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netlink/route_test.go

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//go:build linux
// +build linux
package netlink
import (
"net"
"os"
"runtime"
"strconv"
"testing"
"time"
"github.com/vishvananda/netlink/nl"
"github.com/vishvananda/netns"
"golang.org/x/sys/unix"
)
func TestRouteAddDel(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 1, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
routes, err = RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not listed properly")
}
dstIP := net.IPv4(192, 168, 0, 42)
routeToDstIP, err := RouteGet(dstIP)
if err != nil {
t.Fatal(err)
}
if len(routeToDstIP) == 0 {
t.Fatal("Default route not present")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
// add default route test
// equiv: default dev lo
_, defaultDst, _ := net.ParseCIDR("0.0.0.0/0")
route = Route{Dst: defaultDst, LinkIndex: link.Attrs().Index}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Dev default route not listed properly")
}
if err := RouteDel(&routes[0]); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Dev default route not removed properly")
}
// equiv: blackhole default
route = Route{Dst: defaultDst, Type: unix.RTN_BLACKHOLE, Family: FAMILY_V4}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
t.Logf("%+v", routes)
if len(routes) != 1 {
t.Fatal("Blackhole default route not listed properly")
}
if err := RouteDel(&routes[0]); err != nil {
t.Fatal(err)
}
routes, err = RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Blackhole default route not removed properly")
}
// equiv: prohibit default
route = Route{Dst: defaultDst, Type: unix.RTN_PROHIBIT}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Prohibit default route not listed properly")
}
if err := RouteDel(&routes[0]); err != nil {
t.Fatal(err)
}
routes, err = RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Prohibit default route not removed properly")
}
}
func TestRoute6AddDel(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// create dummy interface
// IPv6 route added to loopback interface will be unreachable
la := NewLinkAttrs()
la.Name = "dummy_route6"
la.TxQLen = 1500
dummy := &Dummy{LinkAttrs: la}
if err := LinkAdd(dummy); err != nil {
t.Fatal(err)
}
// get dummy interface
link, err := LinkByName("dummy_route6")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// remember number of routes before adding
// typically one route (fe80::/64) will be created when dummy_route6 is created
routes, err := RouteList(link, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
nroutes := len(routes)
// add a gateway route
dst := &net.IPNet{
IP: net.ParseIP("2001:db8::0"),
Mask: net.CIDRMask(64, 128),
}
route := Route{LinkIndex: link.Attrs().Index, Dst: dst}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes+1 {
t.Fatal("Route not added properly")
}
dstIP := net.ParseIP("2001:db8::1")
routeToDstIP, err := RouteGet(dstIP)
if err != nil {
t.Fatal(err)
}
// cleanup route
if len(routeToDstIP) == 0 {
t.Fatal("Route not present")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes {
t.Fatal("Route not removed properly")
}
// add a default link route
_, defaultDst, _ := net.ParseCIDR("::/0")
route = Route{LinkIndex: link.Attrs().Index, Dst: defaultDst}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes+1 {
t.Fatal("Default route not added properly")
}
// add a default link route
for _, route := range routes {
if route.Dst.String() == defaultDst.String() {
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
}
}
routes, err = RouteList(link, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes {
t.Fatal("Default route not removed properly")
}
// add blackhole default link route
routes, err = RouteList(nil, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
nroutes = len(routes)
route = Route{Type: unix.RTN_BLACKHOLE, Dst: defaultDst}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(nil, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes+1 {
t.Fatal("Blackhole default route not added properly")
}
// add blackhole default link route
for _, route := range routes {
if ipNetEqual(route.Dst, defaultDst) {
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
}
}
routes, err = RouteList(nil, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes {
t.Fatal("Blackhole default route not removed properly")
}
// add prohibit default link route
routes, err = RouteList(nil, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
nroutes = len(routes)
route = Route{Type: unix.RTN_BLACKHOLE, Dst: defaultDst}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(nil, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes+1 {
t.Fatal("Prohibit default route not added properly")
}
// add prohibit default link route
for _, route := range routes {
if ipNetEqual(route.Dst, defaultDst) {
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
}
}
routes, err = RouteList(nil, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != nroutes {
t.Fatal("Prohibit default route not removed properly")
}
// cleanup dummy interface created for the test
if err := LinkDel(link); err != nil {
t.Fatal(err)
}
}
func TestRouteChange(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 1, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteChange(&route); err == nil {
t.Fatal("Route added while it should fail")
}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
ip = net.IPv4(127, 1, 1, 2)
route = Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteChange(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 || !routes[0].Src.Equal(ip) {
t.Fatal("Route not changed properly")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestRouteReplace(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 1, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
ip = net.IPv4(127, 1, 1, 2)
route = Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteReplace(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 || !routes[0].Src.Equal(ip) {
t.Fatal("Route not replaced properly")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestRouteAppend(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 1, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
ip = net.IPv4(127, 1, 1, 2)
route = Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteAppend(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 2 || !routes[1].Src.Equal(ip) {
t.Fatal("Route not append properly")
}
if err := RouteDel(&routes[0]); err != nil {
t.Fatal(err)
}
if err := RouteDel(&routes[1]); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestRouteAddIncomplete(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
route := Route{LinkIndex: link.Attrs().Index}
if err := RouteAdd(&route); err == nil {
t.Fatal("Adding incomplete route should fail")
}
}
// expectRouteUpdate returns whether the expected updated is received within one minute.
