forked from osmocom/wireshark
277 lines
9.1 KiB
CMake
277 lines
9.1 KiB
CMake
#
|
|
# - Find libpcap
|
|
# Find the native PCAP includes and library
|
|
#
|
|
# PCAP_INCLUDE_DIRS - where to find pcap.h, etc.
|
|
# PCAP_LIBRARIES - List of libraries when using pcap.
|
|
# PCAP_FOUND - True if pcap found.
|
|
|
|
include(FindWSWinLibs)
|
|
FindWSWinLibs("libpcap-*" "PCAP_HINTS")
|
|
|
|
#
|
|
# First, try pkg-config on platforms other than Windows.
|
|
#
|
|
if(NOT WIN32)
|
|
find_package(PkgConfig)
|
|
pkg_search_module(PC_PCAP libpcap)
|
|
endif()
|
|
|
|
if(NOT PC_PCAP_FOUND AND NOT WIN32)
|
|
#
|
|
# That didn't work. Try to retrieve hints from pcap-config.
|
|
# Do not use it on Windows as pcap-config is a shell script.
|
|
#
|
|
find_program(PCAP_CONFIG pcap-config)
|
|
if(PCAP_CONFIG)
|
|
#
|
|
# We have pcap-config; use it.
|
|
#
|
|
# First, get the include directory.
|
|
#
|
|
execute_process(COMMAND "${PCAP_CONFIG}" "--cflags"
|
|
RESULT_VARIABLE PCAP_CONFIG_RESULT
|
|
OUTPUT_VARIABLE PCAP_CONFIG_OUTPUT
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
)
|
|
if(NOT PCAP_CONFIG_RESULT EQUAL 0)
|
|
message(FATAL_ERROR "pcap-config --cflags failed")
|
|
endif()
|
|
#
|
|
# Assumes there's exactly one -I flag in the output
|
|
# of pcap-config --cflags. That *should* be the case.
|
|
# Note that the hint might be bogus, on macOS it could be
|
|
# -I/usr/local/include even though the header isn't
|
|
# there (it may be under /usr/include or it may be
|
|
# buried in the Xcode app bundle).
|
|
#
|
|
string(REGEX REPLACE "^-I" "" PCAP_CONFIG_INCLUDE_DIRS "${PCAP_CONFIG_OUTPUT}")
|
|
|
|
# Now, get the library search path.
|
|
execute_process(COMMAND "${PCAP_CONFIG}" "--libs"
|
|
RESULT_VARIABLE PCAP_CONFIG_RESULT
|
|
OUTPUT_VARIABLE PCAP_CONFIG_OUTPUT
|
|
OUTPUT_STRIP_TRAILING_WHITESPACE
|
|
)
|
|
if(NOT PCAP_CONFIG_RESULT EQUAL 0)
|
|
message(FATAL_ERROR "pcap-config --libs failed")
|
|
endif()
|
|
separate_arguments(LIBS_LIST UNIX_COMMAND ${PCAP_CONFIG_OUTPUT})
|
|
set(PCAP_CONFIG_LIBRARY_DIRS "")
|
|
foreach(_arg IN LISTS LIBS_LIST)
|
|
# At most one -L path is expected for -lpcap.
|
|
if(_arg MATCHES "^-L")
|
|
string(REGEX REPLACE "^-L" "" _dir ${_arg})
|
|
list(APPEND PCAP_CONFIG_LIBRARY_DIRS ${_dir})
|
|
endif()
|
|
endforeach()
|
|
|
|
if(UNIX AND CMAKE_FIND_LIBRARY_SUFFIXES STREQUAL ".a")
|
|
# Now, get the library directories and libraries for static linking.
|
|
# (XXX - what about AIX?)
|
|
execute_process(COMMAND "${PCAP_CONFIG}" "--libs" "--static"
|
|
RESULT_VARIABLE PCAP_CONFIG_RESULT
|
|
OUTPUT_VARIABLE PCAP_CONFIG_OUTPUT
|
|
)
|
|
if(NOT PCAP_CONFIG_RESULT EQUAL 0)
|
|
message(FATAL_ERROR "pcap-config --libs --static failed")
|
|
endif()
|
|
separate_arguments(LIBS_LIST UNIX_COMMAND ${PCAP_CONFIG_OUTPUT})
|
|
set(PCAP_CONFIG_STATIC_LIBRARY_DIRS "")
|
|
set(PCAP_CONFIG_STATIC_LIBRARIES "")
|
|
foreach(_arg IN LISTS LIBS_LIST)
|
|
if(_arg MATCHES "^-L")
|
|
# Add this directory to the library directory hints.
|
|
string(REGEX REPLACE "^-L" "" _dir ${_arg})
|
|
list(APPEND PCAP_CONFIG_STATIC_LIBRARY_DIRS ${_dir})
|
|
elseif(_arg MATCHES "^-l")
