#include "varattrs.h"
+/*
+ * If we're compiling with Visual Studio, make sure we have at least
+ * VS 2015 or later, so we have sufficient C99 support.
+ *
+ * XXX - verify that we have at least C99 support on UN*Xes?
+ *
+ * What about MinGW or various DOS toolchains? We're currently assuming
+ * sufficient C99 support there.
+ */
+#if defined(_MSC_VER)
+ /*
+ * Make sure we have VS 2015 or later.
+ */
+ #if _MSC_VER < 1900
+ #error "Building tcpdump requires VS 2015 or later"
+ #endif
+#endif
+
/*
* Get the C99 types, and the PRI[doux]64 format strings, defined.
*/
* worry about other headers including it and causing
* clashes.
*/
- #if defined(_MSC_VER)
- /*
- * Compiler is MSVC.
- */
- #if _MSC_VER >= 1800
- /*
- * VS 2013 or newer; we have <inttypes.h>.
- */
- #include <inttypes.h>
- #else
- /*
- * Earlier VS; we have to define this stuff ourselves.
- */
- typedef unsigned char uint8_t;
- typedef signed char int8_t;
- typedef unsigned short uint16_t;
- typedef signed short int16_t;
- typedef unsigned int uint32_t;
- typedef signed int int32_t;
- #ifdef _MSC_EXTENSIONS
- typedef unsigned _int64 uint64_t;
- typedef _int64 int64_t;
- #else /* _MSC_EXTENSIONS */
- typedef unsigned long long uint64_t;
- typedef long long int64_t;
- #endif
-
- /*
- * We have _strtoi64(). Use that for strtoint64_t().
- */
- #define strtoint64_t _strtoi64
- #endif
+ /*
+ * Include <inttypes.h> to get the integer types and PRi[doux]64 values
+ * defined.
+ *
+ * If the compiler is MSVC, we require VS 2015 or newer, so we
+ * have <inttypes.h> - and support for %zu in the formatted
+ * printing functions.
+ *
+ * If the compiler is MinGW, we assume we have <inttypes.h> - and
+ * support for %zu in the formatted printing functions.
+ *
+ * If the target is UN*X, we assume we have a C99-or-later development
+ * environment, and thus have <inttypes.h> - and support for %zu in
+ * the formatted printing functions.
+ *
+ * If the target is MS-DOS, we assume we have <inttypes.h> - and support
+ * for %zu in the formatted printing functions.
+ */
+ #include <inttypes.h>
+
+ #if defined(_MSC_VER)
/*
* Suppress definition of intN_t in bittypes.h, which might be included
* by <pcap/pcap.h> in older versions of WinPcap.
- * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented, and
- * we check for u_intN_t in the UN*X configure script.)
+ * (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented.)
*/
#define HAVE_U_INT8_T
#define HAVE_U_INT16_T
#define HAVE_U_INT32_T
#define HAVE_U_INT64_T
-
- /*
- * These may be defined by <inttypes.h>. If not, define them
- * ourselves.
- *
- * XXX - for MSVC, we always want the _MSC_EXTENSIONS versions.
- * What about other compilers? If, as the MinGW Web site says MinGW
- * does, the other compilers just use Microsoft's run-time library,
- * then they should probably use the _MSC_EXTENSIONS even if the
- * compiler doesn't define _MSC_EXTENSIONS.
- */
- #ifndef PRId64
- #ifdef _MSC_EXTENSIONS
- #define PRId64 "I64d"
- #else
- #define PRId64 "lld"
- #endif
- #endif /* PRId64 */
-
- #ifndef PRIo64
- #ifdef _MSC_EXTENSIONS
- #define PRIo64 "I64o"
- #else
- #define PRIo64 "llo"
- #endif
- #endif /* PRIo64 */
-
- #ifndef PRIx64
- #ifdef _MSC_EXTENSIONS
- #define PRIx64 "I64x"
- #else
- #define PRIx64 "llx"
- #endif
- #endif
-
- #ifndef PRIu64
- #ifdef _MSC_EXTENSIONS
- #define PRIu64 "I64u"
- #else
- #define PRIu64 "llu"
- #endif
- #endif
- #elif defined(__MINGW32__) || !defined(_WIN32)
- /*
- * Compiler is MinGW or target is UN*X or MS-DOS. Just use
- * <inttypes.h>.
- */
- #include <inttypes.h>
#endif
#endif /* HAVE_PCAP_PCAP_INTTYPES_H */
#include <stdio.h>
#include <winsock2.h>
#include <ws2tcpip.h>
-#include <ctype.h>
#include <time.h>
#include <io.h>
#include <fcntl.h>
#ifdef _MSC_VER
/*
* Compiler is MSVC.
