实现基础的DDoS防护

internal/firewalls/nftables/chain_test.go

@@ -0,0 +1,130 @@
+// Copyright 2022 Liuxiangchao iwind.liu@gmail.com. All rights reserved.
+//go:build linux
+// +build linux
+
+package nftables_test
+
+import (
+	"github.com/TeaOSLab/EdgeNode/internal/firewalls/nftables"
+	"net"
+	"testing"
+)
+
+func getIPv4Chain(t *testing.T) *nftables.Chain {
+	var conn = nftables.NewConn()
+	table, err := conn.GetTable("test_ipv4", nftables.TableFamilyIPv4)
+	if err != nil {
+		if err == nftables.ErrTableNotFound {
+			table, err = conn.AddIPv4Table("test_ipv4")
+			if err != nil {
+				t.Fatal(err)
+			}
+		} else {
+			t.Fatal(err)
+		}
+	}
+
+	chain, err := table.GetChain("test_chain")
+	if err != nil {
+		if err == nftables.ErrChainNotFound {
+			chain, err = table.AddAcceptChain("test_chain")
+		}
+	}
+
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	return chain
+}
+
+func TestChain_AddAcceptIPRule(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	_, err := chain.AddAcceptIPv4Rule(net.ParseIP("192.168.2.40").To4(), nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChain_AddDropIPRule(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	_, err := chain.AddDropIPv4Rule(net.ParseIP("192.168.2.31").To4(), nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChain_AddAcceptSetRule(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	_, err := chain.AddAcceptIPv4SetRule("ipv4_black_set", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChain_AddDropSetRule(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	_, err := chain.AddDropIPv4SetRule("ipv4_black_set", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChain_AddRejectSetRule(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	_, err := chain.AddRejectIPv4SetRule("ipv4_black_set", nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChain_GetRuleWithUserData(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	rule, err := chain.GetRuleWithUserData([]byte("test"))
+	if err != nil {
+		if err == nftables.ErrRuleNotFound {
+			t.Log("rule not found")
+			return
+		} else {
+			t.Fatal(err)
+		}
+	}
+	t.Log("rule:", rule)
+}
+
+func TestChain_GetRules(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	rules, err := chain.GetRules()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, rule := range rules {
+		t.Log("handle:", rule.Handle(), "set name:", rule.LookupSetName(),
+			"verdict:", rule.VerDict(), "user data:", string(rule.UserData()))
+	}
+}
+
+func TestChain_DeleteRule(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	rule, err := chain.GetRuleWithUserData([]byte("test"))
+	if err != nil {
+		if err == nftables.ErrRuleNotFound {
+			t.Log("rule not found")
+			return
+		}
+		t.Fatal(err)
+	}
+	err = chain.DeleteRule(rule)
+	if err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestChain_Flush(t *testing.T) {
+	var chain = getIPv4Chain(t)
+	err := chain.Flush()
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Log("ok")
+}