func expectRouteUpdate(ch <-chan RouteUpdate, t, f uint16, dst net.IP) bool {
for {
timeout := time.After(time.Minute)
select {
case update := <-ch:
if update.Type == t &&
update.NlFlags == f &&
update.Route.Dst != nil &&
update.Route.Dst.IP.Equal(dst) {
return true
}
case <-timeout:
return false
}
}
}
func TestRouteSubscribe(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
ch := make(chan RouteUpdate)
done := make(chan struct{})
defer close(done)
if err := RouteSubscribe(ch, done); err != nil {
t.Fatal(err)
}
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 1, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_NEWROUTE, unix.NLM_F_EXCL|unix.NLM_F_CREATE, dst.IP) {
t.Fatal("Add update not received as expected")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_DELROUTE, 0, dst.IP) {
t.Fatal("Del update not received as expected")
}
}
func TestRouteSubscribeWithOptions(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
ch := make(chan RouteUpdate)
done := make(chan struct{})
defer close(done)
var lastError error
defer func() {
if lastError != nil {
t.Fatalf("Fatal error received during subscription: %v", lastError)
}
}()
if err := RouteSubscribeWithOptions(ch, done, RouteSubscribeOptions{
ErrorCallback: func(err error) {
lastError = err
},
}); err != nil {
t.Fatal(err)
}
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 1, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_NEWROUTE, unix.NLM_F_EXCL|unix.NLM_F_CREATE, dst.IP) {
t.Fatal("Add update not received as expected")
}
}
func TestRouteSubscribeAt(t *testing.T) {
skipUnlessRoot(t)
// Create an handle on a custom netns
newNs, err := netns.New()
if err != nil {
t.Fatal(err)
}
defer newNs.Close()
nh, err := NewHandleAt(newNs)
if err != nil {
t.Fatal(err)
}
defer nh.Close()
// Subscribe for Route events on the custom netns
ch := make(chan RouteUpdate)
done := make(chan struct{})
defer close(done)
if err := RouteSubscribeAt(newNs, ch, done); err != nil {
t.Fatal(err)
}
// get loopback interface
link, err := nh.LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = nh.LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 169, 0, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 100, 1, 1)
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := nh.RouteAdd(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_NEWROUTE, unix.NLM_F_EXCL|unix.NLM_F_CREATE, dst.IP) {
t.Fatal("Add update not received as expected")
}
if err := nh.RouteDel(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_DELROUTE, 0, dst.IP) {
t.Fatal("Del update not received as expected")
}
}
func TestRouteSubscribeListExisting(t *testing.T) {
skipUnlessRoot(t)
// Create an handle on a custom netns
newNs, err := netns.New()
if err != nil {
t.Fatal(err)
}
defer newNs.Close()
nh, err := NewHandleAt(newNs)
if err != nil {
t.Fatal(err)
}
defer nh.Close()
// get loopback interface
link, err := nh.LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = nh.LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route before subscribing
dst10 := &net.IPNet{
IP: net.IPv4(10, 10, 10, 0),
Mask: net.CIDRMask(24, 32),
}
ip := net.IPv4(127, 100, 1, 1)
route10 := Route{LinkIndex: link.Attrs().Index, Dst: dst10, Src: ip}
if err := nh.RouteAdd(&route10); err != nil {
t.Fatal(err)
}
// Subscribe for Route events including existing routes
ch := make(chan RouteUpdate)
done := make(chan struct{})
defer close(done)
if err := RouteSubscribeWithOptions(ch, done, RouteSubscribeOptions{
Namespace: &newNs,
ListExisting: true},
); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_NEWROUTE, 0, dst10.IP) {
t.Fatal("Existing add update not received as expected")
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 169, 0, 0),
Mask: net.CIDRMask(24, 32),
}
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, Src: ip}
if err := nh.RouteAdd(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_NEWROUTE, unix.NLM_F_EXCL|unix.NLM_F_CREATE, dst.IP) {
t.Fatal("Add update not received as expected")
}
if err := nh.RouteDel(&route); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_DELROUTE, 0, dst.IP) {
t.Fatal("Del update not received as expected")
}
if err := nh.RouteDel(&route10); err != nil {
t.Fatal(err)
}
if !expectRouteUpdate(ch, unix.RTM_DELROUTE, 0, dst10.IP) {
t.Fatal("Del update not received as expected")
}
}
func TestRouteFilterAllTables(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(1, 1, 1, 1),
Mask: net.CIDRMask(32, 32),
}
tables := []int{1000, 1001, 1002}
src := net.IPv4(127, 3, 3, 3)
for _, table := range tables {
route := Route{
LinkIndex: link.Attrs().Index,
Dst: dst,
Src: src,
Scope: unix.RT_SCOPE_LINK,
Priority: 13,
Table: table,
Type: unix.RTN_UNICAST,
Tos: 12,
Hoplimit: 100,
Realm: 328,
}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
}
routes, err := RouteListFiltered(FAMILY_V4, &Route{
Dst: dst,
Src: src,
Scope: unix.RT_SCOPE_LINK,
Table: unix.RT_TABLE_UNSPEC,
Type: unix.RTN_UNICAST,
Tos: 12,
Hoplimit: 100,
Realm: 328,
}, RT_FILTER_DST|RT_FILTER_SRC|RT_FILTER_SCOPE|RT_FILTER_TABLE|RT_FILTER_TYPE|RT_FILTER_TOS|RT_FILTER_HOPLIMIT|RT_FILTER_REALM)
