summaryrefslogtreecommitdiffhomepage
path: root/test/packetimpact/testbench/connections.go
diff options
context:
space:
mode:
Diffstat (limited to 'test/packetimpact/testbench/connections.go')
-rw-r--r--test/packetimpact/testbench/connections.go869
1 files changed, 0 insertions, 869 deletions
diff --git a/test/packetimpact/testbench/connections.go b/test/packetimpact/testbench/connections.go
deleted file mode 100644
index bf104e5ca..000000000
--- a/test/packetimpact/testbench/connections.go
+++ /dev/null
@@ -1,869 +0,0 @@
-// Copyright 2020 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 testbench has utilities to send and receive packets and also command
-// the DUT to run POSIX functions.
-package testbench
-
-import (
- "fmt"
- "math/rand"
- "net"
- "testing"
- "time"
-
- "github.com/mohae/deepcopy"
- "go.uber.org/multierr"
- "golang.org/x/sys/unix"
- "gvisor.dev/gvisor/pkg/tcpip"
- "gvisor.dev/gvisor/pkg/tcpip/header"
- "gvisor.dev/gvisor/pkg/tcpip/seqnum"
-)
-
-func portFromSockaddr(sa unix.Sockaddr) (uint16, error) {
- switch sa := sa.(type) {
- case *unix.SockaddrInet4:
- return uint16(sa.Port), nil
- case *unix.SockaddrInet6:
- return uint16(sa.Port), nil
- }
- return 0, fmt.Errorf("sockaddr type %T does not contain port", sa)
-}
-
-// pickPort makes a new socket and returns the socket FD and port. The domain should be AF_INET or AF_INET6. The caller must close the FD when done with
-// the port if there is no error.
-func pickPort(domain, typ int) (fd int, sa unix.Sockaddr, err error) {
- fd, err = unix.Socket(domain, typ, 0)
- if err != nil {
- return -1, nil, err
- }
- defer func() {
- if err != nil {
- err = multierr.Append(err, unix.Close(fd))
- }
- }()
- switch domain {
- case unix.AF_INET:
- var sa4 unix.SockaddrInet4
- copy(sa4.Addr[:], net.ParseIP(LocalIPv4).To4())
- sa = &sa4
- case unix.AF_INET6:
- var sa6 unix.SockaddrInet6
- copy(sa6.Addr[:], net.ParseIP(LocalIPv6).To16())
- sa = &sa6
- default:
- return -1, nil, fmt.Errorf("invalid domain %d, it should be one of unix.AF_INET or unix.AF_INET6", domain)
- }
- if err = unix.Bind(fd, sa); err != nil {
- return -1, nil, err
- }
- sa, err = unix.Getsockname(fd)
- if err != nil {
- return -1, nil, err
- }
- return fd, sa, nil
-}
-
-// layerState stores the state of a layer of a connection.
-type layerState interface {
- // outgoing returns an outgoing layer to be sent in a frame. It should not
- // update layerState, that is done in layerState.sent.
- outgoing() Layer
-
- // incoming creates an expected Layer for comparing against a received Layer.
- // Because the expectation can depend on values in the received Layer, it is
- // an input to incoming. For example, the ACK number needs to be checked in a
- // TCP packet but only if the ACK flag is set in the received packet. It
- // should not update layerState, that is done in layerState.received. The
- // caller takes ownership of the returned Layer.
- incoming(received Layer) Layer
-
- // sent updates the layerState based on the Layer that was sent. The input is
- // a Layer with all prev and next pointers populated so that the entire frame
- // as it was sent is available.
- sent(sent Layer) error
-
- // received updates the layerState based on a Layer that is receieved. The
- // input is a Layer with all prev and next pointers populated so that the
- // entire frame as it was receieved is available.
- received(received Layer) error
-
- // close frees associated resources held by the LayerState.
- close() error
-}
-
-// etherState maintains state about an Ethernet connection.
-type etherState struct {
- out, in Ether
-}
-
-var _ layerState = (*etherState)(nil)
-
-// newEtherState creates a new etherState.
