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Makefile
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CC = clang
LIBXDP_STATIC ?= 1
# Top-level directories.
BUILD_DIR = build
SRC_DIR = src
MODULES_DIR = modules
# Common directories.
COMMON_DIR = $(SRC_DIR)/common
ETC_DIR = /etc/xdpfw
# Project source directories.
LOADER_DIR = $(SRC_DIR)/loader
XDP_DIR = $(SRC_DIR)/xdp
RULE_ADD_DIR = $(SRC_DIR)/rule_add
RULE_DEL_DIR = $(SRC_DIR)/rule_del
# Additional build directories.
BUILD_LOADER_DIR = $(BUILD_DIR)/loader
BUILD_XDP_DIR = $(BUILD_DIR)/xdp
BUILD_RULE_ADD_DIR = $(BUILD_DIR)/rule_add
BUILD_RULE_DEL_DIR = $(BUILD_DIR)/rule_del
# XDP Tools directories.
XDP_TOOLS_DIR = $(MODULES_DIR)/xdp-tools
XDP_TOOLS_HEADERS = $(XDP_TOOLS_DIR)/headers
# LibXDP and LibBPF directories.
LIBXDP_DIR = $(XDP_TOOLS_DIR)/lib/libxdp
LIBBPF_DIR = $(XDP_TOOLS_DIR)/lib/libbpf
LIBBPF_SRC = $(LIBBPF_DIR)/src
# LibBPF objects.
LIBBPF_OBJS = $(addprefix $(LIBBPF_SRC)/staticobjs/, $(notdir $(wildcard $(LIBBPF_SRC)/staticobjs/*.o)))
# LibXDP objects.
# To Do: Figure out why static objects produces errors relating to unreferenced functions with dispatcher.
# Note: Not sure why shared objects are acting like static objects here where we can link while building and then don't require them at runtime, etc.
LIBXDP_OBJS = $(addprefix $(LIBXDP_DIR)/sharedobjs/, $(notdir $(wildcard $(LIBXDP_DIR)/sharedobjs/*.o)))
# Loader directories.
LOADER_SRC = prog.c
LOADER_OUT = xdpfw
LOADER_UTILS_DIR = $(LOADER_DIR)/utils
# Loader utils.
LOADER_UTILS_CONFIG_SRC = config.c
LOADER_UTILS_CONFIG_OBJ = config.o
LOADER_UTILS_CMDLINE_SRC = cmdline.c
LOADER_UTILS_CMDLINE_OBJ = cmdline.o
LOADER_UTILS_XDP_SRC = xdp.c
LOADER_UTILS_XDP_OBJ = xdp.o
LOADER_UTILS_LOGGING_SRC = logging.c
LOADER_UTILS_LOGGING_OBJ = logging.o
LOADER_UTILS_STATS_SRC = stats.c
LOADER_UTILS_STATS_OBJ = stats.o
LOADER_UTILS_HELPERS_SRC = helpers.c
LOADER_UTILS_HELPERS_OBJ = helpers.o
# Loader objects.
LOADER_OBJS = $(BUILD_LOADER_DIR)/$(LOADER_UTILS_CONFIG_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_CMDLINE_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_XDP_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_LOGGING_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_STATS_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_HELPERS_OBJ)
ifeq ($(LIBXDP_STATIC), 1)
LOADER_OBJS := $(LIBBPF_OBJS) $(LIBXDP_OBJS) $(LOADER_OBJS)
endif
# XDP directories.
XDP_SRC = prog.c
XDP_OBJ = xdp_prog.o
# Rule common.
RULE_OBJS = $(BUILD_LOADER_DIR)/$(LOADER_UTILS_CONFIG_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_XDP_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_LOGGING_OBJ) $(BUILD_LOADER_DIR)/$(LOADER_UTILS_HELPERS_OBJ)
ifeq ($(LIBXDP_STATIC), 1)
RULE_OBJS := $(LIBBPF_OBJS) $(LIBXDP_OBJS) $(RULE_OBJS)
endif
# Rule add.
RULE_ADD_SRC = prog.c
RULE_ADD_OUT = xdpfw-add
RULE_ADD_UTILS_DIR = $(RULE_ADD_DIR)/utils
# Rule add utils.
RULE_ADD_UTILS_CMDLINE_SRC = cmdline.c
RULE_ADD_UTILS_CMDLINE_OBJ = cmdline.o
RULE_ADD_OBJS = $(BUILD_RULE_ADD_DIR)/$(RULE_ADD_UTILS_CMDLINE_OBJ)
# Rule delete.
RULE_DEL_SRC = prog.c
RULE_DEL_OUT = xdpfw-del
RULE_DEL_UTILS_DIR = $(RULE_DEL_DIR)/utils
# Rule delete utils.
RULE_DEL_UTILS_CMDLINE_SRC = cmdline.c
RULE_DEL_UTILS_CMDLINE_OBJ = cmdline.o
RULE_DEL_OBJS = $(BUILD_RULE_DEL_DIR)/$(RULE_DEL_UTILS_CMDLINE_OBJ)
# Includes.
INCS = -I $(SRC_DIR) -I /usr/include -I /usr/local/include
ifeq ($(LIBXDP_STATIC), 1)
INCS += -I $(XDP_TOOLS_HEADERS) -I $(LIBBPF_SRC)
