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 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 snprintf _snprintf
 174 #define vsnprintf _vsnprintf
 175 #define RETSIGTYPE void
 176
 177 #else /* _WIN32 */
 178
 179 /*
 180  * Includes and definitions for various flavors of UN*X.
 181  */
 182
 183 #include <ctype.h>
 184 #include <unistd.h>
 185 #include <netdb.h>
 186 #if HAVE_INTTYPES_H
 187 #include <inttypes.h>
 188 #elif HAVE_STDINT_H
 189 #include <stdint.h>
 190 #endif
 191 #include <sys/param.h>
 192 #include <sys/types.h>                  /* concession to AIX */
 193 #include <sys/time.h>
 194 #include <sys/socket.h>
 195 #include <netinet/in.h>
 196
 197 #ifdef TIME_WITH_SYS_TIME
 198 #include <time.h>
 199 #endif
 200
 201 #include <arpa/inet.h>
 202
 203 #endif /* _WIN32 */
 204
 205 #ifndef HAVE___ATTRIBUTE__
 206 #define __attribute__(x)
 207 #endif
 208
 209 /*
 210  * Used to declare a structure unaligned, so that the C compiler,
 211  * if necessary, generates code that doesn't assume alignment.
 212  * This is required because there is no guarantee that the packet
 213  * data we get from libpcap/WinPcap is properly aligned.
 214  *
 215  * This assumes that, for all compilers that support __attribute__:
 216  *
 217  *      1) they support __attribute__((packed));
 218  *
 219  *      2) for all instruction set architectures requiring strict
 220  *         alignment, declaring a structure with that attribute
 221  *         causes the compiler to generate code that handles
 222  *         misaligned 2-byte, 4-byte, and 8-byte integral
 223  *         quantities.
 224  *
 225  * It does not (yet) handle compilers where you can get the compiler
 226  * to generate code of that sort by some other means.
 227  *
 228  * This is required in order to, for example, keep the compiler from
 229  * generating, for
 230  *
 231  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 232  *
 233  * in print-bootp.c, code that loads the first 4-byte word of a
 234  * "struct bootp", masking out the bp_hops field, and comparing the result
 235  * against 0x01010600.
 236  *
 237  * Note: this also requires that padding be put into the structure,
 238  * at least for compilers where it's implemented as __attribute__((packed)).
 239  */
 240 #if !(defined(_MSC_VER) && defined(UNALIGNED))
 241 /* MSVC may have its own macro defined with the same name and purpose. */
 242 #undef UNALIGNED
 243 #define UNALIGNED       __attribute__((packed))
 244 #endif
 245
 246 /*
 247  * fopen() read and write modes for text files and binary files.
 248  */
 249 #if defined(_WIN32) || defined(MSDOS)
 250   #define FOPEN_READ_TXT   "rt"
 251   #define FOPEN_READ_BIN   "rb"
 252   #define FOPEN_WRITE_TXT  "wt"
 253   #define FOPEN_WRITE_BIN  "wb"
 254 #else
 255   #define FOPEN_READ_TXT   "r"
 256   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 257   #define FOPEN_WRITE_TXT  "w"
 258   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 259 #endif
 260
 261 /*
 262  * Inline x86 assembler-language versions of ntoh[ls]() and hton[ls](),
 263  * defined if the OS doesn't provide them.  These assume no more than
 264  * an 80386, so, for example, it avoids the bswap instruction added in
 265  * the 80486.
 266  *
 267  * (We don't use them on OS X; Apple provides their own, which *doesn't*
 268  * avoid the bswap instruction, as OS X only supports machines that
 269  * have it.)
 270  */
 271 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 272   #undef ntohl
 273   #undef ntohs
 274   #undef htonl
 275   #undef htons
 276
 277   static __inline__ unsigned long __ntohl (unsigned long x);
 278   static __inline__ unsigned short __ntohs (unsigned short x);
 279
 280   #define ntohl(x)  __ntohl(x)
 281   #define ntohs(x)  __ntohs(x)
 282   #define htonl(x)  __ntohl(x)
 283   #define htons(x)  __ntohs(x)
 284
 285   static __inline__ unsigned long __ntohl (unsigned long x)
 286   {
 287     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 288              "rorl  $16, %0\n\t"    /* swap words        */
 289              "xchgb %b0, %h0"       /* swap higher bytes */
 290             : "=q" (x) : "0" (x));
 291     return (x);
 292   }
 293
 294   static __inline__ unsigned short __ntohs (unsigned short x)
 295   {
 296     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 297             : "=q" (x) : "0" (x));
 298     return (x);
 299   }
 300 #endif
 301
 302 /*
 303  * If the OS doesn't define AF_INET6 and struct in6_addr:
 304  *
 305  * define AF_INET6, so we can use it internally as a "this is an
 306  * IPv6 address" indication;
 307  *
 308  * define struct in6_addr so that we can use it for IPv6 addresses.
 309  */
 310 #ifndef HAVE_OS_IPV6_SUPPORT
 311 #define AF_INET6        24
 312
 313 struct in6_addr {
 314         union {
 315                 __uint8_t   __u6_addr8[16];
 316                 __uint16_t  __u6_addr16[8];
 317                 __uint32_t  __u6_addr32[4];
 318         } __u6_addr;                    /* 128-bit IP6 address */
 319 };
 320 #endif
 321
 322 #ifndef NI_MAXHOST
 323 #define NI_MAXHOST      1025
 324 #endif
 325
 326 #ifndef INET_ADDRSTRLEN
 327 #define INET_ADDRSTRLEN 16
 328 #endif
 329
 330 #ifndef TRUE
 331 #define TRUE 1
 332 #endif
 333
 334 #ifndef FALSE
 335 #define FALSE 0
 336 #endif
 337
 338 /*
 339  * The Apple deprecation workaround macros below were adopted from the
 340  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
 341  */
 342
 343 #define XSTRINGIFY(x) #x
 344
 345 /*
 346  *      Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
 347  */
 348 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
 349 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
 350
 351 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
 352 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
 353 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
 354 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 355 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
 356 #  else
 357 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 358 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
 359 #  endif
 360 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
 361 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
 362 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 363 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
 364 #else
 365 #  define DIAG_OFF(x)
 366 #  define DIAG_ON(x)
 367 #endif
 368
 369 /*
 370  *      For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
 371  */
 372 #ifdef __APPLE__
 373 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
 374 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
 375 #else
 376 #  define USES_APPLE_DEPRECATED_API
 377 #  define USES_APPLE_RST
 378 #endif
 379
 380 /*
 381  * end of Apple deprecation workaround macros
 382  */
 383
 384 #ifndef min
 385 #define min(a,b) ((a)>(b)?(b):(a))
 386 #endif
 387 #ifndef max
 388 #define max(a,b) ((b)>(a)?(b):(a))
 389 #endif
 390
 391 #endif /* netdissect_stdinc_h */