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Makefile
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Makefile
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CC = clang
LLC = llc
ARCH := $(shell uname -m | sed 's/x86_64/x86/')
# Main directories.
BUILDDIR = build
SRCDIR = src
MODULEDIR = modules
# XDP Tools directory.
XDPTOOLSDIR = $(MODULEDIR)/xdp-tools
XDPTOOLSHEADERS = $(XDPTOOLSDIR)/headers
# LibXDP and LibBPF directories.
LIBXDPDIR = $(XDPTOOLSDIR)/lib/libxdp
LIBBPFDIR = $(XDPTOOLSDIR)/lib/libbpf
LIBBPFSRC = $(LIBBPFDIR)/src
# LibBPF objects.
LIBBPFOBJS = $(LIBBPFSRC)/staticobjs/bpf_prog_linfo.o $(LIBBPFSRC)/staticobjs/bpf.o $(LIBBPFSRC)/staticobjs/btf_dump.o
LIBBPFOBJS += $(LIBBPFSRC)/staticobjs/btf.o $(LIBBPFSRC)/staticobjs/gen_loader.o $(LIBBPFSRC)/staticobjs/hashmap.o
LIBBPFOBJS += $(LIBBPFSRC)/staticobjs/libbpf_errno.o $(LIBBPFSRC)/staticobjs/libbpf_probes.o $(LIBBPFSRC)/staticobjs/libbpf.o
LIBBPFOBJS += $(LIBBPFSRC)/staticobjs/linker.o $(LIBBPFSRC)/staticobjs/netlink.o $(LIBBPFSRC)/staticobjs/nlattr.o
LIBBPFOBJS += $(LIBBPFSRC)/staticobjs/relo_core.o $(LIBBPFSRC)/staticobjs/ringbuf.o $(LIBBPFSRC)/staticobjs/str_error.o
LIBBPFOBJS += $(LIBBPFSRC)/staticobjs/strset.o $(LIBBPFSRC)/staticobjs/usdt.o $(LIBBPFSRC)/staticobjs/zip.o
# LibXDP objects.
# To Do: Figure out why static objects produces errors relating to unreferenced functions with dispatcher.
LIBXDPOBJS = $(LIBXDPDIR)/sharedobjs/xsk.o $(LIBXDPDIR)/sharedobjs/libxdp.o
# Main program's objects.
CONFIGSRC = config.c
CONFIGOBJ = config.o
CMDLINESRC = cmdline.c
CMDLINEOBJ = cmdline.o
XDPFWSRC = xdpfw.c
XDPFWOUT = xdpfw
XDPPROGSRC = xdpfw_kern.c
XDPPROGLL = xdpfw_kern.ll
XDPPROGOBJ = xdpfw_kern.o
OBJS = $(BUILDDIR)/$(CONFIGOBJ) $(BUILDDIR)/$(CMDLINEOBJ)
# LD flags and includes.
LDFLAGS += -lconfig -lelf -lz
INCS = -I $(LIBBPFSRC)
INCS += -I /usr/include -I /usr/local/include
# All chain.
all: xdpfw xdpfw_filter utils
# User space application chain.
xdpfw: utils libxdp $(OBJS)
mkdir -p $(BUILDDIR)/
$(CC) $(LDFLAGS) $(INCS) -o $(BUILDDIR)/$(XDPFWOUT) $(LIBBPFOBJS) $(LIBXDPOBJS) $(OBJS) $(SRCDIR)/$(XDPFWSRC)
# XDP program chain.
xdpfw_filter:
mkdir -p $(BUILDDIR)/
$(CC) $(INCS) -D__BPF__ -D __BPF_TRACING__ -Wno-unused-value -Wno-pointer-sign -Wno-compare-distinct-pointer-types -O2 -emit-llvm -c -g -o $(BUILDDIR)/$(XDPPROGLL) $(SRCDIR)/$(XDPPROGSRC)
$(LLC) -march=bpf -filetype=obj -o $(BUILDDIR)/$(XDPPROGOBJ) $(BUILDDIR)/$(XDPPROGLL)
# Utils chain.
utils:
mkdir -p $(BUILDDIR)/
$(CC) -O2 -c -o $(BUILDDIR)/$(CONFIGOBJ) $(SRCDIR)/$(CONFIGSRC)
$(CC) -O2 -c -o $(BUILDDIR)/$(CMDLINEOBJ) $(SRCDIR)/$(CMDLINESRC)
# LibXDP chain. We need to install objects here since our program relies on installed object files and such.
libxdp:
$(MAKE) -C $(XDPTOOLSDIR) libxdp
sudo $(MAKE) -C $(LIBBPFSRC) install
sudo $(MAKE) -C $(LIBXDPDIR) install
# Clean chain.
clean:
$(MAKE) -C $(LIBBPFSRC) clean
$(MAKE) -C $(XDPTOOLSDIR) clean
rm -f $(BUILDDIR)/*.o $(BUILDDIR)/*.bc
rm -f $(BUILDDIR)/$(XDPFWOUT)
# Install chain.
install:
mkdir -p /etc/xdpfw/
cp -n xdpfw.conf.example /etc/xdpfw/xdpfw.conf
cp $(BUILDDIR)/$(XDPPROGOBJ) /etc/xdpfw/$(XDPPROGOBJ)
cp $(BUILDDIR)/$(XDPFWOUT) /usr/bin/$(XDPFWOUT)
cp -n other/xdpfw.service /etc/systemd/system/
.PHONY: libxdp all
.DEFAULT: all