if(WIN32)

if(WIN32)
#
# We need 3.12 or later, so that we can set policy CMP0074; see
# below.
#
cmake_minimum_required(VERSION 3.12)
else(WIN32)
#
# For now:
#
# if this is a version of CMake less than 3.5, require only
# 2.8.12, just in case somebody is configuring with CMake
# on a "long-term support" version # of some OS and that
# version supplies an older version of CMake;
#
# otherwise, require 3.5, so we don't get messages warning
# that support for versions of CMake lower than 3.5 is
# deprecated.
#
if(CMAKE_VERSION VERSION_LESS "3.5")
cmake_minimum_required(VERSION 2.8.12)
else()
cmake_minimum_required(VERSION 3.5)
endif()
endif(WIN32)

#
# Apple doesn't build with an install_name starting with @rpath, and
# neither do we with autotools; don't do so with CMake, either, and
# suppress warnings about that.
#
# Setting CMAKE_MACOSX_RPATH to FALSE uses the old behavior,
# but removes the POLICY CMP0042 OLD deprecated warning.
# See https://cmake.org/cmake/help/latest/policy/CMP0042.html
#
if (NOT DEFINED CMAKE_MACOSX_RPATH)
set(CMAKE_MACOSX_RPATH FALSE)
endif()
if(POLICY CMP0042)
cmake_policy(SET CMP0042 NEW)
endif()

#
# Squelch noise about quoted strings in if() statements.
# WE KNOW WHAT WE'RE DOING, WE'RE DOING EVERYTHING THE WAY THAT NEWER
# VERSIONS OF CMAKE EXPECT BY DEFAULT, DON'T WASTE OUR TIME WITH NOISE.
#
if(POLICY CMP0054)
cmake_policy(SET CMP0054 NEW)
endif()

#
# We want find_file() and find_library() to honor {packagename}_ROOT,
# as that appears to be the only way, with the Visual Studio 2019 IDE
# and its CMake support, to tell CMake where to look for the Npcap
# or WinPcap SDK.
#
if(POLICY CMP0074)
cmake_policy(SET CMP0074 NEW)
endif()

#
# We want check_include_file() to honor CMAKE_REQUIRED_LIBRARIES; see
# the big comment before the check_include_file() test for
# infiniband/verbs.h for the reason.
#
if(POLICY CMP0075)
cmake_policy(SET CMP0075 NEW)
endif()

set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/cmake/Modules)

#
# We explicitly indicate what languages are used in libpcap to avoid
# checking for a C++ compiler.
#
# One reason to avoid that check is that there's no need to waste
# configuration time performing it.
#
# Another reason is that:
#
# CMake will try to determine the sizes of some data types, including
# void *, early in the process of configuration; apparently, it's done
# as part of processing the project() command.
#
# At least as of CMake 2.8.6, it does so by checking the size of
# "void *" in C, setting CMAKE_C_SIZEOF_DATA_PTR based on that,
# setting CMAKE_SIZEOF_VOID_P to that, and then checking the size
# of "void *" in C++, setting CMAKE_CXX_SIZEOF_DATA_PTR based on
# that, and then setting CMAKE_SIZEOF_VOID_P to *that*.
#
# The compile tests include whatever C flags may have been provided
# to CMake in the CFLAGS and CXXFLAGS environment variables.
#
# If you set an architecture flag such as -m32 or -m64 in CFLAGS
# but *not* in CXXFLAGS, the size for C++ will win, and hilarity
# will ensue.
#
# Or if, at least on Solaris, you have a newer version of GCC
# installed, but *not* a newer version of G++, and you have Oracle
# Studio installed, it will find GCC, which will default to building
# 64-bit, and Oracle Studio's C++ compiler, which will default to
# building 32-bit, the size for C++ will win, and, again, hilarity
# will ensue.
#
project(pcap C)

#
# Setting CMAKE_MACOSX_RPATH to FALSE causes the installed
# libpcap.A.dylib to have just libpcap.A.dylib as the install
# name; Apple built libpcap with an install_name of /usr/lib/libpcap.A.dylib
# (back when they still shipped individual system dylibs rather than
# shipping a pre-built shared library cache, at least), and we do the
# same with autotools; do the same with CMake.
#
if (NOT DEFINED CMAKE_INSTALL_NAME_DIR)
set(CMAKE_INSTALL_NAME_DIR ${CMAKE_INSTALL_PREFIX}/lib)
endif()

#
# For getting raw lists of --libs and --libs --static information from a
# pkg-config module.
#
# In CMake up to 2.8.12, pkg_check_modules() sets:
#
# <XPREFIX>_LIBRARIES, which is a list of library names to which, on
# a UN*X, -l can be prefixed - i.e., names, without extensions,
# rather than full paths to the file.
# <XPREFIX>_LIBRARY_DIRS, which is a list of paths to directories
# containing the libraries, to which, on a UN*X, -L can be
# prefixed.
# <XPREFIX>_LDFLAGS, which is a list of *all* required linker flags
# <XPREFIX>_LDFLAGS_OTHER, which is a list of all linker flags other
# than -l and -L flags
#
# In 3.0 (at least as of 3.0.2), it also sets:
#
# <XPREFIX>_LINK_LIBRARIES, which is a list of full paths to the
# library files.
#
# but if <XPREFIX> is <PREFIX>_STATIC, <XPREFIX>_LINK_LIBRARIES is
# currently not set by CMake.
#
# Unfortunately, pkg_check_modules() sets the
# PKG_CONFIG_ALLOW_SYSTEM_LIBS environment variable when running
# pkg-config, so the output of --libs, etc. may include a -L for the
# system library, which we do *NOT* want to put in our libpcap.pc and
# pcap-config files.
#
# So we just run pkg-config ourselves, so that we get its output
# directly without any processing by CMake.
#
macro(pkg_get_link_info _prefix _package)
if (PKG_CONFIG_EXECUTABLE)
#
# Get the --libs information.
#
# We force PKG_CONFIG_ALLOW_SYSTEM_LIBS to be undefined, as
# at least some versions of CMake appear to define it in
# pkg_check_modules() before running pkg-config and *not* undefine
# it after running it.
#
unset(ENV{PKG_CONFIG_ALLOW_SYSTEM_LIBS})
set(_pkg_config_result "")
execute_process(
COMMAND ${PKG_CONFIG_EXECUTABLE} "--libs" ${_package}
OUTPUT_VARIABLE _pkg_config_result
RESULT_VARIABLE _pkg_config_failed
OUTPUT_STRIP_TRAILING_WHITESPACE)

if (_pkg_config_failed)
#
# pkg-config failed; assume that means that there is no such
# package for it to find. XXX - what do we do here?
#
set(${_prefix}_FOUND_WITH_PKG_CONFIG FALSE)
else()
#
# pkg-config succeeded; replace CR and LF with spaces.
#
string(REGEX REPLACE "[\r\n]" " " ${_prefix}_LIBS "${_pkg_config_result}")

#
# Now get the --libs --static information.
#
set(_pkg_config_result "")
execute_process(
COMMAND ${PKG_CONFIG_EXECUTABLE} "--libs" "--static" ${_package}
OUTPUT_VARIABLE _pkg_config_result
RESULT_VARIABLE _pkg_config_failed
OUTPUT_STRIP_TRAILING_WHITESPACE)

if (_pkg_config_failed)
#
# pkg-config failed; assume that means that there is no such
# package for it to find. XXX - what do we do here?
#
set(${_prefix}_FOUND_WITH_PKG_CONFIG FALSE)
else()
#
# pkg-config succeeded; replace CR and LF with spaces.
#
string(REGEX REPLACE "[\r\n]" " " ${_prefix}_LIBS_STATIC "${_pkg_config_result}")

#
# List this package in its PACKAGE_NAME variable.
#
set(${_prefix}_PACKAGE_NAME "${_package}")

#
# It worked.
#
set(${_prefix}_FOUND_WITH_PKG_CONFIG TRUE)
endif()
endif()
endif()
endmacro()

macro(get_link_info_from_library_path _library_prefix _library_name)
if(NOT ${_library_prefix}_LIBRARY STREQUAL "${_library_prefix}_LIBRARY-NOTFOUND")
get_filename_component(_lib_directory "${${_library_prefix}_LIBRARY}}" DIRECTORY)

#
# The closest thing to a list of "system library directories" in
# which the linker will, by default, search for libraries appears to
# be CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES, so that's what we use
# when we're trying to construct a -L argument, for insertion into
# pcap-config and libpcap.pc, for a library upon which we depend.
#
# In some versions of CMake it appears to have duplicate entries,
# but that shouldn't affect a search for a directory in that list.
#
list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${_lib_directory}" _lib_index)
if(_lib_index EQUAL -1)
#
# No, so add a -L flag to get the linker to search in that
# directory.
#
set(${_library_prefix}_LIBS "-L${_lib_directory}")
set(${_library_prefix}_LIBS_STATIC "-L${_lib_directory}")
set(${_libraryprefix}_LIBS_PRIVATE "-L${_lib_directory}")
endif()
set(${_library_prefix}_LIBS "${${_library_prefix}_LIBS} -l${_library_name}")
set(${_library_prefix}_LIBS_STATIC "${${_library_prefix}_LIBS} -l${_library_name}")
set(${_library_prefix}_LIBS_PRIVATE "${${_library_prefix}_LIBS} -l${_library_name}")
endif()
endmacro()

#
# Show the bit width for which we're compiling.
# This can help debug problems if you're dealing with a compiler that
# defaults to generating 32-bit code even when running on a 64-bit
# platform, and where that platform may provide only 64-bit versions of
# libraries that we might use (looking at *you*, Oracle Studio!).
#
if(CMAKE_SIZEOF_VOID_P EQUAL 4)
message(STATUS "Building 32-bit")
elseif(CMAKE_SIZEOF_VOID_P EQUAL 8)
message(STATUS "Building 64-bit")
endif()

#
# Solaris pkg-config is annoying. For at least one package (D-Bus, I'm
# looking at *you*!), there are separate include files for 32-bit and
# 64-bit builds (I guess using "unsigned long long" as a 64-bit integer
# type on a 64-bit build is like crossing the beams or something), and
# there are two separate .pc files, so if we're doing a 32-bit build we
# should make sure we look in /usr/lib/pkgconfig for .pc files and if
# we're doing a 64-bit build we should make sure we look in
# /usr/lib/amd64/pkgconfig for .pc files.
#
if(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
#
# Note: string(REPLACE) does not appear to support using ENV{...}
# as an argument, so we set a variable and then use set() to set
# the environment variable.
#
if(CMAKE_SIZEOF_VOID_P EQUAL 8)
#
# 64-bit build. If /usr/lib/pkgconfig appears in the path,
# prepend /usr/lib/amd64/pkgconfig to it; otherwise,
# put /usr/lib/amd64 at the end.
#
if((NOT DEFINED ENV{PKG_CONFIG_PATH}) OR "$ENV{PKG_CONFIG_PATH}" EQUAL "")
#
# Not set, or empty. Set it to /usr/lib/amd64/pkgconfig.
#
set(fixed_path "/usr/lib/amd64/pkgconfig")
elseif("$ENV{PKG_CONFIG_PATH}" MATCHES "/usr/lib/pkgconfig")
#
# It contains /usr/lib/pkgconfig. Prepend
# /usr/lib/amd64/pkgconfig to /usr/lib/pkgconfig.
#
string(REPLACE "/usr/lib/pkgconfig"
"/usr/lib/amd64/pkgconfig:/usr/lib/pkgconfig"
fixed_path "$ENV{PKG_CONFIG_PATH}")
else()
#
# Not empty, but doesn't contain /usr/lib/pkgconfig.
# Append /usr/lib/amd64/pkgconfig to it.
#
set(fixed_path "$ENV{PKG_CONFIG_PATH}:/usr/lib/amd64/pkgconfig")
endif()
set(ENV{PKG_CONFIG_PATH} "${fixed_path}")
elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
#
# 32-bit build. If /usr/amd64/lib/pkgconfig appears in the path,
# prepend /usr/lib/pkgconfig to it.
#
if("$ENV{PKG_CONFIG_PATH}" MATCHES "/usr/lib/amd64/pkgconfig")
#
# It contains /usr/lib/amd64/pkgconfig. Prepend
# /usr/lib/pkgconfig to /usr/lib/amd64/pkgconfig.
#
string(REPLACE "/usr/lib/amd64/pkgconfig"
"/usr/lib/pkgconfig:/usr/lib/amd64/pkgconfig"
fixed_path "$ENV{PKG_CONFIG_PATH}")
set(ENV{PKG_CONFIG_PATH} "${fixed_path}")
endif()
endif()
endif()

include(CheckCCompilerFlag)

#
# For checking if a compiler flag works and adding it if it does.
#
macro(check_and_add_compiler_option _option)
message(STATUS "Checking C compiler flag ${_option}")
string(REPLACE "=" "-" _temp_option_variable ${_option})
string(REGEX REPLACE "^-" "" _option_variable ${_temp_option_variable})
check_c_compiler_flag("${_option}" ${_option_variable})
if(${${_option_variable}})
set(C_ADDITIONAL_FLAGS "${C_ADDITIONAL_FLAGS} ${_option}")
endif()
endmacro()

#
# If we're building with Visual Studio, we require Visual Studio 2015,
# in order to get sufficient C99 compatibility. Check for that.
#
# If not, try the appropriate flag for the compiler to enable C99
# features.
#
set(C_ADDITIONAL_FLAGS "")
if(MSVC)
if(MSVC_VERSION LESS 1900)
message(FATAL_ERROR "Visual Studio 2015 or later is required")
endif()

#
# Treat source files as being in UTF-8 with MSVC if it's not using
# the Clang front end.
# We assume that UTF-8 source is OK with other compilers and with
# MSVC if it's using the Clang front end.
#
if(NOT ${CMAKE_C_COMPILER} MATCHES "clang*")
set(C_ADDITIONAL_FLAGS "${C_ADDITIONAL_FLAGS} /utf-8")
endif(NOT ${CMAKE_C_COMPILER} MATCHES "clang*")
else(MSVC)
#
# For checking if a compiler flag works, failing if it doesn't,
# and adding it otherwise.
#
macro(require_and_add_compiler_option _option)
message(STATUS "Checking C compiler flag ${_option}")
string(REPLACE "=" "-" _temp_option_variable ${_option})
string(REGEX REPLACE "^-" "" _option_variable ${_temp_option_variable})
check_c_compiler_flag("${_option}" ${_option_variable})
if(${${_option_variable}})
set(C_ADDITIONAL_FLAGS "${C_ADDITIONAL_FLAGS} ${_option}")
else()
message(FATAL_ERROR "C99 support is required, but the compiler doesn't support a compiler flag to enable it")
endif()
endmacro()

#
# Try to enable as many C99 features as we can.
# At minimum, we want C++/C99-style // comments.
#
# Newer versions of compilers might default to supporting C99, but
# older versions may require a special flag.
#
# Prior to CMake 3.1, setting CMAKE_C_STANDARD will not have any effect,
# so, unless and until we require CMake 3.1 or later, we have to do it
# ourselves on pre-3.1 CMake, so we just do it ourselves on all versions
# of CMake.
#
# Note: with CMake 3.1 through 3.5, the only compilers for which CMake
# handles CMAKE_C_STANDARD are GCC and Clang. 3.6 adds support only
# for Intel C; 3.9 adds support for PGI C, Sun C, and IBM XL C, and
# 3.10 adds support for Cray C and IAR C, but no version of CMake has
# support for HP C. Therefore, even if we use CMAKE_C_STANDARD with
# compilers for which CMake supports it, we may still have to do it
# ourselves on other compilers.
#
# See the CMake documentation for the CMAKE_<LANG>_COMPILER_ID variables
# for a list of compiler IDs.
#
# XXX - this just tests whether the option works, fails if it doesn't,
# and adds it if it does. We don't test whether it's necessary in order
# to get the C99 features that we use, or whether, if it's used, it
# enables all the features that we require.
#
if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR
CMAKE_C_COMPILER_ID MATCHES "Clang")
require_and_add_compiler_option("-std=gnu99")
elseif(CMAKE_C_COMPILER_ID MATCHES "XL")
#
# We want support for extensions picked up for GNU C compatibility,
# so we use -qlanglvl=extc99.
#
require_and_add_compiler_option("-qlanglvl=extc99")
elseif(CMAKE_C_COMPILER_ID MATCHES "HP")
require_and_add_compiler_option("-AC99")
elseif(CMAKE_C_COMPILER_ID MATCHES "Sun")
require_and_add_compiler_option("-xc99")
elseif(CMAKE_C_COMPILER_ID MATCHES "Intel")
require_and_add_compiler_option("-c99")
endif()
endif(MSVC)

#
# If we're building with MinGW, we need to specify _WIN32_WINNT as
# 0x0600 ("NT 6.0", a/k/a Vista/Windows Server 2008) or higher
# in order to get the full IPv6 API, including inet_ntop(), and we
# need to specify it as 0x0601 ("NT 6.1", a/k/a Windows 7) or higher
# in order to get NdisMediumIP.
#
# NOTE: pcap does *NOT* work with msvcrt.dll; it must link with
# a newer version of the C library, i.e. Visual Studio 2015 or
# later, as it depends on C99 features introduced in VS 2015.
#
if(MINGW)
add_definitions(-D_WIN32_WINNT=0x0601)
endif(MINGW)

