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-rw-r--r--pkg/tcpip/tests/integration/BUILD5
-rw-r--r--pkg/tcpip/tests/integration/forward_test.go256
-rw-r--r--pkg/tcpip/tests/integration/iptables_test.go296
-rw-r--r--pkg/tcpip/tests/integration/link_resolution_test.go244
-rw-r--r--pkg/tcpip/tests/integration/loopback_test.go8
5 files changed, 768 insertions, 41 deletions
diff --git a/pkg/tcpip/tests/integration/BUILD b/pkg/tcpip/tests/integration/BUILD
index d4f7bb5ff..8802f36b2 100644
--- a/pkg/tcpip/tests/integration/BUILD
+++ b/pkg/tcpip/tests/integration/BUILD
@@ -31,12 +31,14 @@ go_test(
deps = [
"//pkg/tcpip",
"//pkg/tcpip/buffer",
+ "//pkg/tcpip/checker",
"//pkg/tcpip/header",
"//pkg/tcpip/link/channel",
"//pkg/tcpip/network/ipv4",
"//pkg/tcpip/network/ipv6",
"//pkg/tcpip/stack",
"//pkg/tcpip/tests/utils",
+ "//pkg/tcpip/testutil",
"//pkg/tcpip/transport/udp",
],
)
@@ -46,17 +48,20 @@ go_test(
size = "small",
srcs = ["link_resolution_test.go"],
deps = [
+ "//pkg/context",
"//pkg/tcpip",
"//pkg/tcpip/buffer",
"//pkg/tcpip/checker",
"//pkg/tcpip/faketime",
"//pkg/tcpip/header",
+ "//pkg/tcpip/link/channel",
"//pkg/tcpip/link/pipe",
"//pkg/tcpip/network/arp",
"//pkg/tcpip/network/ipv4",
"//pkg/tcpip/network/ipv6",
"//pkg/tcpip/stack",
"//pkg/tcpip/tests/utils",
+ "//pkg/tcpip/testutil",
"//pkg/tcpip/transport/icmp",
"//pkg/tcpip/transport/tcp",
"//pkg/tcpip/transport/udp",
diff --git a/pkg/tcpip/tests/integration/forward_test.go b/pkg/tcpip/tests/integration/forward_test.go
index dbd279c94..92fa6257d 100644
--- a/pkg/tcpip/tests/integration/forward_test.go
+++ b/pkg/tcpip/tests/integration/forward_test.go
@@ -16,6 +16,7 @@ package forward_test
import (
"bytes"
+ "fmt"
"testing"
"github.com/google/go-cmp/cmp"
@@ -34,6 +35,39 @@ import (
"gvisor.dev/gvisor/pkg/waiter"
)
+const ttl = 64
+
+var (
+ ipv4GlobalMulticastAddr = testutil.MustParse4("224.0.1.10")
+ ipv6GlobalMulticastAddr = testutil.MustParse6("ff0e::a")
+)
+
+func rxICMPv4EchoRequest(e *channel.Endpoint, src, dst tcpip.Address) {
+ utils.RxICMPv4EchoRequest(e, src, dst, ttl)
+}
+
+func rxICMPv6EchoRequest(e *channel.Endpoint, src, dst tcpip.Address) {
+ utils.RxICMPv6EchoRequest(e, src, dst, ttl)
+}
+
+func forwardedICMPv4EchoRequestChecker(t *testing.T, b []byte, src, dst tcpip.Address) {
+ checker.IPv4(t, b,
+ checker.SrcAddr(src),
+ checker.DstAddr(dst),
+ checker.TTL(ttl-1),
+ checker.ICMPv4(
+ checker.ICMPv4Type(header.ICMPv4Echo)))
+}
+
+func forwardedICMPv6EchoRequestChecker(t *testing.T, b []byte, src, dst tcpip.Address) {
+ checker.IPv6(t, b,
+ checker.SrcAddr(src),
+ checker.DstAddr(dst),
+ checker.TTL(ttl-1),
+ checker.ICMPv6(
+ checker.ICMPv6Type(header.ICMPv6EchoRequest)))
+}
+
func TestForwarding(t *testing.T) {
const listenPort = 8080
@@ -320,45 +354,16 @@ func TestMulticastForwarding(t *testing.T) {
const (
nicID1 = 1
nicID2 = 2
- ttl = 64
)
var (
ipv4LinkLocalUnicastAddr = testutil.MustParse4("169.254.0.10")
ipv4LinkLocalMulticastAddr = testutil.MustParse4("224.0.0.10")
- ipv4GlobalMulticastAddr = testutil.MustParse4("224.0.1.10")
ipv6LinkLocalUnicastAddr = testutil.MustParse6("fe80::a")
ipv6LinkLocalMulticastAddr = testutil.MustParse6("ff02::a")
- ipv6GlobalMulticastAddr = testutil.MustParse6("ff0e::a")
)
- rxICMPv4EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) {
- utils.RxICMPv4EchoRequest(e, src, dst, ttl)
- }
-
- rxICMPv6EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) {
- utils.RxICMPv6EchoRequest(e, src, dst, ttl)
- }
-
- v4Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) {
- checker.IPv4(t, b,
- checker.SrcAddr(src),
- checker.DstAddr(dst),
- checker.TTL(ttl-1),
- checker.ICMPv4(
- checker.ICMPv4Type(header.ICMPv4Echo)))
- }
-
- v6Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) {
- checker.IPv6(t, b,
- checker.SrcAddr(src),
- checker.DstAddr(dst),
- checker.TTL(ttl-1),
- checker.ICMPv6(
- checker.ICMPv6Type(header.ICMPv6EchoRequest)))
- }
-
tests := []struct {