if err != nil {
t.Fatal(err)
}
if len(routes) != 3 {
t.Fatal("Routes not added properly")
}
for _, route := range routes {
if route.Scope != unix.RT_SCOPE_LINK {
t.Fatal("Invalid Scope. Route not added properly")
}
if route.Priority != 13 {
t.Fatal("Invalid Priority. Route not added properly")
}
if !tableIDIn(tables, route.Table) {
t.Fatalf("Invalid Table %d. Route not added properly", route.Table)
}
if route.Type != unix.RTN_UNICAST {
t.Fatal("Invalid Type. Route not added properly")
}
if route.Tos != 12 {
t.Fatal("Invalid Tos. Route not added properly")
}
if route.Hoplimit != 100 {
t.Fatal("Invalid Hoplimit. Route not added properly")
}
if route.Realm != 328 {
t.Fatal("Invalid Realm. Route not added properly")
}
}
}
func TestRouteFilterByFamily(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
const table int = 999
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a IPv4 gateway route
dst4 := &net.IPNet{
IP: net.IPv4(2, 2, 0, 0),
Mask: net.CIDRMask(24, 32),
}
route4 := Route{LinkIndex: link.Attrs().Index, Dst: dst4, Table: table}
if err := RouteAdd(&route4); err != nil {
t.Fatal(err)
}
// add a IPv6 gateway route
dst6 := &net.IPNet{
IP: net.ParseIP("2001:db9::0"),
Mask: net.CIDRMask(64, 128),
}
route6 := Route{LinkIndex: link.Attrs().Index, Dst: dst6, Table: table}
if err := RouteAdd(&route6); err != nil {
t.Fatal(err)
}
// Get routes for both families
routes_all, err := RouteListFiltered(FAMILY_ALL, &Route{Table: table}, RT_FILTER_TABLE)
if err != nil {
t.Fatal(err)
}
if len(routes_all) != 2 {
t.Fatal("Filtering by FAMILY_ALL doesn't find two routes")
}
// Get IPv4 route
routes_v4, err := RouteListFiltered(FAMILY_V4, &Route{Table: table}, RT_FILTER_TABLE)
if err != nil {
t.Fatal(err)
}
if len(routes_v4) != 1 {
t.Fatal("Filtering by FAMILY_V4 doesn't find one route")
}
// Get IPv6 route
routes_v6, err := RouteListFiltered(FAMILY_V6, &Route{Table: table}, RT_FILTER_TABLE)
if err != nil {
t.Fatal(err)
}
if len(routes_v6) != 1 {
t.Fatal("Filtering by FAMILY_V6 doesn't find one route")
}
// Get non-existent routes
routes_non_existent, err := RouteListFiltered(99, &Route{Table: table}, RT_FILTER_TABLE)
if err != nil {
t.Fatal(err)
}
if len(routes_non_existent) != 0 {
t.Fatal("Filtering by non-existent family find some route")
}
}
func tableIDIn(ids []int, id int) bool {
for _, v := range ids {
if v == id {
return true
}
}
return false
}
func TestRouteExtraFields(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(1, 1, 1, 1),
Mask: net.CIDRMask(32, 32),
}
src := net.IPv4(127, 3, 3, 3)
route := Route{
LinkIndex: link.Attrs().Index,
Dst: dst,
Src: src,
Scope: unix.RT_SCOPE_LINK,
Priority: 13,
Table: unix.RT_TABLE_MAIN,
Type: unix.RTN_UNICAST,
Tos: 12,
Hoplimit: 100,
Realm: 239,
}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteListFiltered(FAMILY_V4, &Route{
Dst: dst,
Src: src,
Scope: unix.RT_SCOPE_LINK,
Table: unix.RT_TABLE_MAIN,
Type: unix.RTN_UNICAST,
Tos: 12,
Hoplimit: 100,
Realm: 239,
}, RT_FILTER_DST|RT_FILTER_SRC|RT_FILTER_SCOPE|RT_FILTER_TABLE|RT_FILTER_TYPE|RT_FILTER_TOS|RT_FILTER_HOPLIMIT|RT_FILTER_REALM)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
if routes[0].Scope != unix.RT_SCOPE_LINK {
t.Fatal("Invalid Scope. Route not added properly")
}
if routes[0].Priority != 13 {
t.Fatal("Invalid Priority. Route not added properly")
}
if routes[0].Table != unix.RT_TABLE_MAIN {
t.Fatal("Invalid Scope. Route not added properly")
}
if routes[0].Type != unix.RTN_UNICAST {
t.Fatal("Invalid Type. Route not added properly")
}
if routes[0].Tos != 12 {
t.Fatal("Invalid Tos. Route not added properly")
}
if routes[0].Hoplimit != 100 {
t.Fatal("Invalid Hoplimit. Route not added properly")
}
if routes[0].Realm != 239 {
t.Fatal("Invalid Realm. Route not added properly")
}
}
func TestRouteMultiPath(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
idx := link.Attrs().Index
route := Route{Dst: dst, MultiPath: []*NexthopInfo{{LinkIndex: idx}, {LinkIndex: idx}}}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("MultiPath Route not added properly")
}
if len(routes[0].MultiPath) != 2 {
t.Fatal("MultiPath Route not added properly")
}
}
func TestRouteIifOption(t *testing.T) {
skipUnlessRoot(t)
runtime.LockOSThread()
t.Cleanup(runtime.UnlockOSThread)
rootNs, err := netns.GetFromPid(1)
if err != nil {
t.Fatalf("could not get root ns: %s", err)
}
t.Cleanup(func() { rootNs.Close() })
rootHdl, err := NewHandleAt(rootNs)
if err != nil {
t.Fatalf("could not create handle for root ns: %s", err)
}
t.Cleanup(func() { rootHdl.Close() })
// setup a veth pair across two namespaces
// veth1 (2.2.2.3/24) <-> veth2 (2.2.2.4/24)
// peer ns for veth pair
ns, err := netns.New()
if err != nil {
t.Fatalf("could not create new ns: %s", err)
}
t.Cleanup(func() { ns.Close() })
l := &Veth{
LinkAttrs: LinkAttrs{Name: "veth1"},
PeerName: "veth2",
PeerNamespace: NsFd(ns),
}
if err = rootHdl.LinkAdd(l); err != nil {
t.Fatalf("could not add veth interface: %s", err)
}
t.Cleanup(func() { rootHdl.LinkDel(l) })
ve1, err := rootHdl.LinkByName("veth1")
if err != nil {
t.Fatalf("could not get link veth1: %s", err)
