mirror of
https://github.com/netbirdio/netbird.git
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346 lines
12 KiB
Go
346 lines
12 KiB
Go
//go:build !android
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package iptables
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import (
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"context"
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"net/netip"
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"os/exec"
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"testing"
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"github.com/coreos/go-iptables/iptables"
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log "github.com/sirupsen/logrus"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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firewall "github.com/netbirdio/netbird/client/firewall/manager"
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"github.com/netbirdio/netbird/client/firewall/test"
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)
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func isIptablesSupported() bool {
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_, err4 := exec.LookPath("iptables")
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return err4 == nil
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}
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func TestIptablesManager_RestoreOrCreateContainers(t *testing.T) {
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if !isIptablesSupported() {
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t.SkipNow()
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}
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iptablesClient, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
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require.NoError(t, err, "failed to init iptables client")
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manager, err := newRouter(context.TODO(), iptablesClient, ifaceMock)
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require.NoError(t, err, "should return a valid iptables manager")
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defer func() {
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_ = manager.Reset()
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}()
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require.Len(t, manager.rules, 2, "should have created rules map")
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exists, err := manager.iptablesClient.Exists(tableNat, chainPOSTROUTING, manager.rules[ipv4Nat]...)
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require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainPOSTROUTING)
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require.True(t, exists, "postrouting rule should exist")
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pair := firewall.RouterPair{
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ID: "abc",
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Source: netip.MustParsePrefix("100.100.100.1/32"),
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Destination: netip.MustParsePrefix("100.100.100.0/24"),
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Masquerade: true,
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}
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forward4Rule := []string{"-s", pair.Source.String(), "-d", pair.Destination.String(), "-j", routingFinalForwardJump}
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err = manager.iptablesClient.Insert(tableFilter, chainRTFWD, 1, forward4Rule...)
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require.NoError(t, err, "inserting rule should not return error")
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nat4Rule := genRuleSpec(routingFinalNatJump, pair.Source, pair.Destination, ifaceMock.Name(), false)
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err = manager.iptablesClient.Insert(tableNat, chainRTNAT, 1, nat4Rule...)
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require.NoError(t, err, "inserting rule should not return error")
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err = manager.Reset()
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require.NoError(t, err, "shouldn't return error")
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}
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func TestIptablesManager_AddNatRule(t *testing.T) {
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if !isIptablesSupported() {
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t.SkipNow()
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}
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for _, testCase := range test.InsertRuleTestCases {
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t.Run(testCase.Name, func(t *testing.T) {
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iptablesClient, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
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require.NoError(t, err, "failed to init iptables client")
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manager, err := newRouter(context.TODO(), iptablesClient, ifaceMock)
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require.NoError(t, err, "shouldn't return error")
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defer func() {
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err := manager.Reset()
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if err != nil {
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log.Errorf("failed to reset iptables manager: %s", err)
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}
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}()
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err = manager.AddNatRule(testCase.InputPair)
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require.NoError(t, err, "forwarding pair should be inserted")
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natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair)
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natRule := genRuleSpec(routingFinalNatJump, testCase.InputPair.Source, testCase.InputPair.Destination, ifaceMock.Name(), false)
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exists, err := iptablesClient.Exists(tableNat, chainRTNAT, natRule...)
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require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
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if testCase.InputPair.Masquerade {
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require.True(t, exists, "nat rule should be created")
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foundNatRule, foundNat := manager.rules[natRuleKey]
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require.True(t, foundNat, "nat rule should exist in the map")
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require.Equal(t, natRule[:4], foundNatRule[:4], "stored nat rule should match")
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} else {
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require.False(t, exists, "nat rule should not be created")
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_, foundNat := manager.rules[natRuleKey]
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require.False(t, foundNat, "nat rule should not exist in the map")
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}
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inNatRuleKey := firewall.GenKey(firewall.NatFormat, firewall.GetInversePair(testCase.InputPair))
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inNatRule := genRuleSpec(routingFinalNatJump, firewall.GetInversePair(testCase.InputPair).Source, firewall.GetInversePair(testCase.InputPair).Destination, ifaceMock.Name(), true)
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exists, err = iptablesClient.Exists(tableNat, chainRTNAT, inNatRule...)