name string
srcAddr, dstAddr tcpip.Address
@@ -394,7 +399,7 @@ func TestMulticastForwarding(t *testing.T) {
rx: rxICMPv4EchoRequest,
expectForward: true,
checker: func(t *testing.T, b []byte) {
- v4Checker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address)
+ forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address)
},
},
{
@@ -404,7 +409,7 @@ func TestMulticastForwarding(t *testing.T) {
rx: rxICMPv4EchoRequest,
expectForward: true,
checker: func(t *testing.T, b []byte) {
- v4Checker(t, b, utils.RemoteIPv4Addr, ipv4GlobalMulticastAddr)
+ forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, ipv4GlobalMulticastAddr)
},
},
@@ -436,7 +441,7 @@ func TestMulticastForwarding(t *testing.T) {
rx: rxICMPv6EchoRequest,
expectForward: true,
checker: func(t *testing.T, b []byte) {
- v6Checker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address)
+ forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address)
},
},
{
@@ -446,7 +451,7 @@ func TestMulticastForwarding(t *testing.T) {
rx: rxICMPv6EchoRequest,
expectForward: true,
checker: func(t *testing.T, b []byte) {
- v6Checker(t, b, utils.RemoteIPv6Addr, ipv6GlobalMulticastAddr)
+ forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, ipv6GlobalMulticastAddr)
},
},
}
@@ -475,11 +480,11 @@ func TestMulticastForwarding(t *testing.T) {
t.Fatalf("s.AddAddress(%d, %d, %s): %s", nicID2, ipv6.ProtocolNumber, utils.Ipv6Addr.Address, err)
}
- if err := s.SetForwarding(ipv4.ProtocolNumber, true); err != nil {
- t.Fatalf("s.SetForwarding(%d, true): %s", ipv4.ProtocolNumber, err)
+ if err := s.SetForwardingDefaultAndAllNICs(ipv4.ProtocolNumber, true); err != nil {
+ t.Fatalf("s.SetForwardingDefaultAndAllNICs(%d, true): %s", ipv4.ProtocolNumber, err)
}
- if err := s.SetForwarding(ipv6.ProtocolNumber, true); err != nil {
- t.Fatalf("s.SetForwarding(%d, true): %s", ipv6.ProtocolNumber, err)
+ if err := s.SetForwardingDefaultAndAllNICs(ipv6.ProtocolNumber, true); err != nil {
+ t.Fatalf("s.SetForwardingDefaultAndAllNICs(%d, true): %s", ipv6.ProtocolNumber, err)
}
s.SetRouteTable([]tcpip.Route{
@@ -506,3 +511,180 @@ func TestMulticastForwarding(t *testing.T) {
})
}
}
+
+func TestPerInterfaceForwarding(t *testing.T) {
+ const (
+ nicID1 = 1
+ nicID2 = 2
+ )
+
+ tests := []struct {
+ name string
+ srcAddr, dstAddr tcpip.Address
+ rx func(*channel.Endpoint, tcpip.Address, tcpip.Address)
+ checker func(*testing.T, []byte)
+ }{
+ {
+ name: "IPv4 unicast",
+ srcAddr: utils.RemoteIPv4Addr,
+ dstAddr: utils.Ipv4Addr2.AddressWithPrefix.Address,
+ rx: rxICMPv4EchoRequest,
+ checker: func(t *testing.T, b []byte) {
+ forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address)
+ },
+ },
+ {
+ name: "IPv4 multicast",
+ srcAddr: utils.RemoteIPv4Addr,
+ dstAddr: ipv4GlobalMulticastAddr,
+ rx: rxICMPv4EchoRequest,
+ checker: func(t *testing.T, b []byte) {
+ forwardedICMPv4EchoRequestChecker(t, b, utils.RemoteIPv4Addr, ipv4GlobalMulticastAddr)
+ },
+ },
+
+ {
+ name: "IPv6 unicast",
+ srcAddr: utils.RemoteIPv6Addr,
+ dstAddr: utils.Ipv6Addr2.AddressWithPrefix.Address,
+ rx: rxICMPv6EchoRequest,
+ checker: func(t *testing.T, b []byte) {
+ forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address)
+ },
+ },
+ {
+ name: "IPv6 multicast",
+ srcAddr: utils.RemoteIPv6Addr,
+ dstAddr: ipv6GlobalMulticastAddr,
+ rx: rxICMPv6EchoRequest,
+ checker: func(t *testing.T, b []byte) {
+ forwardedICMPv6EchoRequestChecker(t, b, utils.RemoteIPv6Addr, ipv6GlobalMulticastAddr)
+ },
+ },
+ }
+
+ netProtos := [...]tcpip.NetworkProtocolNumber{ipv4.ProtocolNumber, ipv6.ProtocolNumber}
+
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ s := stack.New(stack.Options{
+ NetworkProtocols: []stack.NetworkProtocolFactory{
+ // ARP is not used in this test but it is a network protocol that does
+ // not support forwarding. We install the protocol to make sure that
+ // forwarding information for a NIC is only reported for network
+ // protocols that support forwarding.
