#include <errno.h>
+#include "compiler-tests.h"
+
+#include "varattrs.h"
+
+/*
+ * Get the C99 types, and the PRI[doux]64 format strings, defined.
+ */
+#ifdef HAVE_PCAP_PCAP_INTTYPES_H
+ /*
+ * We have pcap/pcap-inttypes.h; use that, as it'll do all the
+ * work, and won't cause problems if a file includes this file
+ * and later includes a pcap header file that also includes
+ * pcap/pcap-inttypes.h.
+ */
+ #include <pcap/pcap-inttypes.h>
+#else
+ /*
+ * OK, we don't have pcap/pcap-inttypes.h, so we'll have to
+ * do the work ourselves, but at least we don't have to
+ * 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
+
+ /*
+ * 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.)
+ */
+ #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 */
+
#ifdef _WIN32
/*
* Includes and definitions for Windows.
*/
-#include <stdint.h>
#include <stdio.h>
#include <winsock2.h>
#include <ws2tcpip.h>
#include <fcntl.h>
#include <sys/types.h>
-#ifndef uint8_t
-#define uint8_t unsigned char
-#endif
-
-#ifndef int8_t
-#define int8_t signed char
-#endif
-
-#ifndef uint16_t
-#define uint16_t unsigned short
-#endif
-
-#ifndef int16_t
-#define int16_t signed short
-#endif
-
-#ifndef uint32_t
-#define uint32_t unsigned int
-#endif
-
-#ifndef int32_t
-#define int32_t signed int
-#endif
-
-#ifdef _MSC_EXTENSIONS
-
-#ifndef uint64_t
-#define uint64_t unsigned _int64
-#endif
-
-#ifndef int64_t
-#define int64_t _int64
-#endif
-
-#ifndef PRId64
-#define PRId64 "I64d"
-#endif
-
-#ifndef PRIo64
-#define PRIo64 "I64o"
-#endif
-
-#ifndef PRIu64
-#define PRIu64 "I64u"
-#endif
-
-#ifndef PRIx64
-#define PRIx64 "I64x"
-#endif
-
-#else /* _MSC_EXTENSIONS */
-
-#ifndef uint64_t
-#define uint64_t unsigned long long
-#endif
-
-#ifndef int64_t
-#define int64_t long long
-#endif
-
-#ifndef PRId64
-#define PRId64 "lld"
-#endif
-
-#ifndef PRIo64
-#define PRIo64 "llo"
-#endif
-
-#ifndef PRIu64
-#define PRIu64 "llu"
-#endif
+#ifdef _MSC_VER
+ /*
+ * Compiler is MSVC.
+ */
+ #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
+
+ /*
+ * Microsoft's documentation doesn't speak of LL as a valid
+ * suffix for 64-bit integers, so we'll just use i64.
+ */
+ #define INT64_T_CONSTANT(constant) (constant##i64)
+#else
+ /*
+ * Non-Microsoft compiler.
+ *
+ * XXX - should we use strtoll or should we use _strtoi64()?
+ */
+ #define strtoint64_t strtoll
-#ifndef PRIx64
-#define PRIx64 "llx"
+ /*
+ * Assume LL works.
+ */
+ #define INT64_T_CONSTANT(constant) (constant##LL)
#endif
-#endif /* _MSC_EXTENSIONS */
-
-/*
- * Suppress definition of intN_t in bittypes.h, as included by <pcap/pcap.h>
- * on Windows.
- * (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.)
- */
-#define HAVE_U_INT8_T
-#define HAVE_U_INT16_T
-#define HAVE_U_INT32_T
-#define HAVE_U_INT64_T
-
#ifdef _MSC_VER
-#define stat _stat
-#define open _open
-#define fstat _fstat
-#define read _read
-#define close _close
-#define O_RDONLY _O_RDONLY
+ #define stat _stat
+ #define strdup _strdup
+ #define open _open
+ #define fstat _fstat
+ #define read _read
+ #define close _close
+ #define O_RDONLY _O_RDONLY
+
+ /*
+ * If <crtdbg.h> has been included, and _DEBUG is defined, and
+ * __STDC__ is zero, <crtdbg.h> will define strdup() to call
+ * _strdup_dbg(). So if it's already defined, don't redefine
+ * it.
+ */
+ #ifndef strdup
+ #define strdup _strdup
+ #endif
#endif /* _MSC_VER */
/*
#define inline __inline
#endif
-#ifdef AF_INET6
+#if defined(AF_INET6) && !defined(HAVE_OS_IPV6_SUPPORT)
#define HAVE_OS_IPV6_SUPPORT
#endif
#define MAXHOSTNAMELEN 64
#define snprintf _snprintf
#define vsnprintf _vsnprintf
-#define RETSIGTYPE void
#else /* _WIN32 */
#include <ctype.h>
#include <unistd.h>
#include <netdb.h>
-#if HAVE_INTTYPES_H
-#include <inttypes.h>
-#elif HAVE_STDINT_H
-#include <stdint.h>
-#endif
#include <sys/param.h>
#include <sys/types.h> /* concession to AIX */
#include <sys/time.h>
#include <sys/socket.h>
#include <netinet/in.h>
-#ifdef TIME_WITH_SYS_TIME
#include <time.h>
-#endif
#include <arpa/inet.h>
+/*
+ * Assume all UN*Xes have strtoll(), and use it for strtoint64_t().
