint16_t  __u6_addr16[8];
 315                 __uint32_t  __u6_addr32[4];
 316         } __u6_addr;                    /* 128-bit IP6 address */
 317 };
 318 #endif
 319
 320 #ifndef NI_MAXHOST
 321 #define NI_MAXHOST      1025
 322 #endif
 323
 324 #ifndef INET_ADDRSTRLEN
 325 #define INET_ADDRSTRLEN 16
 326 #endif
 327
 328 #ifndef TRUE
 329 #define TRUE 1
 330 #endif
 331
 332 #ifndef FALSE
 333 #define FALSE 0
 334 #endif
 335
 336 /*
 337  * The Apple deprecation workaround macros below were adopted from the
 338  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
 339  */
 340
 341 #define XSTRINGIFY(x) #x
 342
 343 /*
 344  *      Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
 345  */
 346 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
 347 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
 348
 349 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
 350 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
 351 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
 352 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 353 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
 354 #  else
 355 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 356 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
 357 #  endif
 358 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
 359 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
 360 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 361 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
 362 #else
 363 #  define DIAG_OFF(x)
 364 #  define DIAG_ON(x)
 365 #endif
 366
 367 /*
 368  *      For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
 369  */
 370 #ifdef __APPLE__
 371 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
 372 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
 373 #else
 374 #  define USES_APPLE_DEPRECATED_API
 375 #  define USES_APPLE_RST
 376 #endif
 377
 378 /*
 379  * end of Apple deprecation workaround macros
 380  */
 381
 382 #ifndef min
 383 #define min(a,b) ((a)>(b)?(b):(a))
 384 #endif
 385 #ifndef max
 386 #define max(a,b) ((b)>(a)?(b):(a))
 387 #endif
 388
 389 #endif /* netdissect_stdinc_h */