#include <errno.h>
+#include "compiler-tests.h"
+
+#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.
+ */
+#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.
+ */
+
+ /*
+ * 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.)
+ */
+ #define HAVE_U_INT8_T
+ #define HAVE_U_INT16_T
+ #define HAVE_U_INT32_T
+ #define HAVE_U_INT64_T
+ #endif
+#endif /* HAVE_PCAP_PCAP_INTTYPES_H */
+
#ifdef _WIN32
-#include <stdint.h>
+/*
+ * Includes and definitions for Windows.
+ */
+
#include <stdio.h>
#include <winsock2.h>
#include <ws2tcpip.h>
-#include "bittypes.h" /* in wpcap's Win32/include */
-#include <ctype.h>
#include <time.h>
#include <io.h>
#include <fcntl.h>
#include <sys/types.h>
-#include <net/netdb.h> /* in wpcap's Win32/include */
-
-#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.
+ *
+ * We require VS 2015 or newer, so we have strtoll(). Use that for
+ * strtoint64_t().
+ */
+ #define strtoint64_t strtoll
+
+ /*
+ * And we have LL as a suffix for constants, so use that.
+ */
+ #define INT64_T_CONSTANT(constant) (constant##LL)
+#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 */
-
#ifdef _MSC_VER
-#define stat _stat
-#define open _open
-#define fstat _fstat
-#define read _read
-#define close _close
-#define O_RDONLY _O_RDONLY
+ /*
+ * Microsoft tries to avoid polluting the C namespace with UN*Xisms,
+ * by adding a preceding underscore; we *want* the UN*Xisms, so add
+ * #defines to let us use them.
+ */
+ #define isatty _isatty
+ #define stat _stat
+ #define strdup _strdup
+ #define open _open
+ #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
+ * _strdup_dbg(). So if it's already defined, don't redefine
+ * it.
+ */
+ #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 */
-/* Protos for missing/x.c functions (ideally <missing/addrinfo.h>
- * should be used, but it clashes with <ws2tcpip.h>).
- */
-extern const char *inet_ntop (int, const void *, char *, size_t);
-extern int inet_pton (int, const char *, void *);
-extern int inet_aton (const char *cp, struct in_addr *addr);
-
/*
* With MSVC, for C, __inline is used to make a function an inline.
*/
#define inline __inline
#endif
+#if defined(AF_INET6) && !defined(HAVE_OS_IPV6_SUPPORT)
+#define HAVE_OS_IPV6_SUPPORT
+#endif
+
#ifndef INET6_ADDRSTRLEN
#define INET6_ADDRSTRLEN 46
#endif
#endif /* caddr_t */
#define MAXHOSTNAMELEN 64
-#define NI_MAXHOST 1025
-#define snprintf _snprintf
-#define vsnprintf _vsnprintf
-#define RETSIGTYPE void
#else /* _WIN32 */
-#include <ctype.h>
+/*
+ * Includes and definitions for various flavors of UN*X.
+ */
+
#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>
-#endif /* _WIN32 */
+/*
+ * 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
-#ifndef HAVE___ATTRIBUTE__
-#define __attribute__(x)
-#endif
+/*
+ * Assume all UN*Xes have strtoll(), and use it for strtoint64_t().
+ */
+#define strtoint64_t strtoll
/*
- * 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.
- *
- * It does not (yet) handle compilers where you can get the compiler
- * to generate code of that sort by some other means.
- *
- * 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)).
+ * Assume LL works.
*/
-#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
+#define INT64_T_CONSTANT(constant) (constant##LL)
+#endif /* _WIN32 */
+
+/*
+ * Function attributes, for various compilers.
+ */
+#include "funcattrs.h"
+/*
+ * fopen() read and write modes for text files and binary files.
+ */
#if defined(_WIN32) || defined(MSDOS)
#define FOPEN_READ_TXT "rt"
#define FOPEN_READ_BIN "rb"
#define FOPEN_WRITE_BIN FOPEN_WRITE_TXT
#endif
+/*
+ * Inline x86 assembler-language versions of ntoh[ls]() and hton[ls](),
+ * defined if the OS doesn't provide them. These assume no more than
+ * an 80386, so, for example, it avoids the bswap instruction added in
+ * the 80486.
+ *
+ * (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)
#undef ntohl
#undef ntohs
}
#endif
+/*
+ * If the OS doesn't define AF_INET6 and struct in6_addr:
+ *
+ * define AF_INET6, so we can use it internally as a "this is an
+ * IPv6 address" indication;
+ *
+ * define struct in6_addr so that we can use it for IPv6 addresses.
+ */
+#ifndef HAVE_OS_IPV6_SUPPORT
+#ifndef AF_INET6
+#define AF_INET6 24
+
+struct in6_addr {
+ union {
+ __uint8_t __u6_addr8[16];
+ __uint16_t __u6_addr16[8];
+ __uint32_t __u6_addr32[4];
+ } __u6_addr; /* 128-bit IP6 address */
+};
+#endif
+#endif
+
+#ifndef NI_MAXHOST
+#define NI_MAXHOST 1025
+#endif
+
#ifndef INET_ADDRSTRLEN
#define INET_ADDRSTRLEN 16
#endif
#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).
+ *
+ * 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) && !defined(__clang__)
+# define ND_FALL_THROUGH __attribute__ ((fallthrough))
+#else
+# define ND_FALL_THROUGH
+#endif /* __has_attribute(fallthrough) */
#endif /* netdissect_stdinc_h */
projects / tcpdump / blobdiff