}
err = rootHdl.AddrAdd(ve1, &Addr{IPNet: &net.IPNet{IP: net.ParseIP("2.2.2.3"), Mask: net.CIDRMask(24, 32)}})
if err != nil {
t.Fatalf("could not set address for veth1: %s", err)
}
nh, err := NewHandleAt(ns)
if err != nil {
t.Fatalf("could not get handle for ns %+v: %s", ns, err)
}
t.Cleanup(func() { nh.Close() })
ve2, err := nh.LinkByName("veth2")
if err != nil {
t.Fatalf("could not get link veth2: %s", err)
}
err = nh.AddrAdd(ve2, &Addr{IPNet: &net.IPNet{IP: net.ParseIP("2.2.2.4"), Mask: net.CIDRMask(24, 32)}})
if err != nil {
t.Fatalf("could set address for veth2: %s", err)
}
if err = rootHdl.LinkSetUp(ve1); err != nil {
t.Fatalf("could not set veth1 up: %s", err)
}
if err = nh.LinkSetUp(ve2); err != nil {
t.Fatalf("could not set veth2 up: %s", err)
}
err = nh.RouteAdd(&Route{
Dst: &net.IPNet{
IP: net.IPv4zero,
Mask: net.CIDRMask(0, 32),
},
Gw: net.ParseIP("2.2.2.3"),
})
if err != nil {
t.Fatalf("could not add default route to ns: %s", err)
}
// setup finished, now do the actual test
_, err = rootHdl.RouteGetWithOptions(net.ParseIP("8.8.8.8"), &RouteGetOptions{
SrcAddr: net.ParseIP("2.2.2.4"),
})
if err == nil {
t.Fatal("route get should have resulted in error but did not")
}
testWithOptions := func(opts *RouteGetOptions) {
routes, err := rootHdl.RouteGetWithOptions(net.ParseIP("8.8.8.8"), opts)
if err != nil {
t.Fatalf("could not get route: %s", err)
}
if len(routes) != 1 {
t.Fatalf("did not get exactly one route, routes: %+v", routes)
}
// should be the default route
r, err := rootHdl.RouteGet(net.ParseIP("8.8.8.8"))
if err != nil {
t.Fatalf("could not get default route for 8.8.8.8: %s", err)
}
if len(r) != 1 {
t.Fatalf("did not get exactly one route, routes: %+v", routes)
}
if !routes[0].Gw.Equal(r[0].Gw) {
t.Fatalf("wrong gateway in route: expected: %s, got: %s", r[0].Gw, routes[0].Gw)
}
if routes[0].LinkIndex != r[0].LinkIndex {
t.Fatalf("wrong link in route: expected: %d, got: %d", r[0].LinkIndex, routes[0].LinkIndex)
}
}
t.Run("with iif", func(t *testing.T) {
testWithOptions(&RouteGetOptions{
SrcAddr: net.ParseIP("2.2.2.4"),
Iif: "veth1",
})
})
t.Run("with iifIndex", func(t *testing.T) {
testWithOptions(&RouteGetOptions{
SrcAddr: net.ParseIP("2.2.2.4"),
IifIndex: ve1.Attrs().Index,
})
})
t.Run("with iif and iifIndex", func(t *testing.T) {
testWithOptions(&RouteGetOptions{
SrcAddr: net.ParseIP("2.2.2.4"),
Iif: "veth1",
IifIndex: ve2.Attrs().Index, // Iif will supersede here
})
})
}
func TestRouteOifOption(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// setup two interfaces: eth0, eth1
err := LinkAdd(&Dummy{LinkAttrs{Name: "eth0"}})
if err != nil {
t.Fatal(err)
}
link1, err := LinkByName("eth0")
if err != nil {
t.Fatal(err)
}
if err = LinkSetUp(link1); err != nil {
t.Fatal(err)
}
if err = LinkAdd(&Dummy{LinkAttrs{Name: "eth1"}}); err != nil {
t.Fatal(err)
}
link2, err := LinkByName("eth1")
if err != nil {
t.Fatal(err)
}
if err = LinkSetUp(link2); err != nil {
t.Fatal(err)
}
// config ip addresses on interfaces
addr1 := &Addr{
IPNet: &net.IPNet{
IP: net.IPv4(192, 168, 1, 1),
Mask: net.CIDRMask(24, 32),
},
}
if err = AddrAdd(link1, addr1); err != nil {
t.Fatal(err)
}
addr2 := &Addr{
IPNet: &net.IPNet{
IP: net.IPv4(192, 168, 2, 1),
Mask: net.CIDRMask(24, 32),
},
}
if err = AddrAdd(link2, addr2); err != nil {
t.Fatal(err)
}
// add default multipath route
dst := &net.IPNet{
IP: net.IPv4(0, 0, 0, 0),
Mask: net.CIDRMask(0, 32),
}
gw1 := net.IPv4(192, 168, 1, 254)
gw2 := net.IPv4(192, 168, 2, 254)
route := Route{Dst: dst, MultiPath: []*NexthopInfo{{LinkIndex: link1.Attrs().Index,
Gw: gw1}, {LinkIndex: link2.Attrs().Index, Gw: gw2}}}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
// check getting route from specified Oif
dstIP := net.IPv4(10, 1, 1, 1)
routes, err := RouteGetWithOptions(dstIP, &RouteGetOptions{Oif: "eth0"})
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 || routes[0].LinkIndex != link1.Attrs().Index ||
!routes[0].Gw.Equal(gw1) {
t.Fatal("Get route from unmatched interface")
}
routes, err = RouteGetWithOptions(dstIP, &RouteGetOptions{Oif: "eth1"})
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 || routes[0].LinkIndex != link2.Attrs().Index ||
!routes[0].Gw.Equal(gw2) {
t.Fatal("Get route from unmatched interface")
}
}
func TestFilterDefaultRoute(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
address := &Addr{
IPNet: &net.IPNet{
IP: net.IPv4(127, 0, 0, 2),
Mask: net.CIDRMask(24, 32),
},
}
if err = AddrAdd(link, address); err != nil {
t.Fatal(err)
}
// Add default route
gw := net.IPv4(127, 0, 0, 2)
defaultRoute := Route{
Dst: nil,
Gw: gw,
}
if err := RouteAdd(&defaultRoute); err != nil {
t.Fatal(err)
}
// add an extra route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
extraRoute := Route{
Dst: dst,
Gw: gw,
}
if err := RouteAdd(&extraRoute); err != nil {
t.Fatal(err)
}
var filterTests = []struct {
filter *Route
mask uint64
expected net.IP
}{
{
&Route{Dst: nil},
RT_FILTER_DST,
gw,
},
{
&Route{Dst: dst},
RT_FILTER_DST,
gw,
},
}
for _, f := range filterTests {
