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-rw-r--r--pkg/tcpip/stack/transport_test.go4
-rw-r--r--pkg/tcpip/tcpip.go4
-rw-r--r--pkg/tcpip/transport/icmp/BUILD1
-rw-r--r--pkg/tcpip/transport/icmp/endpoint.go6
-rw-r--r--pkg/tcpip/transport/raw/endpoint.go5
-rw-r--r--pkg/tcpip/transport/tcp/accept.go12
-rw-r--r--pkg/tcpip/transport/tcp/connect.go26
-rw-r--r--pkg/tcpip/transport/tcp/endpoint.go174
-rw-r--r--pkg/tcpip/transport/tcp/endpoint_state.go42
-rw-r--r--pkg/tcpip/transport/tcp/rcv.go37
-rw-r--r--pkg/tcpip/transport/tcp/snd.go4
-rw-r--r--pkg/tcpip/transport/tcp/tcp_test.go131
-rw-r--r--pkg/tcpip/transport/tcp/testing/context/context.go39
-rw-r--r--pkg/tcpip/transport/udp/endpoint.go6
14 files changed, 383 insertions, 108 deletions
diff --git a/pkg/tcpip/stack/transport_test.go b/pkg/tcpip/stack/transport_test.go
index 8d74f1543..e8a9392b5 100644
--- a/pkg/tcpip/stack/transport_test.go
+++ b/pkg/tcpip/stack/transport_test.go
@@ -188,6 +188,10 @@ func (f *fakeTransportEndpoint) HandleControlPacket(stack.TransportEndpointID, s
f.proto.controlCount++
}
+func (f *fakeTransportEndpoint) State() uint32 {
+ return 0
+}
+
type fakeTransportGoodOption bool
type fakeTransportBadOption bool
diff --git a/pkg/tcpip/tcpip.go b/pkg/tcpip/tcpip.go
index f9886c6e4..85ef014d0 100644
--- a/pkg/tcpip/tcpip.go
+++ b/pkg/tcpip/tcpip.go
@@ -377,6 +377,10 @@ type Endpoint interface {
// GetSockOpt gets a socket option. opt should be a pointer to one of the
// *Option types.
GetSockOpt(opt interface{}) *Error
+
+ // State returns a socket's lifecycle state. The returned value is
+ // protocol-specific and is primarily used for diagnostics.
+ State() uint32
}
// WriteOptions contains options for Endpoint.Write.
diff --git a/pkg/tcpip/transport/icmp/BUILD b/pkg/tcpip/transport/icmp/BUILD
index 9aa6f3978..84a2b53b7 100644
--- a/pkg/tcpip/transport/icmp/BUILD
+++ b/pkg/tcpip/transport/icmp/BUILD
@@ -33,6 +33,7 @@ go_library(
"//pkg/tcpip/header",
"//pkg/tcpip/stack",
"//pkg/tcpip/transport/raw",
+ "//pkg/tcpip/transport/tcp",
"//pkg/waiter",
],
)
diff --git a/pkg/tcpip/transport/icmp/endpoint.go b/pkg/tcpip/transport/icmp/endpoint.go
index e2b90ef10..b8005093a 100644
--- a/pkg/tcpip/transport/icmp/endpoint.go
+++ b/pkg/tcpip/transport/icmp/endpoint.go
@@ -708,3 +708,9 @@ func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, vv
// HandleControlPacket implements stack.TransportEndpoint.HandleControlPacket.
func (e *endpoint) HandleControlPacket(id stack.TransportEndpointID, typ stack.ControlType, extra uint32, vv buffer.VectorisedView) {
}
+
+// State implements tcpip.Endpoint.State. The ICMP endpoint currently doesn't
+// expose internal socket state.
+func (e *endpoint) State() uint32 {
+ return 0
+}
diff --git a/pkg/tcpip/transport/raw/endpoint.go b/pkg/tcpip/transport/raw/endpoint.go
index 1daf5823f..e4ff50c91 100644
--- a/pkg/tcpip/transport/raw/endpoint.go
+++ b/pkg/tcpip/transport/raw/endpoint.go
@@ -519,3 +519,8 @@ func (ep *endpoint) HandlePacket(route *stack.Route, netHeader buffer.View, vv b
ep.waiterQueue.Notify(waiter.EventIn)
}
}
+
+// State implements socket.Socket.State.
+func (ep *endpoint) State() uint32 {
+ return 0
+}
diff --git a/pkg/tcpip/transport/tcp/accept.go b/pkg/tcpip/transport/tcp/accept.go
index 31e365ae5..a32e20b06 100644
--- a/pkg/tcpip/transport/tcp/accept.go
+++ b/pkg/tcpip/transport/tcp/accept.go
@@ -226,7 +226,6 @@ func (l *listenContext) createConnectingEndpoint(s *segment, iss seqnum.Value, i
}
n.isRegistered = true
- n.state = stateConnecting
// Create sender and receiver.
//
@@ -258,8 +257,9 @@ func (l *listenContext) createEndpointAndPerformHandshake(s *segment, opts *head
ep.Close()
return nil, err
}
-
- ep.state = stateConnected
+ ep.mu.Lock()
+ ep.state = StateEstablished
+ ep.mu.Unlock()
// Update the receive window scaling. We can't do it before the
// handshake because it's possible that the peer doesn't support window
@@ -276,7 +276,7 @@ func (e *endpoint) deliverAccepted(n *endpoint) {
e.mu.RLock()
state := e.state
e.mu.RUnlock()
- if state == stateListen {
+ if state == StateListen {
e.acceptedChan <- n
e.waiterQueue.Notify(waiter.EventIn)
} else {
@@ -406,7 +406,7 @@ func (e *endpoint) handleListenSegment(ctx *listenContext, s *segment) {
n.tsOffset = 0
// Switch state to connected.
