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| -rw-r--r-- | netdissect-stdinc.h | 382 |
1 files changed, 382 insertions, 0 deletions
diff --git a/netdissect-stdinc.h b/netdissect-stdinc.h new file mode 100644 index 0000000..e81c90b --- /dev/null +++ b/netdissect-stdinc.h @@ -0,0 +1,382 @@ +/* + * Copyright (c) 2002 - 2003 + * NetGroup, Politecnico di Torino (Italy) + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. Neither the name of the Politecnico di Torino nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +/* + * Include the appropriate OS header files on Windows and various flavors + * of UNIX, include various non-OS header files on Windows, and define + * various items as needed, to isolate most of netdissect's platform + * differences to this one file. + */ + +#ifndef netdissect_stdinc_h +#define netdissect_stdinc_h + +#include "ftmacros.h" + +#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 + +/* + * Includes and definitions for Windows. + */ + +#include <stdio.h> +#include <winsock2.h> +#include <ws2tcpip.h> +#include <time.h> +#include <io.h> +#include <fcntl.h> +#include <sys/types.h> + +#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 + + /* + * Assume LL works. + */ + #define INT64_T_CONSTANT(constant) (constant##LL) +#endif + +#ifdef _MSC_VER + /* + * 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 */ + +/* + * With MSVC, for C, __inline is used to make a function an inline. + */ +#ifdef _MSC_VER +#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 + +/* It is in MSVC's <errno.h>, but not defined in MingW+Watcom. + */ +#ifndef EAFNOSUPPORT +#define EAFNOSUPPORT WSAEAFNOSUPPORT +#endif + +#ifndef caddr_t +typedef char *caddr_t; +#endif /* caddr_t */ + +#define MAXHOSTNAMELEN 64 + +#else /* _WIN32 */ + +/* + * Includes and definitions for various flavors of UN*X. + */ + +#include <unistd.h> +#include <netdb.h> +#include <sys/param.h> +#include <sys/types.h> /* concession to AIX */ +#include <sys/time.h> +#include <sys/socket.h> +#include <netinet/in.h> + +#include <time.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(). + */ +#define strtoint64_t strtoll + +/* + * Assume LL works. + */ +#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_TXT "wt" + #define FOPEN_WRITE_BIN "wb" +#else + #define FOPEN_READ_TXT "r" + #define FOPEN_READ_BIN FOPEN_READ_TXT + #define FOPEN_WRITE_TXT "w" + #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 + #undef htonl + #undef htons + + static __inline__ unsigned long __ntohl (unsigned long x); + static __inline__ unsigned short __ntohs (unsigned short x); + + #define ntohl(x) __ntohl(x) + #define ntohs(x) __ntohs(x) + #define htonl(x) __ntohl(x) + #define htons(x) __ntohs(x) + + static __inline__ unsigned long __ntohl (unsigned long x) + { + __asm__ ("xchgb %b0, %h0\n\t" /* swap lower bytes */ + "rorl $16, %0\n\t" /* swap words */ + "xchgb %b0, %h0" /* swap higher bytes */ + : "=q" (x) : "0" (x)); + return (x); + } + + static __inline__ unsigned short __ntohs (unsigned short x) + { + __asm__ ("xchgb %b0, %h0" /* swap bytes */ + : "=q" (x) : "0" (x)); + return (x); + } +#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 + +#ifndef TRUE +#define TRUE 1 +#endif + +#ifndef FALSE +#define FALSE 0 +#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 */ |