+ *
+ * We require VS 2015 or newer, so we have strtoll(). Use that for
+ * strtoint64_t().
*/
- #if _MSC_VER >= 1800
- /*
- * VS 2013 or newer; we have strtoll(). Use that for strtoint64_t().
- */
- #define strtoint64_t strtoll
- #else
- /*
- * Earlier VS; we don't have strtoll(), but we do have
- * _strtoi64(). Use that for strtoint64_t().
- */
- #define strtoint64_t _strtoi64
- #endif
+ #define strtoint64_t strtoll
/*
- * Microsoft's documentation doesn't speak of LL as a valid
- * suffix for 64-bit integers, so we'll just use i64.
+ * And we have LL as a suffix for constants, so use that.
*/
- #define INT64_T_CONSTANT(constant) (constant##i64)
+ #define INT64_T_CONSTANT(constant) (constant##LL)
#else
/*
* Non-Microsoft compiler.
* by adding a preceding underscore; we *want* the UN*Xisms, so add
* #defines to let us use them.
*/
- #define isascii __isascii
+ #define isatty _isatty
#define stat _stat
#define strdup _strdup
#define open _open
- #define fstat _fstat
#define read _read
#define close _close
#define O_RDONLY _O_RDONLY
+ /*
+ * We define our_fstat64 as _fstati64, and define our_statb as
+ * struct _stati64, so we get 64-bit file sizes.
+ */
+ #define our_fstat _fstati64
+ #define our_statb struct _stati64
+
/*
* If <crtdbg.h> has been included, and _DEBUG is defined, and
* __STDC__ is zero, <crtdbg.h> will define strdup() to call
#ifndef strdup
#define strdup _strdup
#endif
+
+ /*
+ * Windows doesn't have ssize_t; routines such as _read() return int.
+ */
+ typedef int ssize_t;
#endif /* _MSC_VER */
/*
#endif /* caddr_t */
#define MAXHOSTNAMELEN 64
-#define snprintf _snprintf
-#define vsnprintf _vsnprintf
#else /* _WIN32 */
* Includes and definitions for various flavors of UN*X.
*/
-#include <ctype.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/param.h>
#include <arpa/inet.h>
+/*
+ * We should have large file support enabled, if it's available,
+ * so just use fstat as our_fstat and struct stat as our_statb.
+ */
+#define our_fstat fstat
+#define our_statb struct stat
+
/*
* Assume all UN*Xes have strtoll(), and use it for strtoint64_t().
*/
* Assume LL works.
*/
#define INT64_T_CONSTANT(constant) (constant##LL)
-
#endif /* _WIN32 */
/*
*/
#include "funcattrs.h"
-/*
- * On Windows, snprintf(), with that name and with C99 behavior - i.e.,
- * guaranteeing that the formatted string is null-terminated - didn't
- * appear until Visual Studio 2015. Prior to that, the C runtime had
- * only _snprintf(), which *doesn't* guarantee that the string is
- * null-terminated if it is truncated due to the buffer being too
- * small. We therefore can't just define snprintf to be _snprintf
- * and define vsnprintf to be _vsnprintf, as we're relying on null-
- * termination of strings in all cases.
- *
- * We also want to allow this to be built with versions of Visual Studio
- * prior to VS 2015, so we can't rely on snprintf() being present.
- *
- * And, if there are any UN*Xes out there on which we can run that
- * don't have snprintf() or don't have vsnprintf(), we define our
- * own as well.
- */
-#if !defined(HAVE_SNPRINTF)
-int snprintf (char *str, size_t sz, FORMAT_STRING(const char *format), ...)
- PRINTFLIKE(3, 4);
-#endif /* !defined(HAVE_SNPRINTF) */
-
-#if !defined(HAVE_VSNPRINTF)
-int vsnprintf (char *str, size_t sz, FORMAT_STRING(const char *format),
- va_list ap) PRINTFLIKE(3, 0);
-#endif /* !defined(HAVE_VSNPRINTF) */
-
/*
* fopen() read and write modes for text files and binary files.
*/
* it also implement __has_attribute() (for example, GCC 5.0 and later
* have __has_attribute(), and the "fallthrough" attribute was introduced
* in GCC 7).
+ *
+ * Unfortunately, Clang does this wrong - a statement
+ *
+ * __attribute__ ((fallthrough));
+ *
+ * produces bogus -Wmissing-declaration "declaration does not declare
+ * anything" warnings (dear Clang: that's not a declaration, it's an
+ * empty statement). GCC, however, has no trouble with this.
*/
-#if __has_attribute(fallthrough)
+#if __has_attribute(fallthrough) && !defined(__clang__)
# define ND_FALL_THROUGH __attribute__ ((fallthrough))
#else
# define ND_FALL_THROUGH
projects / tcpdump / blobdiff