endif
# Flags.
FLAGS = -O2 -g
FLAGS_LOADER = -lconfig -lelf -lz
ifeq ($(LIBXDP_STATIC), 1)
FLAGS += -D__LIBXDP_STATIC__
else
FLAGS_LOADER += -lbpf -lxdp
endif
# All chains.
all: loader xdp rule_add rule_del
# Loader program.
loader: loader_utils
$(CC) $(INCS) $(FLAGS) $(FLAGS_LOADER) -o $(BUILD_LOADER_DIR)/$(LOADER_OUT) $(LOADER_OBJS) $(LOADER_DIR)/$(LOADER_SRC)
loader_utils: loader_utils_config loader_utils_cmdline loader_utils_helpers loader_utils_xdp loader_utils_logging loader_utils_stats
loader_utils_config:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_LOADER_DIR)/$(LOADER_UTILS_CONFIG_OBJ) $(LOADER_UTILS_DIR)/$(LOADER_UTILS_CONFIG_SRC)
loader_utils_cmdline:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_LOADER_DIR)/$(LOADER_UTILS_CMDLINE_OBJ) $(LOADER_UTILS_DIR)/$(LOADER_UTILS_CMDLINE_SRC)
loader_utils_xdp:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_LOADER_DIR)/$(LOADER_UTILS_XDP_OBJ) $(LOADER_UTILS_DIR)/$(LOADER_UTILS_XDP_SRC)
loader_utils_logging:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_LOADER_DIR)/$(LOADER_UTILS_LOGGING_OBJ) $(LOADER_UTILS_DIR)/$(LOADER_UTILS_LOGGING_SRC)
loader_utils_stats:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_LOADER_DIR)/$(LOADER_UTILS_STATS_OBJ) $(LOADER_UTILS_DIR)/$(LOADER_UTILS_STATS_SRC)
loader_utils_helpers:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_LOADER_DIR)/$(LOADER_UTILS_HELPERS_OBJ) $(LOADER_UTILS_DIR)/$(LOADER_UTILS_HELPERS_SRC)
# XDP program.
xdp:
$(CC) $(INCS) $(FLAGS) -target bpf -c -o $(BUILD_XDP_DIR)/$(XDP_OBJ) $(XDP_DIR)/$(XDP_SRC)
# Rule add.
rule_add: loader_utils rule_add_utils
$(CC) $(INCS) $(FLAGS) $(FLAGS_LOADER) -o $(BUILD_RULE_ADD_DIR)/$(RULE_ADD_OUT) $(RULE_OBJS) $(RULE_ADD_OBJS) $(RULE_ADD_DIR)/$(RULE_ADD_SRC)
rule_add_utils: rule_add_utils_cmdline
rule_add_utils_cmdline:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_RULE_ADD_DIR)/$(RULE_ADD_UTILS_CMDLINE_OBJ) $(RULE_ADD_UTILS_DIR)/$(RULE_ADD_UTILS_CMDLINE_SRC)
# Rule delete.
rule_del: loader_utils rule_del_utils
$(CC) $(INCS) $(FLAGS) $(FLAGS_LOADER) -o $(BUILD_RULE_DEL_DIR)/$(RULE_DEL_OUT) $(RULE_OBJS) $(RULE_DEL_OBJS) $(RULE_DEL_DIR)/$(RULE_DEL_SRC)
rule_del_utils: rule_del_utils_cmdline
rule_del_utils_cmdline:
$(CC) $(INCS) $(FLAGS) -c -o $(BUILD_RULE_DEL_DIR)/$(RULE_DEL_UTILS_CMDLINE_OBJ) $(RULE_DEL_UTILS_DIR)/$(RULE_DEL_UTILS_CMDLINE_SRC)
# LibXDP chain. We need to install objects here since our program relies on installed object files and such.
libxdp:
$(MAKE) -C $(XDP_TOOLS_DIR) libxdp
libxdp_install:
$(MAKE) -C $(LIBBPF_SRC) install
$(MAKE) -C $(LIBXDP_DIR) install
libxdp_clean:
$(MAKE) -C $(XDP_TOOLS_DIR) clean
$(MAKE) -C $(LIBBPF_SRC) clean
install:
mkdir -p $(ETC_DIR)
cp -n xdpfw.conf.example $(ETC_DIR)/xdpfw.conf
cp -n other/xdpfw.service /etc/systemd/system/
cp -f $(BUILD_LOADER_DIR)/$(LOADER_OUT) /usr/bin
cp -f $(BUILD_RULE_ADD_DIR)/$(RULE_ADD_OUT) /usr/bin
cp -f $(BUILD_RULE_DEL_DIR)/$(RULE_DEL_OUT) /usr/bin
cp -f $(BUILD_XDP_DIR)/$(XDP_OBJ) $(ETC_DIR)
clean:
find $(BUILD_DIR) -type f ! -name ".*" -exec rm -f {} +
find $(BUILD_LOADER_DIR) -type f ! -name ".*" -exec rm -f {} +
find $(BUILD_XDP_DIR) -type f ! -name ".*" -exec rm -f {} +
find $(BUILD_RULE_ADD_DIR) -type f ! -name ".*" -exec rm -f {} +
find $(BUILD_RULE_DEL_DIR) -type f ! -name ".*" -exec rm -f {} +
.PHONY: all libxdp
.DEFAULT: all