contrib/tcpdump/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
  73 typedef short ino_t;
  74 #endif /* __MINGW32__ */
  75
  76 #ifdef __MINGW32__
  77 #include <stdint.h>
  78 #endif
  79
  80 /* Protos for missing/x.c functions (ideally <missing/addrinfo.h>
  81  * should be used, but it clashes with <ws2tcpip.h>).
  82  */
  83 extern const char *inet_ntop (int, const void *, char *, size_t);
  84 extern int inet_pton (int, const char *, void *);
  85 extern int inet_aton (const char *cp, struct in_addr *addr);
  86
  87 #ifndef INET6_ADDRSTRLEN
  88 #define INET6_ADDRSTRLEN 46
  89 #endif
  90
  91 #ifndef toascii
  92 #define toascii(c) ((c) & 0x7f)
  93 #endif
  94
  95 #ifndef caddr_t
  96 typedef char* caddr_t;
  97 #endif /* caddr_t */
  98
  99 #define MAXHOSTNAMELEN  64
 100 #define NI_MAXHOST      1025
 101 #define snprintf _snprintf
 102 #define vsnprintf _vsnprintf
 103 #define RETSIGTYPE void
 104
 105 #else /* WIN32 */
 106
 107 #include <ctype.h>
 108 #include <unistd.h>
 109 #include <netdb.h>
 110 #if HAVE_INTTYPES_H
 111 #include <inttypes.h>
 112 #else
 113 #if HAVE_STDINT_H
 114 #include <stdint.h>
 115 #endif
 116 #endif
 117 #ifdef HAVE_SYS_BITYPES_H
 118 #include <sys/bitypes.h>
 119 #endif
 120 #include <sys/param.h>
 121 #include <sys/types.h>                  /* concession to AIX */
 122 #include <sys/time.h>
 123 #include <sys/socket.h>
 124 #include <netinet/in.h>
 125
 126 #ifdef TIME_WITH_SYS_TIME
 127 #include <time.h>
 128 #endif
 129
 130 #include <arpa/inet.h>
 131
 132 #endif /* WIN32 */
 133
 134 #ifndef HAVE___ATTRIBUTE__
 135 #define __attribute__(x)
 136 #endif
 137
 138 /*
 139  * Used to declare a structure unaligned, so that the C compiler,
 140  * if necessary, generates code that doesn't assume alignment.
 141  * This is required because there is no guarantee that the packet
 142  * data we get from libpcap/WinPcap is properly aligned.
 143  *
 144  * This assumes that, for all compilers that support __attribute__:
 145  *
 146  *      1) they support __attribute__((packed));
 147  *
 148  *      2) for all instruction set architectures requiring strict
 149  *         alignment, declaring a structure with that attribute
 150  *         causes the compiler to generate code that handles
 151  *         misaligned 2-byte, 4-byte, and 8-byte integral
 152  *         quantities.
 153  *
 154  * It does not (yet) handle compilers where you can get the compiler
 155  * to generate code of that sort by some other means.
 156  *
 157  * This is required in order to, for example, keep the compiler from
 158  * generating, for
 159  *
 160  *      if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
 161  *
 162  * in print-bootp.c, code that loads the first 4-byte word of a
 163  * "struct bootp", masking out the bp_hops field, and comparing the result
 164  * against 0x01010600.
 165  *
 166  * Note: this also requires that padding be put into the structure,
 167  * at least for compilers where it's implemented as __attribute__((packed)).
 168  */
 169 #define UNALIGNED       __attribute__((packed))
 170
 171 #if defined(WIN32) || defined(MSDOS)
 172   #define FOPEN_READ_TXT   "rt"
 173   #define FOPEN_READ_BIN   "rb"
 174   #define FOPEN_WRITE_TXT  "wt"
 175   #define FOPEN_WRITE_BIN  "wb"
 176 #else
 177   #define FOPEN_READ_TXT   "r"
 178   #define FOPEN_READ_BIN   FOPEN_READ_TXT
 179   #define FOPEN_WRITE_TXT  "w"
 180   #define FOPEN_WRITE_BIN  FOPEN_WRITE_TXT
 181 #endif
 182
 183 #if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
 184   #undef ntohl
 185   #undef ntohs
 186   #undef htonl
 187   #undef htons
 188
 189   static __inline__ unsigned long __ntohl (unsigned long x);
 190   static __inline__ unsigned short __ntohs (unsigned short x);
 191
 192   #define ntohl(x)  __ntohl(x)
 193   #define ntohs(x)  __ntohs(x)
 194   #define htonl(x)  __ntohl(x)
 195   #define htons(x)  __ntohs(x)
 196
 197   static __inline__ unsigned long __ntohl (unsigned long x)
 198   {
 199     __asm__ ("xchgb %b0, %h0\n\t"   /* swap lower bytes  */
 200              "rorl  $16, %0\n\t"    /* swap words        */
 201              "xchgb %b0, %h0"       /* swap higher bytes */
 202             : "=q" (x) : "0" (x));
 203     return (x);
 204   }
 205
 206   static __inline__ unsigned short __ntohs (unsigned short x)
 207   {
 208     __asm__ ("xchgb %b0, %h0"       /* swap bytes */
 209             : "=q" (x) : "0" (x));
 210     return (x);
 211   }
 212 #endif
 213
 214 #ifndef INET_ADDRSTRLEN
 215 #define INET_ADDRSTRLEN 16
 216 #endif
 217
 218 #ifndef TRUE
 219 #define TRUE 1
 220 #endif
 221
 222 #ifndef FALSE
 223 #define FALSE 0
 224 #endif
 225
 226 #endif /* tcpdump_stdinc_h */