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   1 /*
   2  * Copyright (c) 1993, 1995
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifndef TCPSLICE_H
  23 #define TCPSLICE_H
  24
  25 #include "compiler-tests.h"
  26
  27 #include "varattrs.h"
  28
  29 /*
  30  * If we're compiling with Visual Studio, make sure we have at least
  31  * VS 2015 or later, so we have sufficient C99 support.
  32  *
  33  * XXX - verify that we have at least C99 support on UN*Xes?
  34  *
  35  * What about MinGW or various DOS toolchains?  We're currently assuming
  36  * sufficient C99 support there.
  37  */
  38 #if defined(_MSC_VER)
  39   /*
  40    * Make sure we have VS 2015 or later.
  41    */
  42   #if _MSC_VER < 1900
  43     #error "Building tcpslice requires VS 2015 or later"
  44   #endif
  45 #endif
  46
  47 /*
  48  * Get the C99 types, and the PRI[doux]64 format strings, defined.
  49  */
  50 #ifdef HAVE_PCAP_PCAP_INTTYPES_H
  51   /*
  52    * We have pcap/pcap-inttypes.h; use that, as it'll do all the
  53    * work, and won't cause problems if a file includes this file
  54    * and later includes a pcap header file that also includes
  55    * pcap/pcap-inttypes.h.
  56    */
  57   #include <pcap/pcap-inttypes.h>
  58 #else
  59   /*
  60    * OK, we don't have pcap/pcap-inttypes.h, so we'll have to
  61    * do the work ourselves, but at least we don't have to
  62    * worry about other headers including it and causing
  63    * clashes.
  64    */
  65
  66   /*
  67    * Include <inttypes.h> to get the integer types and PRI[doux]64 values
  68    * defined.
  69    *
  70    * If the compiler is MSVC, we require VS 2015 or newer, so we
  71    * have <inttypes.h> - and support for %zu in the formatted
  72    * printing functions.
  73    *
  74    * If the compiler is MinGW, we assume we have <inttypes.h> - and
  75    * support for %zu in the formatted printing functions.
  76    *
  77    * If the target is UN*X, we assume we have a C99-or-later development
  78    * environment, and thus have <inttypes.h> - and support for %zu in
  79    * the formatted printing functions.
  80    *
  81    * If the target is MS-DOS, we assume we have <inttypes.h> - and support
  82    * for %zu in the formatted printing functions.
  83    */
  84   #include <inttypes.h>
  85
  86   #if defined(_MSC_VER)
  87     /*
  88      * Suppress definition of intN_t in bittypes.h, which might be included
  89      * by <pcap/pcap.h> in older versions of WinPcap.
  90      * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented.)
  91      */
  92     #define HAVE_U_INT8_T
  93     #define HAVE_U_INT16_T
  94     #define HAVE_U_INT32_T
  95     #define HAVE_U_INT64_T
  96   #endif
  97 #endif /* HAVE_PCAP_PCAP_INTTYPES_H */
  98
  99 #include <time.h>
 100 #include <sys/types.h>
 101 #include <sys/time.h>
 102 #include <pcap.h>
 103
 104 #define IS_LEAP_YEAR(year)      \
 105         ((year) % 4 == 0 && ((year) % 100 != 0 || (year) % 400 == 0))
 106
 107 /*
 108  * OpenBSD libpcap compensation: in struct pcap_pkthdr "ts" instead of struct
 109  * timeval uses struct bpf_timeval, which declares members with the same names
 110  * and a different type, which is a 32-bit unsigned, whilst on 64-bit systems
 111  * struct timeval uses a 64-bit integer type.
 112  */
 113 #define TIMEVAL_FROM_PKTHDR_TS(dst, src) { \
 114         (dst).tv_sec = (src).tv_sec; \
 115         (dst).tv_usec = (src).tv_usec; \
 116 }
 117
 118 extern const int days_in_month[];
 119 time_t                  gwtm2secs( const struct tm *tm );
 120
 121 int                     sf_find_end( struct pcap *p, const struct timeval *first_timestamp,
 122                                         struct timeval *last_timestamp );
 123 int                     sf_timestamp_less_than( const struct timeval *t1, const struct timeval *t2 );
 124 int                     sf_find_packet( struct pcap *p,
 125                                 struct timeval *min_time, int64_t min_pos,
 126                                 struct timeval *max_time, int64_t max_pos,
 127                                 const struct timeval *desired_time );
 128
 129 int                     fseek64(FILE *p, const int64_t offset, const int whence);
 130 int64_t                 ftell64(FILE *p);
 131 extern char *timestamp_to_string(const struct timeval *timestamp);
 132
 133 void                    error(const char *fmt, ...);
 134 void                    warning(const char *fmt, ...);
 135
 136 extern pcap_dumper_t    *global_dumper;
 137 #endif /* TCPSLICE_H */