diff options
Diffstat (limited to 'pkg/tcpip/stack/transport_test.go')
| -rw-r--r-- | pkg/tcpip/stack/transport_test.go | 629 |
1 files changed, 0 insertions, 629 deletions
diff --git a/pkg/tcpip/stack/transport_test.go b/pkg/tcpip/stack/transport_test.go deleted file mode 100644 index 748ce4ea5..000000000 --- a/pkg/tcpip/stack/transport_test.go +++ /dev/null @@ -1,629 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -package stack_test - -import ( - "testing" - - "gvisor.dev/gvisor/pkg/tcpip" - "gvisor.dev/gvisor/pkg/tcpip/buffer" - "gvisor.dev/gvisor/pkg/tcpip/iptables" - "gvisor.dev/gvisor/pkg/tcpip/link/channel" - "gvisor.dev/gvisor/pkg/tcpip/link/loopback" - "gvisor.dev/gvisor/pkg/tcpip/stack" - "gvisor.dev/gvisor/pkg/waiter" -) - -const ( - fakeTransNumber tcpip.TransportProtocolNumber = 1 - fakeTransHeaderLen = 3 -) - -// fakeTransportEndpoint is a transport-layer protocol endpoint. It counts -// received packets; the counts of all endpoints are aggregated in the protocol -// descriptor. -// -// Headers of this protocol are fakeTransHeaderLen bytes, but we currently don't -// use it. -type fakeTransportEndpoint struct { - stack.TransportEndpointInfo - stack *stack.Stack - proto *fakeTransportProtocol - peerAddr tcpip.Address - route stack.Route - uniqueID uint64 - - // acceptQueue is non-nil iff bound. - acceptQueue []fakeTransportEndpoint -} - -func (f *fakeTransportEndpoint) Info() tcpip.EndpointInfo { - return &f.TransportEndpointInfo -} - -func (f *fakeTransportEndpoint) Stats() tcpip.EndpointStats { - return nil -} - -func newFakeTransportEndpoint(s *stack.Stack, proto *fakeTransportProtocol, netProto tcpip.NetworkProtocolNumber, uniqueID uint64) tcpip.Endpoint { - return &fakeTransportEndpoint{stack: s, TransportEndpointInfo: stack.TransportEndpointInfo{NetProto: netProto}, proto: proto, uniqueID: uniqueID} -} - -func (f *fakeTransportEndpoint) Close() { - f.route.Release() -} - -func (*fakeTransportEndpoint) Readiness(mask waiter.EventMask) waiter.EventMask { - return mask -} - -func (*fakeTransportEndpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages, *tcpip.Error) { - return buffer.View{}, tcpip.ControlMessages{}, nil -} - -func (f *fakeTransportEndpoint) Write(p tcpip.Payloader, opts tcpip.WriteOptions) (int64, <-chan struct{}, *tcpip.Error) { - if len(f.route.RemoteAddress) == 0 { - return 0, nil, tcpip.ErrNoRoute - } - - hdr := buffer.NewPrependable(int(f.route.MaxHeaderLength())) - v, err := p.FullPayload() - if err != nil { - return 0, nil, err - } - if err := f.route.WritePacket(nil /* gso */, stack.NetworkHeaderParams{Protocol: fakeTransNumber, TTL: 123, TOS: stack.DefaultTOS}, tcpip.PacketBuffer{ - Header: hdr, - Data: buffer.View(v).ToVectorisedView(), - }); err != nil { - return 0, nil, err - } - - return int64(len(v)), nil, nil -} - -func (f *fakeTransportEndpoint) Peek([][]byte) (int64, tcpip.ControlMessages, *tcpip.Error) { - return 0, tcpip.ControlMessages{}, nil -} - -// SetSockOpt sets a socket option. Currently not supported. -func (*fakeTransportEndpoint) SetSockOpt(interface{}) *tcpip.Error { - return tcpip.ErrInvalidEndpointState -} - -// SetSockOptInt sets a socket option. Currently not supported. -func (*fakeTransportEndpoint) SetSockOptInt(tcpip.SockOpt, int) *tcpip.Error { - return tcpip.ErrInvalidEndpointState -} - -// GetSockOptInt implements tcpip.Endpoint.GetSockOptInt. -func (*fakeTransportEndpoint) GetSockOptInt(opt tcpip.SockOpt) (int, *tcpip.Error) { - return -1, tcpip.ErrUnknownProtocolOption -} - -// GetSockOpt implements tcpip.Endpoint.GetSockOpt. -func (*fakeTransportEndpoint) GetSockOpt(opt interface{}) *tcpip.Error { - switch opt.