-func newEtherState(out, in Ether) (*etherState, error) {
- lMAC, err := tcpip.ParseMACAddress(LocalMAC)
- if err != nil {
- return nil, fmt.Errorf("parsing local MAC: %q: %w", LocalMAC, err)
- }
-
- rMAC, err := tcpip.ParseMACAddress(RemoteMAC)
- if err != nil {
- return nil, fmt.Errorf("parsing remote MAC: %q: %w", RemoteMAC, err)
- }
- s := etherState{
- out: Ether{SrcAddr: &lMAC, DstAddr: &rMAC},
- in: Ether{SrcAddr: &rMAC, DstAddr: &lMAC},
- }
- if err := s.out.merge(&out); err != nil {
- return nil, err
- }
- if err := s.in.merge(&in); err != nil {
- return nil, err
- }
- return &s, nil
-}
-
-func (s *etherState) outgoing() Layer {
- return deepcopy.Copy(&s.out).(Layer)
-}
-
-// incoming implements layerState.incoming.
-func (s *etherState) incoming(Layer) Layer {
- return deepcopy.Copy(&s.in).(Layer)
-}
-
-func (*etherState) sent(Layer) error {
- return nil
-}
-
-func (*etherState) received(Layer) error {
- return nil
-}
-
-func (*etherState) close() error {
- return nil
-}
-
-// ipv4State maintains state about an IPv4 connection.
-type ipv4State struct {
- out, in IPv4
-}
-
-var _ layerState = (*ipv4State)(nil)
-
-// newIPv4State creates a new ipv4State.
-func newIPv4State(out, in IPv4) (*ipv4State, error) {
- lIP := tcpip.Address(net.ParseIP(LocalIPv4).To4())
- rIP := tcpip.Address(net.ParseIP(RemoteIPv4).To4())
- s := ipv4State{
- out: IPv4{SrcAddr: &lIP, DstAddr: &rIP},
- in: IPv4{SrcAddr: &rIP, DstAddr: &lIP},
- }
- if err := s.out.merge(&out); err != nil {
- return nil, err
- }
- if err := s.in.merge(&in); err != nil {
- return nil, err
- }
- return &s, nil
-}
-
-func (s *ipv4State) outgoing() Layer {
- return deepcopy.Copy(&s.out).(Layer)
-}
-
-// incoming implements layerState.incoming.
-func (s *ipv4State) incoming(Layer) Layer {
- return deepcopy.Copy(&s.in).(Layer)
-}
-
-func (*ipv4State) sent(Layer) error {
- return nil
-}
-
-func (*ipv4State) received(Layer) error {
- return nil
-}
-
-func (*ipv4State) close() error {
- return nil
-}
-
-// ipv6State maintains state about an IPv6 connection.
-type ipv6State struct {
- out, in IPv6
-}
-
-var _ layerState = (*ipv6State)(nil)
-
-// newIPv6State creates a new ipv6State.
-func newIPv6State(out, in IPv6) (*ipv6State, error) {
- lIP := tcpip.Address(net.ParseIP(LocalIPv6).To16())
- rIP := tcpip.Address(net.ParseIP(RemoteIPv6).To16())
- s := ipv6State{
- out: IPv6{SrcAddr: &lIP, DstAddr: &rIP},
- in: IPv6{SrcAddr: &rIP, DstAddr: &lIP},
- }
- if err := s.out.merge(&out); err != nil {
- return nil, err
- }
- if err := s.in.merge(&in); err != nil {
- return nil, err
- }
- return &s, nil
-}
-
-// outgoing returns an outgoing layer to be sent in a frame.
-func (s *ipv6State) outgoing() Layer {
- return deepcopy.Copy(&s.out).(Layer)
-}
-
-func (s *ipv6State) incoming(Layer) Layer {
- return deepcopy.Copy(&s.in).(Layer)
-}
-
-func (s *ipv6State) sent(Layer) error {
- // Nothing to do.
- return nil
-}
-
-func (s *ipv6State) received(Layer) error {
- // Nothing to do.
- return nil
-}
-
-// close cleans up any resources held.
-func (s *ipv6State) close() error {
- return nil
-}
-
-// tcpState maintains state about a TCP connection.
-type tcpState struct {
- out, in TCP
- localSeqNum, remoteSeqNum *seqnum.Value
- synAck *TCP
- portPickerFD int
- finSent bool
-}
-
-var _ layerState = (*tcpState)(nil)
-
-// SeqNumValue is a helper routine that allocates a new seqnum.Value value to
-// store v and returns a pointer to it.
-func SeqNumValue(v seqnum.Value) *seqnum.Value {
- return &v
-}
-
-// newTCPState creates a new TCPState.