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require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
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if testCase.InputPair.Masquerade {
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require.True(t, exists, "income nat rule should be created")
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foundNatRule, foundNat := manager.rules[inNatRuleKey]
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require.True(t, foundNat, "income nat rule should exist in the map")
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require.Equal(t, inNatRule[:4], foundNatRule[:4], "stored income nat rule should match")
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} else {
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require.False(t, exists, "nat rule should not be created")
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_, foundNat := manager.rules[inNatRuleKey]
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require.False(t, foundNat, "income nat rule should not exist in the map")
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}
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})
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}
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}
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func TestIptablesManager_RemoveNatRule(t *testing.T) {
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if !isIptablesSupported() {
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t.SkipNow()
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}
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for _, testCase := range test.RemoveRuleTestCases {
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t.Run(testCase.Name, func(t *testing.T) {
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iptablesClient, _ := iptables.NewWithProtocol(iptables.ProtocolIPv4)
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manager, err := newRouter(context.TODO(), iptablesClient, ifaceMock)
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require.NoError(t, err, "shouldn't return error")
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defer func() {
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_ = manager.Reset()
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}()
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require.NoError(t, err, "shouldn't return error")
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natRuleKey := firewall.GenKey(firewall.NatFormat, testCase.InputPair)
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natRule := genRuleSpec(routingFinalNatJump, testCase.InputPair.Source, testCase.InputPair.Destination, ifaceMock.Name(), false)
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err = iptablesClient.Insert(tableNat, chainRTNAT, 1, natRule...)
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require.NoError(t, err, "inserting rule should not return error")
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inNatRuleKey := firewall.GenKey(firewall.NatFormat, firewall.GetInversePair(testCase.InputPair))
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inNatRule := genRuleSpec(routingFinalNatJump, firewall.GetInversePair(testCase.InputPair).Source, firewall.GetInversePair(testCase.InputPair).Destination, ifaceMock.Name(), true)
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err = iptablesClient.Insert(tableNat, chainRTNAT, 1, inNatRule...)
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require.NoError(t, err, "inserting rule should not return error")
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err = manager.Reset()
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require.NoError(t, err, "shouldn't return error")
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err = manager.RemoveNatRule(testCase.InputPair)
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require.NoError(t, err, "shouldn't return error")
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exists, err := iptablesClient.Exists(tableNat, chainRTNAT, natRule...)
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require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
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require.False(t, exists, "nat rule should not exist")
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_, found := manager.rules[natRuleKey]
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require.False(t, found, "nat rule should exist in the manager map")
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exists, err = iptablesClient.Exists(tableNat, chainRTNAT, inNatRule...)
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require.NoError(t, err, "should be able to query the iptables %s table and %s chain", tableNat, chainRTNAT)
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require.False(t, exists, "income nat rule should not exist")
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_, found = manager.rules[inNatRuleKey]
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require.False(t, found, "income nat rule should exist in the manager map")
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})
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}
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}
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func TestRouter_AddRouteFiltering(t *testing.T) {
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if !isIptablesSupported() {
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t.Skip("iptables not supported on this system")
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}
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iptablesClient, err := iptables.NewWithProtocol(iptables.ProtocolIPv4)
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require.NoError(t, err, "Failed to create iptables client")
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r, err := newRouter(context.Background(), iptablesClient, ifaceMock)
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require.NoError(t, err, "Failed to create router manager")
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defer func() {
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err := r.Reset()
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require.NoError(t, err, "Failed to reset router")
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}()
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tests := []struct {
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name string
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sources []netip.Prefix
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destination netip.Prefix
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proto firewall.Protocol
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sPort *firewall.Port
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dPort *firewall.Port
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direction firewall.RuleDirection
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action firewall.Action
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expectSet bool
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}{
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{
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name: "Basic TCP rule with single source",
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sources: []netip.Prefix{netip.MustParsePrefix("192.168.1.0/24")},
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destination: netip.MustParsePrefix("10.0.0.0/24"),
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proto: firewall.ProtocolTCP,
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sPort: nil,
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dPort: &firewall.Port{Values: []int{80}},
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direction: firewall.RuleDirectionIN,
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action: firewall.ActionAccept,
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expectSet: false,
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},
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{
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name: "UDP rule with multiple sources",
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sources: []netip.Prefix{
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netip.MustParsePrefix("172.16.0.0/16"),
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netip.MustParsePrefix("192.168.0.0/16"),
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},
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destination: netip.MustParsePrefix("10.0.0.0/8"),
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proto: firewall.ProtocolUDP,
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sPort: &firewall.Port{Values: []int{1024, 2048}, IsRange: true},
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dPort: nil,