routes, err := RouteListFiltered(FAMILY_V4, f.filter, f.mask)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not filtered properly")
}
if !routes[0].Gw.Equal(gw) {
t.Fatal("Unexpected Gateway")
}
}
}
func TestMPLSRouteAddDel(t *testing.T) {
tearDown := setUpMPLSNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
mplsDst := 100
route := Route{
LinkIndex: link.Attrs().Index,
MPLSDst: &mplsDst,
NewDst: &MPLSDestination{
Labels: []int{200, 300},
},
}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(link, FAMILY_MPLS)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_MPLS)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestIP6tnlRouteAddDel(t *testing.T) {
_, err := RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
_, dst, err := net.ParseCIDR("192.168.99.0/24")
if err != nil {
t.Fatalf("cannot parse destination prefix: %v", err)
}
encap := IP6tnlEncap{
Dst: net.ParseIP("2001:db8::"),
Src: net.ParseIP("::"),
}
route := &Route{
LinkIndex: link.Attrs().Index,
Dst: dst,
Encap: &encap,
}
if err := RouteAdd(route); err != nil {
t.Fatalf("Cannot add route: %v", err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
if err := RouteDel(route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestRouteEqual(t *testing.T) {
mplsDst := 100
seg6encap := &SEG6Encap{Mode: nl.SEG6_IPTUN_MODE_ENCAP}
seg6encap.Segments = []net.IP{net.ParseIP("fc00:a000::11")}
cases := []Route{
{
Dst: nil,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Gw: net.IPv4(1, 1, 1, 1),
},
{
ILinkIndex: 21,
LinkIndex: 20,
Dst: nil,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Protocol: 20,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Priority: 20,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Type: 20,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Table: 200,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Tos: 1,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Hoplimit: 1,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Realm: 29,
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 20,
Dst: nil,
Flags: int(FLAG_ONLINK),
Gw: net.IPv4(1, 1, 1, 1),
},
{
LinkIndex: 10,
Dst: &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
},
Src: net.IPv4(127, 1, 1, 1),
},
{
LinkIndex: 10,
Scope: unix.RT_SCOPE_LINK,
Dst: &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
},
Src: net.IPv4(127, 1, 1, 1),
},
{
LinkIndex: 3,
Dst: &net.IPNet{
IP: net.IPv4(1, 1, 1, 1),
Mask: net.CIDRMask(32, 32),
},
Src: net.IPv4(127, 3, 3, 3),
Scope: unix.RT_SCOPE_LINK,
Priority: 13,
Table: unix.RT_TABLE_MAIN,
Type: unix.RTN_UNICAST,
Tos: 12,
},
{
LinkIndex: 3,
Dst: &net.IPNet{
IP: net.IPv4(1, 1, 1, 1),
Mask: net.CIDRMask(32, 32),
},
Src: net.IPv4(127, 3, 3, 3),
Scope: unix.RT_SCOPE_LINK,
Priority: 13,
Table: unix.RT_TABLE_MAIN,
Type: unix.RTN_UNICAST,
Hoplimit: 100,
},
{
LinkIndex: 3,
Dst: &net.IPNet{
IP: net.IPv4(1, 1, 1, 1),
Mask: net.CIDRMask(32, 32),
},
Src: net.IPv4(127, 3, 3, 3),
Scope: unix.RT_SCOPE_LINK,
Priority: 13,
Table: unix.RT_TABLE_MAIN,
Type: unix.RTN_UNICAST,
Realm: 129,
},
{
LinkIndex: 10,
MPLSDst: &mplsDst,
NewDst: &MPLSDestination{
Labels: []int{200, 300},
},
},
{
Dst: nil,
Gw: net.IPv4(1, 1, 1, 1),
Encap: &MPLSEncap{
Labels: []int{100},
},
},
{
LinkIndex: 10,
Dst: &net.IPNet{
IP: net.IPv4(10, 0, 0, 102),
Mask: net.CIDRMask(32, 32),
},
Encap: seg6encap,
},
{
Dst: nil,
MultiPath: []*NexthopInfo{{LinkIndex: 10}, {LinkIndex: 20}},
},
{
Dst: nil,
MultiPath: []*NexthopInfo{{
LinkIndex: 10,
Gw: net.IPv4(1, 1, 1, 1),
}, {LinkIndex: 20}},
},
{
Dst: nil,
MultiPath: []*NexthopInfo{{
LinkIndex: 10,
Gw: net.IPv4(1, 1, 1, 1),
Encap: &MPLSEncap{
Labels: []int{100},
},
}, {LinkIndex: 20}},
},
{
Dst: nil,
MultiPath: []*NexthopInfo{{
LinkIndex: 10,
NewDst: &MPLSDestination{
Labels: []int{200, 300},
},
}, {LinkIndex: 20}},
},
{
Dst: nil,
MultiPath: []*NexthopInfo{{
LinkIndex: 10,
Encap: seg6encap,
}, {LinkIndex: 20}},
},
}
for i1 := range cases {
for i2 := range cases {
got := cases[i1].Equal(cases[i2])
expected := i1 == i2
if got != expected {
t.Errorf("Equal(%q,%q) == %s but expected %s",
cases[i1], cases[i2],
strconv.FormatBool(got),
strconv.FormatBool(expected))
}
}
}
}
func TestIPNetEqual(t *testing.T) {
cases := []string{
"1.1.1.1/24", "1.1.1.0/24", "1.1.1.1/32",
"0.0.0.0/0", "0.0.0.0/14",
"2001:db8::/32", "2001:db8::/128",
"2001:db8::caff/32", "2001:db8::caff/128",
"",
}
for _, c1 := range cases {
var n1 *net.IPNet
if c1 != "" {
var i1 net.IP
var err1 error
i1, n1, err1 = net.ParseCIDR(c1)
if err1 != nil {
panic(err1)
}
n1.IP = i1
}
for _, c2 := range cases {
var n2 *net.IPNet
if c2 != "" {
var i2 net.IP
var err2 error
i2, n2, err2 = net.ParseCIDR(c2)
if err2 != nil {
panic(err2)
}
n2.IP = i2
}
got := ipNetEqual(n1, n2)
expected := c1 == c2
if got != expected {
t.Errorf("IPNetEqual(%q,%q) == %s but expected %s",
c1, c2,
strconv.FormatBool(got),
strconv.FormatBool(expected))
}
}
}
}
func TestSEG6LocalEqual(t *testing.T) {
// Different attributes exists in different Actions. For example, Action
// SEG6_LOCAL_ACTION_END_X has In6Addr, SEG6_LOCAL_ACTION_END_T has Table etc.
segs := []net.IP{net.ParseIP("fc00:a000::11")}
// set flags for each actions.