#
# Build all runtimes in the top-level binary directory; that way,
# on Windows, the executables will be in the same directory as
# the DLLs, so the system will find pcap.dll when any of the
# executables are run.
#
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/run)

###################################################################
# Parameters
###################################################################

if(WIN32)
#
# On Windows, allow the library name to be overridden, for the
# benefit of projects that combine libpcap with their own
# kernel-mode code to support capturing.
#
set(LIBRARY_NAME pcap CACHE STRING "Library name")
else()
#
# On UN*X, it's always been libpcap.
#
set(LIBRARY_NAME pcap)
endif()

option(INET6 "Enable IPv6" ON)
if(WIN32)
option(USE_STATIC_RT "Use static Runtime" ON)
endif(WIN32)
option(BUILD_SHARED_LIBS "Build shared libraries" ON)
set(dpdk_ROOT "" CACHE PATH "Path to directory with include and lib subdirectories for DPDK")
if(WIN32)
set(Packet_ROOT "" CACHE PATH "Path to directory with include and lib subdirectories for packet.dll")
set(AirPcap_ROOT "" CACHE PATH "Path to directory with include and lib subdirectories for airpcap.dll")
endif(WIN32)

option(ENABLE_PROFILING "Enable code profiling" OFF)

# To pacify those who hate the protochain instruction
option(NO_PROTOCHAIN "Disable protochain instruction" OFF)

#
# Start out with the capture mechanism type unspecified; the user
# can explicitly specify it and, if they don't, we'll pick an
# appropriate one.
#
set(PCAP_TYPE "" CACHE STRING "Packet capture type")

#
# Default to having remote capture support on Windows and, for now, to
# not having it on UN*X.
#
if(WIN32)
option(ENABLE_REMOTE "Enable remote capture" ON)
else()
option(ENABLE_REMOTE "Enable remote capture" OFF)
endif(WIN32)

if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
option(BUILD_WITH_LIBNL "Build with libnl" ON)
endif()

#
# Additional capture modules.
#
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
option(DISABLE_LINUX_USBMON "Disable Linux usbmon USB sniffing support" OFF)
endif()
option(DISABLE_BLUETOOTH "Disable Bluetooth sniffing support" OFF)
option(DISABLE_NETMAP "Disable netmap support" OFF)
option(DISABLE_DPDK "Disable DPDK support" OFF)

#
# We don't support D-Bus sniffing on macOS; see
#
# https://bugs.freedesktop.org/show_bug.cgi?id=74029
#
if(APPLE)
option(DISABLE_DBUS "Disable D-Bus sniffing support" ON)
else(APPLE)
option(DISABLE_DBUS "Disable D-Bus sniffing support" OFF)
endif(APPLE)
option(DISABLE_RDMA "Disable RDMA sniffing support" OFF)

option(DISABLE_DAG "Disable Endace DAG card support" OFF)

option(DISABLE_SEPTEL "Disable Septel card support" OFF)
set(SEPTEL_ROOT "${CMAKE_CURRENT_SOURCE_DIR}/../septel" CACHE PATH "Path to directory with include and lib subdirectories for Septel API")

option(DISABLE_SNF "Disable Myricom SNF support" OFF)

option(DISABLE_TC "Disable Riverbed TurboCap support" OFF)

#
# Debugging options.
#
option(BDEBUG "Build optimizer debugging code" OFF)
option(YYDEBUG "Build parser debugging code" OFF)

###################################################################
# Versioning
###################################################################

# Get, parse, format and set pcap's version string from [pcap_root]/VERSION
# for later use.

# Get MAJOR, MINOR, PATCH & SUFFIX
file(STRINGS ${pcap_SOURCE_DIR}/VERSION
PACKAGE_VERSION
LIMIT_COUNT 1 # Read only the first line
)

# Get "just" MAJOR
string(REGEX MATCH "^([0-9]+)" PACKAGE_VERSION_MAJOR "${PACKAGE_VERSION}")

# Get MAJOR, MINOR & PATCH
string(REGEX MATCH "^([0-9]+.)?([0-9]+.)?([0-9]+)" PACKAGE_VERSION_NOSUFFIX "${PACKAGE_VERSION}")

if(WIN32)
# Convert PCAP_VERSION_NOSUFFIX to Windows preferred version format
string(REPLACE "." "," PACKAGE_VERSION_PREDLL ${PACKAGE_VERSION_NOSUFFIX})

# Append NANO (used for Windows internal versioning) to PCAP_VERSION_PREDLL
# 0 means unused.
set(PACKAGE_VERSION_DLL ${PACKAGE_VERSION_PREDLL},0)
endif(WIN32)

set(PACKAGE_NAME "${LIBRARY_NAME}")
set(PACKAGE_STRING "${LIBRARY_NAME} ${PACKAGE_VERSION}")

######################################
# Project settings
######################################

include_directories(
${CMAKE_CURRENT_BINARY_DIR}
${pcap_SOURCE_DIR}
)

include(CheckFunctionExists)
include(CMakePushCheckState)
include(CheckSymbolExists)

if(WIN32)

if(IS_DIRECTORY ${CMAKE_HOME_DIRECTORY}/../../Common)
include_directories(${CMAKE_HOME_DIRECTORY}/../../Common)
endif(IS_DIRECTORY ${CMAKE_HOME_DIRECTORY}/../../Common)

find_package(Packet)
if(Packet_FOUND)
set(HAVE_PACKET32 TRUE)
include_directories(${Packet_INCLUDE_DIRS})
#
# Check whether we have the NPcap PacketIsLoopbackAdapter()
# function.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${Packet_LIBRARIES})
check_function_exists(PacketIsLoopbackAdapter HAVE_PACKET_IS_LOOPBACK_ADAPTER)
check_function_exists(PacketGetTimestampModes HAVE_PACKET_GET_TIMESTAMP_MODES)
cmake_pop_check_state()
endif(Packet_FOUND)

message(STATUS "checking for Npcap's version.h")
check_symbol_exists(WINPCAP_PRODUCT_NAME "${CMAKE_SOURCE_DIR}/../../version.h" HAVE_VERSION_H)
if(HAVE_VERSION_H)
message(STATUS "HAVE version.h")
else(HAVE_VERSION_H)
message(STATUS "MISSING version.h")
endif(HAVE_VERSION_H)

endif(WIN32)

if(MSVC)
add_definitions(-D__STDC__)
add_definitions(-D_CRT_SECURE_NO_WARNINGS)
endif(MSVC)

if(USE_STATIC_RT)
message(STATUS "Use STATIC runtime")
if(MSVC)
foreach(RT_FLAG
CMAKE_C_FLAGS CMAKE_C_FLAGS_DEBUG CMAKE_C_FLAGS_RELEASE
CMAKE_C_FLAGS_MINSIZEREL CMAKE_C_FLAGS_RELWITHDEBINFO)
string(REGEX REPLACE "/MD" "/MT" ${RT_FLAG} "${${RT_FLAG}}")
endforeach(RT_FLAG)
elseif(MINGW)
set(CMAKE_SHARED_LINKER_FLAGS "${CMAKE_SHARED_LINKER_FLAGS} -static-libgcc")
endif()
else (USE_STATIC_RT)
message(STATUS "Use DYNAMIC runtime")
endif(USE_STATIC_RT)

###################################################################
# Detect available platform features
###################################################################

include(CheckIncludeFile)
include(CheckIncludeFiles)
include(CheckStructHasMember)
include(CheckTypeSize)

#
# Tests are a bit expensive with Visual Studio on Windows, so, on
# Windows, we skip tests for UN*X-only headers and functions.
#

#
# Header files.
#
check_include_file(inttypes.h HAVE_INTTYPES_H)
check_include_file(stdint.h HAVE_STDINT_H)
check_include_file(unistd.h HAVE_UNISTD_H)
if(NOT HAVE_UNISTD_H)
add_definitions(-DYY_NO_UNISTD_H)
endif(NOT HAVE_UNISTD_H)
check_include_file(bitypes.h HAVE_SYS_BITYPES_H)
if(NOT WIN32)
check_include_file(sys/ioccom.h HAVE_SYS_IOCCOM_H)
check_include_file(sys/sockio.h HAVE_SYS_SOCKIO_H)
check_include_file(sys/select.h HAVE_SYS_SELECT_H)

check_include_file(netpacket/packet.h HAVE_NETPACKET_PACKET_H)
check_include_file(netinet/if_ether.h HAVE_NETINET_IF_ETHER_H)
endif(NOT WIN32)

#
# Functions.
#
# First, check for the __atomic_load_n() and __atomic_store_n()
# builtins.
#
# We can't use check_function_exists(), as it tries to declare
# the function, and attempting to declare a compiler builtin
# can produce an error.
#
# We don't use check_symbol_exists(), as it expects a header
# file to be specified to declare the function, but there isn't
# such a header file.
#
# So we use check_c_source_compiles().
#
check_c_source_compiles(
"int
main(void)
{
int i = 17;
return __atomic_load_n(&i, __ATOMIC_RELAXED);
}
"
HAVE___ATOMIC_LOAD_N)
check_c_source_compiles(
"int
main(void)
{
int i;
__atomic_store_n(&i, 17, __ATOMIC_RELAXED);
return 0;
}
"
HAVE___ATOMIC_STORE_N)

#
# Now check for various system functions.
#
check_function_exists(strerror_r HAVE_STRERROR_R)
if(HAVE_STRERROR_R)
#
# We have strerror_r; if we define _GNU_SOURCE, is it a
# POSIX-compliant strerror_r() or a GNU strerror_r()?
#
check_c_source_compiles(
"#define _GNU_SOURCE
#include <string.h>

/* Define it GNU-style; that will cause an error if it's not GNU-style */
extern char *strerror_r(int, char *, size_t);

int
main(void)
{
return 0;
}
"
HAVE_GNU_STRERROR_R)
if(NOT HAVE_GNU_STRERROR_R)
set(HAVE_POSIX_STRERROR_R YES)
endif(NOT HAVE_GNU_STRERROR_R)
else(HAVE_STRERROR_R)
#
# We don't have strerror_r; do we have _wcserror_s?
#
check_function_exists(_wcserror_s HAVE__WCSERROR_S)
endif(HAVE_STRERROR_R)

#
# Make sure we have vsnprintf() and snprintf(); we require them.
# We use check_symbol_exists(), as they aren't necessarily external
# functions - in Visual Studio, for example, they're inline functions
# calling a common external function.
#
check_symbol_exists(vsnprintf "stdio.h" HAVE_VSNPRINTF)
if(NOT HAVE_VSNPRINTF)
message(FATAL_ERROR "vsnprintf() is required but wasn't found")
endif(NOT HAVE_VSNPRINTF)
check_symbol_exists(snprintf "stdio.h" HAVE_SNPRINTF)
if(NOT HAVE_SNPRINTF)
message(FATAL_ERROR "snprintf() is required but wasn't found")
endif()

check_function_exists(strlcpy HAVE_STRLCPY)
check_function_exists(strlcat HAVE_STRLCAT)
check_function_exists(asprintf HAVE_ASPRINTF)
check_function_exists(vasprintf HAVE_VASPRINTF)
check_function_exists(strtok_r HAVE_STRTOK_R)
if(NOT WIN32)
check_function_exists(vsyslog HAVE_VSYSLOG)
endif()

#
# Look for various networking-related libraries that we may need.
#
# We need getaddrinfo() to translate host names in filters to IP
# addresses. We use getaddrinfo() because we want a portable
# thread-safe way of getting information for a host name or port;
# there exist _r versions of gethostbyname() and getservbyname() on
# some platforms, but not on all platforms.
#
# We may also need socket() and other socket functions to support:
#
# Local packet capture with capture mechanisms that use sockets.
#
# Local capture device enumeration if a socket call is needed to
# enumerate devices or get device attributes.
#
# Packet capture from services that put captured packets on the
# network, such as rpcap servers.
#
# We may also need getnameinfo() for packet capture from services
# that put packets on the network.
#
set(PCAP_LINK_LIBRARIES "")
set(LIBS "")
set(LIBS_STATIC "")
set(REQUIRES_PRIVATE "")
set(LIBS_PRIVATE "")
include(CheckLibraryExists)
if(WIN32)
#
# Windows.
#
# We need winsock2.h and ws2tcpip.h.
#
# On Windows, getaddrinfo() is in the ws2_32 library.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ws2_32)
check_symbol_exists(getaddrinfo "winsock2.h;ws2tcpip.h" LIBWS2_32_HAS_GETADDRINFO)
cmake_pop_check_state()
if(LIBWS2_32_HAS_GETADDRINFO)
set(PCAP_LINK_LIBRARIES ws2_32 ${PCAP_LINK_LIBRARIES})
else(LIBWS2_32_HAS_GETADDRINFO)
message(FATAL_ERROR "getaddrinfo is required, but wasn't found")
endif(LIBWS2_32_HAS_GETADDRINFO)
else(WIN32)
#
# UN*X.
#
# Most UN*Xes have getaddrinfo(), and the other routines we may
# need, in the default searched libraries (e.g., libc).
# Check there first.
#
# NOTE: if you hand check_library_exists as its last argument a
# variable that's been set, it skips the test, so we need different
# variables for different libraries.
#
check_function_exists(getaddrinfo STDLIBS_HAVE_GETADDRINFO)
if(NOT STDLIBS_HAVE_GETADDRINFO)
#
# Not found in the standard system libraries.
#
# In some versions of Solaris, we need to link with libsocket
# and libnsl, so check in libsocket and also link with liblnsl
# when doing this test.
#
# Linking with libsocket and libnsl will find all the routines
# we need.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES nsl)
check_library_exists(socket getaddrinfo "" LIBSOCKET_HAS_GETADDRINFO)
cmake_pop_check_state()
if(LIBSOCKET_HAS_GETADDRINFO)
#
# OK, we found it in libsocket.
#
set(PCAP_LINK_LIBRARIES socket nsl ${PCAP_LINK_LIBRARIES})
set(LIBS "-lsocket -lnsl ${LIBS}")
set(LIBS_STATIC "-lsocket -lnsl ${LIBS_STATIC}")
set(LIBS_PRIVATE "-lsocket -lnsl ${LIBS_PRIVATE}")
else(LIBSOCKET_HAS_GETADDRINFO)
#
# Not found in libsocket; test for it in libnetwork, which
# is where it is in Haiku.
#
# Linking with libnetwork will find all the routines we
# need.
#
check_library_exists(network getaddrinfo "" LIBNETWORK_HAS_GETADDRINFO)
if(LIBNETWORK_HAS_GETADDRINFO)
#
# OK, we found it in libnetwork.
#
set(PCAP_LINK_LIBRARIES network ${PCAP_LINK_LIBRARIES})
set(LIBS "-lnetwork ${LIBS}")
set(LIBS_STATIC "-lnetwork ${LIBS_STATIC}")
set(LIBS_PRIVATE "-lnetwork ${LIBS_PRIVATE}")
else(LIBNETWORK_HAS_GETADDRINFO)
#
# We didn't find it.
#
message(FATAL_ERROR "getaddrinfo is required, but wasn't found")
endif(LIBNETWORK_HAS_GETADDRINFO)
endif(LIBSOCKET_HAS_GETADDRINFO)

#
# We require a version of recvmsg() that conforms to the Single
# UNIX Specification, so that we can check whether a datagram
# received with recvmsg() was truncated when received due to the
# buffer being too small.
#
# On most systems, the version of recvmsg() in the libraries
# found above conforms to the SUS.
#
# On at least some versions of Solaris, it does not conform to
# the SUS, and we need the version in libxnet, which does
# conform.
#
# Check whether libxnet exists and has a version of recvmsg();
# if it does, link with libxnet before we link with libsocket,
# to get that version.
#
# This test also links with libsocket and libnsl.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES socket nsl)
check_library_exists(xnet recvmsg "" LIBXNET_HAS_RECVMSG)
cmake_pop_check_state()
if(LIBXNET_HAS_RECVMSG)
#
# libxnet has recvmsg(); link with it as well.
#
set(PCAP_LINK_LIBRARIES xnet ${PCAP_LINK_LIBRARIES})
set(LIBSC "-lxnet ${LIBS_LIBS}")
set(LIBS_STATIC "-lxnet ${LIBS_STATIC}")
set(LIBS_PRIVATE "-lxnet ${LIBS_PRIVATE}")
endif(LIBXNET_HAS_RECVMSG)
endif(NOT STDLIBS_HAVE_GETADDRINFO)

#
# DLPI needs putmsg under HP-UX, so test for -lstr while we're at it.
#
check_function_exists(putmsg STDLIBS_HAVE_PUTMSG)
if(NOT STDLIBS_HAVE_PUTMSG)
check_library_exists(str putmsg "" LIBSTR_HAS_PUTMSG)
if(LIBSTR_HAS_PUTMSG)
set(PCAP_LINK_LIBRARIES str ${PCAP_LINK_LIBRARIES})
set(LIBS "-lstr ${LIBS}")
set(LIBS_STATIC "-lstr ${LIBS_STATIC}")
set(LIBS_PRIVATE "-lstr ${LIBS_PRIVATE}")
endif(LIBSTR_HAS_PUTMSG)
endif(NOT STDLIBS_HAVE_PUTMSG)