+ arp.NewProtocol,
+
+ ipv4.NewProtocol,
+ ipv6.NewProtocol,
+ },
+ TransportProtocols: []stack.TransportProtocolFactory{udp.NewProtocol},
+ })
+
+ e1 := channel.New(1, header.IPv6MinimumMTU, "")
+ if err := s.CreateNIC(nicID1, e1); err != nil {
+ t.Fatalf("s.CreateNIC(%d, _): %s", nicID1, err)
+ }
+
+ e2 := channel.New(1, header.IPv6MinimumMTU, "")
+ if err := s.CreateNIC(nicID2, e2); err != nil {
+ t.Fatalf("s.CreateNIC(%d, _): %s", nicID2, err)
+ }
+
+ for _, add := range [...]struct {
+ nicID tcpip.NICID
+ addr tcpip.ProtocolAddress
+ }{
+ {
+ nicID: nicID1,
+ addr: utils.RouterNIC1IPv4Addr,
+ },
+ {
+ nicID: nicID1,
+ addr: utils.RouterNIC1IPv6Addr,
+ },
+ {
+ nicID: nicID2,
+ addr: utils.RouterNIC2IPv4Addr,
+ },
+ {
+ nicID: nicID2,
+ addr: utils.RouterNIC2IPv6Addr,
+ },
+ } {
+ if err := s.AddProtocolAddress(add.nicID, add.addr); err != nil {
+ t.Fatalf("s.AddProtocolAddress(%d, %#v): %s", add.nicID, add.addr, err)
+ }
+ }
+
+ // Only enable forwarding on NIC1 and make sure that only packets arriving
+ // on NIC1 are forwarded.
+ for _, netProto := range netProtos {
+ if err := s.SetNICForwarding(nicID1, netProto, true); err != nil {
+ t.Fatalf("s.SetNICForwarding(%d, %d, true): %s", nicID1, netProtos, err)
+ }
+ }
+
+ nicsInfo := s.NICInfo()
+ for _, subTest := range [...]struct {
+ nicID tcpip.NICID
+ nicEP *channel.Endpoint
+ otherNICID tcpip.NICID
+ otherNICEP *channel.Endpoint
+ expectForwarding bool
+ }{
+ {
+ nicID: nicID1,
+ nicEP: e1,
+ otherNICID: nicID2,
+ otherNICEP: e2,
+ expectForwarding: true,
+ },
+ {
+ nicID: nicID2,
+ nicEP: e2,
+ otherNICID: nicID2,
+ otherNICEP: e1,
+ expectForwarding: false,
+ },
+ } {
+ t.Run(fmt.Sprintf("Packet arriving at NIC%d", subTest.nicID), func(t *testing.T) {
+ nicInfo, ok := nicsInfo[subTest.nicID]
+ if !ok {
+ t.Errorf("expected NIC info for NIC %d; got = %#v", subTest.nicID, nicsInfo)
+ } else {
+ forwarding := make(map[tcpip.NetworkProtocolNumber]bool)
+ for _, netProto := range netProtos {
+ forwarding[netProto] = subTest.expectForwarding
+ }
+
+ if diff := cmp.Diff(forwarding, nicInfo.Forwarding); diff != "" {
+ t.Errorf("nicsInfo[%d].Forwarding mismatch (-want +got):\n%s", subTest.nicID, diff)
+ }
+ }
+
+ s.SetRouteTable([]tcpip.Route{
+ {
+ Destination: header.IPv4EmptySubnet,
+ NIC: subTest.otherNICID,
+ },
+ {
+ Destination: header.IPv6EmptySubnet,
+ NIC: subTest.otherNICID,
+ },
+ })
+
+ test.rx(subTest.nicEP, test.srcAddr, test.dstAddr)
+ if p, ok := subTest.nicEP.Read(); ok {
+ t.Errorf("unexpectedly got a response from the interface the packet arrived on: %#v", p)
+ }
+ if p, ok := subTest.otherNICEP.Read(); ok != subTest.expectForwarding {
+ t.Errorf("got otherNICEP.Read() = (%#v, %t), want = (_, %t)", p, ok, subTest.expectForwarding)
+ } else if subTest.expectForwarding {
+ test.checker(t, stack.PayloadSince(p.Pkt.NetworkHeader()))
+ }
+ })
+ }
+ })
+ }
+}
diff --git a/pkg/tcpip/tests/integration/iptables_test.go b/pkg/tcpip/tests/integration/iptables_test.go
index c61d4e788..07ba2b837 100644
--- a/pkg/tcpip/tests/integration/iptables_test.go
+++ b/pkg/tcpip/tests/integration/iptables_test.go
@@ -19,12 +19,14 @@ import (
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