-func newTCPState(domain int, out, in TCP) (*tcpState, error) {
- portPickerFD, localAddr, err := pickPort(domain, unix.SOCK_STREAM)
- if err != nil {
- return nil, err
- }
- localPort, err := portFromSockaddr(localAddr)
- if err != nil {
- return nil, err
- }
- s := tcpState{
- out: TCP{SrcPort: &localPort},
- in: TCP{DstPort: &localPort},
- localSeqNum: SeqNumValue(seqnum.Value(rand.Uint32())),
- portPickerFD: portPickerFD,
- finSent: false,
- }
- if err := s.out.merge(&out); err != nil {
- return nil, err
- }
- if err := s.in.merge(&in); err != nil {
- return nil, err
- }
- return &s, nil
-}
-
-func (s *tcpState) outgoing() Layer {
- newOutgoing := deepcopy.Copy(s.out).(TCP)
- if s.localSeqNum != nil {
- newOutgoing.SeqNum = Uint32(uint32(*s.localSeqNum))
- }
- if s.remoteSeqNum != nil {
- newOutgoing.AckNum = Uint32(uint32(*s.remoteSeqNum))
- }
- return &newOutgoing
-}
-
-// incoming implements layerState.incoming.
-func (s *tcpState) incoming(received Layer) Layer {
- tcpReceived, ok := received.(*TCP)
- if !ok {
- return nil
- }
- newIn := deepcopy.Copy(s.in).(TCP)
- if s.remoteSeqNum != nil {
- newIn.SeqNum = Uint32(uint32(*s.remoteSeqNum))
- }
- if s.localSeqNum != nil && (*tcpReceived.Flags&header.TCPFlagAck) != 0 {
- // The caller didn't specify an AckNum so we'll expect the calculated one,
- // but only if the ACK flag is set because the AckNum is not valid in a
- // header if ACK is not set.
- newIn.AckNum = Uint32(uint32(*s.localSeqNum))
- }
- return &newIn
-}
-
-func (s *tcpState) sent(sent Layer) error {
- tcp, ok := sent.(*TCP)
- if !ok {
- return fmt.Errorf("can't update tcpState with %T Layer", sent)
- }
- if !s.finSent {
- // update localSeqNum by the payload only when FIN is not yet sent by us
- for current := tcp.next(); current != nil; current = current.next() {
- s.localSeqNum.UpdateForward(seqnum.Size(current.length()))
- }
- }
- if tcp.Flags != nil && *tcp.Flags&(header.TCPFlagSyn|header.TCPFlagFin) != 0 {
- s.localSeqNum.UpdateForward(1)
- }
- if *tcp.Flags&(header.TCPFlagFin) != 0 {
- s.finSent = true
- }
- return nil
-}
-
-func (s *tcpState) received(l Layer) error {
- tcp, ok := l.(*TCP)
- if !ok {
- return fmt.Errorf("can't update tcpState with %T Layer", l)
- }
- s.remoteSeqNum = SeqNumValue(seqnum.Value(*tcp.SeqNum))
- if *tcp.Flags&(header.TCPFlagSyn|header.TCPFlagFin) != 0 {
- s.remoteSeqNum.UpdateForward(1)
- }
- for current := tcp.next(); current != nil; current = current.next() {
- s.remoteSeqNum.UpdateForward(seqnum.Size(current.length()))
- }
- return nil
-}
-
-// close frees the port associated with this connection.
-func (s *tcpState) close() error {
- if err := unix.Close(s.portPickerFD); err != nil {
- return err
- }
- s.portPickerFD = -1
- return nil
-}
-
-// udpState maintains state about a UDP connection.
-type udpState struct {
- out, in UDP
- portPickerFD int
-}
-
-var _ layerState = (*udpState)(nil)
-
-// newUDPState creates a new udpState.
-func newUDPState(domain int, out, in UDP) (*udpState, unix.Sockaddr, error) {
- portPickerFD, localAddr, err := pickPort(domain, unix.SOCK_DGRAM)
- if err != nil {
- return nil, nil, err
- }
- localPort, err := portFromSockaddr(localAddr)
- if err != nil {
- return nil, nil, err
- }
- s := udpState{
- out: UDP{SrcPort: &localPort},
- in: UDP{DstPort: &localPort},
- portPickerFD: portPickerFD,
- }
- if err := s.out.merge(&out); err != nil {
- return nil, nil, err
- }
- if err := s.in.merge(&in); err != nil {
- return nil, nil, err
- }
- return &s, localAddr, nil
-}
-
-func (s *udpState) outgoing() Layer {
- return deepcopy.Copy(&s.out).(Layer)
-}
-
-// incoming implements layerState.incoming.