- n.state = stateConnected
+ n.state = StateEstablished
// Do the delivery in a separate goroutine so
// that we don't block the listen loop in case
@@ -429,7 +429,7 @@ func (e *endpoint) protocolListenLoop(rcvWnd seqnum.Size) *tcpip.Error {
// handleSynSegment() from attempting to queue new connections
// to the endpoint.
e.mu.Lock()
- e.state = stateClosed
+ e.state = StateClose
// Do cleanup if needed.
e.completeWorkerLocked()
diff --git a/pkg/tcpip/transport/tcp/connect.go b/pkg/tcpip/transport/tcp/connect.go
index 371d2ed29..0ad7bfb38 100644
--- a/pkg/tcpip/transport/tcp/connect.go
+++ b/pkg/tcpip/transport/tcp/connect.go
@@ -151,6 +151,9 @@ func (h *handshake) resetToSynRcvd(iss seqnum.Value, irs seqnum.Value, opts *hea
h.mss = opts.MSS
h.sndWndScale = opts.WS
h.listenEP = listenEP
+ h.ep.mu.Lock()
+ h.ep.state = StateSynRecv
+ h.ep.mu.Unlock()
}
// checkAck checks if the ACK number, if present, of a segment received during
@@ -219,6 +222,9 @@ func (h *handshake) synSentState(s *segment) *tcpip.Error {
// but resend our own SYN and wait for it to be acknowledged in the
// SYN-RCVD state.
h.state = handshakeSynRcvd
+ h.ep.mu.Lock()
+ h.ep.state = StateSynRecv
+ h.ep.mu.Unlock()
synOpts := header.TCPSynOptions{
WS: h.rcvWndScale,
TS: rcvSynOpts.TS,
@@ -668,7 +674,7 @@ func (e *endpoint) makeOptions(sackBlocks []header.SACKBlock) []byte {
// sendRaw sends a TCP segment to the endpoint's peer.
func (e *endpoint) sendRaw(data buffer.VectorisedView, flags byte, seq, ack seqnum.Value, rcvWnd seqnum.Size) *tcpip.Error {
var sackBlocks []header.SACKBlock
- if e.state == stateConnected && e.rcv.pendingBufSize > 0 && (flags&header.TCPFlagAck != 0) {
+ if e.state == StateEstablished && e.rcv.pendingBufSize > 0 && (flags&header.TCPFlagAck != 0) {
sackBlocks = e.sack.Blocks[:e.sack.NumBlocks]
}
options := e.makeOptions(sackBlocks)
@@ -719,8 +725,7 @@ func (e *endpoint) handleClose() *tcpip.Error {
// protocol goroutine.
func (e *endpoint) resetConnectionLocked(err *tcpip.Error) {
e.sendRaw(buffer.VectorisedView{}, header.TCPFlagAck|header.TCPFlagRst, e.snd.sndUna, e.rcv.rcvNxt, 0)
-
- e.state = stateError
+ e.state = StateError
e.hardError = err
}
@@ -876,14 +881,19 @@ func (e *endpoint) protocolMainLoop(handshake bool) *tcpip.Error {
// handshake, and then inform potential waiters about its
// completion.
h := newHandshake(e, seqnum.Size(e.receiveBufferAvailable()))
+ e.mu.Lock()
+ h.ep.state = StateSynSent
+ e.mu.Unlock()
+
if err := h.execute(); err != nil {
e.lastErrorMu.Lock()
e.lastError = err
e.lastErrorMu.Unlock()
e.mu.Lock()
- e.state = stateError
+ e.state = StateError
e.hardError = err
+
// Lock released below.
epilogue()
@@ -905,7 +915,7 @@ func (e *endpoint) protocolMainLoop(handshake bool) *tcpip.Error {
// Tell waiters that the endpoint is connected and writable.
e.mu.Lock()
- e.state = stateConnected
+ e.state = StateEstablished
drained := e.drainDone != nil
e.mu.Unlock()
if drained {
@@ -1005,7 +1015,7 @@ func (e *endpoint) protocolMainLoop(handshake bool) *tcpip.Error {
return err
}
}
- if e.state != stateError {
+ if e.state != StateError {
close(e.drainDone)
<-e.undrain
}
@@ -1061,8 +1071,8 @@ func (e *endpoint) protocolMainLoop(handshake bool) *tcpip.Error {
// Mark endpoint as closed.
e.mu.Lock()
- if e.state != stateError {
- e.state = stateClosed
+ if e.state != StateError {
+ e.state = StateClose
}
// Lock released below.
epilogue()
diff --git a/pkg/tcpip/transport/tcp/endpoint.go b/pkg/tcpip/transport/tcp/endpoint.go
index fd697402e..23422ca5e 100644
--- a/pkg/tcpip/transport/tcp/endpoint.go
+++ b/pkg/tcpip/transport/tcp/endpoint.go
@@ -32,18 +32,81 @@ import (
"gvisor.googlesource.com/gvisor/pkg/waiter"
)
-type endpointState int
+// EndpointState represents the state of a TCP endpoint.
+type EndpointState uint32
+// Endpoint states. Note that are represented in a netstack-specific manner and
+// may not be meaningful externally. Specifically, they need to be translated to
+// Linux's representation for these states if presented to userspace.
const (
- stateInitial endpointState = iota
- stateBound
- stateListen
- stateConnecting
- stateConnected
- stateClosed
- stateError
+ // Endpoint states internal to netstack. These map to the TCP state CLOSED.