(type) { - case tcpip.ErrorOption: - return nil - } - return tcpip.ErrInvalidEndpointState -} - -// Disconnect implements tcpip.Endpoint.Disconnect. -func (*fakeTransportEndpoint) Disconnect() *tcpip.Error { - return tcpip.ErrNotSupported -} - -func (f *fakeTransportEndpoint) Connect(addr tcpip.FullAddress) *tcpip.Error { - f.peerAddr = addr.Addr - - // Find the route. - r, err := f.stack.FindRoute(addr.NIC, "", addr.Addr, fakeNetNumber, false /* multicastLoop */) - if err != nil { - return tcpip.ErrNoRoute - } - defer r.Release() - - // Try to register so that we can start receiving packets. - f.ID.RemoteAddress = addr.Addr - err = f.stack.RegisterTransportEndpoint(0, []tcpip.NetworkProtocolNumber{fakeNetNumber}, fakeTransNumber, f.ID, f, false /* reuse */, 0 /* bindToDevice */) - if err != nil { - return err - } - - f.route = r.Clone() - - return nil -} - -func (f *fakeTransportEndpoint) UniqueID() uint64 { - return f.uniqueID -} - -func (f *fakeTransportEndpoint) ConnectEndpoint(e tcpip.Endpoint) *tcpip.Error { - return nil -} - -func (*fakeTransportEndpoint) Shutdown(tcpip.ShutdownFlags) *tcpip.Error { - return nil -} - -func (*fakeTransportEndpoint) Reset() { -} - -func (*fakeTransportEndpoint) Listen(int) *tcpip.Error { - return nil -} - -func (f *fakeTransportEndpoint) Accept() (tcpip.Endpoint, *waiter.Queue, *tcpip.Error) { - if len(f.acceptQueue) == 0 { - return nil, nil, nil - } - a := f.acceptQueue[0] - f.acceptQueue = f.acceptQueue[1:] - return &a, nil, nil -} - -func (f *fakeTransportEndpoint) Bind(a tcpip.FullAddress) *tcpip.Error { - if err := f.stack.RegisterTransportEndpoint( - a.NIC, - []tcpip.NetworkProtocolNumber{fakeNetNumber}, - fakeTransNumber, - stack.TransportEndpointID{LocalAddress: a.Addr}, - f, - false, /* reuse */ - 0, /* bindtoDevice */ - ); err != nil { - return err - } - f.acceptQueue = []fakeTransportEndpoint{} - return nil -} - -func (*fakeTransportEndpoint) GetLocalAddress() (tcpip.FullAddress, *tcpip.Error) { - return tcpip.FullAddress{}, nil -} - -func (*fakeTransportEndpoint) GetRemoteAddress() (tcpip.FullAddress, *tcpip.Error) { - return tcpip.FullAddress{}, nil -} - -func (f *fakeTransportEndpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, _ tcpip.PacketBuffer) { - // Increment the number of received packets. - f.proto.packetCount++ - if f.acceptQueue != nil { - f.acceptQueue = append(f.acceptQueue, fakeTransportEndpoint{ - stack: f.stack, - TransportEndpointInfo: stack.TransportEndpointInfo{ - ID: f.ID, - NetProto: f.NetProto, - }, - proto: f.proto, - peerAddr: r.RemoteAddress, - route: r.Clone(), - }) - } -} - -func (f *fakeTransportEndpoint) HandleControlPacket(stack.TransportEndpointID, stack.ControlType, uint32, tcpip.PacketBuffer) { - // Increment the number of received control packets. - f.proto.controlCount++ -} - -func (f *fakeTransportEndpoint) State() uint32 { - return 0 -} - -func (f *fakeTransportEndpoint) ModerateRecvBuf(copied int) {} - -func (f *fakeTransportEndpoint) IPTables() (iptables.IPTables, error) { - return iptables.IPTables{}, nil -} - -func (f *fakeTransportEndpoint) Resume(*stack.Stack) {} - -func (f *fakeTransportEndpoint) Wait() {} - -type fakeTransportGoodOption bool - -type fakeTransportBadOption bool - -type fakeTransportInvalidValueOption int - -type fakeTransportProtocolOptions struct { - good bool -} - -// fakeTransportProtocol is a transport-layer protocol descriptor. It -// aggregates the number of packets received via endpoints of this protocol. -type fakeTransportProtocol struct { - packetCount int - controlCount int - opts fakeTransportProtocolOptions -} - -func (*fakeTransportProtocol) Number() tcpip.TransportProtocolNumber { - return