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, and also define some additional items and include various
  35  * non-OS header files on Windows, and; this isolates most of the 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 <stdio.h>
  45 #include <winsock2.h>
  46 #include <Ws2tcpip.h>
  47 #include "bittypes.h"
  48 #include <ctype.h>
  49 #include <time.h>
  50 #include <io.h>
  51 #include <fcntl.h>
  52 #include <sys/types.h>
  53 #include <net/netdb.h>  /* in wpcap's Win32/include */
  54
  55 #ifndef NBBY
  56 #define NBBY    8
  57 #endif
  58
  59 #if !defined(__MINGW32__) && !defined(__WATCOMC__)
  60 #define stat _stat
  61 #define open _open
  62 #define fstat _fstat
  63 #define read _read
  64 #define close _close
  65 #define O_RDONLY _O_RDONLY
  66 #endif /* __MINGW32__ */
  67
  68 #ifdef __MINGW32__
  69 #include <stdint.h>
  70 #endif
  71
  72 /* Protos for missing/x.c functions (ideally <missing/addrinfo.h>
  73  * should be used, but it clashes with <ws2tcpip.h>).
  74  */
  75 extern const char *inet_ntop (int, const void *, char *, size_t);
  76 extern int inet_pton (int, const char *, void *);
  77 extern int inet_aton (const char *cp, struct in_addr *addr);
  78
  79 /*
  80  * With MSVC, for C, __inline is used to make a function an inline.
  81  */
  82 #ifdef _MSC_VER
  83 #define inline __inline
  84 #endif
  85
  86 #ifndef INET6_ADDRSTRLEN
  87 #define INET6_ADDRSTRLEN 46
  88 #endif
  89
  90 #ifndef caddr_t
  91 typedef char* caddr_t;
  92 #endif /* caddr_t */
  93
  94 #define MAXHOSTNAMELEN  64
  95 #define NI_MAXHOST      1025
  96 #define snprintf _snprintf
  97 #define vsnprintf _vsnprintf
  98 #define RETSIGTYPE void
  99
 100 #else /* WIN32 */
 101
 102 #include <ctype.h>
 103 #include <unistd.h>
 104 #include <netdb.h>
 105 #if HAVE_INTTYPES_H
 106 #include <inttypes.h>
 107 #elif HAVE_STDINT_H
 108 #include <stdint.h>
 109 #endif
 110 #include <sys/param.h>
 111 #include <sys/types.h>                  /* concession to AIX */
 112 #include <sys/time.h>
 113 #include <sys/socket.h>
 114 #include <netinet/in.h>
 115
 116 #ifdef TIME_WITH_SYS_TIME
 117 #include <time.h>
 118 #endif
 119
 120 #include <arpa/inet.h>
 121
 122 #endif /* WIN32 */
 123
 124 #ifndef HAVE___ATTRIBUTE__
 125 #define __attribute__(x)
 126 #endif
 127
 128 /*
 129  * Used to declare a structure unaligned, so that the C compiler,
 130  * if necessary, generates code that doesn't assume alignment.
 131  * This is required because there is no guarantee that the packet
 132  * data we get from libpcap/WinPcap is properly aligned.
 133  *
 134  * This assumes that, for all compilers that support __attribute__:
 135  *
 136  *      1) they support __attribute__((packed));
 137  *
 138  *      2) for all instruction set architectures requiring strict
 139  *         alignment, declaring a structure with that attribute
 140  *         causes the compiler to generate code that handles
 141  *         misaligned 2-byte, 4-byte, and 8-byte integral
 142  *         quantities.
 143  *
 144  * It does not (yet) handle compilers where you can get the compiler
 145  * to generate code of that sort by some other means.
 146  *
 147  * This is required in order to, for example, keep the compiler from
 148  * generating, for
 149  *
 150  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 151  *
 152  * in print-bootp.c, code that loads the first 4-byte word of a
 153  * "struct bootp", masking out the bp_hops field, and comparing the result
 154  * against 0x01010600.