+ StateInitial EndpointState = iota
+ StateBound
+ StateConnecting // Connect() called, but the initial SYN hasn't been sent.
+ StateError
+
+ // TCP protocol states.
+ StateEstablished
+ StateSynSent
+ StateSynRecv
+ StateFinWait1
+ StateFinWait2
+ StateTimeWait
+ StateClose
+ StateCloseWait
+ StateLastAck
+ StateListen
+ StateClosing
)
+// connected is the set of states where an endpoint is connected to a peer.
+func (s EndpointState) connected() bool {
+ switch s {
+ case StateEstablished, StateFinWait1, StateFinWait2, StateTimeWait, StateCloseWait, StateLastAck, StateClosing:
+ return true
+ default:
+ return false
+ }
+}
+
+// String implements fmt.Stringer.String.
+func (s EndpointState) String() string {
+ switch s {
+ case StateInitial:
+ return "INITIAL"
+ case StateBound:
+ return "BOUND"
+ case StateConnecting:
+ return "CONNECTING"
+ case StateError:
+ return "ERROR"
+ case StateEstablished:
+ return "ESTABLISHED"
+ case StateSynSent:
+ return "SYN-SENT"
+ case StateSynRecv:
+ return "SYN-RCVD"
+ case StateFinWait1:
+ return "FIN-WAIT1"
+ case StateFinWait2:
+ return "FIN-WAIT2"
+ case StateTimeWait:
+ return "TIME-WAIT"
+ case StateClose:
+ return "CLOSED"
+ case StateCloseWait:
+ return "CLOSE-WAIT"
+ case StateLastAck:
+ return "LAST-ACK"
+ case StateListen:
+ return "LISTEN"
+ case StateClosing:
+ return "CLOSING"
+ default:
+ panic("unreachable")
+ }
+}
+
// Reasons for notifying the protocol goroutine.
const (
notifyNonZeroReceiveWindow = 1 << iota
@@ -108,10 +171,14 @@ type endpoint struct {
rcvBufUsed int
// The following fields are protected by the mutex.
- mu sync.RWMutex `state:"nosave"`
- id stack.TransportEndpointID
- state endpointState `state:".(endpointState)"`
- isPortReserved bool `state:"manual"`
+ mu sync.RWMutex `state:"nosave"`
+ id stack.TransportEndpointID
+
+ // state endpointState `state:".(endpointState)"`
+ // pState ProtocolState
+ state EndpointState `state:".(EndpointState)"`
+
+ isPortReserved bool `state:"manual"`
isRegistered bool
boundNICID tcpip.NICID `state:"manual"`
route stack.Route `state:"manual"`
@@ -304,6 +371,7 @@ func newEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, waite
stack: stack,
netProto: netProto,
waiterQueue: waiterQueue,
+ state: StateInitial,
rcvBufSize: DefaultBufferSize,
sndBufSize: DefaultBufferSize,
sndMTU: int(math.MaxInt32),
@@ -351,14 +419,14 @@ func (e *endpoint) Readiness(mask waiter.EventMask) waiter.EventMask {
defer e.mu.RUnlock()
switch e.state {
- case stateInitial, stateBound, stateConnecting:
+ case StateInitial, StateBound, StateConnecting, StateSynSent, StateSynRecv:
// Ready for nothing.
- case stateClosed, stateError:
+ case StateClose, StateError:
// Ready for anything.
result = mask
- case stateListen:
+ case StateListen:
// Check if there's anything in the accepted channel.
if (mask & waiter.EventIn) != 0 {
if len(e.acceptedChan) > 0 {
@@ -366,7 +434,7 @@ func (e *endpoint) Readiness(mask waiter.EventMask) waiter.EventMask {
}
}
- case stateConnected:
+ case StateEstablished, StateFinWait1, StateFinWait2, StateTimeWait, StateCloseWait, StateLastAck, StateClosing:
// Determine if the endpoint is writable if requested.
if (mask & waiter.EventOut) != 0 {
e.sndBufMu.Lock()
@@ -427,7 +495,7 @@ func (e *endpoint) Close() {
// are immediately available for reuse after Close() is called. If also
// registered, we unregister as well otherwise the next user would fail
// in Listen() when trying to register.
- if e.state == stateListen && e.isPortReserved {
+ if e.state == StateListen && e.isPortReserved {
if e.isRegistered {
e.stack.UnregisterTransportEndpoint(e.boundNICID, e.effectiveNetProtos, ProtocolNumber, e.id, e)
e.isRegistered = false
@@ -487,15 +555,15 @@ func (e *endpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages,
e.mu.RLock()
// The endpoint can be read if it's connected, or if it's already closed
// but has some pending unread data. Also note that a RST being received
- // would cause the state to become stateError so we should allow the
+ // would cause the state to become StateError so we should allow the
// reads to proceed before returning a ECONNRESET.
e.rcvListMu.Lock()
bufUsed := e.rcvBufUsed
- if s := e.state; s != stateConnected && s != stateClosed && bufUsed == 0 {
+ if s := e.state; !s.connected() && s != StateClose && bufUsed == 0 {
e.rcvListMu.Unlock()
he := e.hardError
e.mu.RUnlock()
- if s == stateError {
+ if s == StateError {
return buffer.View{}, tcpip.ControlMessages{}, he
}
return buffer.View{}, tcpip.ControlMessages{}, tcpip.ErrInvalidEndpointState
@@ -511,7 +579,7 @@ func (e *endpoint) Read(*tcpip.FullAddress) (buffer.View, tcpip.ControlMessages,
func (e *endpoint) readLocked() (buffer.View, *tcpip.Error) {
if e.rcvBufUsed == 0 {
- if e.rcvClosed || e.state != stateConnected {
+ if e.rcvClosed || !e.state.connected() {
return buffer.View{}, tcpip.ErrClosedForReceive
}
return buffer.View{}, tcpip.ErrWouldBlock
@@ -547,9 +615,9 @@ func (e *endpoint) Write(p tcpip.Payload, opts tcpip.WriteOptions) (uintptr, <-c
defer e.mu.RUnlock()
// The endpoint cannot be written to if it's not connected.