+ */
+#define strtoint64_t strtoll
+
+/*
+ * Assume LL works.
+ */
+#define INT64_T_CONSTANT(constant) (constant##LL)
+
#endif /* _WIN32 */
-#ifndef HAVE___ATTRIBUTE__
-#define __attribute__(x)
-#endif
+/*
+ * Function attributes, for various compilers.
+ */
+#include "funcattrs.h"
/*
- * Used to declare a structure unaligned, so that the C compiler,
- * if necessary, generates code that doesn't assume alignment.
- * This is required because there is no guarantee that the packet
- * data we get from libpcap/WinPcap is properly aligned.
- *
- * This assumes that, for all compilers that support __attribute__:
- *
- * 1) they support __attribute__((packed));
- *
- * 2) for all instruction set architectures requiring strict
- * alignment, declaring a structure with that attribute
- * causes the compiler to generate code that handles
- * misaligned 2-byte, 4-byte, and 8-byte integral
- * quantities.
+ * 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.
*
- * It does not (yet) handle compilers where you can get the compiler
- * to generate code of that sort by some other means.
+ * 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.
*
- * This is required in order to, for example, keep the compiler from
- * generating, for
- *
- * if (bp->bp_htype == 1 && bp->bp_hlen == 6 && bp->bp_op == BOOTPREQUEST) {
- *
- * in print-bootp.c, code that loads the first 4-byte word of a
- * "struct bootp", masking out the bp_hops field, and comparing the result
- * against 0x01010600.
- *
- * Note: this also requires that padding be put into the structure,
- * at least for compilers where it's implemented as __attribute__((packed)).
+ * 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(_MSC_VER) && defined(UNALIGNED))
-/* MSVC may have its own macro defined with the same name and purpose. */
-#undef UNALIGNED
-#define UNALIGNED __attribute__((packed))
-#endif
+#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.
* an 80386, so, for example, it avoids the bswap instruction added in
* the 80486.
*
- * (We don't use them on OS X; Apple provides their own, which *doesn't*
- * avoid the bswap instruction, as OS X only supports machines that
+ * (We don't use them on macOS; Apple provides their own, which *doesn't*
+ * avoid the bswap instruction, as macOS only supports machines that
* have it.)
*/
#if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
#define DIAG_JOINSTR(x,y) XSTRINGIFY(x ## y)
#define DIAG_DO_PRAGMA(x) _Pragma (#x)
-#if defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
+/*
+ * The current clang compilers also define __GNUC__ and __GNUC_MINOR__
+ * thus we need to test the clang case before the GCC one
+ */
+#if defined(__clang__)
+# if (__clang_major__ * 100) + __clang_minor__ >= 208
+# define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
+# define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
+# define DIAG_ON(x) DIAG_PRAGMA(pop)
+# else
+# define DIAG_OFF(x)
+# define DIAG_ON(x)
+# endif
+#elif defined(__GNUC__) && ((__GNUC__ * 100) + __GNUC_MINOR__) >= 402
# define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(GCC diagnostic x)
# if ((__GNUC__ * 100) + __GNUC_MINOR__) >= 406
# define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
# define DIAG_OFF(x) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
# define DIAG_ON(x) DIAG_PRAGMA(warning DIAG_JOINSTR(-W,x))
# endif
-#elif defined(__clang__) && ((__clang_major__ * 100) + __clang_minor__ >= 208)
-# define DIAG_PRAGMA(x) DIAG_DO_PRAGMA(clang diagnostic x)
-# define DIAG_OFF(x) DIAG_PRAGMA(push) DIAG_PRAGMA(ignored DIAG_JOINSTR(-W,x))
-# define DIAG_ON(x) DIAG_PRAGMA(pop)
#else
# define DIAG_OFF(x)
# define DIAG_ON(x)
#endif
+/* Use for clang specific warnings */
+#ifdef __clang__
+# define DIAG_OFF_CLANG(x) DIAG_OFF(x)
+# define DIAG_ON_CLANG(x) DIAG_ON(x)
+#else
+# define DIAG_OFF_CLANG(x)
+# define DIAG_ON_CLANG(x)
+#endif
+
/*
* For dealing with APIs which are only deprecated in OSX (like the OpenSSL API)
*/
* end of Apple deprecation workaround macros
*/
-#ifndef min
-#define min(a,b) ((a)>(b)?(b):(a))
-#endif
-#ifndef max
-#define max(a,b) ((b)>(a)?(b):(a))
-#endif
+/*
+ * Statement attributes, for various compilers.
+ *
+ * This was introduced sufficiently recently that compilers implementing
+ * it also implement __has_attribute() (for example, GCC 5.0 and later
+ * have __has_attribute(), and the "fallthrough" attribute was introduced
+ * in GCC 7).
+ */
+#if __has_attribute(fallthrough)
+# define ND_FALL_THROUGH __attribute__ ((fallthrough))
+#else
+# define ND_FALL_THROUGH
+#endif /* __has_attribute(fallthrough) */
#endif /* netdissect_stdinc_h */
projects / tcpdump / blobdiff