diff options
Diffstat (limited to 'pkg/tcpip/stack')
-rw-r--r-- | pkg/tcpip/stack/ndp_test.go | 118 |
1 files changed, 104 insertions, 14 deletions
diff --git a/pkg/tcpip/stack/ndp_test.go b/pkg/tcpip/stack/ndp_test.go index b6cf24739..a1132624f 100644 --- a/pkg/tcpip/stack/ndp_test.go +++ b/pkg/tcpip/stack/ndp_test.go @@ -4629,8 +4629,110 @@ func TestNDPDNSSearchListDispatch(t *testing.T) { } } -// TestCleanupNDPState tests that all discovered routers and prefixes, and -// auto-generated addresses are invalidated when a NIC becomes a router. +func TestNoCleanupNDPStateWhenForwardingEnabled(t *testing.T) { + const ( + lifetimeSeconds = 999 + nicID = 1 + ) + + ndpDisp := ndpDispatcher{ + routerC: make(chan ndpRouterEvent, 1), + rememberRouter: true, + prefixC: make(chan ndpPrefixEvent, 1), + rememberPrefix: true, + autoGenAddrC: make(chan ndpAutoGenAddrEvent, 1), + } + s := stack.New(stack.Options{ + NetworkProtocols: []stack.NetworkProtocolFactory{ipv6.NewProtocolWithOptions(ipv6.Options{ + AutoGenLinkLocal: true, + NDPConfigs: ipv6.NDPConfigurations{ + HandleRAs: true, + DiscoverDefaultRouters: true, + DiscoverOnLinkPrefixes: true, + AutoGenGlobalAddresses: true, + }, + NDPDisp: &ndpDisp, + })}, + }) + + e1 := channel.New(0, header.IPv6MinimumMTU, linkAddr1) + if err := s.CreateNIC(nicID, e1); err != nil { + t.Fatalf("CreateNIC(%d, _) = %s", nicID, err) + } + llAddr := tcpip.AddressWithPrefix{Address: llAddr1, PrefixLen: header.IPv6LinkLocalPrefix.PrefixLen} + select { + case e := <-ndpDisp.autoGenAddrC: + if diff := checkAutoGenAddrEvent(e, llAddr, newAddr); diff != "" { + t.Errorf("auto-gen addr mismatch (-want +got):\n%s", diff) + } + default: + t.Errorf("expected auto-gen addr event for %s on NIC(%d)", llAddr, nicID) + } + + prefix, subnet, addr := prefixSubnetAddr(0, linkAddr1) + e1.InjectInbound( + header.IPv6ProtocolNumber, + raBufWithPI( + llAddr3, + lifetimeSeconds, + prefix, + true, /* onLink */ + true, /* auto */ + lifetimeSeconds, + lifetimeSeconds, + ), + ) + select { + case e := <-ndpDisp.routerC: + if diff := checkRouterEvent(e, llAddr3, true /* discovered */); diff != "" { + t.Errorf("router event mismatch (-want +got):\n%s", diff) + } + default: + t.Errorf("expected router event for %s on NIC(%d)", llAddr3, nicID) + } + select { + case e := <-ndpDisp.prefixC: + if diff := checkPrefixEvent(e, subnet, true /* discovered */); diff != "" { + t.Errorf("router event mismatch (-want +got):\n%s", diff) + } + default: + t.Errorf("expected prefix event for %s on NIC(%d)", prefix, nicID) + } + select { + case e := <-ndpDisp.autoGenAddrC: + if diff := checkAutoGenAddrEvent(e, addr, newAddr); diff != "" { + t.Errorf("auto-gen addr mismatch (-want +got):\n%s", diff) + } + default: + t.Errorf("expected auto-gen addr event for %s on NIC(%d)", addr, nicID) + } + + // Enabling or disabling forwarding should not invalidate discovered prefixes + // or routers, or auto-generated address. + for _, forwarding := range [...]bool{true, false} { + t.Run(fmt.Sprintf("Transition forwarding to %t", forwarding), func(t *testing.T) { + if err := s.SetForwarding(ipv6.ProtocolNumber, forwarding); err != nil { + t.Fatalf("SetForwarding(%d, %t): %s", ipv6.ProtocolNumber, forwarding, err) + } + select { + case e := <-ndpDisp.routerC: + t.Errorf("unexpected router event = %#v", e) + default: + } + select { + case e := <-ndpDisp.prefixC: + t.Errorf("unexpected prefix event = %#v", e) + default: + } + select { + case e := <-ndpDisp.autoGenAddrC: + t.Errorf("unexpected auto-gen addr event = %#v", e) + default: + } + }) + } +} + func TestCleanupNDPState(t *testing.T) { const ( lifetimeSeconds = 5 @@ -4659,18 +4761,6 @@ func TestCleanupNDPState(t *testing.T) { maxAutoGenAddrEvents int skipFinalAddrCheck bool }{ - // A NIC should still keep its auto-generated link-local address when - // becoming a router. - { - name: "Enable forwarding", - cleanupFn: func(t *testing.T, s *stack.Stack) { - t.Helper() - s.SetForwarding(ipv6.ProtocolNumber, true) - }, - keepAutoGenLinkLocal: true, - maxAutoGenAddrEvents: 4, - }, - // A NIC should cleanup all NDP state when it is disabled. { name: "Disable NIC", |