fakeTransNumber -} - -func (f *fakeTransportProtocol) NewEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, _ *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) { - return newFakeTransportEndpoint(stack, f, netProto, stack.UniqueID()), nil -} - -func (f *fakeTransportProtocol) NewRawEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, _ *waiter.Queue) (tcpip.Endpoint, *tcpip.Error) { - return nil, tcpip.ErrUnknownProtocol -} - -func (*fakeTransportProtocol) MinimumPacketSize() int { - return fakeTransHeaderLen -} - -func (*fakeTransportProtocol) ParsePorts(buffer.View) (src, dst uint16, err *tcpip.Error) { - return 0, 0, nil -} - -func (*fakeTransportProtocol) HandleUnknownDestinationPacket(*stack.Route, stack.TransportEndpointID, tcpip.PacketBuffer) bool { - return true -} - -func (f *fakeTransportProtocol) SetOption(option interface{}) *tcpip.Error { - switch v := option.(type) { - case fakeTransportGoodOption: - f.opts.good = bool(v) - return nil - case fakeTransportInvalidValueOption: - return tcpip.ErrInvalidOptionValue - default: - return tcpip.ErrUnknownProtocolOption - } -} - -func (f *fakeTransportProtocol) Option(option interface{}) *tcpip.Error { - switch v := option.(type) { - case *fakeTransportGoodOption: - *v = fakeTransportGoodOption(f.opts.good) - return nil - default: - return tcpip.ErrUnknownProtocolOption - } -} - -func fakeTransFactory() stack.TransportProtocol { - return &fakeTransportProtocol{} -} - -func TestTransportReceive(t *testing.T) { - linkEP := channel.New(10, defaultMTU, "") - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()}, - TransportProtocols: []stack.TransportProtocol{fakeTransFactory()}, - }) - if err := s.CreateNIC(1, linkEP); err != nil { - t.Fatalf("CreateNIC failed: %v", err) - } - - { - subnet, err := tcpip.NewSubnet("\x00", "\x00") - if err != nil { - t.Fatal(err) - } - s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}}) - } - - if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil { - t.Fatalf("AddAddress failed: %v", err) - } - - // Create endpoint and connect to remote address. - wq := waiter.Queue{} - ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq) - if err != nil { - t.Fatalf("NewEndpoint failed: %v", err) - } - - if err := ep.Connect(tcpip.FullAddress{0, "\x02", 0}); err != nil { - t.Fatalf("Connect failed: %v", err) - } - - fakeTrans := s.TransportProtocolInstance(fakeTransNumber).(*fakeTransportProtocol) - - // Create buffer that will hold the packet. - buf := buffer.NewView(30) - - // Make sure packet with wrong protocol is not delivered. - buf[0] = 1 - buf[2] = 0 - linkEP.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: buf.ToVectorisedView(), - }) - if fakeTrans.packetCount != 0 { - t.Errorf("packetCount = %d, want %d", fakeTrans.packetCount, 0) - } - - // Make sure packet from the wrong source is not delivered. - buf[0] = 1 - buf[1] = 3 - buf[2] = byte(fakeTransNumber) - linkEP.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: buf.ToVectorisedView(), - }) - if fakeTrans.packetCount != 0 { - t.Errorf("packetCount = %d, want %d", fakeTrans.packetCount, 0) - } - - // Make sure packet is delivered. - buf[0] = 1 - buf[1] = 2 - buf[2] = byte(fakeTransNumber) - linkEP.