|
|
# Add this library to the requirements for static linking.
|
|
string(REGEX REPLACE "^-l" "" _lib ${_arg})
|
|
list(APPEND PCAP_CONFIG_STATIC_LIBRARIES ${_lib})
|
|
endif()
|
|
endforeach()
|
|
endif()
|
|
endif()
|
|
endif()
|
|
|
|
#
|
|
# Locate the actual include directory. For pkg-config the
|
|
# PC_PCAP_INCLUDE_DIRS variable could be empty if the default
|
|
# header search path is sufficient to locate the header file.
|
|
# For macOS, the directory returned by pcap-config is wrong, so
|
|
# this will make sure to find a valid path.
|
|
#
|
|
find_path(PCAP_INCLUDE_DIR
|
|
NAMES
|
|
pcap/pcap.h
|
|
pcap.h
|
|
HINTS
|
|
${PC_PCAP_INCLUDE_DIRS}
|
|
${PCAP_CONFIG_INCLUDE_DIRS}
|
|
"${PCAP_HINTS}/Include"
|
|
)
|
|
|
|
# On Windows we load wpcap.dll explicitly and probe its functions in
|
|
# capture\capture-wpcap.c. We don't want to link with pcap.lib since
|
|
# that would bring in the non-capturing (null) pcap.dll from the vcpkg
|
|
# library.
|
|
if(WIN32)
|
|
set(_pkg_required_vars PCAP_INCLUDE_DIR)
|
|
else()
|
|
find_library(PCAP_LIBRARY
|
|
NAMES
|
|
pcap
|
|
HINTS
|
|
${PC_PCAP_LIBRARY_DIRS}
|
|
${PCAP_CONFIG_LIBRARY_DIRS}
|
|
)
|
|
set(_pkg_required_vars PCAP_LIBRARY PCAP_INCLUDE_DIR)
|
|
endif()
|
|
|
|
if(UNIX AND CMAKE_FIND_LIBRARY_SUFFIXES STREQUAL ".a")
|
|
# Try to find the static library (XXX - what about AIX?)
|
|
if(PC_PCAP_FOUND)
|
|
set(_pcap_static_libraries ${PC_PCAP_STATIC_LIBRARIES})
|
|
elseif(PCAP_CONFIG)
|
|
set(_pcap_static_libraries ${PCAP_CONFIG_STATIC_LIBRARIES})
|
|
else()
|
|
#
|
|
# No pkg-config nor pcap-config found, hope that this single library is
|
|
# sufficient for static linking.
|
|
#
|
|
set(_pcap_static_libraries pcap)
|
|
endif()
|
|
|
|
set(PCAP_STATIC_LIBRARIES "")
|
|
foreach(_lib IN LISTS _pcap_static_libraries)
|
|
#
|
|
# Try to find that library, so we get its full path, as
|
|
# we do with dynamic libraries.
|
|
#
|
|
string(MAKE_C_IDENTIFIER "PCAP_STATIC_${_lib}_LIBRARY" _libvar)
|
|
find_library(${_libvar} ${_lib}
|
|
HINTS
|
|
${PC_PCAP_STATIC_LIBRARY_DIRS}
|
|
${PCAP_CONFIG_STATIC_LIBRARY_DIRS}
|
|
)
|
|
set(_libpath ${${_libvar}})
|
|
if(_libpath)
|
|
list(APPEND PCAP_STATIC_LIBRARIES ${_libpath})
|
|
endif()
|
|
endforeach()
|
|
endif()
|
|
|
|
include(FindPackageHandleStandardArgs)
|
|
find_package_handle_standard_args(PCAP DEFAULT_MSG ${_pkg_required_vars})
|
|
mark_as_advanced(${_pkg_required_vars})
|
|
|
|
if(PCAP_FOUND)
|
|
set(PCAP_INCLUDE_DIRS ${PCAP_INCLUDE_DIR})
|
|
if(UNIX AND CMAKE_FIND_LIBRARY_SUFFIXES STREQUAL ".a")
|
|
# Link with static libpcap and its transitive dependencies.
|
|
set(PCAP_LIBRARIES ${PCAP_STATIC_LIBRARIES})
|
|
else()
|
|
set(PCAP_LIBRARIES ${PCAP_LIBRARY})
|
|
endif()
|
|
|
|
#Functions
|
|
include( CMakePushCheckState )
|
|
include( CheckFunctionExists )
|
|
include( CheckVariableExists )
|
|
|
|
cmake_push_check_state()
|
|
set( CMAKE_REQUIRED_INCLUDES ${PCAP_INCLUDE_DIRS} )
|
|
set( CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARIES} )
|
|
|
|
include(CheckSymbolExists)
|
|
|
|
if(WIN32)