# Haiku has getpass in libbsd
check_function_exists(getpass STDLIBS_HAVE_GETPASS)
if(NOT STDLIBS_HAVE_GETPASS)
check_library_exists(bsd getpass "" LIBBSD_HAS_GETPASS)
if(LIBBSD_HAS_GETPASS)
set(PCAP_LINK_LIBRARIES bsd ${PCAP_LINK_LIBRARIES})
endif(LIBBSD_HAS_GETPASS)
endif(NOT STDLIBS_HAVE_GETPASS)
endif(WIN32)

#
# Check for reentrant versions of getnetbyname_r(), as provided by
# Linux (glibc), Solaris/IRIX, and AIX (with three different APIs!).
# If we don't find one, we just use getnetbyname(), which uses
# thread-specific data on many platforms, but doesn't use it on
# NetBSD or OpenBSD, and may not use it on older versions of other
# platforms.
#
# Only do the check if we have a declaration of getnetbyname_r();
# without it, we can't check which API it has. (We assume that
# if there's a declaration, it has a prototype, so that the API
# can be checked.)
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
check_symbol_exists(getnetbyname_r netdb.h NETDB_H_DECLARES_GETNETBYNAME_R)
if(NETDB_H_DECLARES_GETNETBYNAME_R)
check_c_source_compiles(
"#include <netdb.h>

int
main(void)
{
struct netent netent_buf;
char buf[1024];
struct netent *resultp;
int h_errnoval;

return getnetbyname_r((const char *)0, &netent_buf, buf, sizeof buf, &resultp, &h_errnoval);
}
"
HAVE_LINUX_GETNETBYNAME_R)
if(NOT HAVE_LINUX_GETNETBYNAME_R)
check_c_source_compiles(
"#include <netdb.h>

int
main(void)
{
struct netent netent_buf;
char buf[1024];

return getnetbyname_r((const char *)0, &netent_buf, buf, (int)sizeof buf) != NULL;
}
"
HAVE_SOLARIS_IRIX_GETNETBYNAME_R)
if(NOT HAVE_SOLARIS_IRIX_GETNETBYNAME_R)
check_c_source_compiles(
"#include <netdb.h>

int
main(void)
{
struct netent netent_buf;
struct netent_data net_data;

return getnetbyname_r((const char *)0, &netent_buf, &net_data);
}
"
HAVE_AIX_GETNETBYNAME_R)
endif(NOT HAVE_SOLARIS_IRIX_GETNETBYNAME_R)
endif(NOT HAVE_LINUX_GETNETBYNAME_R)
endif(NETDB_H_DECLARES_GETNETBYNAME_R)
cmake_pop_check_state()

#
# Check for reentrant versions of getprotobyname_r(), as provided by
# Linux (glibc), Solaris/IRIX, and AIX (with three different APIs!).
# If we don't find one, we just use getprotobyname(), which uses
# thread-specific data on many platforms, but doesn't use it on
# NetBSD or OpenBSD, and may not use it on older versions of other
# platforms.
#
# Only do the check if we have a declaration of getprotobyname_r();
# without it, we can't check which API it has. (We assume that
# if there's a declaration, it has a prototype, so that the API
# can be checked.)
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
check_symbol_exists(getprotobyname_r netdb.h NETDB_H_DECLARES_GETPROTOBYNAME_R)
if(NETDB_H_DECLARES_GETPROTOBYNAME_R)
check_c_source_compiles(
"#include <netdb.h>

int
main(void)
{
struct protoent protoent_buf;
char buf[1024];
struct protoent *resultp;

return getprotobyname_r((const char *)0, &protoent_buf, buf, sizeof buf, &resultp);
}
"
HAVE_LINUX_GETPROTOBYNAME_R)
if(NOT HAVE_LINUX_GETPROTOBYNAME_R)
check_c_source_compiles(
"#include <netdb.h>

int
main(void)
{
struct protoent protoent_buf;
char buf[1024];

return getprotobyname_r((const char *)0, &protoent_buf, buf, (int)sizeof buf) != NULL;
}
"
HAVE_SOLARIS_IRIX_GETPROTOBYNAME_R)
if(NOT HAVE_SOLARIS_IRIX_GETPROTOBYNAME_R)
check_c_source_compiles(
"#include <netdb.h>

int
main(void)
{
struct protoent protoent_buf;
struct protoent_data proto_data;

return getprotobyname_r((const char *)0, &protoent_buf, &proto_data);
}
"
HAVE_AIX_GETPROTOBYNAME_R)
endif(NOT HAVE_SOLARIS_IRIX_GETPROTOBYNAME_R)
endif(NOT HAVE_LINUX_GETPROTOBYNAME_R)
endif(NETDB_H_DECLARES_GETPROTOBYNAME_R)
cmake_pop_check_state()

#
# Data types.
#
# XXX - there's no check_type() macro that's like check_type_size()
# except that it only checks for the existence of the structure type,
# so we use check_type_size() and ignore the size.
#
cmake_push_check_state()
if(WIN32)
set(CMAKE_EXTRA_INCLUDE_FILES winsock2.h)
else(WIN32)
set(CMAKE_EXTRA_INCLUDE_FILES unistd.h sys/socket.h)
endif(WIN32)
check_type_size("struct sockaddr_storage" STRUCT_SOCKADDR_STORAGE)
check_type_size("socklen_t" SOCKLEN_T)
cmake_pop_check_state()

#
# Structure fields.
#
if(WIN32)
check_struct_has_member("struct sockaddr" sa_len winsock2.h HAVE_STRUCT_SOCKADDR_SA_LEN)
else(WIN32)
check_struct_has_member("struct sockaddr" sa_len sys/socket.h HAVE_STRUCT_SOCKADDR_SA_LEN)
endif(WIN32)

#
# Do we have ffs(), and is it declared in <strings.h>?
#
check_function_exists(ffs HAVE_FFS)
if(HAVE_FFS)
#
# OK, we have ffs(). Is it declared in <strings.h>?
#
# This test fails if we don't have <strings.h> or if we do
# but it doesn't declare ffs().
#
check_symbol_exists(ffs strings.h STRINGS_H_DECLARES_FFS)
endif()

#
# This requires the libraries that we require, as ether_hostton might be
# in one of those libraries. That means we have to do this after
# we check for those libraries.
#
# You are in a twisty little maze of UN*Xes, all different.
# Some might not have ether_hostton().
# Some might have it and declare it in <net/ethernet.h>.
# Some might have it and declare it in <netinet/ether.h>
# Some might have it and declare it in <sys/ethernet.h>.
# Some might have it and declare it in <arpa/inet.h>.
# Some might have it and declare it in <netinet/if_ether.h>.
# Some might have it and not declare it in any header file.
#
# Before you is a C compiler.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
check_function_exists(ether_hostton HAVE_ETHER_HOSTTON)
if(HAVE_ETHER_HOSTTON)
#
# OK, we have ether_hostton(). Is it declared in <net/ethernet.h>?
#
# This test fails if we don't have <net/ethernet.h> or if we do
# but it doesn't declare ether_hostton().
#
check_symbol_exists(ether_hostton net/ethernet.h NET_ETHERNET_H_DECLARES_ETHER_HOSTTON)
if(NET_ETHERNET_H_DECLARES_ETHER_HOSTTON)
#
# Yes - we have it declared.
#
set(HAVE_DECL_ETHER_HOSTTON TRUE)
endif()
#
# Did that succeed?
#
if(NOT HAVE_DECL_ETHER_HOSTTON)
#
# No - how about <netinet/ether.h>, as on Linux?
#
# This test fails if we don't have <netinet/ether.h>
# or if we do but it doesn't declare ether_hostton().
#
check_symbol_exists(ether_hostton netinet/ether.h NETINET_ETHER_H_DECLARES_ETHER_HOSTTON)
if(NETINET_ETHER_H_DECLARES_ETHER_HOSTTON)
#
# Yes - we have it declared.
#
set(HAVE_DECL_ETHER_HOSTTON TRUE)
endif()
endif()
#
# Did that succeed?
#
if(NOT HAVE_DECL_ETHER_HOSTTON)
#
# No - how about <sys/ethernet.h>, as on Solaris 10 and later?
#
# This test fails if we don't have <sys/ethernet.h>
# or if we do but it doesn't declare ether_hostton().
#
check_symbol_exists(ether_hostton sys/ethernet.h SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON)
if(SYS_ETHERNET_H_DECLARES_ETHER_HOSTTON)
#
# Yes - we have it declared.
#
set(HAVE_DECL_ETHER_HOSTTON TRUE)
endif()
endif()
#
# Did that succeed?
#
if(NOT HAVE_DECL_ETHER_HOSTTON)
#
# No, how about <arpa/inet.h>, as on AIX?
#
# This test fails if we don't have <arpa/inet.h>
# or if we do but it doesn't declare ether_hostton().
#
check_symbol_exists(ether_hostton arpa/inet.h ARPA_INET_H_DECLARES_ETHER_HOSTTON)
if(ARPA_INET_H_DECLARES_ETHER_HOSTTON)
#
# Yes - we have it declared.
#
set(HAVE_DECL_ETHER_HOSTTON TRUE)
endif()
endif()
#
# Did that succeed?
#
if(NOT HAVE_DECL_ETHER_HOSTTON)
#
# No, how about <netinet/if_ether.h>?
# On some platforms, it requires <net/if.h> and
# <netinet/in.h>, and we always include it with
# both of them, so test it with both of them.
#
# This test fails if we don't have <netinet/if_ether.h>
# and the headers we include before it, or if we do but
# <netinet/if_ether.h> doesn't declare ether_hostton().
#
check_symbol_exists(ether_hostton "sys/types.h;sys/socket.h;net/if.h;netinet/in.h;netinet/if_ether.h" NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON)
if(NETINET_IF_ETHER_H_DECLARES_ETHER_HOSTTON)
#
# Yes - we have it declared.
#
set(HAVE_DECL_ETHER_HOSTTON TRUE)
endif()
endif()
#
# After all that, is ether_hostton() declared?
#
if(NOT HAVE_DECL_ETHER_HOSTTON)
#
# No, we'll have to declare it ourselves.
# Do we have "struct ether_addr" if we include <netinet/if_ether.h>?
#
# XXX - there's no check_type() macro that's like check_type_size()
# except that it only checks for the existence of the structure type,
# so we use check_type_size() and ignore the size.
#
cmake_push_check_state()
set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/socket.h net/if.h netinet/in.h netinet/if_ether.h)
check_type_size("struct ether_addr" STRUCT_ETHER_ADDR)
cmake_pop_check_state()
endif()
endif()
cmake_pop_check_state()

#
# Large file support on UN*X, a/k/a LFS.
#
if(NOT WIN32)
include(FindLFS)
if(LFS_FOUND)
#
# Add the required #defines.
#
add_definitions(${LFS_DEFINITIONS})
endif()

#
# Check for fseeko as well.
#
include(FindFseeko)
if(FSEEKO_FOUND)
set(HAVE_FSEEKO ON)

#
# Add the required #defines.
#
add_definitions(${FSEEKO_DEFINITIONS})
endif()
endif()

if(INET6)
message(STATUS "Support IPv6")
endif(INET6)

#
# Pthreads.
# We might need them, because some libraries we use might use them,
# but we don't necessarily need them.
# That's only on UN*X; on Windows, if they use threads, we assume
# they're native Windows threads.
#
if(NOT WIN32)
set(CMAKE_THREAD_PREFER_PTHREAD ON)
find_package(Threads)
if(NOT CMAKE_USE_PTHREADS_INIT)
#
# If it's not pthreads, we won't use it; we use it for libraries
# that require it.
#
set(CMAKE_THREAD_LIBS_INIT "")
endif(NOT CMAKE_USE_PTHREADS_INIT)
endif(NOT WIN32)

if(ENABLE_PROFILING)
if(NOT MSVC)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pg")
endif()
endif()

#
# Based on
#
# https://github.com/commonmark/cmark/blob/master/FindAsan.cmake
#
# The MIT License (MIT)
#
# Copyright (c) 2013 Matthew Arsenault
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# Test if the each of the sanitizers in the ENABLE_SANITIZERS list are
# supported by the compiler, and, if so, adds the appropriate flags to
# CMAKE_C_FLAGS, and SANITIZER_FLAGS. If not, it fails.
#
# Do this last, in the hope that it will prevent configuration on Linux
# from somehow deciding it doesn't need -lpthread when building rpcapd
# (it does require it, but somehow, in some mysterious fashion that no
# obvious CMake debugging flag reveals, it doesn't realize that if we
# turn sanitizer stuff on).
#
# Note: apparently, some projects have decided that ENABLE_SANITIZERS
# is a Boolean, with OFF meaning "no sanitizers" and ON meaning "all
# sanitizers". Whoever decided that didn't put it up as a common
# CMake idiom, as far as I can tell; we only discovered this because
# JetBrains' CLion "helpfully" appears to pass -DENABLE_SANITIZERS=OFF
# to CMake by default, which causes CMake to fail on libpcap. Thanks!
#
# We thus also allow a setting of OFF to mean "no sanitizers" and ON to
# mean "all supported sanitizers that we know about and that can all
# be used together".
#
macro(test_sanitizer _sanitizer _sanitizer_flag)
message(STATUS "Checking sanitizer ${_sanitizer}")
set(sanitizer_variable "sanitize_${_sanitizer}")
# Set -Werror to catch "argument unused during compilation" warnings
set(CMAKE_REQUIRED_FLAGS "-Werror -fsanitize=${_sanitizer}")
check_c_compiler_flag("-fsanitize=${_sanitizer}" ${sanitizer_variable})
if(${${sanitizer_variable}})
set(${_sanitizer_flag} "-fsanitize=${_sanitizer}")
else()
#
# Try the versions supported prior to Clang 3.2.
# If the sanitizer is "address", try -fsanitize-address.
# If it's "undefined", try -fcatch-undefined-behavior.
# Otherwise, give up.
#
set(sanitizer_variable "OLD_${sanitizer_variable}")
if ("${_sanitizer}" STREQUAL "address")
set(CMAKE_REQUIRED_FLAGS "-Werror -fsanitize-address")
check_c_compiler_flag("-fsanitize-address" ${sanitizer_variable})
if(${${sanitizer_variable}})
set(${_sanitizer_flag} "-fsanitize-address")
endif()
elseif("${_sanitizer}" STREQUAL "undefined")
set(CMAKE_REQUIRED_FLAGS "-Werror -fcatch-undefined-behavior")
check_c_compiler_flag("-fcatch-undefined-behavior" ${sanitizer_variable})
if(${${sanitizer_variable}})
set(${_sanitizer_flag} "-fcatch-undefined-behavior")
endif()
endif()
endif()
unset(CMAKE_REQUIRED_FLAGS)
endmacro(test_sanitizer)

set(SANITIZER_FLAGS "")
if("${ENABLE_SANITIZERS}")
#
# This appears to indicate that ENABLE_SANITIZERS was set to a
# string value that is "one of the true constants", meaning
# "1, ON, YES, TRUE, Y, or a non-zero number".
#
# It does not appear to happen for other settings, including
# setting it to a list of one or more sanitizers.
#
# This setting means "enable all sanitizers that the compiler
# supports".
#
foreach(sanitizer "address" "undefined")
unset(SANITIZER_FLAG)
test_sanitizer(${sanitizer} SANITIZER_FLAG)
if(SANITIZER_FLAG)
message(STATUS "${sanitizer} sanitizer supported using ${SANITIZER_FLAG}")
set(SANITIZER_FLAGS "${SANITIZER_FLAGS} ${SANITIZER_FLAG}")
else()
message(STATUS "${sanitizer} isn't a supported sanitizer")
endif()
endforeach()
if("${SANITIZER_FLAGS}" STREQUAL "")
message(FATAL_ERROR "No supported sanitizers found")
endif()
else()
#
# This appears to indicate that ENABLE_SANITIZERS was either:
#
# not set;
# set to a set to a string value that is not "one of the true
# constants", meaning "1, ON, YES, TRUE, Y, or a non-zero number".
#
# The latter includes setting it to "one of the false constants",
# meaning the string "is 0, OFF, NO, FALSE, N, IGNORE, NOTFOUND,
# the empty string, or ends in the suffix -NOTFOUND."
#
# It also includes setting it to a list of one or more sanitizers.
#
# We want to treat "not set" and "set to one of the false constants"
# as meaning "do not enable any sanitizers".
#
# We want to treat "set to a list of one or more sanitizers" as
# meaning "enable all the sanitizers in the list".
#
# This requires that we distinguish between those two cases.
#
if(ENABLE_SANITIZERS)
#
# This appears to indicate that ENABLE_SANITIZERS was set to
# a string value that is "not one of the false constants".
#
# We already know it's "not one of the true constants", so
# we treat it as a list of sanitizers.
#
foreach(sanitizer IN LISTS ENABLE_SANITIZERS)
unset(SANITIZER_FLAG)
test_sanitizer(${sanitizer} SANITIZER_FLAG)
if(SANITIZER_FLAG)
message(STATUS "${sanitizer} sanitizer supported using ${SANITIZER_FLAG}")
set(SANITIZER_FLAGS "${SANITIZER_FLAGS} ${SANITIZER_FLAG}")
else()
message(FATAL_ERROR "${sanitizer} isn't a supported sanitizer")
endif()
endforeach()
else()
#
# This appears to indicate that ENABLE_SANITIZERS was either:
#
# not set;
# set to a value that's "one of the false constants";
#
# so we don't enable any sanitizers.
#
message(STATUS "Not enabling sanitizers")
endif()
endif()

if(NOT "${SANITIZER_FLAGS}" STREQUAL "")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O1 -g ${SANITIZER_FLAGS} -fno-omit-frame-pointer -fno-optimize-sibling-calls")
endif()

if(ENABLE_REMOTE)
#
# OpenSSL/libressl.
#
find_package(OpenSSL)
if(OPENSSL_FOUND)
#
# We have OpenSSL.
#
include_directories(SYSTEM ${OPENSSL_INCLUDE_DIR})
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${OPENSSL_LIBRARIES})