+ "gvisor.dev/gvisor/pkg/tcpip/checker"
"gvisor.dev/gvisor/pkg/tcpip/header"
"gvisor.dev/gvisor/pkg/tcpip/link/channel"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/tcpip/tests/utils"
+ "gvisor.dev/gvisor/pkg/tcpip/testutil"
"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
)
@@ -645,3 +647,297 @@ func TestIPTableWritePackets(t *testing.T) {
})
}
}
+
+const ttl = 64
+
+var (
+ ipv4GlobalMulticastAddr = testutil.MustParse4("224.0.1.10")
+ ipv6GlobalMulticastAddr = testutil.MustParse6("ff0e::a")
+)
+
+func rxICMPv4EchoReply(e *channel.Endpoint, src, dst tcpip.Address) {
+ utils.RxICMPv4EchoReply(e, src, dst, ttl)
+}
+
+func rxICMPv6EchoReply(e *channel.Endpoint, src, dst tcpip.Address) {
+ utils.RxICMPv6EchoReply(e, src, dst, ttl)
+}
+
+func forwardedICMPv4EchoReplyChecker(t *testing.T, b []byte, src, dst tcpip.Address) {
+ checker.IPv4(t, b,
+ checker.SrcAddr(src),
+ checker.DstAddr(dst),
+ checker.TTL(ttl-1),
+ checker.ICMPv4(
+ checker.ICMPv4Type(header.ICMPv4EchoReply)))
+}
+
+func forwardedICMPv6EchoReplyChecker(t *testing.T, b []byte, src, dst tcpip.Address) {
+ checker.IPv6(t, b,
+ checker.SrcAddr(src),
+ checker.DstAddr(dst),
+ checker.TTL(ttl-1),
+ checker.ICMPv6(
+ checker.ICMPv6Type(header.ICMPv6EchoReply)))
+}
+
+func TestForwardingHook(t *testing.T) {
+ const (
+ nicID1 = 1
+ nicID2 = 2
+
+ nic1Name = "nic1"
+ nic2Name = "nic2"
+
+ otherNICName = "otherNIC"
+ )
+
+ tests := []struct {
+ name string
+ netProto tcpip.NetworkProtocolNumber
+ local bool
+ srcAddr, dstAddr tcpip.Address
+ rx func(*channel.Endpoint, tcpip.Address, tcpip.Address)
+ checker func(*testing.T, []byte)
+ }{
+ {
+ name: "IPv4 remote",
+ netProto: ipv4.ProtocolNumber,
+ local: false,
+ srcAddr: utils.RemoteIPv4Addr,
+ dstAddr: utils.Ipv4Addr2.AddressWithPrefix.Address,
+ rx: rxICMPv4EchoReply,
+ checker: func(t *testing.T, b []byte) {
+ forwardedICMPv4EchoReplyChecker(t, b, utils.RemoteIPv4Addr, utils.Ipv4Addr2.AddressWithPrefix.Address)
+ },
+ },
+ {
+ name: "IPv4 local",
+ netProto: ipv4.ProtocolNumber,
+ local: true,
+ srcAddr: utils.RemoteIPv4Addr,
+ dstAddr: utils.Ipv4Addr.Address,
+ rx: rxICMPv4EchoReply,
+ },
+ {
+ name: "IPv6 remote",
+ netProto: ipv6.ProtocolNumber,
+ local: false,
+ srcAddr: utils.RemoteIPv6Addr,
+ dstAddr: utils.Ipv6Addr2.AddressWithPrefix.Address,
+ rx: rxICMPv6EchoReply,
+ checker: func(t *testing.T, b []byte) {
+ forwardedICMPv6EchoReplyChecker(t, b, utils.RemoteIPv6Addr, utils.Ipv6Addr2.AddressWithPrefix.Address)
+ },
+ },
+ {
+ name: "IPv6 local",
+ netProto: ipv6.ProtocolNumber,
+ local: true,
+ srcAddr: utils.RemoteIPv6Addr,
+ dstAddr: utils.Ipv6Addr.Address,
+ rx: rxICMPv6EchoReply,
+ },
+ }
+
+ setupDropFilter := func(f stack.IPHeaderFilter) func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) {
+ return func(t *testing.T, s *stack.Stack, netProto tcpip.NetworkProtocolNumber) {
+ t.Helper()
+
+ ipv6 := netProto == ipv6.ProtocolNumber
+
+ ipt := s.IPTables()
+ filter := ipt.GetTable(stack.FilterID, ipv6)
+ ruleIdx := filter.BuiltinChains[stack.Forward]
+ filter.Rules[ruleIdx].Filter = f
+ filter.Rules[ruleIdx].Target = &stack.DropTarget{NetworkProtocol: netProto}
+ // Make sure the packet is not dropped by the next rule.
