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 <ctype.h>
  55 #include <time.h>
  56 #include <io.h>
  57 #include <fcntl.h>
  58 #include <sys/types.h>
  59
  60 #ifndef uint8_t
  61 #define uint8_t         unsigned char
  62 #endif
  63
  64 #ifndef int8_t
  65 #define int8_t          signed char
  66 #endif
  67
  68 #ifndef uint16_t
  69 #define uint16_t        unsigned short
  70 #endif
  71
  72 #ifndef int16_t
  73 #define int16_t         signed short
  74 #endif
  75
  76 #ifndef uint32_t
  77 #define uint32_t        unsigned int
  78 #endif
  79
  80 #ifndef int32_t
  81 #define int32_t         signed int
  82 #endif
  83
  84 #ifdef _MSC_EXTENSIONS
  85
  86 #ifndef uint64_t
  87 #define uint64_t        unsigned _int64
  88 #endif
  89
  90 #ifndef int64_t
  91 #define int64_t         _int64
  92 #endif
  93
  94 #ifndef PRId64
  95 #define PRId64          "I64d"
  96 #endif
  97
  98 #ifndef PRIo64
  99 #define PRIo64          "I64o"
 100 #endif
 101
 102 #ifndef PRIu64
 103 #define PRIu64          "I64u"
 104 #endif
 105
 106 #ifndef PRIx64
 107 #define PRIx64          "I64x"
 108 #endif
 109
 110 #else /* _MSC_EXTENSIONS */
 111
 112 #ifndef uint64_t
 113 #define uint64_t        unsigned long long
 114 #endif
 115
 116 #ifndef int64_t
 117 #define int64_t         long long
 118 #endif
 119
 120 #ifndef PRId64
 121 #define PRId64          "lld"
 122 #endif
 123
 124 #ifndef PRIo64
 125 #define PRIo64          "llo"
 126 #endif
 127
 128 #ifndef PRIu64
 129 #define PRIu64          "llu"
 130 #endif
 131
 132 #ifndef PRIx64
 133 #define PRIx64          "llx"
 134 #endif
 135
 136 #endif /* _MSC_EXTENSIONS */
 137
 138 /*
 139  * Suppress definition of intN_t in bittypes.h, as included by <pcap/pcap.h>
 140  * on Windows.
 141  * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented, and
 142  * we check for u_intN_t in the UN*X configure script.)
 143  */
 144 #define HAVE_U_INT8_T
 145 #define HAVE_U_INT16_T
 146 #define HAVE_U_INT32_T
 147 #define HAVE_U_INT64_T
 148
 149 #ifdef _MSC_VER
 150 #define stat _stat
 151 #define open _open
 152 #define read _read
 153 #define close _close
 154 #define O_RDONLY _O_RDONLY
 155
 156 /*
 157  * We define our_fstat64 as _fstati64, and define our_statb as
 158  * struct _stati64, so we get 64-bit file sizes.
 159  */
 160 #define our_fstat _fstati64
 161 #define our_statb struct _stati64
 162
 163 #endif  /* _MSC_VER */
 164
 165 /*
 166  * With MSVC, for C, __inline is used to make a function an inline.
 167  */
 168 #ifdef _MSC_VER
 169 #define inline __inline
 170 #endif
 171
 172 #ifdef AF_INET6
 173 #define HAVE_OS_IPV6_SUPPORT
 174 #endif
 175
 176 #ifndef INET6_ADDRSTRLEN
 177 #define INET6_ADDRSTRLEN 46
 178 #endif
 179
 180 /* It is in MSVC's <errno.h>, but not defined in MingW+Watcom.
 181  */
 182 #ifndef EAFNOSUPPORT
 183 #define EAFNOSUPPORT WSAEAFNOSUPPORT
 184 #endif
 185
 186 #ifndef caddr_t
 187 typedef char* caddr_t;
 188 #endif /* caddr_t */
 189
 190 #define MAXHOSTNAMELEN  64
 191 #define snprintf _snprintf
 192 #define vsnprintf _vsnprintf
 193 #define RETSIGTYPE void
 194
 195 #else /* _WIN32 */
 196
 197 /*
 198  * Includes and definitions for various flavors of UN*X.
 199  */
 200
 201 #include <ctype.h>
 202 #include <unistd.h>
 203 #include <netdb.h>
 204 #if HAVE_INTTYPES_H
 205 #include <inttypes.h>
 206 #elif HAVE_STDINT_H
 207 #include <stdint.h>
 208 #endif
 209 #include <sys/param.h>
 210 #include <sys/types.h>                  /* concession to AIX */
 211 #include <sys/time.h>
 212 #include <sys/socket.h>
 213 #include <netinet/in.h>
 214
 215 #ifdef TIME_WITH_SYS_TIME
 216 #include <time.h>
 217 #endif
 218
 219 #include <arpa/inet.h>
 220
 221 /*
 222  * We should have large file support enabled, if it's available,
 223  * so just use fstat as our_fstat and struct stat as our_statb.
 224  */
 225 #define our_fstat fstat
 226 #define our_statb struct stat
 227
 228 #endif /* _WIN32 */
 229
 230 #ifndef HAVE___ATTRIBUTE__
 231 #define __attribute__(x)
 232 #endif
 233
 234 /*
 235  * Used to declare a structure unaligned, so that the C compiler,
 236  * if necessary, generates code that doesn't assume alignment.
 237  * This is required because there is no guarantee that the packet
 238  * data we get from libpcap/WinPcap is properly aligned.