#
# The find_package() module CMake provides for OpenSSL uses does not
# give us a defined indication of whether it found OpenSSL with
# pkg-config or not. We need to know that as, if it was found with
# pkg-config, we should set the Requires.private value in libpcap.pc
# to include its package name, openssl, otherwise we should add the
# names for the static libraries to Libs.private.
#
# On UN*X, FindOpenSSL happens to use pkg-config to find OpenSSL, but
# it doesn't appear to be documented as doing so; therefore, we don't
# assume that, if we got here, we have pkg-config.
#
# So we use pkg_get_link_info() to run pkg-config ourselves, both
# because FindOpenSSL doesn't set the OPENSSL_LDFLAGS or
# OPENSSL_STATIC_LDFLAGS variables and because, for reasons explained
# in the comment before the pkg_get_link_info() macro, even if it did,
# it wouldn't be what we want anyway.
#
if (PKG_CONFIG_EXECUTABLE)
pkg_get_link_info(OPENSSL openssl)
if (OPENSSL_FOUND_WITH_PKG_CONFIG)
#
# pkg-config failed; assume that means that there is no openssl
# package for it to find. Just add OPENSSL_LIBRARIES to
# LIBS_PRIVATE AND LIBS_STATIC, as that's the
# best we can do. XXX - need list of -l and -L flags to add....
#
set(LIBS "${LIBS} ${OPENSSL_LIBS}")
set(LIBS_STATIC "${LIBS_STATIC} ${OPENSSL_LIBS_STATIC}")
set(REQUIRES_PRIVATE "${REQUIRES_PRIVATE} ${OPENSSL_PACKAGE_NAME}")
endif()
else()
# Get it from OPENSSL_LIBRARIES
foreach(_lib IN LISTS OPENSSL_LIBRARIES)
#
# Get the directory in which the library resides.
#
get_filename_component(_lib_directory "${_lib}" DIRECTORY)

#
# Is the library directory in CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES?
# (See comment above on why we use that.)
#
list(FIND CMAKE_PLATFORM_IMPLICIT_LINK_DIRECTORIES "${_lib_directory}" _lib_index)
if(_lib_index EQUAL -1)
#
# No, so add a -L flag to get the linker to search in that
# directory.
#
set(LIBS "${LIBS} -L${_lib_directory}")
set(LIBS_STATIC "${LIBS_STATIC} -L${_lib_directory}")
set(LIBS_PRIVATE "${LIBS_PRIVATE} -L${_lib_directory}")
endif()

#
# Get the file name of the library, without the extension.
#
get_filename_component(_lib_filename "${_lib}" NAME_WE)

#
# Strip off the "lib" prefix to get the library name, and
# add a -l flag based on that.
#
string(REGEX REPLACE "^lib" "" _library_name "${_lib_filename}")
set(LIBS "${LIBS} -l${_library_name}")
set(LIBS_STATIC "${LIBS_STATIC} -l${_library_name}")
set(LIBS_PRIVATE "${LIBS_PRIVATE} -l${_library_name}")
endforeach()
endif()
set(HAVE_OPENSSL YES)
endif(OPENSSL_FOUND)
endif(ENABLE_REMOTE)

#
# On macOS, build libpcap for the appropriate architectures, if
# CMAKE_OSX_ARCHITECTURES isn't set (if it is, let that control
# the architectures for which to build it).
#
if(APPLE AND "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
#
# Get the major version of Darwin.
#
string(REGEX MATCH "^([0-9]+)" SYSTEM_VERSION_MAJOR "${CMAKE_SYSTEM_VERSION}")

if(SYSTEM_VERSION_MAJOR LESS 8)
#
# Pre-Tiger.
#
# Build libraries and executables only for 32-bit PowerPC, as
# that's all that is supported.
#
set(OSX_LIBRARY_ARCHITECTURES "ppc")
set(OSX_EXECUTABLE_ARCHITECTURES "ppc")
elseif(SYSTEM_VERSION_MAJOR EQUAL 8)
#
# Tiger. Is this prior to, or with, Intel support?
#
# Get the minor version of Darwin.
#
string(REPLACE "${SYSTEM_VERSION_MAJOR}." "" SYSTEM_MINOR_AND_PATCH_VERSION ${CMAKE_SYSTEM_VERSION})
string(REGEX MATCH "^([0-9]+)" SYSTEM_VERSION_MINOR "${SYSTEM_MINOR_AND_PATCH_VERSION}")
if(SYSTEM_VERSION_MINOR LESS 4)
#
# Prior to Intel support.
#
# Build libraries and executables for 32-bit PowerPC and
# 64-bit PowerPC, with 32-bit PowerPC first, as those
# are both supported. (I'm guessing that's what Apple
# does.)
#
set(OSX_LIBRARY_ARCHITECTURES "ppc;ppc64")
set(OSX_EXECUTABLE_ARCHITECTURES "ppc;ppc64")
elseif(SYSTEM_VERSION_MINOR LESS 7)
#
# With Intel support but prior to x86-64 support.
#
# Build for 32-bit PowerPC, 64-bit PowerPC, and 32-bit x86,
# with 32-bit PowerPC first, as those are all supported.
# (I'm guessing that's what Apple does.)
#
set(OSX_LIBRARY_ARCHITECTURES "ppc;ppc64;i386")
set(OSX_EXECUTABLE_ARCHITECTURES "ppc;ppc64;i386")
else()
#
# With Intel support including x86-64 support.
#
# Build for 32-bit PowerPC, 64-bit PowerPC, 32-bit x86,
# and x86-64, with 32-bit PowerPC first, as those are
# all supported. (I'm guessing that's what Apple does.)
#
set(OSX_LIBRARY_ARCHITECTURES "ppc;ppc64;i386;x86_64")
set(OSX_EXECUTABLE_ARCHITECTURES "ppc;ppc64;i386;x86_64")
endif()
elseif(SYSTEM_VERSION_MAJOR EQUAL 9)
#
# Leopard.
#
# Build libraries and executables for 32-bit PowerPC, 64-bit
# PowerPC, 32-bit x86, and x86-64, with 32-bit PowerPC
# first, as those are all supported. (That's what Apple
# does.)
#
set(OSX_LIBRARY_ARCHITECTURES "ppc;ppc64;i386;x86_64")
set(OSX_EXECUTABLE_ARCHITECTURES "ppc;ppc64;i386;x86_64")
elseif(SYSTEM_VERSION_MAJOR EQUAL 10)
#
# Snow Leopard.
#
# Build libraries for x86-64, 32-bit x86, and 32-bit PowerPC,
# with x86-64 first, because 32-bit PowerPC executables are
# supported with Rosetta. (That's what Apple does, even though
# Snow Leopard doesn't run on PPC, so PPC libpcap runs under
# Rosetta, and Rosetta doesn't support BPF ioctls, so PPC
# executables can't do live captures.)
#
set(OSX_LIBRARY_ARCHITECTURES "x86_64;i386;ppc")

#
# Build executables only for 32-bit x86 and 64-bit x86, as PPC
# machines are no longer supported.
#
set(OSX_EXECUTABLE_ARCHITECTURES "x86_64;i386")
elseif(SYSTEM_VERSION_MAJOR GREATER 10 AND SYSTEM_VERSION_MAJOR LESS 19)
#
# Post-Snow Leopard, pre-Catalina.
#
# Build libraries for 64-bit x86 and 32-bit x86, with 64-bit x86
# first, as PPC machines are no longer supported, but 32-bit
# x86 executables are. (That's what Apple does.)
#
# First, check whether we're building with OpenSSL.
# If so, don't bother trying to build fat.
#
if(HAVE_OPENSSL)
set(X86_32_BIT_SUPPORTED NO)
set(OSX_LIBRARY_ARCHITECTURES "x86_64")
set(OSX_EXECUTABLE_ARCHITECTURES "x86_64")
message(WARNING "We're assuming the OpenSSL libraries are 64-bit only, so we're not compiling for 32-bit x86")
else()
#
# Now, check whether we *can* build for i386.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_FLAGS "-arch i386")
check_c_source_compiles(
"int
main(void)
{
return 0;
}
"
X86_32_BIT_SUPPORTED)
cmake_pop_check_state()
if(X86_32_BIT_SUPPORTED)
set(OSX_LIBRARY_ARCHITECTURES "x86_64;i386")
else()
set(OSX_LIBRARY_ARCHITECTURES "x86_64")
#
# We can't build fat; suggest that the user install the
# /usr/include headers if they want to build fat.
#
if(SYSTEM_VERSION_MAJOR LESS 18)
#
# Pre-Mojave; the command-line tools should be sufficient to
# enable 32-bit x86 builds.
#
message(WARNING "Compiling for 32-bit x86 gives an error; try installing the command-line tools")
else()
message(WARNING "Compiling for 32-bit x86 gives an error; try installing the command-line tools and, after that, installing the /usr/include headers from the /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg package")
endif()
endif()
endif()

#
# Build executables only for 64-bit x86, as 32-bit x86 machines
# are no longer supported.
#
set(OSX_EXECUTABLE_ARCHITECTURES "x86_64")
elseif(SYSTEM_VERSION_MAJOR EQUAL 19)
#
# Catalina.
#
# Build libraries and executables only for x86-64, as 32-bit
# executables are no longer supported. (That's what Apple
# does.)
#
set(OSX_LIBRARY_ARCHITECTURES "x86_64")
set(OSX_EXECUTABLE_ARCHITECTURES "x86_64")
else()
#
# Post-Catalina. Build libraries and
# executables for x86-64 and ARM64.
# (That's what Apple does, except they
# build for arm64e, which may include
# some of the pointer-checking extensions.)
#
# If we're building with libssl, make sure
# we can build fat with it (i.e., that it
# was built fat); if we can't, don't set
# the target architectures, and just
# build for the host we're on.
#
# Otherwise, just add both of them.
#
if(HAVE_OPENSSL)
cmake_push_check_state()
set(CMAKE_REQUIRED_FLAGS "-arch x86_64 -arch arm64")
set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
set(CMAKE_REQUIRED_LIBRARIES ${OPENSSL_LIBRARIES})
#
# We must test whether this compiles and links, so
# check_symbol_exists() isn't sufficient.
#
# SSL_library_init() may be a macro that's #defined
# to be the real function to call, so we have to
# include <openssl/ssl.h>, and check_function_exists()
# isn't sufficient.
#
check_c_source_compiles(
"#include <openssl/ssl.h>
int
main(void)
{
SSL_library_init();
return 0;
}
"
FAT_SSL_BUILDS_SUPPORTED)
cmake_pop_check_state()
if(FAT_SSL_BUILDS_SUPPORTED)
set(OSX_LIBRARY_ARCHITECTURES "x86_64;arm64")
set(OSX_EXECUTABLE_ARCHITECTURES "x86_64;arm64")
endif()
else()
set(OSX_LIBRARY_ARCHITECTURES "x86_64;arm64")
set(OSX_EXECUTABLE_ARCHITECTURES "x86_64;arm64")
endif()
endif()
endif()

#
# Additional linker flags.
#
set(LINKER_FLAGS "${SANITIZER_FLAGS}")
if(ENABLE_PROFILING)
if(MSVC)
set(LINKER_FLAGS " /PROFILE")
else()
set(LINKER_FLAGS " -pg")
endif()
endif()

######################################
# Input files
######################################

set(PROJECT_SOURCE_LIST_C
bpf_dump.c
bpf_filter.c
bpf_image.c
etherent.c
fmtutils.c
gencode.c
nametoaddr.c
optimize.c
pcap-common.c
pcap-util.c
pcap.c
savefile.c
sf-pcapng.c
sf-pcap.c
)

if(WIN32)
#
# We add the character set conversion routines; they're Windows-only
# for now.
#
# We assume we don't have asprintf(), and provide an implementation
# that uses _vscprintf() to determine how big the string needs to be.
#
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C}
charconv.c missing/win_asprintf.c)
else()
if(NOT HAVE_ASPRINTF)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/asprintf.c)
endif()
if(NOT HAVE_STRLCAT)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/strlcat.c)
endif(NOT HAVE_STRLCAT)
if(NOT HAVE_STRLCPY)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/strlcpy.c)
endif(NOT HAVE_STRLCPY)
if(NOT HAVE_STRTOK_R)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} missing/strtok_r.c)
endif(NOT HAVE_STRTOK_R)
endif(WIN32)

#
# Determine the main pcap-XXX.c file to use, and the libraries with
# which we need to link libpcap, if any.
#
if(WIN32)
#
# Windows.
#
# Has the user explicitly specified a capture type?
#
if(PCAP_TYPE STREQUAL "")
#
# The user didn't explicitly specify a capture mechanism.
# Check whether we have packet.dll.
#
if(HAVE_PACKET32)
#
# We have packet.dll.
# Set the capture type to NPF.
#
set(PCAP_TYPE npf)
else()
#
# We don't have any capture type we know about.
# Report an error, and tell the user to configure with
# -DPCAP_TYPE=null if they want a libpcap that can't
# capture but that can read capture files. That way,
# nobody gets surprised by getting a no-capture
# libpcap without asking for that.
#
message(FATAL_ERROR "No supported packet capture interface was found.
In order to build a version of libpcap that supports packet capture
on Windows, you will need to install Npcap and the Npcap SDK, or
WinPcap and the WinPcap SDK, and run cmake with -DPacket_ROOT={path of SDK},
where {path of SDK} is the path name of the top-level directory of the SDK.
That argument may have to be quoted if the path contains blanks.
If you want a libpcap that cannot capture packets but that can read
pcap and pcapng files, run cmake with -DPCAP_TYPE=null.")
endif()
endif()
else()
#
# UN*X.
#
# Figure out what type of packet capture mechanism we have, and
# what libraries we'd need to link libpcap with, if any.
#

#
# Has the user explicitly specified a capture type?
#
if(PCAP_TYPE STREQUAL "")
#
# Check for a bunch of headers for various packet capture mechanisms.
#
check_include_files("sys/types.h;net/bpf.h" HAVE_NET_BPF_H)
if(HAVE_NET_BPF_H)
#
# Does it define BIOCSETIF?
# I.e., is it a header for an LBL/BSD-style capture
# mechanism, or is it just a header for a BPF filter
# engine? Some versions of Arch Linux, for example,
# have a net/bpf.h that doesn't define BIOCSETIF;
# as it's a Linux, it should use packet sockets,
# instead.
#
# We need:
#
# sys/types.h, because FreeBSD 10's net/bpf.h
# requires that various BSD-style integer types
# be defined;
#
# sys/time.h, because AIX 5.2 and 5.3's net/bpf.h
# doesn't include it but does use struct timeval
# in ioctl definitions;
#
# sys/ioctl.h and, if we have it, sys/ioccom.h,
# because net/bpf.h defines ioctls;
#
# net/if.h, because it defines some structures
# used in ioctls defined by net/bpf.h;
#
# sys/socket.h, because OpenBSD 5.9's net/bpf.h
# defines some structure fields as being
# struct sockaddrs;
#
# and net/bpf.h doesn't necessarily include all
# of those headers itself.
#
if(HAVE_SYS_IOCCOM_H)
check_symbol_exists(BIOCSETIF "sys/types.h;sys/time.h;sys/ioctl.h;sys/socket.h;sys/ioccom.h;net/bpf.h;net/if.h" BPF_H_DEFINES_BIOCSETIF)
else(HAVE_SYS_IOCCOM_H)
check_symbol_exists(BIOCSETIF "sys/types.h;sys/time.h;sys/ioctl.h;sys/socket.h;net/bpf.h;net/if.h" BPF_H_DEFINES_BIOCSETIF)
endif(HAVE_SYS_IOCCOM_H)
endif(HAVE_NET_BPF_H)
check_include_file(net/pfilt.h HAVE_NET_PFILT_H)
check_include_file(net/enet.h HAVE_NET_ENET_H)
check_include_file(net/nit.h HAVE_NET_NIT_H)
check_include_file(sys/net/nit.h HAVE_SYS_NET_NIT_H)
check_include_file(linux/socket.h HAVE_LINUX_SOCKET_H)
check_include_file(net/raw.h HAVE_NET_RAW_H)
check_include_file(sys/dlpi.h HAVE_SYS_DLPI_H)
check_include_file(config/HaikuConfig.h HAVE_CONFIG_HAIKUCONFIG_H)

if(BPF_H_DEFINES_BIOCSETIF)
#
# BPF.
# Check this before DLPI, so that we pick BPF on
# Solaris 11 and later.
#
set(PCAP_TYPE bpf)
elseif(HAVE_LINUX_SOCKET_H)
#
# No prizes for guessing this one.
#
set(PCAP_TYPE linux)
elseif(HAVE_NET_PFILT_H)
#
# DEC OSF/1, Digital UNIX, Tru64 UNIX
#
set(PCAP_TYPE pf)
elseif(HAVE_NET_ENET_H)
#
# Stanford Enetfilter.
#
set(PCAP_TYPE enet)
elseif(HAVE_NET_NIT_H)
#
# SunOS 4.x STREAMS NIT.
#
set(PCAP_TYPE snit)
elseif(HAVE_SYS_NET_NIT_H)
#
# Pre-SunOS 4.x non-STREAMS NIT.
#
set(PCAP_TYPE nit)
elseif(HAVE_NET_RAW_H)
#
# IRIX snoop.
#
set(PCAP_TYPE snoop)
elseif(HAVE_SYS_DLPI_H)
#
# DLPI on pre-Solaris 11 SunOS 5, HP-UX, possibly others.
#
set(PCAP_TYPE dlpi)
elseif(HAVE_CONFIG_HAIKUCONFIG_H)
#
# Haiku.
#
set(PCAP_TYPE haiku)
else()
#
# We don't have any capture type we know about.
# Report an error, and tell the user to configure with
# -DPCAP_TYPE=null if they want a libpcap that can't
# capture but that can read capture files. That way,
# nobody gets surprised by getting a no-capture
# libpcap without asking for that.
#
message(FATAL_ERROR "No supported packet capture interface was found.
See the INSTALL.md file for information on packet capture support in
various operating systems.
If you want a libpcap that cannot capture packets but that can read
pcap and pcapng files, run cmake with -DPCAP_TYPE=null.")
endif()
endif()
endif(WIN32)
message(STATUS "Packet capture mechanism type: ${PCAP_TYPE}")

find_package(PkgConfig QUIET)

