1 files changed, 86 insertions, 0 deletions
diff --git a/cmake/FindPCAP.cmake b/cmake/FindPCAP.cmake
new file mode 100644
index 0000000..6e81778
--- /dev/null
+++ b/cmake/FindPCAP.cmake
@@ -0,0 +1,86 @@
+# - Try to find libpcap include dirs and libraries
+#
+# Usage of this module as follows:
+#
+#     find_package(PCAP)
+#
+# Variables used by this module, they can change the default behaviour and need
+# to be set before calling find_package:
+#
+#  PCAP_ROOT_DIR             Set this variable to the root installation of
+#                            libpcap if the module has problems finding the
+#                            proper installation path.
+#
+# Variables defined by this module:
+#
+#  PCAP_FOUND                System has libpcap, include and library dirs found
+#  PCAP_INCLUDE_DIR          The libpcap include directories.
+#  PCAP_LIBRARY              The libpcap library (possibly includes a thread
+#                            library e.g. required by pf_ring's libpcap)
+#  HAVE_PF_RING              If a found version of libpcap supports PF_RING
+
+find_path(PCAP_ROOT_DIR
+    NAMES include/pcap.h Include/pcap.h
+)
+
+find_path(PCAP_INCLUDE_DIR
+    NAMES pcap.h
+    HINTS ${PCAP_ROOT_DIR}/include
+)
+
+if ( MSVC AND COMPILER_ARCHITECTURE STREQUAL "x86_64" )
+    set(_pcap_lib_hint_path ${PCAP_ROOT_DIR}/lib/x64)
+else()
+    set(_pcap_lib_hint_path ${PCAP_ROOT_DIR}/lib)
+endif()
+
+find_library(PCAP_LIBRARY
+    NAMES pcap wpcap
+    HINTS ${_pcap_lib_hint_path}
+)
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(PCAP DEFAULT_MSG
+    PCAP_LIBRARY
+    PCAP_INCLUDE_DIR
+)
+
+include(CheckCSourceCompiles)
+set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
+check_c_source_compiles("int main() { return 0; }" PCAP_LINKS_SOLO)
+set(CMAKE_REQUIRED_LIBRARIES)
+
+# check if linking against libpcap also needs to link against a thread library
+if (NOT PCAP_LINKS_SOLO)
+    find_package(Threads)
+    if (THREADS_FOUND)
+        set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
+        check_c_source_compiles("int main() { return 0; }" PCAP_NEEDS_THREADS)
+        set(CMAKE_REQUIRED_LIBRARIES)
+    endif ()
+    if (THREADS_FOUND AND PCAP_NEEDS_THREADS)
+        set(_tmp ${PCAP_LIBRARY} ${CMAKE_THREAD_LIBS_INIT})
+        list(REMOVE_DUPLICATES _tmp)
+        set(PCAP_LIBRARY ${_tmp}
+            CACHE STRING "Libraries needed to link against libpcap" FORCE)
+    else ()
+        message(FATAL_ERROR "Couldn't determine how to link against libpcap")
+    endif ()
+endif ()
+
+string(FIND "${PCAP_LIBRARY}" "wpcap" _pcap_lib_is_wpcap)
+if ( _pcap_lib_is_wpcap GREATER_EQUAL 0 )
+    set(HAVE_WPCAP TRUE)
+endif()
+
+include(CheckFunctionExists)
+set(CMAKE_REQUIRED_LIBRARIES ${PCAP_LIBRARY})
+check_function_exists(pcap_get_pfring_id HAVE_PF_RING)
+check_function_exists(pcap_dump_open_append HAVE_PCAP_DUMP_OPEN_APPEND)
+set(CMAKE_REQUIRED_LIBRARIES)
+
+mark_as_advanced(
+    PCAP_ROOT_DIR
+    PCAP_INCLUDE_DIR
+    PCAP_LIBRARY
+)
\ No newline at end of file