 239  *
 240  * This assumes that, for all compilers that support __attribute__:
 241  *
 242  *      1) they support __attribute__((packed));
 243  *
 244  *      2) for all instruction set architectures requiring strict
 245  *         alignment, declaring a structure with that attribute
 246  *         causes the compiler to generate code that handles
 247  *         misaligned 2-byte, 4-byte, and 8-byte integral
 248  *         quantities.
 249  *
 250  * It does not (yet) handle compilers where you can get the compiler
 251  * to generate code of that sort by some other means.
 252  *
 253  * This is required in order to, for example, keep the compiler from
 254  * generating, for
 255  *
 256  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 257  *
 258  * in print-bootp.c, code that loads the first 4-byte word of a
 259  * "struct bootp", masking out the bp_hops field, and comparing the result
 260  * against 0x01010600.
 261  *
 262  * Note: this also requires that padding be put into the structure,
 263  * at least for compilers where it's implemented as __attribute__((packed)).
 264  */
 265 #if !(defined(_MSC_VER) && defined(UNALIGNED))
 266 /* MSVC may have its own macro defined with the same name and purpose. */
 267 #undef UNALIGNED
 268 #define UNALIGNED       __attribute__((packed))
 269 #endif
 270
 271 /*
 272  * fopen() read and write modes for text files and binary files.
 273  */
 274 #if defined(_WIN32) || defined(MSDOS)
 275   #define FOPEN_READ_TXT   "rt"
 276   #define FOPEN_READ_BIN   "rb"
 277   #define FOPEN_WRITE_TXT  "wt"
 278   #define FOPEN_WRITE_BIN  "wb"
 279 #else
 280   #define FOPEN_READ_TXT   "r"
 281   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 282   #define FOPEN_WRITE_TXT  "w"
 283   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 284 #endif
 285
 286 /*
 287  * Inline x86 assembler-language versions of ntoh[ls]() and hton[ls](),
 288  * defined if the OS doesn't provide them.  These assume no more than
 289  * an 80386, so, for example, it avoids the bswap instruction added in
 290  * the 80486.
 291  *
 292  * (We don't use them on OS X; Apple provides their own, which *doesn't*
 293  * avoid the bswap instruction, as OS X only supports machines that
 294  * have it.)
 295  */
 296 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 297   #undef ntohl
 298   #undef ntohs
 299   #undef htonl
 300   #undef htons
 301
 302   static __inline__ unsigned long __ntohl (unsigned long x);
 303   static __inline__ unsigned short __ntohs (unsigned short x);
 304
 305   #define ntohl(x)  __ntohl(x)
 306   #define ntohs(x)  __ntohs(x)
 307   #define htonl(x)  __ntohl(x)
 308   #define htons(x)  __ntohs(x)
 309
 310   static __inline__ unsigned long __ntohl (unsigned long x)
 311   {
 312     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 313              "rorl  $16, %0\n\t"    /* swap words        */
 314              "xchgb %b0, %h0"       /* swap higher bytes */
 315             : "=q" (x) : "0" (x));
 316     return (x);
 317   }
 318
 319   static __inline__ unsigned short __ntohs (unsigned short x)
 320   {
 321     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 322             : "=q" (x) : "0" (x));
 323     return (x);
 324   }
 325 #endif
 326
 327 /*
 328  * If the OS doesn't define AF_INET6 and struct in6_addr:
 329  *
 330  * define AF_INET6, so we can use it internally as a "this is an
 331  * IPv6 address" indication;
 332  *
 333  * define struct in6_addr so that we can use it for IPv6 addresses.
 334  */
 335 #ifndef HAVE_OS_IPV6_SUPPORT
 336 #ifndef AF_INET6
 337 #define AF_INET6        24
 338
 339 struct in6_addr {
 340         union {
 341                 __uint8_t   __u6_addr8[16];
 342                 __uint16_t  __u6_addr16[8];
 343                 __uint32_t  __u6_addr32[4];
 344         } __u6_addr;                    /* 128-bit IP6 address */
 345 };
 346 #endif
 347 #endif
 348
 349 #ifndef NI_MAXHOST
 350 #define NI_MAXHOST      1025
 351 #endif
 352
 353 #ifndef INET_ADDRSTRLEN
 354 #define INET_ADDRSTRLEN 16
 355 #endif
 356
 357 #ifndef TRUE
 358 #define TRUE 1
 359 #endif
 360
 361 #ifndef FALSE
 362 #define FALSE 0
 363 #endif
 364
 365 /*
 366  * The Apple deprecation workaround macros below were adopted from the
 367  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
 368  */
 369
 370 #define XSTRINGIFY(x) #x
 371
 372 /*
 373  *      Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
 374  */
 375 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
 376 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
 377
 378 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
 379 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
 380 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
 381 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 382 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
 383 #  else
 384 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 385 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
 386 #  endif
 387 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
 388 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
 389 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 390 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
 391 #else
 392 #  define DIAG_OFF(x)
 393 #  define DIAG_ON(x)
 394 #endif
 395
 396 /*
 397  *      For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
 398  */
 399 #ifdef __APPLE__
 400 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
 401 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
 402 #else
 403 #  define USES_APPLE_DEPRECATED_API
 404 #  define USES_APPLE_RST
 405 #endif
 406
 407 /*
 408  * end of Apple deprecation workaround macros
 409  */
 410
 411 /*
 412  * Function attributes, for various compilers.
 413  */
 414 #include "funcattrs.h"
 415
 416 #ifndef min
 417 #define min(a,b) ((a)>(b)?(b):(a))
 418 #endif
 419 #ifndef max
 420 #define max(a,b) ((b)>(a)?(b):(a))
 421 #endif
 422
 423 #endif /* netdissect_stdinc_h */