-func (s *udpState) incoming(Layer) Layer {
- return deepcopy.Copy(&s.in).(Layer)
-}
-
-func (*udpState) sent(l Layer) error {
- return nil
-}
-
-func (*udpState) received(l Layer) error {
- return nil
-}
-
-// close frees the port associated with this connection.
-func (s *udpState) close() error {
- if err := unix.Close(s.portPickerFD); err != nil {
- return err
- }
- s.portPickerFD = -1
- return nil
-}
-
-// Connection holds a collection of layer states for maintaining a connection
-// along with sockets for sniffer and injecting packets.
-type Connection struct {
- layerStates []layerState
- injector Injector
- sniffer Sniffer
- localAddr unix.Sockaddr
- t *testing.T
-}
-
-// Returns the default incoming frame against which to match. If received is
-// longer than layerStates then that may still count as a match. The reverse is
-// never a match and nil is returned.
-func (conn *Connection) incoming(received Layers) Layers {
- if len(received) < len(conn.layerStates) {
- return nil
- }
- in := Layers{}
- for i, s := range conn.layerStates {
- toMatch := s.incoming(received[i])
- if toMatch == nil {
- return nil
- }
- in = append(in, toMatch)
- }
- return in
-}
-
-func (conn *Connection) match(override, received Layers) bool {
- toMatch := conn.incoming(received)
- if toMatch == nil {
- return false // Not enough layers in gotLayers for matching.
- }
- if err := toMatch.merge(override); err != nil {
- return false // Failing to merge is not matching.
- }
- return toMatch.match(received)
-}
-
-// Close frees associated resources held by the Connection.
-func (conn *Connection) Close() {
- errs := multierr.Combine(conn.sniffer.close(), conn.injector.close())
- for _, s := range conn.layerStates {
- if err := s.close(); err != nil {
- errs = multierr.Append(errs, fmt.Errorf("unable to close %+v: %s", s, err))
- }
- }
- if errs != nil {
- conn.t.Fatalf("unable to close %+v: %s", conn, errs)
- }
-}
-
-// CreateFrame builds a frame for the connection with layer overriding defaults
-// of the innermost layer and additionalLayers added after it.
-func (conn *Connection) CreateFrame(layer Layer, additionalLayers ...Layer) Layers {
- var layersToSend Layers
- for _, s := range conn.layerStates {
- layersToSend = append(layersToSend, s.outgoing())
- }
- if err := layersToSend[len(layersToSend)-1].merge(layer); err != nil {
- conn.t.Fatalf("can't merge %+v into %+v: %s", layer, layersToSend[len(layersToSend)-1], err)
- }
- layersToSend = append(layersToSend, additionalLayers...)
- return layersToSend
-}
-
-// SendFrame sends a frame on the wire and updates the state of all layers.
-func (conn *Connection) SendFrame(frame Layers) {
- outBytes, err := frame.ToBytes()
- if err != nil {
- conn.t.Fatalf("can't build outgoing packet: %s", err)
- }
- conn.injector.Send(outBytes)
-
- // frame might have nil values where the caller wanted to use default values.
- // sentFrame will have no nil values in it because it comes from parsing the
- // bytes that were actually sent.
- sentFrame := parse(parseEther, outBytes)
- // Update the state of each layer based on what was sent.
- for i, s := range conn.layerStates {
- if err := s.sent(sentFrame[i]); err != nil {
- conn.t.Fatalf("Unable to update the state of %+v with %s: %s", s, sentFrame[i], err)
- }
- }
-}
-
-// Send a packet with reasonable defaults. Potentially override the final layer
-// in the connection with the provided layer and add additionLayers.
-func (conn *Connection) Send(layer Layer, additionalLayers ...Layer) {
- conn.SendFrame(conn.CreateFrame(layer, additionalLayers...))
-}
-
-// recvFrame gets the next successfully parsed frame (of type Layers) within the
-// timeout provided. If no parsable frame arrives before the timeout, it returns
-// nil.
-func (conn *Connection) recvFrame(timeout time.Duration) Layers {
- if timeout <= 0 {
- return nil
- }
- b := conn.sniffer.Recv(timeout)
- if b == nil {
- return nil
- }
- return parse(parseEther, b)
-}
-
-// layersError stores the Layers that we got and the Layers that we wanted to
-// match.