- if e.state != stateConnected {
+ if !e.state.connected() {
switch e.state {
- case stateError:
+ case StateError:
return 0, nil, e.hardError
default:
return 0, nil, tcpip.ErrClosedForSend
@@ -612,8 +680,8 @@ func (e *endpoint) Peek(vec [][]byte) (uintptr, tcpip.ControlMessages, *tcpip.Er
// The endpoint can be read if it's connected, or if it's already closed
// but has some pending unread data.
- if s := e.state; s != stateConnected && s != stateClosed {
- if s == stateError {
+ if s := e.state; !s.connected() && s != StateClose {
+ if s == StateError {
return 0, tcpip.ControlMessages{}, e.hardError
}
return 0, tcpip.ControlMessages{}, tcpip.ErrInvalidEndpointState
@@ -623,7 +691,7 @@ func (e *endpoint) Peek(vec [][]byte) (uintptr, tcpip.ControlMessages, *tcpip.Er
defer e.rcvListMu.Unlock()
if e.rcvBufUsed == 0 {
- if e.rcvClosed || e.state != stateConnected {
+ if e.rcvClosed || !e.state.connected() {
return 0, tcpip.ControlMessages{}, tcpip.ErrClosedForReceive
}
return 0, tcpip.ControlMessages{}, tcpip.ErrWouldBlock
@@ -789,7 +857,7 @@ func (e *endpoint) SetSockOpt(opt interface{}) *tcpip.Error {
defer e.mu.Unlock()
// We only allow this to be set when we're in the initial state.
- if e.state != stateInitial {
+ if e.state != StateInitial {
return tcpip.ErrInvalidEndpointState
}
@@ -841,7 +909,7 @@ func (e *endpoint) readyReceiveSize() (int, *tcpip.Error) {
defer e.mu.RUnlock()
// The endpoint cannot be in listen state.
- if e.state == stateListen {
+ if e.state == StateListen {
return 0, tcpip.ErrInvalidEndpointState
}
@@ -1057,7 +1125,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) (er
nicid := addr.NIC
switch e.state {
- case stateBound:
+ case StateBound:
// If we're already bound to a NIC but the caller is requesting
// that we use a different one now, we cannot proceed.
if e.boundNICID == 0 {
@@ -1070,16 +1138,16 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) (er
nicid = e.boundNICID
- case stateInitial:
- // Nothing to do. We'll eventually fill-in the gaps in the ID
- // (if any) when we find a route.
+ case StateInitial:
+ // Nothing to do. We'll eventually fill-in the gaps in the ID (if any)
+ // when we find a route.
- case stateConnecting:
- // A connection request has already been issued but hasn't
- // completed yet.
+ case StateConnecting, StateSynSent, StateSynRecv:
+ // A connection request has already been issued but hasn't completed
+ // yet.
return tcpip.ErrAlreadyConnecting
- case stateConnected:
+ case StateEstablished:
// The endpoint is already connected. If caller hasn't been notified yet, return success.
if !e.isConnectNotified {
e.isConnectNotified = true
@@ -1088,7 +1156,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) (er
// Otherwise return that it's already connected.
return tcpip.ErrAlreadyConnected
- case stateError:
+ case StateError:
return e.hardError
default:
@@ -1154,7 +1222,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) (er
}
e.isRegistered = true
- e.state = stateConnecting
+ e.state = StateConnecting
e.route = r.Clone()
e.boundNICID = nicid
e.effectiveNetProtos = netProtos
@@ -1175,7 +1243,7 @@ func (e *endpoint) connect(addr tcpip.FullAddress, handshake bool, run bool) (er
}
e.segmentQueue.mu.Unlock()
e.snd.updateMaxPayloadSize(int(e.route.MTU()), 0)
- e.state = stateConnected
+ e.state = StateEstablished
}
if run {
@@ -1199,8 +1267,8 @@ func (e *endpoint) Shutdown(flags tcpip.ShutdownFlags) *tcpip.Error {
defer e.mu.Unlock()
e.shutdownFlags |= flags
- switch e.state {
- case stateConnected:
+ switch {
+ case e.state.connected():
// Close for read.
if (e.shutdownFlags & tcpip.ShutdownRead) != 0 {
// Mark read side as closed.
@@ -1241,7 +1309,7 @@ func (e *endpoint) Shutdown(flags tcpip.ShutdownFlags) *tcpip.Error {
e.sndCloseWaker.Assert()
}
- case stateListen:
+ case e.state == StateListen:
// Tell protocolListenLoop to stop.
if flags&tcpip.ShutdownRead != 0 {
e.notifyProtocolGoroutine(notifyClose)
@@ -1269,7 +1337,7 @@ func (e *endpoint) Listen(backlog int) (err *tcpip.Error) {
// When the endpoint shuts down, it sets workerCleanup to true, and from
// that point onward, acceptedChan is the responsibility of the cleanup()
// method (and should not be touched anywhere else, including here).