#
# Do capture-mechanism-dependent tests.
#
if(WIN32)
if(PCAP_TYPE STREQUAL "npf")
#
# Link with packet.dll before Winsock2.
#
set(PCAP_LINK_LIBRARIES ${Packet_LIBRARIES} ${PCAP_LINK_LIBRARIES})
elseif(PCAP_TYPE STREQUAL "null")
else()
message(FATAL_ERROR "${PCAP_TYPE} is not a valid pcap type")
endif()
else(WIN32)
if(PCAP_TYPE STREQUAL "dlpi")
#
# Needed for common functions used by pcap-[dlpi,libdlpi].c
#
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} dlpisubs.c)

#
# Checks for some header files.
#
check_include_file(sys/bufmod.h HAVE_SYS_BUFMOD_H)
check_include_file(sys/dlpi_ext.h HAVE_SYS_DLPI_EXT_H)

#
# Checks to see if Solaris has the public libdlpi(3LIB) library.
# Note: The existence of /usr/include/libdlpi.h does not mean it is the
# public libdlpi(3LIB) version. Before libdlpi was made public, a
# private version also existed, which did not have the same APIs.
# Due to a gcc bug, the default search path for 32-bit libraries does
# not include /lib, we add it explicitly here.
# [http://bugs.opensolaris.org/view_bug.do?bug_id=6619485].
# Also, due to the bug above applications that link to libpcap with
# libdlpi will have to add "-L/lib" option to "configure".
#
cmake_push_check_state()
set(CMAKE_REQUIRED_FLAGS "-L/lib")
set(CMAKE_REQUIRED_LIBRARIES dlpi)
check_function_exists(dlpi_walk HAVE_LIBDLPI)
cmake_pop_check_state()
if(HAVE_LIBDLPI)
#
# XXX - add -L/lib
#
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} dlpi)
set(LIBS "${LIBS} -ldlpi")
set(LIBS_STATIC "${LIBS_STATIC} -ldlpi")
set(LIBS_PRIVATE "${LIBS_PRIVATE} -ldlpi")
set(PCAP_TYPE libdlpi)
endif()

#
# This check is for Solaris with DLPI support for passive modes.
# See dlpi(7P) for more details.
#
# XXX - there's no check_type() macro that's like check_type_size()
# except that it only checks for the existence of the structure type,
# so we use check_type_size() and ignore the size.
#
cmake_push_check_state()
set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/dlpi.h)
check_type_size(dl_passive_req_t DL_PASSIVE_REQ_T)
cmake_pop_check_state()
elseif(PCAP_TYPE STREQUAL "linux")
#
# Do we have the wireless extensions?
# linux/wireless.h requires sys/socket.h.
#
check_include_files("sys/socket.h;linux/wireless.h" HAVE_LINUX_WIRELESS_H)

#
# Do we have libnl?
# We only want version 3. Version 2 was, apparently,
# short-lived, and version 1 is source and binary
# incompatible with version 3, and it appears that,
# these days, everybody's using version 3. We're
# not supporting older versions of the Linux kernel;
# let's drop support for older versions of libnl, too.
#
if(BUILD_WITH_LIBNL)
pkg_check_modules(LIBNL libnl-genl-3.0)
if(LIBNL_FOUND)
set(PCAP_LINK_LIBRARIES ${LIBNL_LIBRARIES} ${PCAP_LINK_LIBRARIES})

#
# Get raw link flags from pkg-config.
#
pkg_get_link_info(LIBNL libnl-genl-3.0)
set(LIBS "${LIBNL_LIBS} ${LIBS}")
set(LIBS_STATIC "${LIBNL_LIBS_STATIC} ${LIBS_STATIC}")
set(REQUIRES_PRIVATE "${LIBNL_PACKAGE_NAME} ${REQUIRES_PRIVATE}")
else()
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES nl-3)
check_function_exists(nl_socket_alloc HAVE_LIBNL)
cmake_pop_check_state()
if(HAVE_LIBNL)
#
# Yes, we have libnl 3.x.
#
set(PCAP_LINK_LIBRARIES nl-genl-3 nl-3 ${PCAP_LINK_LIBRARIES})
include_directories("/usr/include/libnl3")
set(LIBS "-lnl-genl-3 -lnl-3 ${LIBS}")
set(LIBS_STATIC "-lnl-genl-3 -lnl-3 ${LIBS_STATIC}")
set(LIBS_PRIVATE "-lnl-genl-3 -lnl-3 ${LIBS_PRIVATE}")
endif()
endif()
else()
unset(HAVE_LIBNL CACHE) # check_function_exists stores results in cache
endif()

check_struct_has_member("struct tpacket_auxdata" tp_vlan_tci linux/if_packet.h HAVE_STRUCT_TPACKET_AUXDATA_TP_VLAN_TCI)
elseif(PCAP_TYPE STREQUAL "bpf")
#
# Check whether we have the *BSD-style ioctls.
#
check_include_files("sys/types.h;net/if_media.h" HAVE_NET_IF_MEDIA_H)

#
# Check whether we have struct BPF_TIMEVAL.
#
# XXX - there's no check_type() macro that's like check_type_size()
# except that it only checks for the existence of the structure type,
# so we use check_type_size() and ignore the size.
#
cmake_push_check_state()
if(HAVE_SYS_IOCCOM_H)
set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h sys/ioccom.h net/bpf.h)
check_type_size("struct BPF_TIMEVAL" STRUCT_BPF_TIMEVAL)
else()
set(CMAKE_EXTRA_INCLUDE_FILES sys/types.h net/bpf.h)
check_type_size("struct BPF_TIMEVAL" STRUCT_BPF_TIMEVAL)
endif()
cmake_pop_check_state()

#
# Check whether there's a inet/ipnet.h header and,
# if so, whether it defines IPNET_ANY_LINK - if so,
# we assume we have the "any" device (that's a
# Solaris header, and later versions of Solaris
# have an "any" device).
#
# Attempting to include it at compile time could
# be a pain, as it's a kernel header.
#
message(STATUS "Checking whether the Solaris \"any\" device is supported")
if(EXISTS /usr/include/inet/ipnet.h)
file(STRINGS /usr/include/inet/ipnet.h IPNET_ANY_LINK_LINES REGEX IPNET_ANY_LINK)
if(NOT IPNET_ANY_LINK_LINES STREQUAL "")
set(HAVE_SOLARIS_ANY_DEVICE TRUE)
endif()
endif()
if(HAVE_SOLARIS_ANY_DEVICE)
message(STATUS "Checking whether the Solaris \"any\" device is supported - supported")
else()
message(STATUS "Checking whether the Solaris \"any\" device is supported - not supported")
endif()
elseif(PCAP_TYPE STREQUAL "haiku")
#
# Check for some headers just in case.
#
check_include_files("net/if.h;net/if_dl.h;net/if_types.h" HAVE_NET_IF_TYPES_H)
set(PCAP_SRC pcap-${PCAP_TYPE}.c)
elseif(PCAP_TYPE STREQUAL "null")
else()
message(FATAL_ERROR "${PCAP_TYPE} is not a valid pcap type")
endif()
endif(WIN32)

if(NOT DEFINED PCAP_SRC)
set(PCAP_SRC pcap-${PCAP_TYPE}.c)
endif()

set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${PCAP_SRC})

#
# Now figure out how we get a list of interfaces and addresses,
# if we support capturing. Don't bother if we don't support
# capturing.
#
if(NOT WIN32)
#
# UN*X - figure out what type of interface list mechanism we
# have.
#
# If the capture type is null, that means we can't capture,
# so we can't open any capture devices, so we won't return
# any interfaces.
#
if(NOT PCAP_TYPE STREQUAL "null")
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LINK_LIBRARIES})
check_function_exists(getifaddrs HAVE_GETIFADDRS)
cmake_pop_check_state()
if(NOT HAVE_GETIFADDRS)
#
# It's not in the libraries that, at this point, we've
# found we need to link libpcap with.
#
# It's in libsocket on Solaris and possibly other OSes;
# as long as we're not linking with libxnet, check there.
#
# NOTE: if you hand check_library_exists as its last
# argument a variable that's been set, it skips the test,
# so we need different variables.
#
if(NOT LIBXNET_HAS_GETHOSTBYNAME)
check_library_exists(socket getifaddrs "" SOCKET_HAS_GETIFADDRS)
if(SOCKET_HAS_GETIFADDRS)
set(PCAP_LINK_LIBRARIES socket ${PCAP_LINK_LIBRARIES})
set(LIBS "-lsocket ${LIBS}")
set(LIBS_STATIC "-lsocket ${LIBS_STATIC}")
set(LIBS_PRIVATE "-lsocket ${LIBS_PRIVATE}")
set(HAVE_GETIFADDRS TRUE)
endif()
endif()
endif()
if(HAVE_GETIFADDRS)
#
# We have "getifaddrs()"; make sure we have <ifaddrs.h>
# as well, just in case some platform is really weird.
# It may require that sys/types.h be included first,
# so include it first.
#
check_include_files("sys/types.h;ifaddrs.h" HAVE_IFADDRS_H)
if(HAVE_IFADDRS_H)
#
# We have the header, so we use "getifaddrs()" to
# get the list of interfaces.
#
set(FINDALLDEVS_TYPE getad)
else()
#
# We don't have the header - give up.
# XXX - we could also fall back on some other
# mechanism, but, for now, this'll catch this
# problem so that we can at least try to figure
# out something to do on systems with "getifaddrs()"
# but without "ifaddrs.h", if there is something
# we can do on those systems.
#
message(FATAL_ERROR "Your system has getifaddrs() but doesn't have a usable <ifaddrs.h>.")
endif()
else()
#
# Well, we don't have "getifaddrs()", at least not with the
# libraries with which we've decided we need to link
# libpcap with, so we have to use some other mechanism.
#
# Note that this may happen on Solaris, which has
# getifaddrs(), but in -lsocket, not in -lxnet, so we
# won't find it if we link with -lxnet, which we want
# to do for other reasons.
#
# For now, we use either the SIOCGIFCONF ioctl or the
# SIOCGLIFCONF ioctl, preferring the latter if we have
# it; the latter is a Solarisism that first appeared
# in Solaris 8. (Solaris's getifaddrs() appears to
# be built atop SIOCGLIFCONF; using it directly
# avoids a not-all-that-useful middleman.)
#
try_compile(HAVE_SIOCGLIFCONF ${CMAKE_CURRENT_BINARY_DIR} "${pcap_SOURCE_DIR}/cmake/have_siocglifconf.c" )
if(HAVE_SIOCGLIFCONF)
set(FINDALLDEVS_TYPE glifc)
else()
set(FINDALLDEVS_TYPE gifc)
endif()
endif()
message(STATUS "Find-interfaces mechanism type: ${FINDALLDEVS_TYPE}")
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} fad-${FINDALLDEVS_TYPE}.c)
endif()
endif()

# Check for hardware timestamp support.
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
check_include_file(linux/net_tstamp.h HAVE_LINUX_NET_TSTAMP_H)
endif()

#
# Check for additional native sniffing capabilities.
#

#
# Various Linux-specific mechanisms.
#
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
# Check for usbmon USB sniffing support.
if(NOT DISABLE_LINUX_USBMON)
set(PCAP_SUPPORT_LINUX_USBMON TRUE)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-usb-linux.c)
#
# Do we have a version of <linux/compiler.h> available?
# If so, we might need it for <linux/usbdevice_fs.h>.
#
check_include_files("linux/compiler.h" HAVE_LINUX_COMPILER_H)
if(HAVE_LINUX_COMPILER_H)
#
# Yes - include it when testing for <linux/usbdevice_fs.h>.
#
check_include_files("linux/compiler.h;linux/usbdevice_fs.h" HAVE_LINUX_USBDEVICE_FS_H)
else(HAVE_LINUX_COMPILER_H)
check_include_files("linux/usbdevice_fs.h" HAVE_LINUX_USBDEVICE_FS_H)
endif(HAVE_LINUX_COMPILER_H)
if(HAVE_LINUX_USBDEVICE_FS_H)
#
# OK, does it define bRequestType? Older versions of the kernel
# define fields with names like "requesttype, "request", and
# "value", rather than "bRequestType", "bRequest", and
# "wValue".
#
if(HAVE_LINUX_COMPILER_H)
check_struct_has_member("struct usbdevfs_ctrltransfer" bRequestType "linux/compiler.h;linux/usbdevice_fs.h" HAVE_STRUCT_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE)
else(HAVE_LINUX_COMPILER_H)
check_struct_has_member("struct usbdevfs_ctrltransfer" bRequestType "linux/usbdevice_fs.h" HAVE_STRUCT_USBDEVFS_CTRLTRANSFER_BREQUESTTYPE)
endif(HAVE_LINUX_COMPILER_H)
endif()
endif()

#
# Check for netfilter sniffing support.
#
# Life's too short to deal with trying to get this to compile
# if you don't get the right types defined with
# __KERNEL_STRICT_NAMES getting defined by some other include.
#
# Check whether the includes Just Work. If not, don't turn on
# netfilter support.
#
check_c_source_compiles(
"#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/types.h>

#include <linux/netlink.h>
#include <linux/netfilter.h>
#include <linux/netfilter/nfnetlink.h>
#include <linux/netfilter/nfnetlink_log.h>
#include <linux/netfilter/nfnetlink_queue.h>

int
main(void)
{
return 0;
}
"
PCAP_SUPPORT_NETFILTER)
if(PCAP_SUPPORT_NETFILTER)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-netfilter-linux.c)
endif(PCAP_SUPPORT_NETFILTER)
endif()

# Check for netmap sniffing support.
if(NOT DISABLE_NETMAP)
#
# Check whether net/netmap_user.h is usable if NETMAP_WITH_LIBS is
# defined; it's not usable on DragonFly BSD 4.6 if NETMAP_WITH_LIBS
# is defined, for example, as it includes a nonexistent malloc.h
# header.
#
check_c_source_compiles(
"#define NETMAP_WITH_LIBS
#include <net/netmap_user.h>

int
main(void)
{
return 0;
}
"
PCAP_SUPPORT_NETMAP)
if(PCAP_SUPPORT_NETMAP)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-netmap.c)
endif(PCAP_SUPPORT_NETMAP)
endif()

# Check for DPDK sniffing support
if(NOT DISABLE_DPDK)
find_package(dpdk)
if(dpdk_FOUND)
#
# We call rte_eth_dev_count_avail(), and older versions of DPDK
# didn't have it, so check for it.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_INCLUDES ${dpdk_INCLUDE_DIRS})
set(CMAKE_REQUIRED_LIBRARIES ${dpdk_LIBRARIES})
check_function_exists(rte_eth_dev_count_avail HAVE_RTE_ETH_DEV_COUNT_AVAIL)
cmake_pop_check_state()
if(HAVE_RTE_ETH_DEV_COUNT_AVAIL)
set(DPDK_C_FLAGS "-march=native")
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} ${DPDK_C_FLAGS}")
include_directories(AFTER ${dpdk_INCLUDE_DIRS})
link_directories(AFTER ${dpdk_LIBRARIES})
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${dpdk_LIBRARIES})
set(LIBS "${LIBS} ${dpdk_LIBS}")
set(LIBS_STATIC "${LIBS_STATIC} ${dpdk_LIBS_STATIC}")
set(REQUIRES_PRIVATE "${REQUIRES_PRIVATE} ${dpdk_PACKAGE_NAME}")
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-dpdk.c)
set(PCAP_SUPPORT_DPDK TRUE)