+ filter.Rules[ruleIdx+1].Target = &stack.AcceptTarget{NetworkProtocol: netProto}
+ if err := ipt.ReplaceTable(stack.FilterID, filter, ipv6); err != nil {
+ t.Fatalf("ipt.RelaceTable(%d, _, %t): %s", stack.FilterID, ipv6, err)
+ }
+ }
+ }
+
+ boolToInt := func(v bool) uint64 {
+ if v {
+ return 1
+ }
+ return 0
+ }
+
+ subTests := []struct {
+ name string
+ setupFilter func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber)
+ expectForward bool
+ }{
+ {
+ name: "Accept",
+ setupFilter: func(*testing.T, *stack.Stack, tcpip.NetworkProtocolNumber) { /* no filter */ },
+ expectForward: true,
+ },
+
+ {
+ name: "Drop",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{}),
+ expectForward: false,
+ },
+ {
+ name: "Drop with input NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name}),
+ expectForward: false,
+ },
+ {
+ name: "Drop with output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{OutputInterface: nic2Name}),
+ expectForward: false,
+ },
+ {
+ name: "Drop with input and output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name, OutputInterface: nic2Name}),
+ expectForward: false,
+ },
+
+ {
+ name: "Drop with other input NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: otherNICName}),
+ expectForward: true,
+ },
+ {
+ name: "Drop with other output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{OutputInterface: otherNICName}),
+ expectForward: true,
+ },
+ {
+ name: "Drop with other input and output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: otherNICName, OutputInterface: nic2Name}),
+ expectForward: true,
+ },
+ {
+ name: "Drop with input and other output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name, OutputInterface: otherNICName}),
+ expectForward: true,
+ },
+ {
+ name: "Drop with other input and other output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: otherNICName, OutputInterface: otherNICName}),
+ expectForward: true,
+ },
+
+ {
+ name: "Drop with inverted input NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{InputInterface: nic1Name, InputInterfaceInvert: true}),
+ expectForward: true,
+ },
+ {
+ name: "Drop with inverted output NIC filtering",
+ setupFilter: setupDropFilter(stack.IPHeaderFilter{OutputInterface: nic2Name, OutputInterfaceInvert: true}),
+ expectForward: true,
+ },
+ }
+
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ for _, subTest := range subTests {
+ t.Run(subTest.name, func(t *testing.T) {
+ s := stack.New(stack.Options{
+ NetworkProtocols: []stack.NetworkProtocolFactory{ipv4.NewProtocol, ipv6.NewProtocol},
+ })
+
+ subTest.setupFilter(t, s, test.netProto)
+
+ e1 := channel.New(1, header.IPv6MinimumMTU, "")
+ if err := s.CreateNICWithOptions(nicID1, e1, stack.NICOptions{Name: nic1Name}); err != nil {
+ t.Fatalf("s.CreateNICWithOptions(%d, _, _): %s", nicID1, err)
+ }
+
+ e2 := channel.New(1, header.IPv6MinimumMTU, "")
+ if err := s.CreateNICWithOptions(nicID2, e2, stack.NICOptions{Name: nic2Name}); err != nil {
+ t.Fatalf("s.CreateNICWithOptions(%d, _, _): %s", nicID2, err)
+ }
+
+ if err := s.AddAddress(nicID2, ipv4.ProtocolNumber, utils.Ipv4Addr.Address); err != nil {
+ t.Fatalf("s.AddAddress(%d, %d, %s): %s", nicID2, ipv4.ProtocolNumber, utils.Ipv4Addr.Address, err)
+ }
+ if err := s.AddAddress(nicID2, ipv6.ProtocolNumber, utils.Ipv6Addr.Address); err != nil {
+ t.Fatalf("s.AddAddress(%d, %d, %s): %s", nicID2, ipv6.ProtocolNumber, utils.Ipv6Addr.Address, err)
+ }
+
+ if err := s.SetForwardingDefaultAndAllNICs(ipv4.ProtocolNumber, true); err != nil {
+ t.Fatalf("s.SetForwardingDefaultAndAllNICs(%d, true): %s", ipv4.ProtocolNumber, err)
+ }
+ if err := s.SetForwardingDefaultAndAllNICs(ipv6.ProtocolNumber, true); err != nil {
+ t.Fatalf("s.SetForwardingDefaultAndAllNICs(%d, true): %s", ipv6.ProtocolNumber, err)
+ }
+
+ s.SetRouteTable([]tcpip.Route{
+ {
+ Destination: header.IPv4EmptySubnet,
+ NIC: nicID2,
+ },
+ {
+ Destination: header.IPv6EmptySubnet,
+ NIC: nicID2,
+ },
+ })
+
+ test.rx(e1, test.srcAddr, test.dstAddr)
+
+ expectTransmitPacket := subTest.expectForward && !test.local
+
+ ep1, err := s.GetNetworkEndpoint(nicID1, test.netProto)
+ if err != nil {
+ t.Fatalf("s.GetNetworkEndpoint(%d, %d): %s", nicID1, test.netProto, err)
+ }
+ ep1Stats := ep1.Stats()
+ ipEP1Stats, ok := ep1Stats.(stack.IPNetworkEndpointStats)
+ if !ok {
+ t.Fatalf("got ep1Stats = %T, want = stack.IPNetworkEndpointStats", ep1Stats)