-type layersError struct {
- got, want Layers
-}
-
-func (e *layersError) Error() string {
- return e.got.diff(e.want)
-}
-
-// Expect expects a frame with the final layerStates layer matching the
-// provided Layer within the timeout specified. If it doesn't arrive in time,
-// an error is returned.
-func (conn *Connection) Expect(layer Layer, timeout time.Duration) (Layer, error) {
- // Make a frame that will ignore all but the final layer.
- layers := make([]Layer, len(conn.layerStates))
- layers[len(layers)-1] = layer
-
- gotFrame, err := conn.ExpectFrame(layers, timeout)
- if err != nil {
- return nil, err
- }
- if len(conn.layerStates)-1 < len(gotFrame) {
- return gotFrame[len(conn.layerStates)-1], nil
- }
- conn.t.Fatal("the received frame should be at least as long as the expected layers")
- panic("unreachable")
-}
-
-// ExpectFrame expects a frame that matches the provided Layers within the
-// timeout specified. If one arrives in time, the Layers is returned without an
-// error. If it doesn't arrive in time, it returns nil and error is non-nil.
-func (conn *Connection) ExpectFrame(layers Layers, timeout time.Duration) (Layers, error) {
- deadline := time.Now().Add(timeout)
- var errs error
- for {
- var gotLayers Layers
- if timeout = time.Until(deadline); timeout > 0 {
- gotLayers = conn.recvFrame(timeout)
- }
- if gotLayers == nil {
- if errs == nil {
- return nil, fmt.Errorf("got no frames matching %v during %s", layers, timeout)
- }
- return nil, fmt.Errorf("got no frames matching %v during %s: got %w", layers, timeout, errs)
- }
- if conn.match(layers, gotLayers) {
- for i, s := range conn.layerStates {
- if err := s.received(gotLayers[i]); err != nil {
- conn.t.Fatal(err)
- }
- }
- return gotLayers, nil
- }
- errs = multierr.Combine(errs, &layersError{got: gotLayers, want: conn.incoming(gotLayers)})
- }
-}
-
-// Drain drains the sniffer's receive buffer by receiving packets until there's
-// nothing else to receive.
-func (conn *Connection) Drain() {
- conn.sniffer.Drain()
-}
-
-// TCPIPv4 maintains the state for all the layers in a TCP/IPv4 connection.
-type TCPIPv4 Connection
-
-// NewTCPIPv4 creates a new TCPIPv4 connection with reasonable defaults.
-func NewTCPIPv4(t *testing.T, outgoingTCP, incomingTCP TCP) TCPIPv4 {
- etherState, err := newEtherState(Ether{}, Ether{})
- if err != nil {
- t.Fatalf("can't make etherState: %s", err)
- }
- ipv4State, err := newIPv4State(IPv4{}, IPv4{})
- if err != nil {
- t.Fatalf("can't make ipv4State: %s", err)
- }
- tcpState, err := newTCPState(unix.AF_INET, outgoingTCP, incomingTCP)
- if err != nil {
- t.Fatalf("can't make tcpState: %s", err)
- }
- injector, err := NewInjector(t)
- if err != nil {
- t.Fatalf("can't make injector: %s", err)
- }
- sniffer, err := NewSniffer(t)
- if err != nil {
- t.Fatalf("can't make sniffer: %s", err)
- }
-
- return TCPIPv4{
- layerStates: []layerState{etherState, ipv4State, tcpState},
- injector: injector,
- sniffer: sniffer,
- t: t,
- }
-}
-
-// Handshake performs a TCP 3-way handshake. The input Connection should have a
-// final TCP Layer.
-func (conn *TCPIPv4) Handshake() {
- // Send the SYN.
- conn.Send(TCP{Flags: Uint8(header.TCPFlagSyn)})
-
- // Wait for the SYN-ACK.
- synAck, err := conn.Expect(TCP{Flags: Uint8(header.TCPFlagSyn | header.TCPFlagAck)}, time.Second)
- if synAck == nil {
- conn.t.Fatalf("didn't get synack during handshake: %s", err)
- }
- conn.layerStates[len(conn.layerStates)-1].(*tcpState).synAck = synAck
-
- // Send an ACK.
- conn.Send(TCP{Flags: Uint8(header.TCPFlagAck)})
-}
-
-// ExpectData is a convenient method that expects a Layer and the Layer after
-// it. If it doens't arrive in time, it returns nil.