var flags_end [nl.SEG6_LOCAL_MAX]bool
flags_end[nl.SEG6_LOCAL_ACTION] = true
var flags_end_x [nl.SEG6_LOCAL_MAX]bool
flags_end_x[nl.SEG6_LOCAL_ACTION] = true
flags_end_x[nl.SEG6_LOCAL_NH6] = true
var flags_end_t [nl.SEG6_LOCAL_MAX]bool
flags_end_t[nl.SEG6_LOCAL_ACTION] = true
flags_end_t[nl.SEG6_LOCAL_TABLE] = true
var flags_end_dx2 [nl.SEG6_LOCAL_MAX]bool
flags_end_dx2[nl.SEG6_LOCAL_ACTION] = true
flags_end_dx2[nl.SEG6_LOCAL_OIF] = true
var flags_end_dx6 [nl.SEG6_LOCAL_MAX]bool
flags_end_dx6[nl.SEG6_LOCAL_ACTION] = true
flags_end_dx6[nl.SEG6_LOCAL_NH6] = true
var flags_end_dx4 [nl.SEG6_LOCAL_MAX]bool
flags_end_dx4[nl.SEG6_LOCAL_ACTION] = true
flags_end_dx4[nl.SEG6_LOCAL_NH4] = true
var flags_end_dt6 [nl.SEG6_LOCAL_MAX]bool
flags_end_dt6[nl.SEG6_LOCAL_ACTION] = true
flags_end_dt6[nl.SEG6_LOCAL_TABLE] = true
var flags_end_dt4 [nl.SEG6_LOCAL_MAX]bool
flags_end_dt4[nl.SEG6_LOCAL_ACTION] = true
flags_end_dt4[nl.SEG6_LOCAL_TABLE] = true
var flags_end_b6 [nl.SEG6_LOCAL_MAX]bool
flags_end_b6[nl.SEG6_LOCAL_ACTION] = true
flags_end_b6[nl.SEG6_LOCAL_SRH] = true
var flags_end_b6_encaps [nl.SEG6_LOCAL_MAX]bool
flags_end_b6_encaps[nl.SEG6_LOCAL_ACTION] = true
flags_end_b6_encaps[nl.SEG6_LOCAL_SRH] = true
var flags_end_bpf [nl.SEG6_LOCAL_MAX]bool
flags_end_bpf[nl.SEG6_LOCAL_ACTION] = true
flags_end_bpf[nl.SEG6_LOCAL_BPF] = true
cases := []SEG6LocalEncap{
{
Flags: flags_end,
Action: nl.SEG6_LOCAL_ACTION_END,
},
{
Flags: flags_end_x,
Action: nl.SEG6_LOCAL_ACTION_END_X,
In6Addr: net.ParseIP("2001:db8::1"),
},
{
Flags: flags_end_t,
Action: nl.SEG6_LOCAL_ACTION_END_T,
Table: 10,
},
{
Flags: flags_end_dx2,
Action: nl.SEG6_LOCAL_ACTION_END_DX2,
Oif: 20,
},
{
Flags: flags_end_dx6,
Action: nl.SEG6_LOCAL_ACTION_END_DX6,
In6Addr: net.ParseIP("2001:db8::1"),
},
{
Flags: flags_end_dx4,
Action: nl.SEG6_LOCAL_ACTION_END_DX4,
InAddr: net.IPv4(192, 168, 10, 10),
},
{
Flags: flags_end_dt6,
Action: nl.SEG6_LOCAL_ACTION_END_DT6,
Table: 30,
},
{
Flags: flags_end_dt4,
Action: nl.SEG6_LOCAL_ACTION_END_DT4,
Table: 40,
},
{
Flags: flags_end_b6,
Action: nl.SEG6_LOCAL_ACTION_END_B6,
Segments: segs,
},
{
Flags: flags_end_b6_encaps,
Action: nl.SEG6_LOCAL_ACTION_END_B6_ENCAPS,
Segments: segs,
},
}
// SEG6_LOCAL_ACTION_END_BPF
endBpf := SEG6LocalEncap{
Flags: flags_end_bpf,
Action: nl.SEG6_LOCAL_ACTION_END_BPF,
}
_ = endBpf.SetProg(1, "firewall")
cases = append(cases, endBpf)
for i1 := range cases {
for i2 := range cases {
got := cases[i1].Equal(&cases[i2])
expected := i1 == i2
if got != expected {
t.Errorf("Equal(%v,%v) == %s but expected %s",
cases[i1], cases[i2],
strconv.FormatBool(got),
strconv.FormatBool(expected))
}
}
}
}
func TestSEG6RouteAddDel(t *testing.T) {
if os.Getenv("CI") == "true" {
t.Skipf("Fails in CI with: route_test.go:*: Invalid Type. SEG6_IPTUN_MODE_INLINE routes not added properly")
}
// add/del routes with LWTUNNEL_SEG6 to/from loopback interface.
// Test both seg6 modes: encap (IPv4) & inline (IPv6).
tearDown := setUpSEG6NetlinkTest(t)
defer tearDown()
// get loopback interface and bring it up
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
dst1 := &net.IPNet{ // INLINE mode must be IPv6 route
IP: net.ParseIP("2001:db8::1"),
Mask: net.CIDRMask(128, 128),
}
dst2 := &net.IPNet{
IP: net.IPv4(10, 0, 0, 102),
Mask: net.CIDRMask(32, 32),
}
var s1, s2 []net.IP
s1 = append(s1, net.ParseIP("::")) // inline requires "::"
s1 = append(s1, net.ParseIP("fc00:a000::12"))
s1 = append(s1, net.ParseIP("fc00:a000::11"))
s2 = append(s2, net.ParseIP("fc00:a000::22"))
s2 = append(s2, net.ParseIP("fc00:a000::21"))
e1 := &SEG6Encap{Mode: nl.SEG6_IPTUN_MODE_INLINE}
e2 := &SEG6Encap{Mode: nl.SEG6_IPTUN_MODE_ENCAP}
e1.Segments = s1
e2.Segments = s2
route1 := Route{LinkIndex: link.Attrs().Index, Dst: dst1, Encap: e1}
route2 := Route{LinkIndex: link.Attrs().Index, Dst: dst2, Encap: e2}
// Add SEG6 routes
if err := RouteAdd(&route1); err != nil {
t.Fatal(err)
}
if err := RouteAdd(&route2); err != nil {
t.Fatal(err)
}
// SEG6_IPTUN_MODE_INLINE
routes, err := RouteList(link, FAMILY_V6)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("SEG6 routes not added properly")
}
for _, route := range routes {
if route.Encap == nil || route.Encap.Type() != nl.LWTUNNEL_ENCAP_SEG6 {
t.Fatal("Invalid Type. SEG6_IPTUN_MODE_INLINE routes not added properly")
}
}
// SEG6_IPTUN_MODE_ENCAP
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("SEG6 routes not added properly")
}
for _, route := range routes {
if route.Encap.Type() != nl.LWTUNNEL_ENCAP_SEG6 {
t.Fatal("Invalid Type. SEG6_IPTUN_MODE_ENCAP routes not added properly")
}
}
// Del (remove) SEG6 routes
if err := RouteDel(&route1); err != nil {
t.Fatal(err)
}
if err := RouteDel(&route2); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("SEG6 routes not removed properly")
}
}
// add/del routes with LWTUNNEL_ENCAP_SEG6_LOCAL to/from dummy interface.
func TestSEG6LocalRoute6AddDel(t *testing.T) {
minKernelRequired(t, 4, 14)
tearDown := setUpSEG6NetlinkTest(t)
defer tearDown()
// create dummy interface
// IPv6 route added to loopback interface will be unreachable
la := NewLinkAttrs()
la.Name = "dummy_route6"
la.TxQLen = 1500
dummy := &Dummy{LinkAttrs: la}
if err := LinkAdd(dummy); err != nil {
t.Fatal(err)
}
// get dummy interface and bring it up
link, err := LinkByName("dummy_route6")
if err != nil {
t.Fatal(err)
}
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
dst1 := &net.IPNet{
IP: net.ParseIP("2001:db8::1"),
Mask: net.CIDRMask(128, 128),
}
// Create Route including Action SEG6_LOCAL_ACTION_END_B6.