+ }
+ ip1Stats := ipEP1Stats.IPStats()
+
+ if got := ip1Stats.PacketsReceived.Value(); got != 1 {
+ t.Errorf("got ip1Stats.PacketsReceived.Value() = %d, want = 1", got)
+ }
+ if got := ip1Stats.ValidPacketsReceived.Value(); got != 1 {
+ t.Errorf("got ip1Stats.ValidPacketsReceived.Value() = %d, want = 1", got)
+ }
+ if got, want := ip1Stats.IPTablesForwardDropped.Value(), boolToInt(!subTest.expectForward); got != want {
+ t.Errorf("got ip1Stats.IPTablesForwardDropped.Value() = %d, want = %d", got, want)
+ }
+ if got := ip1Stats.PacketsSent.Value(); got != 0 {
+ t.Errorf("got ip1Stats.PacketsSent.Value() = %d, want = 0", got)
+ }
+
+ ep2, err := s.GetNetworkEndpoint(nicID2, test.netProto)
+ if err != nil {
+ t.Fatalf("s.GetNetworkEndpoint(%d, %d): %s", nicID2, test.netProto, err)
+ }
+ ep2Stats := ep2.Stats()
+ ipEP2Stats, ok := ep2Stats.(stack.IPNetworkEndpointStats)
+ if !ok {
+ t.Fatalf("got ep2Stats = %T, want = stack.IPNetworkEndpointStats", ep2Stats)
+ }
+ ip2Stats := ipEP2Stats.IPStats()
+ if got := ip2Stats.PacketsReceived.Value(); got != 0 {
+ t.Errorf("got ip2Stats.PacketsReceived.Value() = %d, want = 0", got)
+ }
+ if got, want := ip2Stats.ValidPacketsReceived.Value(), boolToInt(subTest.expectForward && test.local); got != want {
+ t.Errorf("got ip2Stats.ValidPacketsReceived.Value() = %d, want = %d", got, want)
+ }
+ if got, want := ip2Stats.PacketsSent.Value(), boolToInt(expectTransmitPacket); got != want {
+ t.Errorf("got ip2Stats.PacketsSent.Value() = %d, want = %d", got, want)
+ }
+
+ p, ok := e2.Read()
+ if ok != expectTransmitPacket {
+ t.Fatalf("got e2.Read() = (%#v, %t), want = (_, %t)", p, ok, expectTransmitPacket)
+ }
+ if expectTransmitPacket {
+ test.checker(t, stack.PayloadSince(p.Pkt.NetworkHeader()))
+ }
+ })
+ }
+ })
+ }
+}
diff --git a/pkg/tcpip/tests/integration/link_resolution_test.go b/pkg/tcpip/tests/integration/link_resolution_test.go
index c657714ba..9f727eb8f 100644
--- a/pkg/tcpip/tests/integration/link_resolution_test.go
+++ b/pkg/tcpip/tests/integration/link_resolution_test.go
@@ -17,22 +17,26 @@ package link_resolution_test
import (
"bytes"
"fmt"
+ "net"
"testing"
"time"
"github.com/google/go-cmp/cmp"
"github.com/google/go-cmp/cmp/cmpopts"
+ "gvisor.dev/gvisor/pkg/context"
"gvisor.dev/gvisor/pkg/tcpip"
"gvisor.dev/gvisor/pkg/tcpip/buffer"
"gvisor.dev/gvisor/pkg/tcpip/checker"
"gvisor.dev/gvisor/pkg/tcpip/faketime"
"gvisor.dev/gvisor/pkg/tcpip/header"
+ "gvisor.dev/gvisor/pkg/tcpip/link/channel"
"gvisor.dev/gvisor/pkg/tcpip/link/pipe"
"gvisor.dev/gvisor/pkg/tcpip/network/arp"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv4"
"gvisor.dev/gvisor/pkg/tcpip/network/ipv6"
"gvisor.dev/gvisor/pkg/tcpip/stack"
"gvisor.dev/gvisor/pkg/tcpip/tests/utils"
+ tcptestutil "gvisor.dev/gvisor/pkg/tcpip/testutil"
"gvisor.dev/gvisor/pkg/tcpip/transport/icmp"
"gvisor.dev/gvisor/pkg/tcpip/transport/tcp"
"gvisor.dev/gvisor/pkg/tcpip/transport/udp"
@@ -395,6 +399,246 @@ func TestTCPLinkResolutionFailure(t *testing.T) {
}
}
+func TestForwardingWithLinkResolutionFailure(t *testing.T) {
+ const (
+ incomingNICID = 1
+ outgoingNICID = 2
+ ttl = 2
+ expectedHostUnreachableErrorCount = 1
+ )
+ outgoingLinkAddr := tcptestutil.MustParseLink("02:03:03:04:05:06")
+
+ rxICMPv4EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) {
+ utils.RxICMPv4EchoRequest(e, src, dst, ttl)
+ }
+
+ rxICMPv6EchoRequest := func(e *channel.Endpoint, src, dst tcpip.Address) {
+ utils.RxICMPv6EchoRequest(e, src, dst, ttl)
+ }
+
+ arpChecker := func(t *testing.T, request channel.PacketInfo, src, dst tcpip.Address) {
+ if request.Proto != arp.ProtocolNumber {
+ t.Errorf("got request.Proto = %d, want = %d", request.Proto, arp.ProtocolNumber)
+ }
+ if request.Route.RemoteLinkAddress != header.EthernetBroadcastAddress {
+ t.Errorf("got request.Route.RemoteLinkAddress = %s, want = %s", request.Route.RemoteLinkAddress, header.EthernetBroadcastAddress)
+ }
+ rep := header.ARP(request.Pkt.NetworkHeader().View())
+ if got := rep.Op(); got != header.ARPRequest {
+ t.Errorf("got Op() = %d, want = %d", got, header.ARPRequest)
+ }
+ if got := tcpip.LinkAddress(rep.HardwareAddressSender()); got != outgoingLinkAddr {
+ t.Errorf("got HardwareAddressSender = %s, want = %s", got, outgoingLinkAddr)
+ }
+ if got := tcpip.Address(rep.ProtocolAddressSender()); got != src {
+ t.Errorf("got ProtocolAddressSender = %s, want = %s", got, src)