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direction: firewall.RuleDirectionOUT,
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action: firewall.ActionDrop,
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expectSet: true,
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},
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{
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name: "All protocols rule",
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sources: []netip.Prefix{netip.MustParsePrefix("10.0.0.0/8")},
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destination: netip.MustParsePrefix("0.0.0.0/0"),
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proto: firewall.ProtocolALL,
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sPort: nil,
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dPort: nil,
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direction: firewall.RuleDirectionIN,
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action: firewall.ActionAccept,
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expectSet: false,
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},
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{
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name: "ICMP rule",
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sources: []netip.Prefix{netip.MustParsePrefix("192.168.0.0/16")},
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destination: netip.MustParsePrefix("10.0.0.0/8"),
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proto: firewall.ProtocolICMP,
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sPort: nil,
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dPort: nil,
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direction: firewall.RuleDirectionIN,
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action: firewall.ActionAccept,
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expectSet: false,
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},
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{
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name: "TCP rule with multiple source ports",
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sources: []netip.Prefix{netip.MustParsePrefix("172.16.0.0/12")},
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destination: netip.MustParsePrefix("192.168.0.0/16"),
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proto: firewall.ProtocolTCP,
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sPort: &firewall.Port{Values: []int{80, 443, 8080}},
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dPort: nil,
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direction: firewall.RuleDirectionOUT,
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action: firewall.ActionAccept,
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expectSet: false,
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},
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{
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name: "UDP rule with single IP and port range",
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sources: []netip.Prefix{netip.MustParsePrefix("192.168.1.1/32")},
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destination: netip.MustParsePrefix("10.0.0.0/24"),
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proto: firewall.ProtocolUDP,
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sPort: nil,
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dPort: &firewall.Port{Values: []int{5000, 5100}, IsRange: true},
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direction: firewall.RuleDirectionIN,
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action: firewall.ActionDrop,
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expectSet: false,
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},
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{
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name: "TCP rule with source and destination ports",
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sources: []netip.Prefix{netip.MustParsePrefix("10.0.0.0/24")},
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destination: netip.MustParsePrefix("172.16.0.0/16"),
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proto: firewall.ProtocolTCP,
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sPort: &firewall.Port{Values: []int{1024, 65535}, IsRange: true},
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dPort: &firewall.Port{Values: []int{22}},
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direction: firewall.RuleDirectionOUT,
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action: firewall.ActionAccept,
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expectSet: false,
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},
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{
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name: "Drop all incoming traffic",
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sources: []netip.Prefix{netip.MustParsePrefix("0.0.0.0/0")},
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destination: netip.MustParsePrefix("192.168.0.0/24"),
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proto: firewall.ProtocolALL,
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sPort: nil,
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dPort: nil,
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direction: firewall.RuleDirectionIN,
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action: firewall.ActionDrop,
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expectSet: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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ruleKey, err := r.AddRouteFiltering(tt.sources, tt.destination, tt.proto, tt.sPort, tt.dPort, tt.action)
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require.NoError(t, err, "AddRouteFiltering failed")
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// Check if the rule is in the internal map
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rule, ok := r.rules[ruleKey.GetRuleID()]
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assert.True(t, ok, "Rule not found in internal map")
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// Log the internal rule
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t.Logf("Internal rule: %v", rule)
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// Check if the rule exists in iptables
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exists, err := iptablesClient.Exists(tableFilter, chainRTFWD, rule...)
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assert.NoError(t, err, "Failed to check rule existence")
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assert.True(t, exists, "Rule not found in iptables")
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// Verify rule content
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params := routeFilteringRuleParams{
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Sources: tt.sources,
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Destination: tt.destination,
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Proto: tt.proto,
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SPort: tt.sPort,
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DPort: tt.dPort,
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Action: tt.action,
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SetName: "",
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}
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expectedRule := genRouteFilteringRuleSpec(params)
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if tt.expectSet {
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setName := firewall.GenerateSetName(tt.sources)
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params.SetName = setName
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expectedRule = genRouteFilteringRuleSpec(params)
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// Check if the set was created
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_, exists := r.ipsetCounter.Get(setName)
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assert.True(t, exists, "IPSet not created")
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}
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assert.Equal(t, expectedRule, rule, "Rule content mismatch")
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// Clean up
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err = r.DeleteRouteRule(ruleKey)
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require.NoError(t, err, "Failed to delete rule")
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})
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}
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}
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