#
# Check whether the rte_ether.h file defines
# struct ether_addr or struct rte_ether_addr.
#
# ("API compatibility? That's for losers!")
#
cmake_push_check_state()
set(CMAKE_REQUIRED_INCLUDES ${dpdk_INCLUDE_DIRS})
set(CMAKE_EXTRA_INCLUDE_FILES rte_ether.h)
check_type_size("struct rte_ether_addr" STRUCT_RTE_ETHER_ADDR)
cmake_pop_check_state()
endif()
else()
message(WARNING,
"We couldn't find DPDK with pkg-config. If you want DPDK support,
make sure that pkg-config is installed, that DPDK 18.02.2 or later is
installed, and that DPDK provides a .pc file.")
endif()
endif()

# Check for Bluetooth sniffing support
if(NOT DISABLE_BLUETOOTH)
if(CMAKE_SYSTEM_NAME STREQUAL "Linux")
check_include_file(bluetooth/bluetooth.h HAVE_BLUETOOTH_BLUETOOTH_H)
if(HAVE_BLUETOOTH_BLUETOOTH_H)
set(PCAP_SUPPORT_BT TRUE)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-bt-linux.c)
#
# OK, does struct sockaddr_hci have an hci_channel
# member?
#
check_struct_has_member("struct sockaddr_hci" hci_channel "bluetooth/bluetooth.h;bluetooth/hci.h" HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL)
if(HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL)
#
# OK, is HCI_CHANNEL_MONITOR defined?
#
check_c_source_compiles(
"#include <bluetooth/bluetooth.h>
#include <bluetooth/hci.h>

int
main(void)
{
int i = HCI_CHANNEL_MONITOR;
return 0;
}
"
PCAP_SUPPORT_BT_MONITOR)
if(PCAP_SUPPORT_BT_MONITOR)
#
# Yes, so we can also support Bluetooth monitor
# sniffing.
#
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-bt-monitor-linux.c)
endif(PCAP_SUPPORT_BT_MONITOR)
endif(HAVE_STRUCT_SOCKADDR_HCI_HCI_CHANNEL)
endif(HAVE_BLUETOOTH_BLUETOOTH_H)
endif()
else()
unset(PCAP_SUPPORT_BT_MONITOR CACHE)
endif()

# Check for D-Bus sniffing support
if(NOT DISABLE_DBUS)
#
# We don't support D-Bus sniffing on macOS; see
#
# https://bugs.freedesktop.org/show_bug.cgi?id=74029
#
if(APPLE)
message(FATAL_ERROR "Due to freedesktop.org bug 74029, D-Bus capture support is not available on macOS")
endif(APPLE)
pkg_check_modules(DBUS dbus-1)
if(DBUS_FOUND)
set(PCAP_SUPPORT_DBUS TRUE)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-dbus.c)
include_directories(${DBUS_INCLUDE_DIRS})

#
# This "helpfully" supplies DBUS_LIBRARIES as a bunch of
# library names - not paths - and DBUS_LIBRARY_DIRS as
# a bunch of directories.
#
# CMake *really* doesn't like the notion of specifying "here are
# the directories in which to look for libraries" except in
# find_library() calls; it *really* prefers using full paths to
# library files, rather than library names.
#
# Find the libraries and add their full paths.
#
set(DBUS_LIBRARY_FULLPATHS)
foreach(_lib IN LISTS DBUS_LIBRARIES)
#
# Try to find this library, so we get its full path.
#
find_library(_libfullpath ${_lib} HINTS ${DBUS_LIBRARY_DIRS})
list(APPEND DBUS_LIBRARY_FULLPATHS ${_libfullpath})
endforeach()
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${DBUS_LIBRARY_FULLPATHS})

#
# Get library information for DPDK.
#
pkg_get_link_info(DBUS dbus-1)
set(LIBS "${LIBS} ${DBUS_LIBS}")
set(LIBS_STATIC "${LIBS_STATIC} ${DBUS_LIBS_STATIC}")
set(REQUIRES_PRIVATE "${REQUIRES_PRIVATE} ${DBUS_PACKAGE_NAME}")
endif(DBUS_FOUND)
endif(NOT DISABLE_DBUS)

# Check for RDMA sniffing support
if(NOT DISABLE_RDMA)
pkg_check_modules(LIBIBVERBS libibverbs)
if(LIBIBVERBS_FOUND)
#
# pkg-config found it; remember its pkg-config name.
#
set(LIBIBVERBS_REQUIRES_PRIVATE ${LIBIBVERBS_PACKAGE_NAME})

#
# Get static linking information for it.
#
pkg_get_link_info(LIBIBVERBS libibverbs)
else()
#
# pkg-config didn't find it; try to look for it ourselves
#
check_library_exists(ibverbs ibv_get_device_list "" LIBIBVERBS_HAS_IBV_GET_DEVICE_LIST)
if(LIBIBVERBS_HAS_IBV_GET_DEVICE_LIST)
set(LIBIBVERBS_FOUND TRUE)
set(LIBIBVERBS_LIBRARIES ibverbs)
# XXX - at least on Ubuntu 20.04, there are many more
# libraries needed; is there any platform where
# libibverbs is available but where pkg-config
# isn't available or libibverbs doesn't use it?
# If not, we should only use pkg-config for it.
set(LIBIBVERBS_STATIC_LIBRARIES ibverbs)
set(LIBIBVERBS_LIBS -libverbs)
set(LIBIBVERBS_LIBS_STATIC -libverbs)
set(LIBIBVERBS_LIBS_PRIVATE -libverbs)
endif()
endif()
if(LIBIBVERBS_FOUND)
#
# For unknown reasons, check_include_file() doesn't just attempt
# to compile a test program that includes the header in
# question, it also attempts to link it.
#
# For unknown reasons, at least some of the static inline
# functions defined in infiniband/verbs.h are not inlined by the
# Sun^WOracle Studio C compiler, so the compiler generates code
# for them as part of the object code resulting from compiling
# the test program. At lest some of those functions call
# routines in -libverbs, so, in order to keep the compile and
# link from failing, even though the header file exists and is
# usable, we need to link with -libverbs.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_LIBRARIES ${LIBIBVERBS_LIBRARIES})
check_include_file(infiniband/verbs.h HAVE_INFINIBAND_VERBS_H)
if(HAVE_INFINIBAND_VERBS_H)
check_symbol_exists(ibv_create_flow infiniband/verbs.h PCAP_SUPPORT_RDMASNIFF)
if(PCAP_SUPPORT_RDMASNIFF)
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-rdmasniff.c)
set(PCAP_LINK_LIBRARIES ${LIBIBVERBS_LIBRARIES} ${PCAP_LINK_LIBRARIES})
set(LIBS "${LIBIBVERBS_LIBS} ${LIBS}")
set(LIBS_STATIC "${LIBIBVERBS_LIBS_STATIC} ${LIBS_STATIC}")
set(LIBS_PRIVATE "${LIBIBVERBS_LIBS_PRIVATE} ${LIBS_PRIVATE}")
set(REQUIRES_PRIVATE "${REQUIRES_PRIVATE} ${LIBIBVERBS_PACKAGE_NAME}")
endif(PCAP_SUPPORT_RDMASNIFF)
endif(HAVE_INFINIBAND_VERBS_H)
cmake_pop_check_state()
endif(LIBIBVERBS_FOUND)
endif(NOT DISABLE_RDMA)

#
# Check for sniffing capabilities using third-party APIs.
#

# Check for Endace DAG card support.
if(NOT DISABLE_DAG)
#
# Try to find the DAG header file and library.
#
find_package(DAG)

#
# Did we succeed?
#
if(DAG_FOUND)
#
# Yes.
# Check for various DAG API functions.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_INCLUDES ${DAG_INCLUDE_DIRS})
set(CMAKE_REQUIRED_LIBRARIES ${DAG_LIBRARIES})
check_function_exists(dag_attach_stream HAVE_DAG_STREAMS_API)
if(NOT HAVE_DAG_STREAMS_API)
message(FATAL_ERROR "DAG library lacks streams support")
endif()
check_function_exists(dag_attach_stream64 HAVE_DAG_LARGE_STREAMS_API)
check_function_exists(dag_get_erf_types HAVE_DAG_GET_ERF_TYPES)
check_function_exists(dag_get_stream_erf_types HAVE_DAG_GET_STREAM_ERF_TYPES)
cmake_pop_check_state()

include_directories(AFTER ${DAG_INCLUDE_DIRS})
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-dag.c)
set(HAVE_DAG_API TRUE)
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${DAG_LIBRARIES})
set(LIBS "${LIBS} ${DAG_LIBS}")
set(LIBS_STATIC "${LIBS_STATIC} ${DAG_LIBS_STATIC}")
set(LIBS_PRIVATE "${LIBS_PRIVATE} ${DAG_LIBS_PRIVATE}")

if(HAVE_DAG_LARGE_STREAMS_API)
get_filename_component(DAG_LIBRARY_DIR ${DAG_LIBRARY} PATH)
check_library_exists(vdag vdag_set_device_info ${DAG_LIBRARY_DIR} HAVE_DAG_VDAG)
if(HAVE_DAG_VDAG)
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${CMAKE_THREAD_LIBS_INIT})
set(LIBS "${LIBS} ${CMAKE_THREAD_LIBS_INIT}")
set(LIBS_STATIC "${LIBS_STATIC} ${CMAKE_THREAD_LIBS_INIT}")
set(LIBS_PRIVATE "${LIBS_PRIVATE} ${CMAKE_THREAD_LIBS_INIT}")
endif()
endif()
endif()
endif()

# Check for Septel card support.
set(PROJECT_EXTERNAL_OBJECT_LIST "")
if(NOT DISABLE_SEPTEL)
#
# Do we have the msg.h header?
#
set(SEPTEL_INCLUDE_DIRS "${SEPTEL_ROOT}/INC")
cmake_push_check_state()
set(CMAKE_REQUIRED_INCLUDES ${SEPTEL_INCLUDE_DIRS})
check_include_file(msg.h HAVE_INC_MSG_H)
cmake_pop_check_state()
if(HAVE_INC_MSG_H)
#
# Yes.
#
include_directories(AFTER ${SEPTEL_INCLUDE_DIRS})
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-septel.c)
set(PROJECT_EXTERNAL_OBJECT_LIST ${PROJECT_EXTERNAL_OBJECT_LIST} "${SEPTEL_ROOT}/asciibin.o ${SEPTEL_ROOT}/bit2byte.o ${SEPTEL_ROOT}/confirm.o ${SEPTEL_ROOT}/fmtmsg.o ${SEPTEL_ROOT}/gct_unix.o ${SEPTEL_ROOT}/hqueue.o ${SEPTEL_ROOT}/ident.o ${SEPTEL_ROOT}/mem.o ${SEPTEL_ROOT}/pack.o ${SEPTEL_ROOT}/parse.o ${SEPTEL_ROOT}/pool.o ${SEPTEL_ROOT}/sdlsig.o ${SEPTEL_ROOT}/strtonum.o ${SEPTEL_ROOT}/timer.o ${SEPTEL_ROOT}/trace.o")
set(HAVE_SEPTEL_API TRUE)
endif()
endif()

# Check for Myricom SNF support.
if(NOT DISABLE_SNF)
#
# Try to find the SNF header file and library.
#
find_package(SNF)

#
# Did we succeed?
#
if(SNF_FOUND)
#
# Yes.
#
include_directories(AFTER ${SNF_INCLUDE_DIRS})
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-snf.c)
set(HAVE_SNF_API TRUE)
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${SNF_LIBRARIES})
set(LIBS "${LIBS_STATIC} ${SNF_LIBS}")
set(LIBS_STATIC "${LIBS_STATIC} ${SNF_LIBS_STATIC}")
set(LIBS_PRIVATE "${LIBS_PRIVATE} ${SNF_LIBS_PRIVATE}")
endif()
endif()

# Check for Riverbed AirPcap support.
if(NOT DISABLE_AIRPCAP)
#
# Try to find the AirPcap header file and library.
#
find_package(AirPcap)

#
# Did we succeed?
#
if(AirPcap_FOUND)
#
# Yes.
#
include_directories(AFTER ${AirPcap_INCLUDE_DIRS})
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-airpcap.c)
set(HAVE_AIRPCAP_API TRUE)
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${AirPcap_LIBRARIES})
endif()
endif()

# Check for Riverbed TurboCap support.
if(NOT DISABLE_TC)
#
# Try to find the TurboCap header file and library.
#
find_package(TC)

#
# Did we succeed?
#
if(TC_FOUND)
#
# Yes.
#
include_directories(AFTER ${TC_INCLUDE_DIRS})
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} pcap-tc.c)
set(HAVE_TC_API TRUE)
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} ${TC_LIBRARIES} ${CMAKE_USE_PTHREADS_INIT} stdc++)
endif()
endif()

#
# Remote capture support.
#

if(ENABLE_REMOTE)
#
# Check for various members of struct msghdr.
# We need to include ftmacros.h on some platforms, to make sure we
# get the POSIX/Single USER Specification version of struct msghdr,
# which has those members, rather than the backwards-compatible
# version, which doesn't. That's not a system header file, and
# at least some versions of CMake include it as <ftmacros.h>, which
# won't check the current directory, so we add the top-level
# source directory to the list of include directories when we do
# the check.
#
cmake_push_check_state()
set(CMAKE_REQUIRED_INCLUDES ${CMAKE_CURRENT_SOURCE_DIR})
check_struct_has_member("struct msghdr" msg_control "ftmacros.h;sys/socket.h" HAVE_STRUCT_MSGHDR_MSG_CONTROL)
check_struct_has_member("struct msghdr" msg_flags "ftmacros.h;sys/socket.h" HAVE_STRUCT_MSGHDR_MSG_FLAGS)
cmake_pop_check_state()
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C}
pcap-new.c pcap-rpcap.c rpcap-protocol.c sockutils.c sslutils.c)
endif(ENABLE_REMOTE)

###################################################################
# Warning options
###################################################################

#
# Check and add warning options if we have a .devel file.
#
if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/.devel OR EXISTS ${CMAKE_BINARY_DIR}/.devel)
#
# Warning options.
#
if(MSVC AND NOT ${CMAKE_C_COMPILER} MATCHES "clang*")
#
# MSVC, with Microsoft's front end and code generator.
# "MSVC" is also set for Microsoft's compiler with a Clang
# front end and their code generator ("Clang/C2"), so we
# check for clang.exe and treat that differently.
#
check_and_add_compiler_option(-Wall)
#
# Disable some pointless warnings that /Wall turns on.
#
# Unfortunately, MSVC does not appear to have an equivalent
# to "__attribute__((unused))" to mark a particular function
# parameter as being known to be unused, so that the compiler
# won't warn about it (for example, the function might have
# that parameter because a pointer to it is being used, and
# the signature of that function includes that parameter).
# C++ lets you give a parameter a type but no name, but C
# doesn't have that.
#
check_and_add_compiler_option(-wd4100)
#
# In theory, we care whether somebody uses f() rather than
# f(void) to declare a function with no arguments, but, in
# practice, there are places in the Windows header files
# that appear to do that, so we squelch that warning.
#
check_and_add_compiler_option(-wd4255)
#
# Windows FD_SET() generates this, so we suppress it.
#
check_and_add_compiler_option(-wd4548)
#
# Perhaps testing something #defined to be 0 with #ifdef is an
# error, and it should be tested with #if, but perhaps it's
# not, and Microsoft does that in its headers, so we squelch
# that warning.
#
check_and_add_compiler_option(-wd4574)
#
# The Windows headers also test not-defined values in #if, so
# we don't want warnings about that, either.
#
check_and_add_compiler_option(-wd4668)
#
# We do *not* care whether some function is, or isn't, going to be
# expanded inline.
#
check_and_add_compiler_option(-wd4710)
check_and_add_compiler_option(-wd4711)
#
# We do *not* care whether we're adding padding bytes after
# structure members.
#
check_and_add_compiler_option(-wd4820)
#
# We do *not* care about every single place the compiler would
# have inserted Spectre mitigation if only we had told it to
# do so with /Qspectre. Maybe it's worth it, as that's in
# Bison-generated code that we don't control.
#
# XXX - add /Qspectre if that is really worth doing.
#
check_and_add_compiler_option(-wd5045)