// Could be any Action but thought better to have seg list.
var s1 []net.IP
s1 = append(s1, net.ParseIP("fc00:a000::12"))
s1 = append(s1, net.ParseIP("fc00:a000::11"))
var flags_end_b6_encaps [nl.SEG6_LOCAL_MAX]bool
flags_end_b6_encaps[nl.SEG6_LOCAL_ACTION] = true
flags_end_b6_encaps[nl.SEG6_LOCAL_SRH] = true
e1 := &SEG6LocalEncap{
Flags: flags_end_b6_encaps,
Action: nl.SEG6_LOCAL_ACTION_END_B6,
Segments: s1,
}
route1 := Route{LinkIndex: link.Attrs().Index, Dst: dst1, Encap: e1}
// Add SEG6Local routes
if err := RouteAdd(&route1); err != nil {
t.Fatal(err)
}
// typically one route (fe80::/64) will be created when dummy_route6 is created.
// Thus you cannot use RouteList() to find the route entry just added.
// Lookup route and confirm it's SEG6Local route just added.
routesFound, err := RouteGet(dst1.IP)
if err != nil {
t.Fatal(err)
}
if len(routesFound) != 1 { // should only find 1 route entry
t.Fatal("SEG6Local route not added correctly")
}
if !e1.Equal(routesFound[0].Encap) {
t.Fatal("Encap does not match the original SEG6LocalEncap")
}
// Del SEG6Local routes
if err := RouteDel(&route1); err != nil {
t.Fatal(err)
}
// Confirm route is deleted.
if _, err = RouteGet(dst1.IP); err == nil {
t.Fatal("SEG6Local route still exists.")
}
// cleanup dummy interface created for the test
if err := LinkDel(link); err != nil {
t.Fatal(err)
}
}
func TestBpfEncap(t *testing.T) {
tCase := &BpfEncap{}
if err := tCase.SetProg(nl.LWT_BPF_IN, 0, "test_in"); err == nil {
t.Fatal("BpfEncap: inserting invalid FD did not return error")
}
if err := tCase.SetProg(nl.LWT_BPF_XMIT_HEADROOM, 23, "test_nout"); err == nil {
t.Fatal("BpfEncap: inserting invalid mode did not return error")
}
if err := tCase.SetProg(nl.LWT_BPF_XMIT, 12, "test_xmit"); err != nil {
t.Fatal("BpfEncap: inserting valid program option returned error")
}
if err := tCase.SetXmitHeadroom(12); err != nil {
t.Fatal("BpfEncap: inserting valid headroom returned error")
}
if err := tCase.SetXmitHeadroom(nl.LWT_BPF_MAX_HEADROOM + 1); err == nil {
t.Fatal("BpfEncap: inserting invalid headroom did not return error")
}
tCase = &BpfEncap{}
expected := &BpfEncap{
progs: [nl.LWT_BPF_MAX]bpfObj{
1: {
progName: "test_in[fd:10]",
progFd: 10,
},
2: {
progName: "test_out[fd:11]",
progFd: 11,
},
3: {
progName: "test_xmit[fd:21]",
progFd: 21,
},
},
headroom: 128,
}
_ = tCase.SetProg(1, 10, "test_in")
_ = tCase.SetProg(2, 11, "test_out")
_ = tCase.SetProg(3, 21, "test_xmit")
_ = tCase.SetXmitHeadroom(128)
if !tCase.Equal(expected) {
t.Fatal("BpfEncap: equal comparison failed")
}
_ = tCase.SetProg(3, 21, "test2_xmit")
if tCase.Equal(expected) {
t.Fatal("BpfEncap: equal comparison succeeded when attributes differ")
}
}
func TestMTURouteAddDel(t *testing.T) {
_, err := RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
tearDown := setUpNetlinkTest(t)
defer tearDown()
// get loopback interface
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
// bring the interface up
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
// add a gateway route
dst := &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
}
route := Route{LinkIndex: link.Attrs().Index, Dst: dst, MTU: 500}
if err := RouteAdd(&route); err != nil {
t.Fatal(err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
if route.MTU != routes[0].MTU {
t.Fatal("Route mtu not set properly")
}
if err := RouteDel(&route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestRouteViaAddDel(t *testing.T) {
minKernelRequired(t, 5, 4)
tearDown := setUpNetlinkTest(t)
defer tearDown()
_, err := RouteList(nil, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
link, err := LinkByName("lo")
if err != nil {
t.Fatal(err)
}
if err := LinkSetUp(link); err != nil {
t.Fatal(err)
}
route := &Route{
LinkIndex: link.Attrs().Index,
Dst: &net.IPNet{
IP: net.IPv4(192, 168, 0, 0),
Mask: net.CIDRMask(24, 32),
},
MultiPath: []*NexthopInfo{
{
LinkIndex: link.Attrs().Index,
Via: &Via{
AddrFamily: FAMILY_V6,
Addr: net.ParseIP("2001::1"),
},
},
},
}
if err := RouteAdd(route); err != nil {
t.Fatalf("route: %v, err: %v", route, err)
}
routes, err := RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatal("Route not added properly")
}
got := routes[0].Via
want := route.MultiPath[0].Via
if !want.Equal(got) {
t.Fatalf("Route Via attribute does not match; got: %s, want: %s", got, want)
}
if err := RouteDel(route); err != nil {
t.Fatal(err)
}
routes, err = RouteList(link, FAMILY_V4)
if err != nil {
t.Fatal(err)
}
if len(routes) != 0 {
t.Fatal("Route not removed properly")
}
}
func TestRouteUIDOption(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// setup eth0 so that network is reachable
err := LinkAdd(&Dummy{LinkAttrs{Name: "eth0"}})
if err != nil {
t.Fatal(err)
}
link, err := LinkByName("eth0")
if err != nil {
t.Fatal(err)
}
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
addr := &Addr{
IPNet: &net.IPNet{
IP: net.IPv4(192, 168, 1, 1),