 155  *
 156  * Note: this also requires that padding be put into the structure,
 157  * at least for compilers where it's implemented as __attribute__((packed)).
 158  */
 159 #if defined(_MSC_VER) && defined(UNALIGNED)
 160 /* MSVC may have its own macro defined with the same name and purpose. */
 161 #else
 162 #define UNALIGNED       __attribute__((packed))
 163 #endif
 164
 165 #if defined(WIN32) || defined(MSDOS)
 166   #define FOPEN_READ_TXT   "rt"
 167   #define FOPEN_READ_BIN   "rb"
 168   #define FOPEN_WRITE_TXT  "wt"
 169   #define FOPEN_WRITE_BIN  "wb"
 170 #else
 171   #define FOPEN_READ_TXT   "r"
 172   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 173   #define FOPEN_WRITE_TXT  "w"
 174   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 175 #endif
 176
 177 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 178   #undef ntohl
 179   #undef ntohs
 180   #undef htonl
 181   #undef htons
 182
 183   static __inline__ unsigned long __ntohl (unsigned long x);
 184   static __inline__ unsigned short __ntohs (unsigned short x);
 185
 186   #define ntohl(x)  __ntohl(x)
 187   #define ntohs(x)  __ntohs(x)
 188   #define htonl(x)  __ntohl(x)
 189   #define htons(x)  __ntohs(x)
 190
 191   static __inline__ unsigned long __ntohl (unsigned long x)
 192   {
 193     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 194              "rorl  $16, %0\n\t"    /* swap words        */
 195              "xchgb %b0, %h0"       /* swap higher bytes */
 196             : "=q" (x) : "0" (x));
 197     return (x);
 198   }
 199
 200   static __inline__ unsigned short __ntohs (unsigned short x)
 201   {
 202     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 203             : "=q" (x) : "0" (x));
 204     return (x);
 205   }
 206 #endif
 207
 208 #ifndef INET_ADDRSTRLEN
 209 #define INET_ADDRSTRLEN 16
 210 #endif
 211
 212 #ifndef TRUE
 213 #define TRUE 1
 214 #endif
 215
 216 #ifndef FALSE
 217 #define FALSE 0
 218 #endif
 219
 220 /*
 221  * The Apple deprecation workaround macros below were adopted from the
 222  * FreeRADIUS server code under permission of Alan DeKok and Arran Cudbard-Bell.
 223  */
 224
 225 #define XSTRINGIFY(x) #x
 226
 227 /*
 228  *      Macros for controlling warnings in GCC >= 4.2 and clang >= 2.8
 229  */
 230 #define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
 231 #define DIAG_DO_PRAGMA(x) _Pragma (#x)
 232
 233 #if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
 234 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
 235 #  if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
 236 #    define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 237 #    define DIAG_ON(x) DIAG_PRAGMA(pop)
 238 #  else
 239 #    define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 240 #    define DIAG_ON(x)  DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
 241 #  endif
 242 #elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
 243 #  define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
 244 #  define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
 245 #  define DIAG_ON(x) DIAG_PRAGMA(pop)
 246 #else
 247 #  define DIAG_OFF(x)
 248 #  define DIAG_ON(x)
 249 #endif
 250
 251 /*
 252  *      For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
 253  */
 254 #ifdef __APPLE__
 255 #  define USES_APPLE_DEPRECATED_API DIAG_OFF(deprecated-declarations)
 256 #  define USES_APPLE_RST DIAG_ON(deprecated-declarations)
 257 #else
 258 #  define USES_APPLE_DEPRECATED_API
 259 #  define USES_APPLE_RST
 260 #endif
 261
 262 /*
 263  * end of Apple deprecation workaround macros
 264  */
 265
 266 #ifndef min
 267 #define min(a,b) ((a)>(b)?(b):(a))
 268 #endif
 269 #ifndef max
 270 #define max(a,b) ((b)>(a)?(b):(a))
 271 #endif
 272
 273 #endif /* tcpdump_stdinc_h */