mirror of
https://github.com/freebsd/freebsd-src
synced 2024-10-15 21:05:08 +00:00
ee67461e56
Local changes: - Update some local modifications to fix build - Synch config.h with upstream as much as possible Changelog: https://git.tcpdump.org/tcpdump/blob/55bc126b0216cfe409b8d6bd378f65679d136ddf:/CHANGES Reviewed by: emaste Obtained from: https://www.tcpdump.org/release/tcpdump-4.99.4.tar.gz Sponsored by: The FreeBSD Foundation
383 lines
10 KiB
C
383 lines
10 KiB
C
/*
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* Copyright (c) 2002 - 2003
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* NetGroup, Politecnico di Torino (Italy)
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Politecnico di Torino nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Include the appropriate OS header files on Windows and various flavors
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* of UNIX, include various non-OS header files on Windows, and define
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* various items as needed, to isolate most of netdissect's platform
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* differences to this one file.
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*/
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#ifndef netdissect_stdinc_h
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#define netdissect_stdinc_h
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#include "ftmacros.h"
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#include <errno.h>
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#include "compiler-tests.h"
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#include "varattrs.h"
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/*
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* If we're compiling with Visual Studio, make sure we have at least
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* VS 2015 or later, so we have sufficient C99 support.
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*
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* XXX - verify that we have at least C99 support on UN*Xes?
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*
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* What about MinGW or various DOS toolchains? We're currently assuming
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* sufficient C99 support there.
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*/
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#if defined(_MSC_VER)
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/*
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* Make sure we have VS 2015 or later.
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*/
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#if _MSC_VER < 1900
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#error "Building tcpdump requires VS 2015 or later"
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#endif
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#endif
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/*
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* Get the C99 types, and the PRI[doux]64 format strings, defined.
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*/
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#ifdef HAVE_PCAP_PCAP_INTTYPES_H
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/*
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* We have pcap/pcap-inttypes.h; use that, as it'll do all the
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* work, and won't cause problems if a file includes this file
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* and later includes a pcap header file that also includes
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* pcap/pcap-inttypes.h.
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*/
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#include <pcap/pcap-inttypes.h>
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#else
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/*
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* OK, we don't have pcap/pcap-inttypes.h, so we'll have to
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* do the work ourselves, but at least we don't have to
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* worry about other headers including it and causing
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* clashes.
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*/
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/*
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* Include <inttypes.h> to get the integer types and PRi[doux]64 values
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* defined.
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*
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* If the compiler is MSVC, we require VS 2015 or newer, so we
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* have <inttypes.h> - and support for %zu in the formatted
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* printing functions.
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*
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* If the compiler is MinGW, we assume we have <inttypes.h> - and
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* support for %zu in the formatted printing functions.
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*
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* If the target is UN*X, we assume we have a C99-or-later development
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* environment, and thus have <inttypes.h> - and support for %zu in
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* the formatted printing functions.
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*
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* If the target is MS-DOS, we assume we have <inttypes.h> - and support
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* for %zu in the formatted printing functions.
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*/
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#include <inttypes.h>
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#if defined(_MSC_VER)
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/*
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* Suppress definition of intN_t in bittypes.h, which might be included
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* by <pcap/pcap.h> in older versions of WinPcap.
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* (Yes, HAVE_U_INTn_T, as the definition guards are UN*X-oriented.)
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*/
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#define HAVE_U_INT8_T
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#define HAVE_U_INT16_T
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#define HAVE_U_INT32_T
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#define HAVE_U_INT64_T
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#endif
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#endif /* HAVE_PCAP_PCAP_INTTYPES_H */
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#ifdef _WIN32
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/*
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* Includes and definitions for Windows.
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*/
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#include <stdio.h>
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#include <winsock2.h>
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#include <ws2tcpip.h>
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#include <time.h>
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#include <io.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#ifdef _MSC_VER
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/*
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* Compiler is MSVC.
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*
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* We require VS 2015 or newer, so we have strtoll(). Use that for
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* strtoint64_t().
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*/
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#define strtoint64_t strtoll
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/*
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* And we have LL as a suffix for constants, so use that.
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*/
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#define INT64_T_CONSTANT(constant) (constant##LL)
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#else
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/*
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* Non-Microsoft compiler.
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*
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* XXX - should we use strtoll or should we use _strtoi64()?
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*/
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#define strtoint64_t strtoll
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/*
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* Assume LL works.
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*/
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#define INT64_T_CONSTANT(constant) (constant##LL)
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#endif
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#ifdef _MSC_VER
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/*
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* Microsoft tries to avoid polluting the C namespace with UN*Xisms,
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* by adding a preceding underscore; we *want* the UN*Xisms, so add
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* #defines to let us use them.
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*/
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#define isatty _isatty
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#define stat _stat
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#define strdup _strdup
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#define open _open
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#define read _read
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#define close _close
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#define O_RDONLY _O_RDONLY
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/*
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* We define our_fstat64 as _fstati64, and define our_statb as
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* struct _stati64, so we get 64-bit file sizes.
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*/
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#define our_fstat _fstati64
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#define our_statb struct _stati64
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/*
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* If <crtdbg.h> has been included, and _DEBUG is defined, and
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* __STDC__ is zero, <crtdbg.h> will define strdup() to call
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* _strdup_dbg(). So if it's already defined, don't redefine
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* it.
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*/
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#ifndef strdup
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#define strdup _strdup
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#endif
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/*
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* Windows doesn't have ssize_t; routines such as _read() return int.