-func (conn *TCPIPv4) ExpectData(tcp *TCP, payload *Payload, timeout time.Duration) (Layers, error) {
- expected := make([]Layer, len(conn.layerStates))
- expected[len(expected)-1] = tcp
- if payload != nil {
- expected = append(expected, payload)
- }
- return (*Connection)(conn).ExpectFrame(expected, timeout)
-}
-
-// Send a packet with reasonable defaults. Potentially override the TCP layer in
-// the connection with the provided layer and add additionLayers.
-func (conn *TCPIPv4) Send(tcp TCP, additionalLayers ...Layer) {
- (*Connection)(conn).Send(&tcp, additionalLayers...)
-}
-
-// Close frees associated resources held by the TCPIPv4 connection.
-func (conn *TCPIPv4) Close() {
- (*Connection)(conn).Close()
-}
-
-// Expect expects a frame with the TCP layer matching the provided TCP within
-// the timeout specified. If it doesn't arrive in time, an error is returned.
-func (conn *TCPIPv4) Expect(tcp TCP, timeout time.Duration) (*TCP, error) {
- layer, err := (*Connection)(conn).Expect(&tcp, timeout)
- if layer == nil {
- return nil, err
- }
- gotTCP, ok := layer.(*TCP)
- if !ok {
- conn.t.Fatalf("expected %s to be TCP", layer)
- }
- return gotTCP, err
-}
-
-func (conn *TCPIPv4) state() *tcpState {
- state, ok := conn.layerStates[len(conn.layerStates)-1].(*tcpState)
- if !ok {
- conn.t.Fatalf("expected final state of %v to be tcpState", conn.layerStates)
- }
- return state
-}
-
-// RemoteSeqNum returns the next expected sequence number from the DUT.
-func (conn *TCPIPv4) RemoteSeqNum() *seqnum.Value {
- return conn.state().remoteSeqNum
-}
-
-// LocalSeqNum returns the next sequence number to send from the testbench.
-func (conn *TCPIPv4) LocalSeqNum() *seqnum.Value {
- return conn.state().localSeqNum
-}
-
-// SynAck returns the SynAck that was part of the handshake.
-func (conn *TCPIPv4) SynAck() *TCP {
- return conn.state().synAck
-}
-
-// IPv6Conn maintains the state for all the layers in a IPv6 connection.
-type IPv6Conn Connection
-
-// NewIPv6Conn creates a new IPv6Conn connection with reasonable defaults.
-func NewIPv6Conn(t *testing.T, outgoingIPv6, incomingIPv6 IPv6) IPv6Conn {
- etherState, err := newEtherState(Ether{}, Ether{})
- if err != nil {
- t.Fatalf("can't make EtherState: %s", err)
- }
- ipv6State, err := newIPv6State(outgoingIPv6, incomingIPv6)
- if err != nil {
- t.Fatalf("can't make IPv6State: %s", err)
- }
-
- injector, err := NewInjector(t)
- if err != nil {
- t.Fatalf("can't make injector: %s", err)
- }
- sniffer, err := NewSniffer(t)
- if err != nil {
- t.Fatalf("can't make sniffer: %s", err)
- }
-
- return IPv6Conn{
- layerStates: []layerState{etherState, ipv6State},
- injector: injector,
- sniffer: sniffer,
- t: t,
- }
-}
-
-// SendFrame sends a frame on the wire and updates the state of all layers.
-func (conn *IPv6Conn) SendFrame(frame Layers) {
- (*Connection)(conn).SendFrame(frame)
-}
-
-// CreateFrame builds a frame for the connection with ipv6 overriding the ipv6
-// layer defaults and additionalLayers added after it.
-func (conn *IPv6Conn) CreateFrame(ipv6 IPv6, additionalLayers ...Layer) Layers {
- return (*Connection)(conn).CreateFrame(&ipv6, additionalLayers...)
-}
-
-// Close to clean up any resources held.
-func (conn *IPv6Conn) Close() {
- (*Connection)(conn).Close()
-}
-
-// ExpectFrame expects a frame that matches the provided Layers within the
-// timeout specified. If it doesn't arrive in time, an error is returned.
-func (conn *IPv6Conn) ExpectFrame(frame Layers, timeout time.Duration) (Layers, error) {
- return (*Connection)(conn).ExpectFrame(frame, timeout)
-}
-
-// Drain drains the sniffer's receive buffer by receiving packets until there's
-// nothing else to receive.
