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  * @(#) $Header: /tcpdump/master/tcpdump/tcpdump-stdinc.h,v 1.18 2007-11-24 18:13:33 mcr Exp $ (LBL)
  33  */
  34
  35 /*
  36  * Include the appropriate OS header files on Windows and various flavors
  37  * of UNIX, and also define some additional items and include various
  38  * non-OS header files on Windows, and; this isolates most of the platform
  39  * differences to this one file.
  40  */
  41
  42 #ifndef tcpdump_stdinc_h
  43 #define tcpdump_stdinc_h
  44
  45 #ifdef WIN32
  46
  47 #include <stdio.h>
  48 #include <winsock2.h>
  49 #include <Ws2tcpip.h>
  50 #include "bittypes.h"
  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 NBBY
  59 #define NBBY    8
  60 #endif
  61
  62 #if !defined(__MINGW32__) && !defined(__WATCOMC__)
  63 #undef toascii
  64 #define isascii __isascii
  65 #define toascii __toascii
  66 #define stat _stat
  67 #define open _open
  68 #define fstat _fstat
  69 #define read _read
  70 #define close _close
  71 #define O_RDONLY _O_RDONLY
  72 #endif /* __MINGW32__ */
  73
  74 #ifdef __MINGW32__
  75 #include <stdint.h>
  76 #endif
  77
  78 /* Protos for missing/x.c functions (ideally <missing/addrinfo.h>
  79  * should be used, but it clashes with <ws2tcpip.h>).
  80  */
  81 extern const char *inet_ntop (int, const void *, char *, size_t);
  82 extern int inet_pton (int, const char *, void *);
  83 extern int inet_aton (const char *cp, struct in_addr *addr);
  84
  85 /*
  86  * With MSVC, for C, __inline is used to make a function an inline.
  87  */
  88 #ifdef _MSC_VER
  89 #define inline __inline
  90 #endif
  91
  92 #ifndef INET6_ADDRSTRLEN
  93 #define INET6_ADDRSTRLEN 46
  94 #endif
  95
  96 #ifndef toascii
  97 #define toascii(c) ((c) & 0x7f)
  98 #endif
  99
 100 #ifndef caddr_t
 101 typedef char* caddr_t;
 102 #endif /* caddr_t */
 103
 104 #define MAXHOSTNAMELEN  64
 105 #define NI_MAXHOST      1025
 106 #define snprintf _snprintf
 107 #define vsnprintf _vsnprintf
 108 #define RETSIGTYPE void
 109
 110 #else /* WIN32 */
 111
 112 #include <ctype.h>
 113 #include <unistd.h>
 114 #include <netdb.h>
 115 #if HAVE_INTTYPES_H
 116 #include <inttypes.h>
 117 #else
 118 #if HAVE_STDINT_H
 119 #include <stdint.h>
 120 #endif
 121 #endif
 122 #ifdef HAVE_SYS_BITYPES_H
 123 #include <sys/bitypes.h>
 124 #endif
 125 #include <sys/param.h>
 126 #include <sys/types.h>                  /* concession to AIX */
 127 #include <sys/time.h>
 128 #include <sys/socket.h>
 129 #include <netinet/in.h>
 130
 131 #ifdef TIME_WITH_SYS_TIME
 132 #include <time.h>
 133 #endif
 134
 135 #include <arpa/inet.h>
 136
 137 #endif /* WIN32 */
 138
 139 #ifndef HAVE___ATTRIBUTE__
 140 #define __attribute__(x)
 141 #endif
 142
 143 /*
 144  * Used to declare a structure unaligned, so that the C compiler,
 145  * if necessary, generates code that doesn't assume alignment.
 146  * This is required because there is no guarantee that the packet
 147  * data we get from libpcap/WinPcap is properly aligned.
 148  *
 149  * This assumes that, for all compilers that support __attribute__:
 150  *
 151  *      1) they support __attribute__((packed));
 152  *
 153  *      2) for all instruction set architectures requiring strict
 154  *         alignment, declaring a structure with that attribute
 155  *         causes the compiler to generate code that handles
 156  *         misaligned 2-byte, 4-byte, and 8-byte integral
 157  *         quantities.
 158  *
 159  * It does not (yet) handle compilers where you can get the compiler
 160  * to generate code of that sort by some other means.
 161  *
 162  * This is required in order to, for example, keep the compiler from
 163  * generating, for
 164  *
 165  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 166  *
 167  * in print-bootp.c, code that loads the first 4-byte word of a
 168  * "struct bootp", masking out the bp_hops field, and comparing the result
 169  * against 0x01010600.
 170  *
 171  * Note: this also requires that padding be put into the structure,
 172  * at least for compilers where it's implemented as __attribute__((packed)).
 173  */
 174 #if defined(_MSC_VER) && defined(UNALIGNED)
 175 /* MSVC may have its own macro defined with the same name and purpose. */
 176 #else
 177 #define UNALIGNED       __attribute__((packed))
 178 #endif
 179
 180 #if defined(WIN32) || defined(MSDOS)
 181   #define FOPEN_READ_TXT   "rt"
 182   #define FOPEN_READ_BIN   "rb"
 183   #define FOPEN_WRITE_TXT  "wt"
 184   #define FOPEN_WRITE_BIN  "wb"
 185 #else
 186   #define FOPEN_READ_TXT   "r"
 187   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 188   #define FOPEN_WRITE_TXT  "w"
 189   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 190 #endif
 191
 192 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 193   #undef ntohl
 194   #undef ntohs
 195   #undef htonl
 196   #undef htons
 197
 198   static __inline__ unsigned long __ntohl (unsigned long x);
 199   static __inline__ unsigned short __ntohs (unsigned short x);
 200
 201   #define ntohl(x)  __ntohl(x)
 202   #define ntohs(x)  __ntohs(x)
 203   #define htonl(x)  __ntohl(x)
 204   #define htons(x)  __ntohs(x)
 205
 206   static __inline__ unsigned long __ntohl (unsigned long x)
 207   {
 208     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 209              "rorl  $16, %0\n\t"    /* swap words        */
 210              "xchgb %b0, %h0"       /* swap higher bytes */
 211             : "=q" (x) : "0" (x));
 212     return (x);
 213   }
 214
 215   static __inline__ unsigned short __ntohs (unsigned short x)
 216   {
 217     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 218             : "=q" (x) : "0" (x));
 219     return (x);
 220   }
 221 #endif
 222
 223 #ifndef INET_ADDRSTRLEN
 224 #define INET_ADDRSTRLEN 16
 225 #endif
 226
 227 #ifndef TRUE
 228 #define TRUE 1
 229 #endif
 230
 231 #ifndef FALSE
 232 #define FALSE 0
 233 #endif
 234
 235 /*
 236  * The Apple deprecation workaround macros below were adopted from the
 237  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
 238  */
 239
 240 #define XSTRINGIFY(x) #x
 241
 242 /*
 243  *      Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
 244  */
 245 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
 246 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
 247
 248 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
 249 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
 250 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
 251 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 252 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
 253 #  else
 254 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 255 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
 256 #  endif
 257 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
 258 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
 259 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 260 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
 261 #else
 262 #  define DIAG_OFF(x)
 263 #  define DIAG_ON(x)
 264 #endif
 265
 266 /*
 267  *      For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
 268  */
 269 #ifdef __APPLE__
 270 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
 271 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
 272 #else
 273 #  define USES_APPLE_DEPRECATED_API
 274 #  define USES_APPLE_RST
 275 #endif
 276
 277 /*
 278  * end of Apple deprecation workaround macros
 279  */
 280
 281 #endif /* tcpdump_stdinc_h */