- if e.state == stateListen && !e.workerCleanup {
+ if e.state == StateListen && !e.workerCleanup {
// Adjust the size of the channel iff we can fix existing
// pending connections into the new one.
if len(e.acceptedChan) > backlog {
@@ -1288,7 +1356,7 @@ func (e *endpoint) Listen(backlog int) (err *tcpip.Error) {
}
// Endpoint must be bound before it can transition to listen mode.
- if e.state != stateBound {
+ if e.state != StateBound {
return tcpip.ErrInvalidEndpointState
}
@@ -1298,7 +1366,7 @@ func (e *endpoint) Listen(backlog int) (err *tcpip.Error) {
}
e.isRegistered = true
- e.state = stateListen
+ e.state = StateListen
if e.acceptedChan == nil {
e.acceptedChan = make(chan *endpoint, backlog)
}
@@ -1325,7 +1393,7 @@ func (e *endpoint) Accept() (tcpip.Endpoint, *waiter.Queue, *tcpip.Error) {
defer e.mu.RUnlock()
// Endpoint must be in listen state before it can accept connections.
- if e.state != stateListen {
+ if e.state != StateListen {
return nil, nil, tcpip.ErrInvalidEndpointState
}
@@ -1353,7 +1421,7 @@ func (e *endpoint) Bind(addr tcpip.FullAddress) (err *tcpip.Error) {
// Don't allow binding once endpoint is not in the initial state
// anymore. This is because once the endpoint goes into a connected or
// listen state, it is already bound.
- if e.state != stateInitial {
+ if e.state != StateInitial {
return tcpip.ErrAlreadyBound
}
@@ -1408,7 +1476,7 @@ func (e *endpoint) Bind(addr tcpip.FullAddress) (err *tcpip.Error) {
}
// Mark endpoint as bound.
- e.state = stateBound
+ e.state = StateBound
return nil
}
@@ -1430,7 +1498,7 @@ func (e *endpoint) GetRemoteAddress() (tcpip.FullAddress, *tcpip.Error) {
e.mu.RLock()
defer e.mu.RUnlock()
- if e.state != stateConnected {
+ if !e.state.connected() {
return tcpip.FullAddress{}, tcpip.ErrNotConnected
}
@@ -1739,3 +1807,11 @@ func (e *endpoint) initGSO() {
gso.MaxSize = e.route.GSOMaxSize()
e.gso = gso
}
+
+// State implements tcpip.Endpoint.State. It exports the endpoint's protocol
+// state for diagnostics.
+func (e *endpoint) State() uint32 {
+ e.mu.Lock()
+ defer e.mu.Unlock()
+ return uint32(e.state)
+}
diff --git a/pkg/tcpip/transport/tcp/endpoint_state.go b/pkg/tcpip/transport/tcp/endpoint_state.go
index e8aed2875..5f30c2374 100644
--- a/pkg/tcpip/transport/tcp/endpoint_state.go
+++ b/pkg/tcpip/transport/tcp/endpoint_state.go
@@ -49,8 +49,8 @@ func (e *endpoint) beforeSave() {
defer e.mu.Unlock()
switch e.state {
- case stateInitial, stateBound:
- case stateConnected:
+ case StateInitial, StateBound:
+ case StateEstablished, StateSynSent, StateSynRecv, StateFinWait1, StateFinWait2, StateTimeWait, StateCloseWait, StateLastAck, StateClosing:
if e.route.Capabilities()&stack.CapabilitySaveRestore == 0 {
if e.route.Capabilities()&stack.CapabilityDisconnectOk == 0 {
panic(tcpip.ErrSaveRejection{fmt.Errorf("endpoint cannot be saved in connected state: local %v:%d, remote %v:%d", e.id.LocalAddress, e.id.LocalPort, e.id.RemoteAddress, e.id.RemotePort)})
@@ -66,17 +66,17 @@ func (e *endpoint) beforeSave() {
break
}
fallthrough
- case stateListen, stateConnecting:
+ case StateListen, StateConnecting:
e.drainSegmentLocked()
- if e.state != stateClosed && e.state != stateError {
+ if e.state != StateClose && e.state != StateError {
if !e.workerRunning {
panic("endpoint has no worker running in listen, connecting, or connected state")
}
break
}
fallthrough
- case stateError, stateClosed:
- for e.state == stateError && e.workerRunning {
+ case StateError, StateClose:
+ for e.state == StateError && e.workerRunning {
e.mu.Unlock()
time.Sleep(100 * time.Millisecond)
e.mu.Lock()
@@ -92,7 +92,7 @@ func (e *endpoint) beforeSave() {
panic("endpoint still has waiters upon save")
}
- if e.state != stateClosed && !((e.state == stateBound || e.state == stateListen) == e.isPortReserved) {
+ if e.state != StateClose && !((e.state == StateBound || e.state == StateListen) == e.isPortReserved) {
panic("endpoints which are not in the closed state must have a reserved port IFF they are in bound or listen state")
}
}
@@ -132,7 +132,7 @@ func (e *endpoint) loadAcceptedChan(acceptedEndpoints []*endpoint) {
}
// saveState is invoked by stateify.
-func (e *endpoint) saveState() endpointState {
+func (e *endpoint) saveState() EndpointState {
return e.state
}
@@ -146,15 +146,15 @@ var connectingLoading sync.WaitGroup
// Bound endpoint loading happens last.
// loadState is invoked by stateify.