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*/
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typedef int ssize_t;
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#endif /* _MSC_VER */
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/*
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* With MSVC, for C, __inline is used to make a function an inline.
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*/
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#ifdef _MSC_VER
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#define inline __inline
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#endif
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#if defined(AF_INET6) && !defined(HAVE_OS_IPV6_SUPPORT)
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#define HAVE_OS_IPV6_SUPPORT
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#endif
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#ifndef INET6_ADDRSTRLEN
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#define INET6_ADDRSTRLEN 46
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#endif
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/* It is in MSVC's <errno.h>, but not defined in MingW+Watcom.
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*/
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#ifndef EAFNOSUPPORT
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#define EAFNOSUPPORT WSAEAFNOSUPPORT
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#endif
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#ifndef caddr_t
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typedef char *caddr_t;
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#endif /* caddr_t */
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#define MAXHOSTNAMELEN 64
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#else /* _WIN32 */
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/*
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* Includes and definitions for various flavors of UN*X.
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*/
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#include <unistd.h>
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#include <netdb.h>
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#include <sys/param.h>
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#include <sys/types.h> /* concession to AIX */
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <time.h>
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#include <arpa/inet.h>
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/*
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* We should have large file support enabled, if it's available,
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* so just use fstat as our_fstat and struct stat as our_statb.
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*/
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#define our_fstat fstat
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#define our_statb struct stat
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/*
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* Assume all UN*Xes have strtoll(), and use it for strtoint64_t().
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*/
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#define strtoint64_t strtoll
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/*
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* Assume LL works.
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*/
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#define INT64_T_CONSTANT(constant) (constant##LL)
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#endif /* _WIN32 */
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/*
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* Function attributes, for various compilers.
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*/
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#include "funcattrs.h"
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/*
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* fopen() read and write modes for text files and binary files.
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*/
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#if defined(_WIN32) || defined(MSDOS)
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#define FOPEN_READ_TXT "rt"
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#define FOPEN_READ_BIN "rb"
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#define FOPEN_WRITE_TXT "wt"
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#define FOPEN_WRITE_BIN "wb"
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#else
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#define FOPEN_READ_TXT "r"
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#define FOPEN_READ_BIN FOPEN_READ_TXT
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#define FOPEN_WRITE_TXT "w"
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#define FOPEN_WRITE_BIN FOPEN_WRITE_TXT
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#endif
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/*
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* Inline x86 assembler-language versions of ntoh[ls]() and hton[ls](),
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* defined if the OS doesn't provide them. These assume no more than
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* an 80386, so, for example, it avoids the bswap instruction added in
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* the 80486.
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*
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* (We don't use them on macOS; Apple provides their own, which *doesn't*
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* avoid the bswap instruction, as macOS only supports machines that
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* have it.)
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*/
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#if defined(__GNUC__) && defined(__i386__) && !defined(__APPLE__) && !defined(__ntohl)
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#undef ntohl
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#undef ntohs
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#undef htonl
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#undef htons
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static __inline__ unsigned long __ntohl (unsigned long x);
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static __inline__ unsigned short __ntohs (unsigned short x);
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#define ntohl(x) __ntohl(x)
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#define ntohs(x) __ntohs(x)
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#define htonl(x) __ntohl(x)
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#define htons(x) __ntohs(x)
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static __inline__ unsigned long __ntohl (unsigned long x)
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{
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__asm__ ("xchgb %b0, %h0\n\t" /* swap lower bytes */
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"rorl $16, %0\n\t" /* swap words */
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"xchgb %b0, %h0" /* swap higher bytes */
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: "=q" (x) : "0" (x));
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return (x);
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}
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static __inline__ unsigned short __ntohs (unsigned short x)
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{
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__asm__ ("xchgb %b0, %h0" /* swap bytes */
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: "=q" (x) : "0" (x));
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return (x);
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}
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#endif
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/*
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* If the OS doesn't define AF_INET6 and struct in6_addr:
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*
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* define AF_INET6, so we can use it internally as a "this is an
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* IPv6 address" indication;
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*
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* define struct in6_addr so that we can use it for IPv6 addresses.
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*/
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#ifndef HAVE_OS_IPV6_SUPPORT
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#ifndef AF_INET6
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#define AF_INET6 24
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struct in6_addr {
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union {
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__uint8_t __u6_addr8[16];
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__uint16_t __u6_addr16[8];
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__uint32_t __u6_addr32[4];
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} __u6_addr; /* 128-bit IP6 address */
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};
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#endif
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#endif
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#ifndef NI_MAXHOST
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#define NI_MAXHOST 1025
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#endif
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#ifndef INET_ADDRSTRLEN
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#define INET_ADDRSTRLEN 16
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef FALSE
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#define FALSE 0
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#endif
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/*
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* Statement attributes, for various compilers.
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*
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* This was introduced sufficiently recently that compilers implementing
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* it also implement __has_attribute() (for example, GCC 5.0 and later
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* have __has_attribute(), and the "fallthrough" attribute was introduced
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* in GCC 7).
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*
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* Unfortunately, Clang does this wrong - a statement
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*
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* __attribute__ ((fallthrough));
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*
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* produces bogus -Wmissing-declaration "declaration does not declare
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* anything" warnings (dear Clang: that's not a declaration, it's an
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* empty statement). GCC, however, has no trouble with this.
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*/
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#if __has_attribute(fallthrough) && !defined(__clang__)
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# define ND_FALL_THROUGH __attribute__ ((fallthrough))
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#else
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# define ND_FALL_THROUGH
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#endif /* __has_attribute(fallthrough) */
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#endif /* netdissect_stdinc_h */
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