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# - Convert ASN.1 file into C source and header files that can be used to create a wireshark dissector # # A2W_OUTPUT_DIR - directory where the generated packet-${PROTOCOL_NAME}.c is # saved. The default location is meant for the Wireshark # source tree. For external dissectors, set it to the # absolute path (e.g. "${CMAKE_CURRENT_SOURCE_DIR}"). include(LocatePythonModule) locate_python_module(asn2wrs REQUIRED PATHS "${CMAKE_SOURCE_DIR}/tools") function(ASN2WRS) if(NOT PROTO_OPT) set(PROTO_OPT -p ${PROTOCOL_NAME}) elseif(PROTO_OPT STREQUAL "_EMPTY_") set(PROTO_OPT) endif() if(NOT A2W_OUTPUT_DIR) set(A2W_OUTPUT_DIR "${CMAKE_SOURCE_DIR}/epan/dissectors") endif() set(DISSECTOR "${A2W_OUTPUT_DIR}/packet-${PROTOCOL_NAME}.c") # Besides the file dependency (for timestamp comparison), add a target such # that other directories can request it to be built (ordering dependency). foreach(_v EXTRA_CNF EXPORT_DEPENDS) set(${_v}_targets) foreach(entry IN LISTS ${_v}) string(REGEX MATCH "[^/]+-exp\\.cnf$" _exp_cnf_filename "${entry}") if(_exp_cnf_filename) list(APPEND ${_v}_targets generate-${_exp_cnf_filename}) endif() endforeach() endforeach() # Creates a dissector in the source directory and store the timestamp. add_custom_command( OUTPUT packet-${PROTOCOL_NAME}-stamp COMMAND "${PYTHON_EXECUTABLE}" ${PY_ASN2WRS} ${A2W_FLAGS} ${PROTO_OPT} -c "${CMAKE_CURRENT_SOURCE_DIR}/${PROTOCOL_NAME}.cnf" -s "${CMAKE_CURRENT_SOURCE_DIR}/packet-${PROTOCOL_NAME}-template" -D "${CMAKE_CURRENT_SOURCE_DIR}" -O "${A2W_OUTPUT_DIR}" ${EXT_ASN_FILE_LIST} ${ASN_FILE_LIST} ${EXT_ASN_FILE_LIST_LATE} COMMAND "${PYTHON_EXECUTABLE}" -c "import shutil, sys; x,s,d=sys.argv; open(d, 'w'); shutil.copystat(s, d)" "${A2W_OUTPUT_DIR}/packet-${PROTOCOL_NAME}.c" packet-${PROTOCOL_NAME}-stamp DEPENDS "${PY_ASN2WRS}" ${SRC_FILES} ${EXTRA_CNF_targets} ${EXTRA_CNF} VERBATIM ) add_custom_target(generate_dissector-${PROTOCOL_NAME} ALL DEPENDS packet-${PROTOCOL_NAME}-stamp ) foreach(_asn2wrs_export_file IN LISTS EXPORT_FILES) add_custom_command( OUTPUT ${_asn2wrs_export_file} COMMAND "${PYTHON_EXECUTABLE}" "${PY_ASN2WRS}" -E ${A2W_FLAGS} ${PROTO_OPT} -c "${CMAKE_CURRENT_SOURCE_DIR}/${PROTOCOL_NAME}.cnf" -D "${CMAKE_CURRENT_SOURCE_DIR}" ${EXT_ASN_FILE_LIST} ${ASN_FILE_LIST} ${EXT_ASN_FILE_LIST_LATE} DEPENDS "${PY_ASN2WRS}" ${SRC_FILES} ${EXPORT_DEPENDS_targets} ${EXPORT_DEPENDS} ) # This target enables other dissectors to trigger the -exp cnf build add_custom_target(generate-${_asn2wrs_export_file} DEPENDS ${_asn2wrs_export_file} ) endforeach() endfunction()