Mask: net.CIDRMask(16, 32),
},
}
if err = AddrAdd(link, addr); err != nil {
t.Fatal(err)
}
// a table different than unix.RT_TABLE_MAIN
testtable := 1000
gw1 := net.IPv4(192, 168, 1, 254)
gw2 := net.IPv4(192, 168, 2, 254)
// add default route via gw1 (in main route table by default)
defaultRouteMain := Route{
Dst: nil,
Gw: gw1,
}
if err := RouteAdd(&defaultRouteMain); err != nil {
t.Fatal(err)
}
// add default route via gw2 in test route table
defaultRouteTest := Route{
Dst: nil,
Gw: gw2,
Table: testtable,
}
if err := RouteAdd(&defaultRouteTest); err != nil {
t.Fatal(err)
}
// check the routes are in different tables
routes, err := RouteListFiltered(FAMILY_V4, &Route{
Dst: nil,
Table: unix.RT_TABLE_UNSPEC,
}, RT_FILTER_DST|RT_FILTER_TABLE)
if err != nil {
t.Fatal(err)
}
if len(routes) != 2 || routes[0].Table == routes[1].Table {
t.Fatal("Routes not added properly")
}
// add a rule that uidrange match should result in route lookup of test table for uid other than current
// current uid is 0 due to skipUnlessRoot()
var uid uint32 = 1000
rule := NewRule()
rule.UIDRange = NewRuleUIDRange(uid, uid)
rule.Table = testtable
if err := RuleAdd(rule); err != nil {
t.Fatal(err)
}
dstIP := net.IPv4(10, 1, 1, 1)
// check getting route without UID option
routes, err = RouteGetWithOptions(dstIP, &RouteGetOptions{UID: nil})
if err != nil {
t.Fatal(err)
}
// current uid is outside uidrange; rule does not apply; lookup main table
if len(routes) != 1 || !routes[0].Gw.Equal(gw1) {
t.Fatal(routes)
}
// check getting route with UID option
routes, err = RouteGetWithOptions(dstIP, &RouteGetOptions{UID: &uid})
if err != nil {
t.Fatal(err)
}
// option uid is within uidrange; rule applies; lookup test table
if len(routes) != 1 || !routes[0].Gw.Equal(gw2) {
t.Fatal(routes)
}
}
func TestRouteFWMarkOption(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
// setup eth0 so that network is reachable
err := LinkAdd(&Dummy{LinkAttrs{Name: "eth0"}})
if err != nil {
t.Fatal(err)
}
link, err := LinkByName("eth0")
if err != nil {
t.Fatal(err)
}
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
addr := &Addr{
IPNet: &net.IPNet{
IP: net.IPv4(192, 168, 1, 1),
Mask: net.CIDRMask(16, 32),
},
}
if err = AddrAdd(link, addr); err != nil {
t.Fatal(err)
}
// a table different than unix.RT_TABLE_MAIN
testtable := 1000
gw1 := net.IPv4(192, 168, 1, 254)
gw2 := net.IPv4(192, 168, 2, 254)
// add default route via gw1 (in main route table by default)
defaultRouteMain := Route{
Dst: nil,
Gw: gw1,
}
if err := RouteAdd(&defaultRouteMain); err != nil {
t.Fatal(err)
}
// add default route via gw2 in test route table
defaultRouteTest := Route{
Dst: nil,
Gw: gw2,
Table: testtable,
}
if err := RouteAdd(&defaultRouteTest); err != nil {
t.Fatal(err)
}
// check the routes are in different tables
routes, err := RouteListFiltered(FAMILY_V4, &Route{
Dst: nil,
Table: unix.RT_TABLE_UNSPEC,
}, RT_FILTER_DST|RT_FILTER_TABLE)
if err != nil {
t.Fatal(err)
}
if len(routes) != 2 || routes[0].Table == routes[1].Table {
t.Fatal("Routes not added properly")
}
// add a rule that fwmark match should result in route lookup of test table
fwmark := 1000
rule := NewRule()
rule.Mark = fwmark
rule.Mask = 0xFFFFFFFF
rule.Table = testtable
if err := RuleAdd(rule); err != nil {
t.Fatal(err)
}
dstIP := net.IPv4(10, 1, 1, 1)
// check getting route without FWMark option
routes, err = RouteGetWithOptions(dstIP, &RouteGetOptions{})
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 || !routes[0].Gw.Equal(gw1) {
t.Fatal(routes)
}
// check getting route with FWMark option
routes, err = RouteGetWithOptions(dstIP, &RouteGetOptions{Mark: fwmark})
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 || !routes[0].Gw.Equal(gw2) {
t.Fatal(routes)
}
}
func TestRouteGetFIBMatchOption(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
err := LinkAdd(&Dummy{LinkAttrs{Name: "eth0"}})
if err != nil {
t.Fatal(err)
}
link, err := LinkByName("eth0")
if err != nil {
t.Fatal(err)
}
if err = LinkSetUp(link); err != nil {
t.Fatal(err)
}
addr := &Addr{
IPNet: &net.IPNet{
IP: net.IPv4(192, 168, 0, 2),
Mask: net.CIDRMask(24, 32),
},
}
if err = AddrAdd(link, addr); err != nil {
t.Fatal(err)
}
route := &Route{
LinkIndex: link.Attrs().Index,
Gw: net.IPv4(192, 168, 1, 1),
Dst: &net.IPNet{
IP: net.IPv4(192, 168, 2, 0),
Mask: net.CIDRMask(24, 32),
},
Flags: int(FLAG_ONLINK),
}
err = RouteAdd(route)
if err != nil {
t.Fatal(err)
}
routes, err := RouteGetWithOptions(net.IPv4(192, 168, 2, 1), &RouteGetOptions{FIBMatch: true})
if err != nil {
t.Fatal(err)
}
if len(routes) != 1 {
t.Fatalf("More than one route matched %v", routes)
}
if len(routes[0].ListFlags()) != 1 {
t.Fatalf("More than one route flag returned %v", routes[0].ListFlags())
}
flag := routes[0].ListFlags()[0]
if flag != "onlink" {
t.Fatalf("Unexpected flag %s returned", flag)
}
}
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