CMAKE_MINIMUM_REQUIRED(VERSION 3.0.2)
PROJECT(subnetcalc LANGUAGES C CXX)

SET(BUILD_MAJOR "2")
SET(BUILD_MINOR "4")
SET(BUILD_PATCH "13")
SET(BUILD_VERSION ${BUILD_MAJOR}.${BUILD_MINOR}.${BUILD_PATCH})


#############################################################################
# INSTALLATION_DIRECTORIES
#############################################################################

# See: https://cmake.org/cmake/help/v3.0/module/GNUInstallDirs.html
INCLUDE(GNUInstallDirs)


#############################################################################
# PACKAGING
#############################################################################

SET(CPACK_SOURCE_GENERATOR "TXZ")
SET(CPACK_SOURCE_PACKAGE_FILE_NAME
   "${CMAKE_PROJECT_NAME}-${BUILD_MAJOR}.${BUILD_MINOR}.${BUILD_PATCH}")
SET(CPACK_SOURCE_IGNORE_FILES
   "${PROJECT_SOURCE_DIR}/${CMAKE_PROJECT_NAME}-*;${PROJECT_SOURCE_DIR}/${CMAKE_PROJECT_NAME}_*;/build/;/.git/;/config.log;/CMakeFiles/;CMakeCache.txt$;.cmake$;.tar.gz$;/_CPack_Packages;/Makefile$;~$;/build-deb;/clean-deb;/filter-empty-entries;/make-symbols;/make-ppa;/make-deb;/debian.conf;/make-rpm;/rpm.conf;${CPACK_SOURCE_IGNORE_FILES}")
INCLUDE(CPack)

ADD_CUSTOM_TARGET(dist COMMAND ${CMAKE_MAKE_PROGRAM} clean package_source)


INCLUDE(CheckIncludeFile)
INCLUDE(CheckStructHasMember)


#############################################################################
# OS DEPENDENT
#############################################################################

IF (${CMAKE_SYSTEM_NAME} MATCHES "Linux")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    ADD_DEFINITIONS("-DLINUX")
    FIND_LIBRARY(SCTP_LIB sctp)

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    SET(CMAKE_REQUIRED_INCLUDES "/usr/local/include" "/usr/include")
    SET(CMAKE_LIBRARY_PATH "/usr/local/lib")
    INCLUDE_DIRECTORIES("/usr/local/include")
    ADD_DEFINITIONS("-DFreeBSD")

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    SET(CMAKE_REQUIRED_INCLUDES "/usr/local/include" "/usr/include" "/usr/local/opt/openssl/include")
    SET(CMAKE_LIBRARY_PATH "/usr/local/lib")
    INCLUDE_DIRECTORIES("/usr/local/include" "/usr/local/opt/openssl/include")
    ADD_DEFINITIONS("-DDARWIN")

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    LIST(APPEND neat_headers neat_bsd.h)
    LIST(APPEND neat_sources neat_bsd.c)
    SET(CMAKE_REQUIRED_INCLUDES "/usr/pkg/include" "/usr/include" "/usr/local/include")
    SET(CMAKE_LIBRARY_PATH "/usr/local/lib")
    INCLUDE_DIRECTORIES("/usr/pkg/include" "/usr/local/include")
    ADD_DEFINITIONS("-DNetBSD")

ELSEIF (${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
    MESSAGE(STATUS ${CMAKE_SYSTEM_NAME} " supported")
    ADD_DEFINITIONS("-DSOLARIS")

ELSE()
    MESSAGE(FATAL_ERROR ${CMAKE_SYSTEM_NAME} " not supported (yet?)")

ENDIF()

FIND_PACKAGE(Threads REQUIRED)


#############################################################################
# CHECK STRUCT MEMBERS
#############################################################################

CHECK_STRUCT_HAS_MEMBER("struct sockaddr" "sa_len" "sys/types.h;sys/socket.h" HAVE_SA_LEN)
IF (HAVE_SA_LEN)
    MESSAGE(STATUS "HAVE_SA_LEN")
    ADD_DEFINITIONS(-DHAVE_SA_LEN)
ENDIF()

CHECK_STRUCT_HAS_MEMBER("struct sockaddr_in" "sin_len" "sys/types.h;netinet/in.h" HAVE_SIN_LEN)
IF (HAVE_SIN_LEN)
    MESSAGE(STATUS "HAVE_SIN_LEN")
    ADD_DEFINITIONS(-DHAVE_SIN_LEN)
ENDIF()

CHECK_STRUCT_HAS_MEMBER("struct sockaddr_in6" "sin6_len" "sys/types.h;netinet/in.h" HAVE_SIN6_LEN)
IF (HAVE_SIN6_LEN)
    MESSAGE(STATUS "HAVE_SIN6_LEN")
    ADD_DEFINITIONS(-DHAVE_SIN6_LEN)
ENDIF()

CHECK_STRUCT_HAS_MEMBER("struct sockaddr_storage" "ss_len" "sys/types.h;sys/socket.h" HAVE_SS_LEN)
IF (HAVE_SS_LEN)
    MESSAGE(STATUS "HAVE_SS_LEN")
    ADD_DEFINITIONS(-DHAVE_SS_LEN)
ENDIF()


#############################################################################
# REQUIREMENTS
#############################################################################

# ###### GeoIP ##############################################################
FIND_PACKAGE(PkgConfig)
PKG_SEARCH_MODULE(GEOIP geoip)

FIND_PATH(GEOIP_INCLUDE_DIR GeoIP.h
  HINTS
    "${GEOIP_INCLUDEDIR}"
    "${GEOIP_HINTS}/include"
)
FIND_LIBRARY(GEOIP_LIBRARY NAMES GeoIP
  HINTS
    "${GEOIP_LIBDIR}"
    "${GEOIP_HINTS}/lib"
  )

IF (GEOIP_FOUND)
   INCLUDE_DIRECTORIES(${GEOIP_INCLUDE_DIR})
   ADD_DEFINITIONS(-DHAVE_GEOIP -DHAVE_GEOIP_IPV6)
ENDIF()


#############################################################################
# COMPILER FLAGS
#############################################################################

SET(CMAKE_C_FLAGS   "${CMAKE_C_FLAGS}   -Wall")
SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")

IF (CMAKE_BUILD_TYPE MATCHES DEBUG)
    MESSAGE(STATUS "Building in DEBUG mode")
    # _FORTIFY_SOURCE requires compiling with optimization
    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O")
ENDIF()


#############################################################################
# SUBDIRECTORIES
#############################################################################

ADD_SUBDIRECTORY(src)