-func (e *endpoint) loadState(state endpointState) {
+func (e *endpoint) loadState(state EndpointState) {
// This is to ensure that the loading wait groups include all applicable
// endpoints before any asynchronous calls to the Wait() methods.
switch state {
- case stateConnected:
+ case StateEstablished, StateFinWait1, StateFinWait2, StateTimeWait, StateCloseWait, StateLastAck, StateClosing:
connectedLoading.Add(1)
- case stateListen:
+ case StateListen:
listenLoading.Add(1)
- case stateConnecting:
+ case StateConnecting, StateSynSent, StateSynRecv:
connectingLoading.Add(1)
}
e.state = state
@@ -168,7 +168,7 @@ func (e *endpoint) afterLoad() {
state := e.state
switch state {
- case stateInitial, stateBound, stateListen, stateConnecting, stateConnected:
+ case StateInitial, StateBound, StateListen, StateConnecting, StateEstablished:
var ss SendBufferSizeOption
if err := e.stack.TransportProtocolOption(ProtocolNumber, &ss); err == nil {
if e.sndBufSize < ss.Min || e.sndBufSize > ss.Max {
@@ -181,7 +181,7 @@ func (e *endpoint) afterLoad() {
}
bind := func() {
- e.state = stateInitial
+ e.state = StateInitial
if len(e.bindAddress) == 0 {
e.bindAddress = e.id.LocalAddress
}
@@ -191,7 +191,7 @@ func (e *endpoint) afterLoad() {
}
switch state {
- case stateConnected:
+ case StateEstablished, StateFinWait1, StateFinWait2, StateTimeWait, StateCloseWait, StateLastAck, StateClosing:
bind()
if len(e.connectingAddress) == 0 {
// This endpoint is accepted by netstack but not yet by
@@ -211,7 +211,7 @@ func (e *endpoint) afterLoad() {
panic("endpoint connecting failed: " + err.String())
}
connectedLoading.Done()
- case stateListen:
+ case StateListen:
tcpip.AsyncLoading.Add(1)
go func() {
connectedLoading.Wait()
@@ -223,7 +223,7 @@ func (e *endpoint) afterLoad() {
listenLoading.Done()
tcpip.AsyncLoading.Done()
}()
- case stateConnecting:
+ case StateConnecting, StateSynSent, StateSynRecv:
tcpip.AsyncLoading.Add(1)
go func() {
connectedLoading.Wait()
@@ -235,7 +235,7 @@ func (e *endpoint) afterLoad() {
connectingLoading.Done()
tcpip.AsyncLoading.Done()
}()
- case stateBound:
+ case StateBound:
tcpip.AsyncLoading.Add(1)
go func() {
connectedLoading.Wait()
@@ -244,7 +244,7 @@ func (e *endpoint) afterLoad() {
bind()
tcpip.AsyncLoading.Done()
}()
- case stateClosed:
+ case StateClose:
if e.isPortReserved {
tcpip.AsyncLoading.Add(1)
go func() {
@@ -252,12 +252,12 @@ func (e *endpoint) afterLoad() {
listenLoading.Wait()
connectingLoading.Wait()
bind()
- e.state = stateClosed
+ e.state = StateClose
tcpip.AsyncLoading.Done()
}()
}
fallthrough
- case stateError:
+ case StateError:
tcpip.DeleteDanglingEndpoint(e)
}
}
diff --git a/pkg/tcpip/transport/tcp/rcv.go b/pkg/tcpip/transport/tcp/rcv.go
index b08a0e356..f02fa6105 100644
--- a/pkg/tcpip/transport/tcp/rcv.go
+++ b/pkg/tcpip/transport/tcp/rcv.go
@@ -134,6 +134,7 @@ func (r *receiver) consumeSegment(s *segment, segSeq seqnum.Value, segLen seqnum
// sequence numbers that have been consumed.
TrimSACKBlockList(&r.ep.sack, r.rcvNxt)
+ // Handle FIN or FIN-ACK.
if s.flagIsSet(header.TCPFlagFin) {
r.rcvNxt++
@@ -144,6 +145,25 @@ func (r *receiver) consumeSegment(s *segment, segSeq seqnum.Value, segLen seqnum
r.closed = true
r.ep.readyToRead(nil)
+ // We just received a FIN, our next state depends on whether we sent a
+ // FIN already or not.
+ r.ep.mu.Lock()
+ switch r.ep.state {
+ case StateEstablished:
+ r.ep.state = StateCloseWait
+ case StateFinWait1:
+ if s.flagIsSet(header.TCPFlagAck) {
+ // FIN-ACK, transition to TIME-WAIT.
+ r.ep.state = StateTimeWait
+ } else {
+ // Simultaneous close, expecting a final ACK.
+ r.ep.state = StateClosing
+ }
+ case StateFinWait2:
+ r.ep.state = StateTimeWait
+ }
+ r.ep.mu.Unlock()
+
// Flush out any pending segments, except the very first one if
// it happens to be the one we're handling now because the
// caller is using it.
@@ -156,6 +176,23 @@ func (r *receiver) consumeSegment(s *segment, segSeq seqnum.Value, segLen seqnum
r.pendingRcvdSegments[i].decRef()
}
r.pendingRcvdSegments = r.pendingRcvdSegments[:first]
+
+ return true
+ }
+
+ // Handle ACK (not FIN-ACK, which we handled above) during one of the
+ // shutdown states.