+ }
+ if got := tcpip.Address(rep.ProtocolAddressTarget()); got != dst {
+ t.Errorf("got ProtocolAddressTarget = %s, want = %s", got, dst)
+ }
+ }
+
+ ndpChecker := func(t *testing.T, request channel.PacketInfo, src, dst tcpip.Address) {
+ if request.Proto != header.IPv6ProtocolNumber {
+ t.Fatalf("got Proto = %d, want = %d", request.Proto, header.IPv6ProtocolNumber)
+ }
+
+ snmc := header.SolicitedNodeAddr(dst)
+ if want := header.EthernetAddressFromMulticastIPv6Address(snmc); request.Route.RemoteLinkAddress != want {
+ t.Errorf("got remote link address = %s, want = %s", request.Route.RemoteLinkAddress, want)
+ }
+
+ checker.IPv6(t, stack.PayloadSince(request.Pkt.NetworkHeader()),
+ checker.SrcAddr(src),
+ checker.DstAddr(snmc),
+ checker.TTL(header.NDPHopLimit),
+ checker.NDPNS(
+ checker.NDPNSTargetAddress(dst),
+ ))
+ }
+
+ icmpv4Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) {
+ checker.IPv4(t, b,
+ checker.SrcAddr(src),
+ checker.DstAddr(dst),
+ checker.TTL(ipv4.DefaultTTL),
+ checker.ICMPv4(
+ checker.ICMPv4Checksum(),
+ checker.ICMPv4Type(header.ICMPv4DstUnreachable),
+ checker.ICMPv4Code(header.ICMPv4HostUnreachable),
+ ),
+ )
+ }
+
+ icmpv6Checker := func(t *testing.T, b []byte, src, dst tcpip.Address) {
+ checker.IPv6(t, b,
+ checker.SrcAddr(src),
+ checker.DstAddr(dst),
+ checker.TTL(ipv6.DefaultTTL),
+ checker.ICMPv6(
+ checker.ICMPv6Type(header.ICMPv6DstUnreachable),
+ checker.ICMPv6Code(header.ICMPv6AddressUnreachable),
+ ),
+ )
+ }
+
+ tests := []struct {
+ name string
+ networkProtocolFactory []stack.NetworkProtocolFactory
+ networkProtocolNumber tcpip.NetworkProtocolNumber
+ sourceAddr tcpip.Address
+ destAddr tcpip.Address
+ incomingAddr tcpip.AddressWithPrefix
+ outgoingAddr tcpip.AddressWithPrefix
+ transportProtocol func(*stack.Stack) stack.TransportProtocol
+ rx func(*channel.Endpoint, tcpip.Address, tcpip.Address)
+ linkResolutionRequestChecker func(*testing.T, channel.PacketInfo, tcpip.Address, tcpip.Address)
+ icmpReplyChecker func(*testing.T, []byte, tcpip.Address, tcpip.Address)
+ mtu uint32
+ }{
+ {
+ name: "IPv4 Host unreachable",
+ networkProtocolFactory: []stack.NetworkProtocolFactory{arp.NewProtocol, ipv4.NewProtocol},
+ networkProtocolNumber: header.IPv4ProtocolNumber,
+ sourceAddr: tcptestutil.MustParse4("10.0.0.2"),
+ destAddr: tcptestutil.MustParse4("11.0.0.2"),
+ incomingAddr: tcpip.AddressWithPrefix{
+ Address: tcpip.Address(net.ParseIP("10.0.0.1").To4()),
+ PrefixLen: 8,
+ },
+ outgoingAddr: tcpip.AddressWithPrefix{
+ Address: tcpip.Address(net.ParseIP("11.0.0.1").To4()),
+ PrefixLen: 8,
+ },
+ transportProtocol: icmp.NewProtocol4,
+ linkResolutionRequestChecker: arpChecker,
+ icmpReplyChecker: icmpv4Checker,
+ rx: rxICMPv4EchoRequest,
+ mtu: ipv4.MaxTotalSize,
+ },
+ {
+ name: "IPv6 Host unreachable",
+ networkProtocolFactory: []stack.NetworkProtocolFactory{ipv6.NewProtocol},
+ networkProtocolNumber: header.IPv6ProtocolNumber,
+ sourceAddr: tcptestutil.MustParse6("10::2"),
+ destAddr: tcptestutil.MustParse6("11::2"),
+ incomingAddr: tcpip.AddressWithPrefix{
+ Address: tcpip.Address(net.ParseIP("10::1").To16()),
+ PrefixLen: 64,
+ },
+ outgoingAddr: tcpip.AddressWithPrefix{
+ Address: tcpip.Address(net.ParseIP("11::1").To16()),
+ PrefixLen: 64,
+ },
+ transportProtocol: icmp.NewProtocol6,
+ linkResolutionRequestChecker: ndpChecker,
+ icmpReplyChecker: icmpv6Checker,
+ rx: rxICMPv6EchoRequest,
+ mtu: header.IPv6MinimumMTU,
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.name, func(t *testing.T) {
+ clock := faketime.NewManualClock()
+
+ s := stack.New(stack.Options{
+ NetworkProtocols: test.networkProtocolFactory,
+ TransportProtocols: []stack.TransportProtocolFactory{test.transportProtocol},
+ Clock: clock,
+ })
+
+ // Set up endpoint through which we will receive packets.
+ incomingEndpoint := channel.New(1, test.mtu, "")
+ if err := s.CreateNIC(incomingNICID, incomingEndpoint); err != nil {
+ t.Fatalf("CreateNIC(%d, _): %s", incomingNICID, err)
+ }
+ incomingProtoAddr := tcpip.ProtocolAddress{
+ Protocol: test.networkProtocolNumber,
+ AddressWithPrefix: test.incomingAddr,
+ }
+ if err := s.AddProtocolAddress(incomingNICID, incomingProtoAddr); err != nil {
+ t.Fatalf("AddProtocolAddress(%d, %#v): %s", incomingNICID, incomingProtoAddr, err)
+ }
+
+ // Set up endpoint through which we will attempt to forward packets.