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: buf.ToVectorisedView(), - }) - if fakeTrans.packetCount != 1 { - t.Errorf("packetCount = %d, want %d", fakeTrans.packetCount, 1) - } -} - -func TestTransportControlReceive(t *testing.T) { - linkEP := channel.New(10, defaultMTU, "") - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()}, - TransportProtocols: []stack.TransportProtocol{fakeTransFactory()}, - }) - if err := s.CreateNIC(1, linkEP); err != nil { - t.Fatalf("CreateNIC failed: %v", err) - } - - { - subnet, err := tcpip.NewSubnet("\x00", "\x00") - if err != nil { - t.Fatal(err) - } - s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}}) - } - - if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil { - t.Fatalf("AddAddress failed: %v", err) - } - - // Create endpoint and connect to remote address. - wq := waiter.Queue{} - ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq) - if err != nil { - t.Fatalf("NewEndpoint failed: %v", err) - } - - if err := ep.Connect(tcpip.FullAddress{0, "\x02", 0}); err != nil { - t.Fatalf("Connect failed: %v", err) - } - - fakeTrans := s.TransportProtocolInstance(fakeTransNumber).(*fakeTransportProtocol) - - // Create buffer that will hold the control packet. - buf := buffer.NewView(2*fakeNetHeaderLen + 30) - - // Outer packet contains the control protocol number. - buf[0] = 1 - buf[1] = 0xfe - buf[2] = uint8(fakeControlProtocol) - - // Make sure packet with wrong protocol is not delivered. - buf[fakeNetHeaderLen+0] = 0 - buf[fakeNetHeaderLen+1] = 1 - buf[fakeNetHeaderLen+2] = 0 - linkEP.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: buf.ToVectorisedView(), - }) - if fakeTrans.controlCount != 0 { - t.Errorf("controlCount = %d, want %d", fakeTrans.controlCount, 0) - } - - // Make sure packet from the wrong source is not delivered. - buf[fakeNetHeaderLen+0] = 3 - buf[fakeNetHeaderLen+1] = 1 - buf[fakeNetHeaderLen+2] = byte(fakeTransNumber) - linkEP.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: buf.ToVectorisedView(), - }) - if fakeTrans.controlCount != 0 { - t.Errorf("controlCount = %d, want %d", fakeTrans.controlCount, 0) - } - - // Make sure packet is delivered. - buf[fakeNetHeaderLen+0] = 2 - buf[fakeNetHeaderLen+1] = 1 - buf[fakeNetHeaderLen+2] = byte(fakeTransNumber) - linkEP.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: buf.ToVectorisedView(), - }) - if fakeTrans.controlCount != 1 { - t.Errorf("controlCount = %d, want %d", fakeTrans.controlCount, 1) - } -} - -func TestTransportSend(t *testing.T) { - linkEP := channel.New(10, defaultMTU, "") - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()}, - TransportProtocols: []stack.TransportProtocol{fakeTransFactory()}, - }) - if err := s.CreateNIC(1, linkEP); err != nil { - t.Fatalf("CreateNIC failed: %v", err) - } - - if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil { - t.Fatalf("AddAddress failed: %v", err) - } - - { - subnet, err := tcpip.NewSubnet("\x00", "\x00") - if err != nil { - t.Fatal(err) - } - s.SetRouteTable([]tcpip.Route{{Destination: subnet, Gateway: "\x00", NIC: 1}}) - } - - // Create endpoint and bind it. - wq := waiter.Queue{} - ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq) - if err != nil { - t.Fatalf("NewEndpoint failed: %v", err) - } - - if err := ep.Connect(tcpip.FullAddress{0, "\x02", 0}); err != nil { - t.Fatalf("Connect failed: %v", err) - } - - // Create buffer that will hold the payload. - view := buffer.NewView(30) - _, _, err = ep.Write(tcpip.SlicePayload(view), tcpip.WriteOptions{}) - if err != nil { - t.Fatalf("write failed: %v", err) - } - - fakeNet := s.NetworkProtocolInstance(fakeNetNumber).(*fakeNetworkProtocol) - - if fakeNet.sendPacketCount[2] != 1 { - t.Errorf("sendPacketCount = %d, want %d", fakeNet.sendPacketCount[2], 1) - } -} - -func TestTransportOptions(t *testing.T) { - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()}, - TransportProtocols: []stack.TransportProtocol{fakeTransFactory()}, - }) - - // Try an unsupported transport protocol. - if err := s.SetTransportProtocolOption(tcpip.TransportProtocolNumber(99999), fakeTransportGoodOption(false)); err != tcpip.ErrUnknownProtocol { - t.Fatalf("SetTransportProtocolOption(fakeTrans2, blah, false) = %v, want = tcpip.ErrUnknownProtocol", err) - } - - testCases := []struct { - option interface{} - wantErr *tcpip.Error - verifier func(t *testing.T, p stack.TransportProtocol) - }{ - {fakeTransportGoodOption(true), nil, func(t *testing.T, p stack.TransportProtocol) { - t.Helper() - fakeTrans := p.