+ if s.flagIsSet(header.TCPFlagAck) {
+ r.ep.mu.Lock()
+ switch r.ep.state {
+ case StateFinWait1:
+ r.ep.state = StateFinWait2
+ case StateClosing:
+ r.ep.state = StateTimeWait
+ case StateLastAck:
+ r.ep.state = StateClose
+ }
+ r.ep.mu.Unlock()
}
return true
diff --git a/pkg/tcpip/transport/tcp/snd.go b/pkg/tcpip/transport/tcp/snd.go
index 3464e4be7..b236d7af2 100644
--- a/pkg/tcpip/transport/tcp/snd.go
+++ b/pkg/tcpip/transport/tcp/snd.go
@@ -632,6 +632,10 @@ func (s *sender) maybeSendSegment(seg *segment, limit int, end seqnum.Value) (se
}
seg.flags = header.TCPFlagAck | header.TCPFlagFin
segEnd = seg.sequenceNumber.Add(1)
+ // Transition to FIN-WAIT1 state since we're initiating an active close.
+ s.ep.mu.Lock()
+ s.ep.state = StateFinWait1
+ s.ep.mu.Unlock()
} else {
// We're sending a non-FIN segment.
if seg.flags&header.TCPFlagFin != 0 {
diff --git a/pkg/tcpip/transport/tcp/tcp_test.go b/pkg/tcpip/transport/tcp/tcp_test.go
index b8f0ccaf1..56b490aaa 100644
--- a/pkg/tcpip/transport/tcp/tcp_test.go
+++ b/pkg/tcpip/transport/tcp/tcp_test.go
@@ -168,8 +168,8 @@ func TestTCPResetsSentIncrement(t *testing.T) {
// Receive the SYN-ACK reply.
b := c.GetPacket()
- tcp := header.TCP(header.IPv4(b).Payload())
- c.IRS = seqnum.Value(tcp.SequenceNumber())
+ tcpHdr := header.TCP(header.IPv4(b).Payload())
+ c.IRS = seqnum.Value(tcpHdr.SequenceNumber())
ackHeaders := &context.Headers{
SrcPort: context.TestPort,
@@ -269,8 +269,8 @@ func TestConnectResetAfterClose(t *testing.T) {
time.Sleep(3 * time.Second)
for {
b := c.GetPacket()
- tcp := header.TCP(header.IPv4(b).Payload())
- if tcp.Flags() == header.TCPFlagAck|header.TCPFlagFin {
+ tcpHdr := header.TCP(header.IPv4(b).Payload())
+ if tcpHdr.Flags() == header.TCPFlagAck|header.TCPFlagFin {
// This is a retransmit of the FIN, ignore it.
continue
}
@@ -553,9 +553,13 @@ func TestRstOnCloseWithUnreadData(t *testing.T) {
// We shouldn't consume a sequence number on RST.
checker.SeqNum(uint32(c.IRS)+1),
))
+ // The RST puts the endpoint into an error state.
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateError; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
- // This final should be ignored because an ACK on a reset doesn't
- // mean anything.
+ // This final ACK should be ignored because an ACK on a reset doesn't mean
+ // anything.
c.SendPacket(nil, &context.Headers{
SrcPort: context.TestPort,
DstPort: c.Port,
@@ -618,6 +622,10 @@ func TestRstOnCloseWithUnreadDataFinConvertRst(t *testing.T) {
checker.SeqNum(uint32(c.IRS)+1),
))
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateFinWait1; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
// Cause a RST to be generated by closing the read end now since we have
// unread data.
c.EP.Shutdown(tcpip.ShutdownRead)
@@ -630,6 +638,10 @@ func TestRstOnCloseWithUnreadDataFinConvertRst(t *testing.T) {
// We shouldn't consume a sequence number on RST.
checker.SeqNum(uint32(c.IRS)+1),
))
+ // The RST puts the endpoint into an error state.
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateError; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
// The ACK to the FIN should now be rejected since the connection has been
// closed by a RST.
@@ -1510,8 +1522,8 @@ func testBrokenUpWrite(t *testing.T, c *context.Context, maxPayload int) {
for bytesReceived != dataLen {
b := c.GetPacket()
numPackets++
- tcp := header.TCP(header.IPv4(b).Payload())
- payloadLen := len(tcp.Payload())
+ tcpHdr := header.TCP(header.IPv4(b).Payload())
+ payloadLen := len(tcpHdr.Payload())
checker.IPv4(t, b,
checker.TCP(
checker.DstPort(context.TestPort),
@@ -1522,7 +1534,7 @@ func testBrokenUpWrite(t *testing.T, c *context.Context, maxPayload int) {
)
pdata := data[bytesReceived : bytesReceived+payloadLen]
- if p := tcp.Payload(); !bytes.Equal(pdata, p) {
+ if p := tcpHdr.Payload(); !bytes.Equal(pdata, p) {
t.Fatalf("got data = %v, want = %v", p, pdata)
}
bytesReceived += payloadLen
@@ -1530,7 +1542,7 @@ func testBrokenUpWrite(t *testing.T, c *context.Context, maxPayload int) {
if c.TimeStampEnabled {
// If timestamp option is enabled, echo back the timestamp and increment
// the TSEcr value included in the packet and send that back as the TSVal.