+ outgoingEndpoint := channel.New(1, test.mtu, outgoingLinkAddr)
+ outgoingEndpoint.LinkEPCapabilities |= stack.CapabilityResolutionRequired
+ if err := s.CreateNIC(outgoingNICID, outgoingEndpoint); err != nil {
+ t.Fatalf("CreateNIC(%d, _): %s", outgoingNICID, err)
+ }
+ outgoingProtoAddr := tcpip.ProtocolAddress{
+ Protocol: test.networkProtocolNumber,
+ AddressWithPrefix: test.outgoingAddr,
+ }
+ if err := s.AddProtocolAddress(outgoingNICID, outgoingProtoAddr); err != nil {
+ t.Fatalf("AddProtocolAddress(%d, %#v): %s", outgoingNICID, outgoingProtoAddr, err)
+ }
+
+ s.SetRouteTable([]tcpip.Route{
+ {
+ Destination: test.incomingAddr.Subnet(),
+ NIC: incomingNICID,
+ },
+ {
+ Destination: test.outgoingAddr.Subnet(),
+ NIC: outgoingNICID,
+ },
+ })
+
+ if err := s.SetForwardingDefaultAndAllNICs(test.networkProtocolNumber, true); err != nil {
+ t.Fatalf("SetForwardingDefaultAndAllNICs(%d, true): %s", test.networkProtocolNumber, err)
+ }
+
+ test.rx(incomingEndpoint, test.sourceAddr, test.destAddr)
+
+ var request channel.PacketInfo
+ var ok bool
+ nudConfigs, err := s.NUDConfigurations(outgoingNICID, test.networkProtocolNumber)
+ if err != nil {
+ t.Fatalf("s.NUDConfigurations(%d, %d): %s", outgoingNICID, test.networkProtocolNumber, err)
+ }
+ // Trigger the first packet on the endpoint.
+ clock.RunImmediatelyScheduledJobs()
+
+ for i := 0; i < int(nudConfigs.MaxMulticastProbes); i++ {
+ if request, ok = outgoingEndpoint.Read(); !ok {
+ t.Fatal("expected ARP packet through outgoing NIC")
+ }
+
+ test.linkResolutionRequestChecker(t, request, test.outgoingAddr.Address, test.destAddr)
+
+ // Advance the clock the span of one request timeout.
+ clock.Advance(nudConfigs.RetransmitTimer)
+ }
+
+ // Next, we make a blocking read to retrieve the error packet. This is
+ // necessary because outgoing packets are dequeued asynchronously when
+ // link resolution fails, and this dequeue is what triggers the ICMP
+ // error.
+ //
+ // TODO(gvisor.dev/issue/6012): Replace with asynchronous read after we
+ // have integrated the stack clock with the dequeuing code.
+ reply, ok := incomingEndpoint.ReadContext(context.Background())
+ if !ok {
+ t.Fatal("expected ICMP packet through incoming NIC")
+ }
+
+ test.icmpReplyChecker(t, stack.PayloadSince(reply.Pkt.NetworkHeader()), test.incomingAddr.Address, test.sourceAddr)
+
+ // Since link resolution failed, we don't expect the packet to be
+ // forwarded.
+ forwardedPacket, ok := outgoingEndpoint.Read()
+ if ok {
+ t.Fatalf("expected no ICMP Echo packet through outgoing NIC, instead found: %#v", forwardedPacket)
+ }
+
+ if got, want := s.Stats().IP.Forwarding.HostUnreachable.Value(), expectedHostUnreachableErrorCount; int(got) != want {
+ t.Errorf("got rt.Stats().IP.Forwarding.HostUnreachable.Value() = %d, want = %d", got, want)
+ }
+ })
+ }
+}
+
func TestGetLinkAddress(t *testing.T) {
const (
host1NICID = 1
diff --git a/pkg/tcpip/tests/integration/loopback_test.go b/pkg/tcpip/tests/integration/loopback_test.go
index 3df1bbd68..87d36e1dd 100644
--- a/pkg/tcpip/tests/integration/loopback_test.go
+++ b/pkg/tcpip/tests/integration/loopback_test.go
@@ -714,11 +714,11 @@ func TestExternalLoopbackTraffic(t *testing.T) {
}
if test.forwarding {
- if err := s.SetForwarding(ipv4.ProtocolNumber, true); err != nil {
- t.Fatalf("SetForwarding(%d, true): %s", ipv4.ProtocolNumber, err)
+ if err := s.SetForwardingDefaultAndAllNICs(ipv4.ProtocolNumber, true); err != nil {
+ t.Fatalf("SetForwardingDefaultAndAllNICs(%d, true): %s", ipv4.ProtocolNumber, err)
}
- if err := s.SetForwarding(ipv6.ProtocolNumber, true); err != nil {
- t.Fatalf("SetForwarding(%d, true): %s", ipv6.ProtocolNumber, err)
+ if err := s.SetForwardingDefaultAndAllNICs(ipv6.ProtocolNumber, true); err != nil {
+ t.Fatalf("SetForwardingDefaultAndAllNICs(%d, true): %s", ipv6.ProtocolNumber, err)
}
}
generated by cgit v1.2.3 (git 2.39.1) at 2025-04-12 23:40:39 +0000