#
# Treat all (remaining) warnings as errors.
#
check_and_add_compiler_option(-WX)
else()
#
# Other compilers, including MSVC with a Clang front end and
# Microsoft's code generator. We currently treat them as if
# they might support GCC-style -W options.
#
check_and_add_compiler_option(-W)
check_and_add_compiler_option(-Wall)
check_and_add_compiler_option(-Wcomma)
# Warns about safeguards added in case the enums are extended
# check_and_add_compiler_option(-Wcovered-switch-default)
check_and_add_compiler_option(-Wdocumentation)
check_and_add_compiler_option(-Wformat-nonliteral)
check_and_add_compiler_option(-Wmissing-noreturn)
check_and_add_compiler_option(-Wmissing-prototypes)
check_and_add_compiler_option(-Wmissing-variable-declarations)
check_and_add_compiler_option(-Wnull-pointer-subtraction)
check_and_add_compiler_option(-Wpointer-arith)
check_and_add_compiler_option(-Wpointer-sign)
check_and_add_compiler_option(-Wshadow)
check_and_add_compiler_option(-Wshorten-64-to-32)
check_and_add_compiler_option(-Wsign-compare)
check_and_add_compiler_option(-Wstrict-prototypes)
check_and_add_compiler_option(-Wundef)
check_and_add_compiler_option(-Wunreachable-code)
check_and_add_compiler_option(-Wunused-but-set-parameter)
check_and_add_compiler_option(-Wunused-but-set-variable)
check_and_add_compiler_option(-Wunused-parameter)
check_and_add_compiler_option(-Wused-but-marked-unused)
endif()
endif()

#
# Suppress some warnings we get with MSVC even without /Wall.
#
if(MSVC AND NOT ${CMAKE_C_COMPILER} MATCHES "clang*")
#
# Yes, we have some functions that never return but that
# have a non-void return type. That's because, on some
# platforms, they *do* return values but, on other
# platforms, including Windows, they just fail and
# longjmp out by calling bpf_error().
#
check_and_add_compiler_option(-wd4646)
endif()

file(GLOB PROJECT_SOURCE_LIST_H
*.h
pcap/*.h
)

#
# Try to have the compiler default to hiding symbols, so that only
# symbols explicitly exported with PCAP_API will be visible outside
# (shared) libraries.
#
# Not necessary with MSVC, as that's the default.
#
# XXX - we don't use ADD_COMPILER_EXPORT_FLAGS, because, as of CMake
# 2.8.12.2, it doesn't know about Sun C/Oracle Studio, and, as of
# CMake 2.8.6, it only sets the C++ compiler flags, rather than
# allowing an arbitrary variable to be set with the "hide symbols
# not explicitly exported" flag.
#
if(NOT MSVC)
if(CMAKE_C_COMPILER_ID MATCHES "SunPro")
#
# Sun C/Oracle Studio.
#
check_and_add_compiler_option(-xldscope=hidden)
else()
#
# Try this for all other compilers; it's what GCC uses,
# and a number of other compilers, such as Clang and Intel C,
# use it as well.
#
check_and_add_compiler_option(-fvisibility=hidden)
endif()
endif(NOT MSVC)

#
# Extra compiler options for the build matrix scripts to request -Werror or
# its equivalent if required. The CMake variable name cannot be CFLAGS
# because that is already used for a different purpose in CMake. Example
# usage: cmake -DEXTRA_CFLAGS='-Wall -Wextra -Werror' ...
#
if(NOT "${EXTRA_CFLAGS}" STREQUAL "")
# The meaning of EXTRA_CFLAGS is "use the exact specified options, or the
# build risks failing to fail", not "try every specified option, omit those
# that do not work and use the rest". Thus use add_compile_options(), not
# foreach()/check_and_add_compiler_option(). Another reason to do that is
# that the effect lasts in testprogs/ and testprogs/fuzz/.
string(REPLACE " " ";" _extra_cflags_list ${EXTRA_CFLAGS})
add_compile_options(${_extra_cflags_list})
message(STATUS "Added extra compile options (${EXTRA_CFLAGS})")
endif()

#
# Flex/Lex and YACC/Berkeley YACC/Bison.
# From a mail message to the CMake mailing list by Andy Cedilnik of
# Kitware.
#

#
# Try to find Flex, a Windows version of Flex, or Lex.
#
find_program(LEX_EXECUTABLE NAMES flex win_flex lex)
if(LEX_EXECUTABLE STREQUAL "LEX_EXECUTABLE-NOTFOUND")
message(FATAL_ERROR "Neither flex nor win_flex nor lex was found.")
endif()
message(STATUS "Lexical analyzer generator: ${LEX_EXECUTABLE}")

#
# Make sure {f}lex supports the -P, --header-file, and --nounput flags
# and supports processing our scanner.l.
#
if(WIN32)
set(NULL_DEVICE "NUL:")
else()
set(NULL_DEVICE "/dev/null")
endif()
execute_process(COMMAND ${LEX_EXECUTABLE} -P pcap_ --header-file=${NULL_DEVICE} --nounput -t ${pcap_SOURCE_DIR}/scanner.l
OUTPUT_QUIET RESULT_VARIABLE EXIT_STATUS)
if(NOT EXIT_STATUS EQUAL 0)
message(FATAL_ERROR "${LEX_EXECUTABLE} is insufficient to compile libpcap.
libpcap requires Flex 2.5.31 or later, or a compatible version of lex.
If a suitable version of Lex/Flex is available as a non-standard command
and/or not in the PATH, you can specify it using the LEX environment
variable. That said, on some systems the error can mean that Flex/Lex is
actually acceptable, but m4 is not. Likewise, if a suitable version of
m4 (such as GNU M4) is available but has not been detected, you can
specify it using the M4 environment variable.")
endif()

add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/scanner.c ${CMAKE_CURRENT_BINARY_DIR}/scanner.h
SOURCE ${pcap_SOURCE_DIR}/scanner.l
COMMAND ${LEX_EXECUTABLE} -P pcap_ --header-file=scanner.h --nounput -o${CMAKE_CURRENT_BINARY_DIR}/scanner.c ${pcap_SOURCE_DIR}/scanner.l
DEPENDS ${pcap_SOURCE_DIR}/scanner.l
)

#
# Since scanner.c does not exist yet when cmake is run, mark
# it as generated.
#
# Since scanner.c includes grammar.h, mark that as a dependency.
#
set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/scanner.c PROPERTIES
GENERATED TRUE
OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/grammar.h
)

#
# Add scanner.c to the list of sources.
#
#set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${CMAKE_CURRENT_BINARY_DIR}/scanner.c)

#
# Try to find YACC or Bison.
#
find_program(YACC_EXECUTABLE NAMES bison win_bison byacc yacc)
if(YACC_EXECUTABLE STREQUAL "YACC_EXECUTABLE-NOTFOUND")
message(FATAL_ERROR "Neither bison nor win_bison nor byacc nor yacc was found.")
endif()

if(YACC_EXECUTABLE MATCHES "byacc" OR YACC_EXECUTABLE MATCHES "yacc")
#
# Make sure this is Berkeley YACC, not AT&T YACC;
# the latter doesn't support reentrant parsers.
# Run it with "-V"; that succeeds and reports the
# version number with Berkeley YACC, but will
# (probably) fail with various vendor flavors
# of AT&T YACC.
#
# Hopefully this also eliminates any versions
# of Berkeley YACC that don't support reentrant
# parsers, if there are any.
#
execute_process(COMMAND ${YACC_EXECUTABLE} -V OUTPUT_QUIET
RESULT_VARIABLE EXIT_STATUS)
if(NOT EXIT_STATUS EQUAL 0)
message(FATAL_ERROR "${YACC_EXECUTABLE} is insufficient to compile libpcap.
libpcap requires Bison, a newer version of Berkeley YACC with support
for reentrant parsers, or another YACC compatible with them.")
endif()
#
# Berkeley YACC doesn't support "%define api.pure", so use
# "%pure-parser".
#
set(REENTRANT_PARSER "%pure-parser")
else()
#
# Bison prior to 2.4(.1) doesn't support "%define api.pure", so use
# "%pure-parser".
#
execute_process(COMMAND ${YACC_EXECUTABLE} -V OUTPUT_VARIABLE bison_full_version)
string(REGEX MATCH "[1-9][0-9]*[.][0-9]+" bison_major_minor ${bison_full_version})
if (bison_major_minor VERSION_LESS "2.4")
set(REENTRANT_PARSER "%pure-parser")
else()
set(REENTRANT_PARSER "%define api.pure")
endif()
endif()

message(STATUS "Parser generator: ${YACC_EXECUTABLE}")

#
# Create custom command for the scanner.
#
add_custom_command(
OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/grammar.c ${CMAKE_CURRENT_BINARY_DIR}/grammar.h
SOURCE ${pcap_BINARY_DIR}/grammar.y
COMMAND ${YACC_EXECUTABLE} -p pcap_ -o ${CMAKE_CURRENT_BINARY_DIR}/grammar.c -d ${pcap_BINARY_DIR}/grammar.y
DEPENDS ${pcap_BINARY_DIR}/grammar.y
)

#
# Since grammar.c does not exists yet when cmake is run, mark
# it as generated.
#
set_source_files_properties(${CMAKE_CURRENT_BINARY_DIR}/grammar.c PROPERTIES
GENERATED TRUE
OBJECT_DEPENDS ${CMAKE_CURRENT_BINARY_DIR}/scanner.h
)

#
# Add grammar.c to the list of sources.
#
#set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${CMAKE_CURRENT_BINARY_DIR}/grammar.c)

#
# Assume, by default, no support for shared libraries and V7/BSD
# convention for man pages (devices in section 4, file formats in
# section 5, miscellaneous info in section 7, administrative commands
# and daemons in section 8). Individual cases can override this.
# Individual cases can override this.
#
set(MAN_DEVICES 4)
set(MAN_FILE_FORMATS 5)
set(MAN_MISC_INFO 7)
set(MAN_ADMIN_COMMANDS 8)
if(CMAKE_SYSTEM_NAME STREQUAL "AIX")
# Workaround to enable certain features
set(_SUN TRUE)
if(PCAP_TYPE STREQUAL "bpf")
#
# If we're using BPF, we need libodm and libcfg, as
# we use them to load the BPF module.
#
set(PCAP_LINK_LIBRARIES ${PCAP_LINK_LIBRARIES} odm cfg)
set(LIBS "${LIBS} -lodm -lcfg")
set(LIBS_STATIC "${LIBS_STATIC} -lodm -lcfg")
set(LIBS_PRIVATE "${LIBS_PRIVATE} -lodm -lcfg")
endif()
elseif(CMAKE_SYSTEM_NAME STREQUAL "HP-UX")
if(CMAKE_SYSTEM_VERSION MATCHES "[A-Z.]*9\.[0-9]*")
#
# HP-UX 9.x.
#
set(HAVE_HPUX9 TRUE)
elseif(CMAKE_SYSTEM_VERSION MATCHES "[A-Z.]*10\.0")
#
# HP-UX 10.0.
#
elseif(CMAKE_SYSTEM_VERSION MATCHES "[A-Z.]*10\.1")
#
# HP-UX 10.1.
#
else()
#
# HP-UX 10.20 and later.
#
set(HAVE_HPUX10_20_OR_LATER TRUE)
endif()

#
# Use System V conventions for man pages.
#
set(MAN_ADMIN_COMMANDS 1m)
set(MAN_FILE_FORMATS 4)
set(MAN_MISC_INFO 5)
elseif(CMAKE_SYSTEM_NAME STREQUAL "IRIX" OR CMAKE_SYSTEM_NAME STREQUAL "IRIX64")
#
# Use IRIX conventions for man pages; they're the same as the
# System V conventions, except that they use section 8 for
# administrative commands and daemons.
#
set(MAN_FILE_FORMATS 4)
set(MAN_MISC_INFO 5)
elseif(CMAKE_SYSTEM_NAME STREQUAL "OSF1")
#
# DEC OSF/1, a/k/a Digital UNIX, a/k/a Tru64 UNIX.
# Use Tru64 UNIX conventions for man pages; they're the same as the
# System V conventions except that they use section 8 for
# administrative commands and daemons.
#
set(MAN_FILE_FORMATS 4)
set(MAN_MISC_INFO 5)
set(MAN_DEVICES 7)
elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
#
# SunOS 5.x.
#
set(HAVE_SOLARIS TRUE)
#
# Make sure errno is thread-safe, in case we're called in
# a multithreaded program. We don't guarantee that two
# threads can use the *same* pcap_t safely, but the
# current version does guarantee that you can use different
# pcap_t's in different threads, and even that pcap_compile()
# is thread-safe (it wasn't thread-safe in some older versions).
#
add_definitions(-D_TS_ERRNO)

if(CMAKE_SYSTEM_VERSION STREQUAL "5.12")
else()
#
# Use System V conventions for man pages.
#
set(MAN_ADMIN_COMMANDS 1m)
set(MAN_FILE_FORMATS 4)
set(MAN_MISC_INFO 5)
set(MAN_DEVICES 7D)
endif()
elseif(CMAKE_SYSTEM_NAME STREQUAL "Haiku")
#
# Haiku needs _BSD_SOURCE for the _IO* macros because it doesn't use them.
#
add_definitions(-D_BSD_SOURCE)
endif()

source_group("Source Files" FILES ${PROJECT_SOURCE_LIST_C})
source_group("Header Files" FILES ${PROJECT_SOURCE_LIST_H})

if(WIN32)
#
# Add pcap-dll.rc to the list of sources.
#
set(PROJECT_SOURCE_LIST_C ${PROJECT_SOURCE_LIST_C} ${pcap_SOURCE_DIR}/pcap-dll.rc)
endif(WIN32)

#
# Add subdirectories after we've set various variables, so they pick up
# pick up those variables.
#
if(ENABLE_REMOTE)
add_subdirectory(rpcapd)
endif(ENABLE_REMOTE)
add_subdirectory(testprogs)

######################################
# Register targets
######################################

#
# Special target to serialize the building of the generated source.
#
# See
#
# https://public.kitware.com/pipermail/cmake/2013-August/055510.html
#
add_custom_target(SerializeTarget
DEPENDS
${CMAKE_CURRENT_BINARY_DIR}/grammar.c
${CMAKE_CURRENT_BINARY_DIR}/scanner.c
)

set_source_files_properties(${PROJECT_EXTERNAL_OBJECT_LIST} PROPERTIES
EXTERNAL_OBJECT TRUE)

if(BUILD_SHARED_LIBS)
add_library(${LIBRARY_NAME} SHARED
${PROJECT_SOURCE_LIST_C}
${CMAKE_CURRENT_BINARY_DIR}/grammar.c
${CMAKE_CURRENT_BINARY_DIR}/scanner.c
${PROJECT_EXTERNAL_OBJECT_LIST}
)
target_include_directories(${LIBRARY_NAME} PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
$<INSTALL_INTERFACE:include>
)
add_dependencies(${LIBRARY_NAME} SerializeTarget)
set_target_properties(${LIBRARY_NAME} PROPERTIES
COMPILE_DEFINITIONS BUILDING_PCAP)
#
# No matter what the library is called - it might be called "wpcap"
# in a Windows build - the symbol to define to indicate that we're
# building the library, rather than a program using the library,
# and thus that we're exporting functions defined in our public
# header files, rather than importing those functions, is
# pcap_EXPORTS.
#
set_target_properties(${LIBRARY_NAME} PROPERTIES
DEFINE_SYMBOL pcap_EXPORTS)
if(NOT "${LINKER_FLAGS}" STREQUAL "")
set_target_properties(${LIBRARY_NAME} PROPERTIES
LINK_FLAGS "${LINKER_FLAGS}")
endif()
endif(BUILD_SHARED_LIBS)

add_library(${LIBRARY_NAME}_static STATIC
${PROJECT_SOURCE_LIST_C}
${CMAKE_CURRENT_BINARY_DIR}/grammar.c
${CMAKE_CURRENT_BINARY_DIR}/scanner.c
${PROJECT_EXTERNAL_OBJECT_LIST}
)
target_include_directories(${LIBRARY_NAME}_static PUBLIC
$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
$<INSTALL_INTERFACE:include>
)
add_dependencies(${LIBRARY_NAME}_static SerializeTarget)
set_target_properties(${LIBRARY_NAME}_static PROPERTIES
COMPILE_DEFINITIONS BUILDING_PCAP)

if(WIN32)
if(BUILD_SHARED_LIBS)
set_target_properties(${LIBRARY_NAME} PROPERTIES
VERSION ${PACKAGE_VERSION_NOSUFFIX} # only MAJOR and MINOR are needed
)
endif(BUILD_SHARED_LIBS)
if(MSVC)
# XXX For DLLs, the TARGET_PDB_FILE generator expression can be used to locate
# its PDB file's output directory for installation.
# cmake doesn't offer a generator expression for PDB files generated by the
# compiler (static libraries).
# So instead of considering any possible output there is (there are many),
# this will search for the PDB file in the compiler's initial output directory,
# which is always ${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles\wpcap_static.dir
# regardless of architecture, build generator etc.
# Quite hackish indeed.
set(CMAKE_COMPILE_PDB_OUTPUT_DIRECTORY $<TARGET_FILE_DIR:${LIBRARY_NAME}_static>)
set_target_properties(${LIBRARY_NAME}_static PROPERTIES
COMPILE_PDB_NAME ${LIBRARY_NAME}_static
OUTPUT_NAME "${LIBRARY_NAME}_static"
)
elseif(MINGW)
#
# For compatibility, build the shared library without the "lib" prefix on
# MinGW as well.
#
set_target_properties(${LIBRARY_NAME} PROPERTIES
PREFIX ""
OUTPUT_NAME "${LIBRARY_NAME}"
)
set_target_properties(${LIBRARY_NAME}_static PROPERTIES
OUTPUT_NAME "${LIBRARY_NAME}"
)
endif()
else(WIN32) # UN*X
if(BUILD_SHARED_LIBS)
if(APPLE)
set_target_properties(${LIBRARY_NAME} PROPERTIES
VERSION ${PACKAGE_VERSION}
SOVERSION A
)
else(APPLE)
set_target_properties(${LIBRARY_NAME} PROPERTIES
VERSION ${PACKAGE_VERSION}
SOVERSION ${PACKAGE_VERSION_MAJOR}
)
endif(APPLE)
endif(BUILD_SHARED_LIBS)
set_target_properties(${LIBRARY_NAME}_static PROPERTIES
OUTPUT_NAME "${LIBRARY_NAME}"
)
endif(WIN32)

if(BUILD_SHARED_LIBS)
if(NOT C_ADDITIONAL_FLAGS STREQUAL "")
set_target_properties(${LIBRARY_NAME} PROPERTIES COMPILE_FLAGS ${C_ADDITIONAL_FLAGS})
endif()