(*fakeTransportProtocol) - if fakeTrans.opts.good != true { - t.Fatalf("fakeTrans.opts.good = false, want = true") - } - var v fakeTransportGoodOption - if err := s.TransportProtocolOption(fakeTransNumber, &v); err != nil { - t.Fatalf("s.TransportProtocolOption(fakeTransNumber, &v) = %v, want = nil, where v is option %T", v, err) - } - if v != true { - t.Fatalf("s.TransportProtocolOption(fakeTransNumber, &v) returned v = %v, want = true", v) - } - - }}, - {fakeTransportBadOption(true), tcpip.ErrUnknownProtocolOption, nil}, - {fakeTransportInvalidValueOption(1), tcpip.ErrInvalidOptionValue, nil}, - } - for _, tc := range testCases { - if got := s.SetTransportProtocolOption(fakeTransNumber, tc.option); got != tc.wantErr { - t.Errorf("s.SetTransportProtocolOption(fakeTrans, %v) = %v, want = %v", tc.option, got, tc.wantErr) - } - if tc.verifier != nil { - tc.verifier(t, s.TransportProtocolInstance(fakeTransNumber)) - } - } -} - -func TestTransportForwarding(t *testing.T) { - s := stack.New(stack.Options{ - NetworkProtocols: []stack.NetworkProtocol{fakeNetFactory()}, - TransportProtocols: []stack.TransportProtocol{fakeTransFactory()}, - }) - s.SetForwarding(true) - - // TODO(b/123449044): Change this to a channel NIC. - ep1 := loopback.New() - if err := s.CreateNIC(1, ep1); err != nil { - t.Fatalf("CreateNIC #1 failed: %v", err) - } - if err := s.AddAddress(1, fakeNetNumber, "\x01"); err != nil { - t.Fatalf("AddAddress #1 failed: %v", err) - } - - ep2 := channel.New(10, defaultMTU, "") - if err := s.CreateNIC(2, ep2); err != nil { - t.Fatalf("CreateNIC #2 failed: %v", err) - } - if err := s.AddAddress(2, fakeNetNumber, "\x02"); err != nil { - t.Fatalf("AddAddress #2 failed: %v", err) - } - - // Route all packets to address 3 to NIC 2 and all packets to address - // 1 to NIC 1. - { - subnet0, err := tcpip.NewSubnet("\x03", "\xff") - if err != nil { - t.Fatal(err) - } - subnet1, err := tcpip.NewSubnet("\x01", "\xff") - if err != nil { - t.Fatal(err) - } - s.SetRouteTable([]tcpip.Route{ - {Destination: subnet0, Gateway: "\x00", NIC: 2}, - {Destination: subnet1, Gateway: "\x00", NIC: 1}, - }) - } - - wq := waiter.Queue{} - ep, err := s.NewEndpoint(fakeTransNumber, fakeNetNumber, &wq) - if err != nil { - t.Fatalf("NewEndpoint failed: %v", err) - } - - if err := ep.Bind(tcpip.FullAddress{Addr: "\x01", NIC: 1}); err != nil { - t.Fatalf("Bind failed: %v", err) - } - - // Send a packet to address 1 from address 3. - req := buffer.NewView(30) - req[0] = 1 - req[1] = 3 - req[2] = byte(fakeTransNumber) - ep2.InjectInbound(fakeNetNumber, tcpip.PacketBuffer{ - Data: req.ToVectorisedView(), - }) - - aep, _, err := ep.Accept() - if err != nil || aep == nil { - t.Fatalf("Accept failed: %v, %v", aep, err) - } - - resp := buffer.NewView(30) - if _, _, err := aep.Write(tcpip.SlicePayload(resp), tcpip.WriteOptions{}); err != nil { - t.Fatalf("Write failed: %v", err) - } - - var p channel.PacketInfo - select { - case p = <-ep2.C: - default: - t.Fatal("Response packet not forwarded") - } - - if dst := p.Pkt.Header.View()[0]; dst != 3 { - t.Errorf("Response packet has incorrect destination addresss: got = %d, want = 3", dst) - } - if src := p.Pkt.Header.View()[1]; src != 1 { - t.Errorf("Response packet has incorrect source addresss: got = %d, want = 3", src) - } -} |