-func (conn *TCPIPv4) Drain() {
- conn.sniffer.Drain()
-}
-
-// UDPIPv4 maintains the state for all the layers in a UDP/IPv4 connection.
-type UDPIPv4 Connection
-
-// NewUDPIPv4 creates a new UDPIPv4 connection with reasonable defaults.
-func NewUDPIPv4(t *testing.T, outgoingUDP, incomingUDP UDP) UDPIPv4 {
- etherState, err := newEtherState(Ether{}, Ether{})
- if err != nil {
- t.Fatalf("can't make etherState: %s", err)
- }
- ipv4State, err := newIPv4State(IPv4{}, IPv4{})
- if err != nil {
- t.Fatalf("can't make ipv4State: %s", err)
- }
- udpState, localAddr, err := newUDPState(unix.AF_INET, outgoingUDP, incomingUDP)
- if err != nil {
- t.Fatalf("can't make udpState: %s", err)
- }
- injector, err := NewInjector(t)
- if err != nil {
- t.Fatalf("can't make injector: %s", err)
- }
- sniffer, err := NewSniffer(t)
- if err != nil {
- t.Fatalf("can't make sniffer: %s", err)
- }
-
- return UDPIPv4{
- layerStates: []layerState{etherState, ipv4State, udpState},
- injector: injector,
- sniffer: sniffer,
- localAddr: localAddr,
- t: t,
- }
-}
-
-// LocalAddr gets the local socket address of this connection.
-func (conn *UDPIPv4) LocalAddr() unix.Sockaddr {
- return conn.localAddr
-}
-
-// CreateFrame builds a frame for the connection with layer overriding defaults
-// of the innermost layer and additionalLayers added after it.
-func (conn *UDPIPv4) CreateFrame(layer Layer, additionalLayers ...Layer) Layers {
- return (*Connection)(conn).CreateFrame(layer, additionalLayers...)
-}
-
-// Send a packet with reasonable defaults. Potentially override the UDP layer in
-// the connection with the provided layer and add additionLayers.
-func (conn *UDPIPv4) Send(udp UDP, additionalLayers ...Layer) {
- (*Connection)(conn).Send(&udp, additionalLayers...)
-}
-
-// SendFrame sends a frame on the wire and updates the state of all layers.
-func (conn *UDPIPv4) SendFrame(frame Layers) {
- (*Connection)(conn).SendFrame(frame)
-}
-
-// SendIP sends a packet with additionalLayers following the IP layer in the
-// connection.
-func (conn *UDPIPv4) SendIP(additionalLayers ...Layer) {
- var layersToSend Layers
- for _, s := range conn.layerStates[:len(conn.layerStates)-1] {
- layersToSend = append(layersToSend, s.outgoing())
- }
- layersToSend = append(layersToSend, additionalLayers...)
- conn.SendFrame(layersToSend)
-}
-
-// Expect expects a frame with the UDP layer matching the provided UDP within
-// the timeout specified. If it doesn't arrive in time, an error is returned.
-func (conn *UDPIPv4) Expect(udp UDP, timeout time.Duration) (*UDP, error) {
- conn.t.Helper()
- layer, err := (*Connection)(conn).Expect(&udp, timeout)
- if layer == nil {
- return nil, err
- }
- gotUDP, ok := layer.(*UDP)
- if !ok {
- conn.t.Fatalf("expected %s to be UDP", layer)
- }
- return gotUDP, err
-}
-
-// ExpectData is a convenient method that expects a Layer and the Layer after
-// it. If it doens't arrive in time, it returns nil.
-func (conn *UDPIPv4) ExpectData(udp UDP, payload Payload, timeout time.Duration) (Layers, error) {
- conn.t.Helper()
- expected := make([]Layer, len(conn.layerStates))
- expected[len(expected)-1] = &udp
- if payload.length() != 0 {
- expected = append(expected, &payload)
- }
- return (*Connection)(conn).ExpectFrame(expected, timeout)
-}
-
-// Close frees associated resources held by the UDPIPv4 connection.
-func (conn *UDPIPv4) Close() {
- (*Connection)(conn).Close()
-}
-
-// Drain drains the sniffer's receive buffer by receiving packets until there's
-// nothing else to receive.
-func (conn *UDPIPv4) Drain() {
- conn.sniffer.Drain()
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 12:52:34 +0000