#
# If this is macOS and we've picked the default architectures on
# which to build, build the library on them.
#
if(APPLE AND "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
set_target_properties(${LIBRARY_NAME} PROPERTIES
OSX_ARCHITECTURES "${OSX_LIBRARY_ARCHITECTURES}")
endif()
target_link_libraries(${LIBRARY_NAME} ${PCAP_LINK_LIBRARIES})
endif(BUILD_SHARED_LIBS)

if(NOT C_ADDITIONAL_FLAGS STREQUAL "")
set_target_properties(${LIBRARY_NAME}_static PROPERTIES COMPILE_FLAGS ${C_ADDITIONAL_FLAGS})
endif()

#
# If this is macOS and we've picked the default architectures on
# which to build, build the library on them.
#
if(APPLE AND "${CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
set_target_properties(${LIBRARY_NAME}_static PROPERTIES
OSX_ARCHITECTURES "${OSX_LIBRARY_ARCHITECTURES}")
endif()

######################################
# Write out the config.h file
######################################

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/cmakeconfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/config.h)

######################################
# Write out the grammar.y file
######################################

configure_file(${CMAKE_CURRENT_SOURCE_DIR}/grammar.y.in ${CMAKE_CURRENT_BINARY_DIR}/grammar.y @ONLY)

######################################
# Install pcap library, include files, and man pages
######################################

#
# "Define GNU standard installation directories", which actually
# are also defined, to some degree, by autotools, and at least
# some of which are general UN*X conventions.
#
include(GNUInstallDirs)

set(LIBRARY_NAME_STATIC ${LIBRARY_NAME}_static)

function(install_manpage_symlink SOURCE TARGET MANDIR)
if(MINGW)
#
# If we haven't found an ln executable with MinGW, we don't try
# generating and installing the man pages, so if we get here,
# we've found that executable.
set(LINK_COMMAND "\"${LINK_EXECUTABLE}\" \"-s\" \"${SOURCE}\" \"${TARGET}\"")
else(MINGW)
set(LINK_COMMAND "\"${CMAKE_COMMAND}\" \"-E\" \"create_symlink\" \"${SOURCE}\" \"${TARGET}\"")
endif(MINGW)

install(CODE "
if(NOT ${CMAKE_INSTALL_MESSAGE} STREQUAL \"NEVER\")
message(STATUS \"Symlinking: \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${MANDIR}/${SOURCE} to ${TARGET}\")
endif()
execute_process(
COMMAND \"${CMAKE_COMMAND}\" \"-E\" \"remove\" \"${TARGET}\"
WORKING_DIRECTORY \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${MANDIR}
)
execute_process(
COMMAND ${LINK_COMMAND}
WORKING_DIRECTORY \$ENV{DESTDIR}\${CMAKE_INSTALL_PREFIX}/${MANDIR}
RESULT_VARIABLE EXIT_STATUS
)
if(NOT EXIT_STATUS EQUAL 0)
message(FATAL_ERROR \"Could not create symbolic link from \${CMAKE_INSTALL_PREFIX}/${MANDIR}/${SOURCE} to ${TARGET}\")
endif()
set(CMAKE_INSTALL_MANIFEST_FILES \${CMAKE_INSTALL_MANIFEST_FILES} \${CMAKE_INSTALL_PREFIX}/${MANDIR}/${TARGET})")
endfunction(install_manpage_symlink)

set(MAN1_NOEXPAND pcap-config.1)
set(MAN3PCAP_EXPAND
pcap.3pcap.in
pcap_compile.3pcap.in
pcap_datalink.3pcap.in
pcap_dump_open.3pcap.in
pcap_get_tstamp_precision.3pcap.in
pcap_list_datalinks.3pcap.in
pcap_list_tstamp_types.3pcap.in
pcap_open_dead.3pcap.in
pcap_open_offline.3pcap.in
pcap_set_immediate_mode.3pcap.in
pcap_set_tstamp_precision.3pcap.in
pcap_set_tstamp_type.3pcap.in
)
set(MAN3PCAP_NOEXPAND
pcap_activate.3pcap
pcap_breakloop.3pcap
pcap_can_set_rfmon.3pcap
pcap_close.3pcap
pcap_create.3pcap
pcap_datalink_name_to_val.3pcap
pcap_datalink_val_to_name.3pcap
pcap_dump.3pcap
pcap_dump_close.3pcap
pcap_dump_file.3pcap
pcap_dump_flush.3pcap
pcap_dump_ftell.3pcap
pcap_file.3pcap
pcap_fileno.3pcap
pcap_findalldevs.3pcap
pcap_freecode.3pcap
pcap_get_required_select_timeout.3pcap
pcap_get_selectable_fd.3pcap
pcap_geterr.3pcap
pcap_init.3pcap
pcap_inject.3pcap
pcap_is_swapped.3pcap
pcap_lib_version.3pcap
pcap_lookupdev.3pcap
pcap_lookupnet.3pcap
pcap_loop.3pcap
pcap_major_version.3pcap
pcap_next_ex.3pcap
pcap_offline_filter.3pcap
pcap_open_live.3pcap
pcap_set_buffer_size.3pcap
pcap_set_datalink.3pcap
pcap_set_promisc.3pcap
pcap_set_protocol_linux.3pcap
pcap_set_rfmon.3pcap
pcap_set_snaplen.3pcap
pcap_set_timeout.3pcap
pcap_setdirection.3pcap
pcap_setfilter.3pcap
pcap_setnonblock.3pcap
pcap_snapshot.3pcap
pcap_stats.3pcap
pcap_statustostr.3pcap
pcap_strerror.3pcap
pcap_tstamp_type_name_to_val.3pcap
pcap_tstamp_type_val_to_name.3pcap
)
set(MANFILE_EXPAND
pcap-savefile.manfile.in
)
set(MANMISC_EXPAND
pcap-filter.manmisc.in
pcap-linktype.manmisc.in
pcap-tstamp.manmisc.in
)

if(BUILD_SHARED_LIBS)
set(LIBRARIES_TO_INSTALL "${LIBRARY_NAME}" "${LIBRARY_NAME_STATIC}")
else(BUILD_SHARED_LIBS)
set(LIBRARIES_TO_INSTALL "${LIBRARY_NAME_STATIC}")
endif(BUILD_SHARED_LIBS)

if(WIN32 OR CYGWIN OR MSYS)
#
# XXX - according to the CMake documentation, WIN32 is set if
# the target is Windows; would there ever be a case where
# CYGWIN or MSYS are set but WIN32 *isn't* set?
#
if(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
#
# Install 64-bit code built with MSVC in the x64 subdirectories,
# as that's where it expects it to be.
#
install(TARGETS ${LIBRARIES_TO_INSTALL}
RUNTIME DESTINATION bin/x64
LIBRARY DESTINATION lib/x64
ARCHIVE DESTINATION lib/x64)
if(NOT MINGW)
install(FILES $<TARGET_FILE_DIR:${LIBRARY_NAME_STATIC}>/${LIBRARY_NAME_STATIC}.pdb
DESTINATION bin/x64 OPTIONAL)
if(BUILD_SHARED_LIBS)
install(FILES $<TARGET_PDB_FILE:${LIBRARY_NAME}>
DESTINATION bin/x64 OPTIONAL)
endif(BUILD_SHARED_LIBS)
endif(NOT MINGW)
else(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
#
# Install 32-bit code, and 64-bit code not built with MSVC
# in the top-level directories, as those are where they
# expect it to be.
#
install(TARGETS ${LIBRARIES_TO_INSTALL}
RUNTIME DESTINATION bin
LIBRARY DESTINATION lib
ARCHIVE DESTINATION lib)
if(MSVC)
install(FILES $<TARGET_FILE_DIR:${LIBRARY_NAME_STATIC}>/${LIBRARY_NAME_STATIC}.pdb
DESTINATION bin OPTIONAL)
if(BUILD_SHARED_LIBS)
install(FILES $<TARGET_PDB_FILE:${LIBRARY_NAME}>
DESTINATION bin OPTIONAL)
endif(BUILD_SHARED_LIBS)
endif(MSVC)
endif(MSVC AND CMAKE_SIZEOF_VOID_P EQUAL 8)
else(WIN32 OR CYGWIN OR MSYS)
install(TARGETS ${LIBRARIES_TO_INSTALL} DESTINATION ${CMAKE_INSTALL_LIBDIR})
endif(WIN32 OR CYGWIN OR MSYS)

install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/pcap/ DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/pcap)
install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/pcap.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/pcap-bpf.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})
install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/pcap-namedb.h DESTINATION ${CMAKE_INSTALL_INCLUDEDIR})

# On UN*X, and on Windows when not using MSVC, generate libpcap.pc and
# pcap-config and process man pages and arrange that they be installed.
if(NOT MSVC)
set(prefix ${CMAKE_INSTALL_PREFIX})
set(exec_prefix "\${prefix}")
set(includedir "\${prefix}/include")
set(libdir "\${exec_prefix}/${CMAKE_INSTALL_LIBDIR}")

#
# If this is a platform where we need to have the .pc file and
# pcap-config script supply an rpath option to specify the directory
# in which the libpcap shared library is installed, and the install
# prefix /usr (meaning we're not installing a system library),
# provide the rpath option.
#
# (We must check CMAKE_INSTALL_PREFIX, as the library directory
# isn't necessarily /usr/lib in this case - for example, Linux
# distributions for 64-bit platforms that also provide support for
# binaries for a 32-bit version of the platform may put the 64-bit
# libraries, the 32-bit libraries, or both in directories other than
# /usr/lib.)
#
# In AIX, do we have to do this?
#
# In Darwin-based OSes, the full paths of the shared libraries with
# which the program was linked are stored in the executable, so we
# don't need to provide an rpath option.
#
# With the HP-UX linker, directories specified with -L are, by
# default, added to the run-time search path, so we don't need to
# supply them.
#
# For Tru64 UNIX, "-rpath" works with DEC's^WCompaq's^WHP's C
# compiler for Alpha, but isn't documented as working with GCC, and
# no GCC-compatible option is documented as working with the DEC
# compiler. If anybody needs this on Tru64/Alpha, they're welcome
# to figure out a way to make it work.
#
# This must *not* depend on the compiler, as, on platforms where
# there's a GCC-compatible compiler and a vendor compiler, we need
# to work with both.
#
if(NOT CMAKE_INSTALL_PREFIX STREQUAL "/usr")
if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD" OR
CMAKE_SYSTEM_NAME STREQUAL "NetBSD" OR
CMAKE_SYSTEM_NAME STREQUAL "OpenBSD" OR
CMAKE_SYSTEM_NAME STREQUAL "DragonFly BSD" OR
CMAKE_SYSTEM_NAME STREQUAL "Linux")
#
# Platforms where the "native" C compiler is GCC or accepts
# compatible command-line arguments, and the "native" linker
# is the GNU linker or accepts compatible command-line
# arguments.
#
set(RPATH "-Wl,-rpath,\${libdir}")
elseif(CMAKE_SYSTEM_NAME STREQUAL "SunOS" AND CMAKE_SYSTEM_VERSION MATCHES "5[.][0-9.]*")
#
# SunOS 5.x.
#
# Sun/Oracle's linker, the GNU linker, and GNU-compatible
# linkers all support -R.
#
set(RPATH "-Wl,-R,\${libdir}")
else()
#
# No option needed to set the RPATH.
#
set(RPATH "")
endif()
endif()
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/pcap-config.in ${CMAKE_CURRENT_BINARY_DIR}/pcap-config @ONLY)
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libpcap.pc.in ${CMAKE_CURRENT_BINARY_DIR}/libpcap.pc @ONLY)
install(PROGRAMS ${CMAKE_CURRENT_BINARY_DIR}/pcap-config DESTINATION bin)
install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libpcap.pc DESTINATION lib/pkgconfig)

#
# Man pages.
#
# For each section of the manual for which we have man pages
# that require macro expansion, do the expansion.
#
# If this is MinGW, maybe we have a UN*X-style ln command and
# maybe we don't. (No, we do *NOT* require MSYS!) If we don't
# have it, don't do the man pages.
#
if(MINGW)
find_program(LINK_EXECUTABLE ln)
endif(MINGW)
if(UNIX OR (MINGW AND LINK_EXECUTABLE))
set(MAN1 "")
foreach(MANPAGE ${MAN1_NOEXPAND})
set(MAN1 ${MAN1} ${CMAKE_CURRENT_SOURCE_DIR}/${MANPAGE})
endforeach(MANPAGE)
install(FILES ${MAN1} DESTINATION ${CMAKE_INSTALL_MANDIR}/man1)

set(MAN3PCAP "")
foreach(MANPAGE ${MAN3PCAP_NOEXPAND})
set(MAN3PCAP ${MAN3PCAP} ${CMAKE_CURRENT_SOURCE_DIR}/${MANPAGE})
endforeach(MANPAGE)
foreach(TEMPLATE_MANPAGE ${MAN3PCAP_EXPAND})
string(REPLACE ".in" "" MANPAGE ${TEMPLATE_MANPAGE})
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE_MANPAGE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE} @ONLY)
set(MAN3PCAP ${MAN3PCAP} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE})
endforeach(TEMPLATE_MANPAGE)
install(FILES ${MAN3PCAP} DESTINATION ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_datalink_val_to_name.3pcap pcap_datalink_val_to_description.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_datalink_val_to_name.3pcap pcap_datalink_val_to_description_or_dlt.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_dump_open.3pcap pcap_dump_fopen.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_findalldevs.3pcap pcap_freealldevs.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_geterr.3pcap pcap_perror.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_inject.3pcap pcap_sendpacket.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_list_datalinks.3pcap pcap_free_datalinks.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_list_tstamp_types.3pcap pcap_free_tstamp_types.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_loop.3pcap pcap_dispatch.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_major_version.3pcap pcap_minor_version.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_next_ex.3pcap pcap_next.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_open_dead.3pcap pcap_open_dead_with_tstamp_precision.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_open_offline.3pcap pcap_open_offline_with_tstamp_precision.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_open_offline.3pcap pcap_fopen_offline.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_open_offline.3pcap pcap_fopen_offline_with_tstamp_precision.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_tstamp_type_val_to_name.3pcap pcap_tstamp_type_val_to_description.3pcap ${CMAKE_INSTALL_MANDIR}/man3)
install_manpage_symlink(pcap_setnonblock.3pcap pcap_getnonblock.3pcap ${CMAKE_INSTALL_MANDIR}/man3)

set(MANFILE "")
foreach(TEMPLATE_MANPAGE ${MANFILE_EXPAND})
string(REPLACE ".manfile.in" ".${MAN_FILE_FORMATS}" MANPAGE ${TEMPLATE_MANPAGE})
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE_MANPAGE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE} @ONLY)
set(MANFILE ${MANFILE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE})
endforeach(TEMPLATE_MANPAGE)
install(FILES ${MANFILE} DESTINATION ${CMAKE_INSTALL_MANDIR}/man${MAN_FILE_FORMATS})

set(MANMISC "")
foreach(TEMPLATE_MANPAGE ${MANMISC_EXPAND})
string(REPLACE ".manmisc.in" ".${MAN_MISC_INFO}" MANPAGE ${TEMPLATE_MANPAGE})
configure_file(${CMAKE_CURRENT_SOURCE_DIR}/${TEMPLATE_MANPAGE} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE} @ONLY)
set(MANMISC ${MANMISC} ${CMAKE_CURRENT_BINARY_DIR}/${MANPAGE})
endforeach(TEMPLATE_MANPAGE)
install(FILES ${MANMISC} DESTINATION ${CMAKE_INSTALL_MANDIR}/man${MAN_MISC_INFO})
endif(UNIX OR (MINGW AND LINK_EXECUTABLE))
endif(NOT MSVC)

# uninstall target
configure_file(
"${CMAKE_CURRENT_SOURCE_DIR}/cmake_uninstall.cmake.in"
"${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake"
IMMEDIATE @ONLY)

add_custom_target(uninstall
COMMAND ${CMAKE_COMMAND} -P ${CMAKE_CURRENT_BINARY_DIR}/cmake_uninstall.cmake)