feat: add Makefile for eBPF program compilation and management

Signed-off-by: Dengfeng Liu <[email protected]>

ebpf/Makefile

@@ -0,0 +1,33 @@
+LLC ?= llc
+CLANG ?= clang
+CC ?= gcc
+
+BPF_CFLAGS = -I$(PWD)
+
+all: aw-bpf.o update-ipv4_map
+
+# eBPF program compilation
+aw-bpf.o: aw-bpf.c
+	$(CLANG) -O2 -target bpf -c $< $(BPF_CFLAGS) -o $@
+
+# User space program compilation
+update-ipv4_map: update-ipv4_map.c
+	$(CC) -O2 -o $@ $< -lbpf
+
+clean:
+	rm -f aw-bpf.o update-ipv4_map
+
+# load ebpf program to the kernel by tc in both egress and ingress
+load: aw-bpf.o
+	sudo tc qdisc add dev eth0 clsact
+	sudo tc filter add dev eth0 egress bpf da obj aw-bpf.o sec egress
+	sudo tc filter add dev eth0 ingress bpf da obj aw-bpf.o sec ingress
+
+unload:
+	sudo tc filter del dev eth0 egress
+	sudo tc filter del dev eth0 ingress
+	sudo tc qdisc del dev eth0 clsact
+
+status:
+	sudo tc filter show dev eth0
+	sudo tc qdisc show dev eth0