|
|
#
|
|
# Prepopulate some values. WinPcap 3.1 and later, and Npcap, have these
|
|
# in their SDK, and compilation checks on Windows can be slow. We check
|
|
# whether they're present at run time, when we load wpcap.dll, and work
|
|
# around their absence or report an error.
|
|
#
|
|
set(HAVE_PCAP_FREECODE TRUE)
|
|
set(HAVE_PCAP_CREATE TRUE)
|
|
set(HAVE_PCAP_FREE_DATALINKS TRUE)
|
|
set(HAVE_PCAP_OPEN TRUE)
|
|
set(HAVE_PCAP_SETSAMPLING TRUE)
|
|
set(HAVE_PCAP_SET_TSTAMP_PRECISION TRUE)
|
|
set(HAVE_PCAP_SET_TSTAMP_TYPE TRUE)
|
|
else(WIN32)
|
|
#
|
|
# Make sure we have at least libpcap 0.8, because we require at
|
|
# least libpcap 0.8's APIs.
|
|
#
|
|
# We check whether pcap_lib_version is defined in the pcap header,
|
|
# using it as a proxy for all the 0.8 API's. if not, we fail.
|
|
#
|
|
check_symbol_exists( pcap_lib_version ${PCAP_INCLUDE_DIR}/pcap.h HAVE_PCAP_LIB_VERSION )
|
|
if( NOT HAVE_PCAP_LIB_VERSION )
|
|
message(FATAL_ERROR "You need libpcap 0.8 or later")
|
|
endif( NOT HAVE_PCAP_LIB_VERSION )
|
|
|
|
check_function_exists( "pcap_freecode" HAVE_PCAP_FREECODE )
|
|
check_function_exists( "pcap_create" HAVE_PCAP_CREATE )
|
|
check_function_exists( "pcap_free_datalinks" HAVE_PCAP_FREE_DATALINKS )
|
|
check_function_exists( "pcap_open" HAVE_PCAP_OPEN )
|
|
if( HAVE_PCAP_OPEN )
|
|
#
|
|
# XXX - this *should* be checked for independently of checking
|
|
# for pcap_open(), as you might have pcap_setsampling() without
|
|
# remote capture support.
|
|
#
|
|
# However, 1) the sampling options are treated as remote options
|
|
# in the GUI and 2) having pcap_setsampling() doesn't mean
|
|
# you have sampling support. libpcap needs a way to indicate
|
|
# whether a given device supports sampling, and the GUI should
|
|
# be changed to decouple them.
|
|
#
|
|
# (Actually, libpcap needs a general mechanism to offer options
|
|
# for particular devices, and Wireshark needs to use that
|
|
# mechanism. The former is a work in progress.)
|
|
#
|
|
# (Note: another work in progress is support for remote
|
|
# capturing using pcap_create()/pcap_activate(), which we
|
|
# also need to support once it's available.)
|
|
#
|
|
check_function_exists( "pcap_setsampling" HAVE_PCAP_SETSAMPLING )
|
|
endif( HAVE_PCAP_OPEN )
|
|
endif(WIN32)
|
|
|
|
if( HAVE_PCAP_CREATE )
|
|
#
|
|
# If we have pcap_create(), we have pcap_set_buffer_size(), and
|
|
# can set the capture buffer size.
|
|
#
|
|
# Otherwise, if this is Windows, we have pcap_setbuff(), and can
|
|
# set the capture buffer size.
|
|
#
|
|
set( CAN_SET_CAPTURE_BUFFER_SIZE TRUE )
|
|
endif()
|
|
check_function_exists( "pcap_set_tstamp_precision" HAVE_PCAP_SET_TSTAMP_PRECISION )
|
|
check_function_exists( "pcap_set_tstamp_type" HAVE_PCAP_SET_TSTAMP_TYPE )
|
|
# Remote pcap checks
|
|
if( HAVE_PCAP_OPEN )
|
|
set( HAVE_PCAP_REMOTE 1 )
|
|
endif()
|
|
|
|
cmake_pop_check_state()
|
|
endif()
|
|
|
|
if(PCAP_FOUND AND NOT TARGET pcap::pcap)
|
|
if(WIN32)
|
|
add_library(pcap::pcap INTERFACE IMPORTED)
|
|
set_target_properties(pcap::pcap PROPERTIES
|
|
INTERFACE_INCLUDE_DIRECTORIES "${PCAP_INCLUDE_DIRS}"
|
|
)
|
|
else()
|
|
add_library(pcap::pcap UNKNOWN IMPORTED)
|
|
set_target_properties(pcap::pcap PROPERTIES
|
|
IMPORTED_LOCATION "${PCAP_LIBRARIES}"
|
|
INTERFACE_INCLUDE_DIRECTORIES "${PCAP_INCLUDE_DIRS}"
|
|
)
|
|
endif()
|
|
endif()
|