- parsedOpts := tcp.ParsedOptions()
+ parsedOpts := tcpHdr.ParsedOptions()
tsOpt := [12]byte{header.TCPOptionNOP, header.TCPOptionNOP}
header.EncodeTSOption(parsedOpts.TSEcr+1, parsedOpts.TSVal, tsOpt[2:])
options = tsOpt[:]
@@ -1757,8 +1769,8 @@ func TestSynOptionsOnActiveConnect(t *testing.T) {
),
)
- tcp := header.TCP(header.IPv4(b).Payload())
- c.IRS = seqnum.Value(tcp.SequenceNumber())
+ tcpHdr := header.TCP(header.IPv4(b).Payload())
+ c.IRS = seqnum.Value(tcpHdr.SequenceNumber())
// Wait for retransmit.
time.Sleep(1 * time.Second)
@@ -1766,8 +1778,8 @@ func TestSynOptionsOnActiveConnect(t *testing.T) {
checker.TCP(
checker.DstPort(context.TestPort),
checker.TCPFlags(header.TCPFlagSyn),
- checker.SrcPort(tcp.SourcePort()),
- checker.SeqNum(tcp.SequenceNumber()),
+ checker.SrcPort(tcpHdr.SourcePort()),
+ checker.SeqNum(tcpHdr.SequenceNumber()),
checker.TCPSynOptions(header.TCPSynOptions{MSS: mss, WS: wndScale}),
),
)
@@ -1775,8 +1787,8 @@ func TestSynOptionsOnActiveConnect(t *testing.T) {
// Send SYN-ACK.
iss := seqnum.Value(789)
c.SendPacket(nil, &context.Headers{
- SrcPort: tcp.DestinationPort(),
- DstPort: tcp.SourcePort(),
+ SrcPort: tcpHdr.DestinationPort(),
+ DstPort: tcpHdr.SourcePort(),
Flags: header.TCPFlagSyn | header.TCPFlagAck,
SeqNum: iss,
AckNum: c.IRS.Add(1),
@@ -2523,8 +2535,8 @@ func TestReceivedSegmentQueuing(t *testing.T) {
checker.TCPFlags(header.TCPFlagAck),
),
)
- tcp := header.TCP(header.IPv4(b).Payload())
- ack := seqnum.Value(tcp.AckNumber())
+ tcpHdr := header.TCP(header.IPv4(b).Payload())
+ ack := seqnum.Value(tcpHdr.AckNumber())
if ack == last {
break
}
@@ -2568,6 +2580,10 @@ func TestReadAfterClosedState(t *testing.T) {
),
)
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateFinWait1; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
// Send some data and acknowledge the FIN.
data := []byte{1, 2, 3}
c.SendPacket(data, &context.Headers{
@@ -2589,9 +2605,15 @@ func TestReadAfterClosedState(t *testing.T) {
),
)
- // Give the stack the chance to transition to closed state.
+ // Give the stack the chance to transition to closed state. Note that since
+ // both the sender and receiver are now closed, we effectively skip the
+ // TIME-WAIT state.
time.Sleep(1 * time.Second)
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateClose; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
// Wait for receive to be notified.
select {
case <-ch:
@@ -3680,9 +3702,15 @@ func TestPassiveConnectionAttemptIncrement(t *testing.T) {
if err := ep.Bind(tcpip.FullAddress{Addr: context.StackAddr, Port: context.StackPort}); err != nil {
t.Fatalf("Bind failed: %v", err)
}
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateBound; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
if err := c.EP.Listen(1); err != nil {
t.Fatalf("Listen failed: %v", err)
}
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateListen; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
stats := c.Stack().Stats()
want := stats.TCP.PassiveConnectionOpenings.Value() + 1
@@ -3826,3 +3854,68 @@ func TestPassiveFailedConnectionAttemptIncrement(t *testing.T) {
}
}
}
+
+func TestEndpointBindListenAcceptState(t *testing.T) {
+ c := context.New(t, defaultMTU)
+ defer c.Cleanup()
+ wq := &waiter.Queue{}
+ ep, err := c.Stack().NewEndpoint(tcp.ProtocolNumber, ipv4.ProtocolNumber, wq)
+ if err != nil {
+ t.Fatalf("NewEndpoint failed: %v", err)
+ }
+
+ if err := ep.Bind(tcpip.FullAddress{Port: context.StackPort}); err != nil {
+ t.Fatalf("Bind failed: %v", err)
+ }
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateBound; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
+ if err := ep.Listen(10); err != nil {
+ t.Fatalf("Listen failed: %v", err)
+ }
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateListen; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
+ c.PassiveConnectWithOptions(100, 5, header.TCPSynOptions{MSS: defaultIPv4MSS})
+
+ // Try to accept the connection.
+ we, ch := waiter.NewChannelEntry(nil)
+ wq.EventRegister(&we, waiter.EventIn)
+ defer wq.EventUnregister(&we)
+
+ aep, _, err := ep.Accept()
+ if err == tcpip.ErrWouldBlock {
+ // Wait for connection to be established.
+ select {
+ case <-ch:
+ aep, _, err = ep.Accept()
+ if err != nil {
+ t.Fatalf("Accept failed: %v", err)
+ }
+
+ case <-time.After(1 * time.Second):
+ t.Fatalf("Timed out waiting for accept")
+ }
+ }
+ if got, want := tcp.EndpointState(aep.State()), tcp.StateEstablished; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+ // Listening endpoint remains in listen state.
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateListen; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
+ ep.Close()
+ // Give worker goroutines time to receive the close notification.
+ time.Sleep(1 * time.Second)
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateClose; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+ // Accepted endpoint remains open when the listen endpoint is closed.
+ if got, want := tcp.EndpointState(aep.State()), tcp.StateEstablished; got != want {
+ t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
+}
diff --git a/pkg/tcpip/transport/tcp/testing/context/context.go b/pkg/tcpip/transport/tcp/testing/context/context.go
index 6e12413c6..69a43b6f4 100644
--- a/pkg/tcpip/transport/tcp/testing/context/context.go
+++ b/pkg/tcpip/transport/tcp/testing/context/context.go
@@ -532,6 +532,9 @@ func (c *Context) CreateConnectedWithRawOptions(iss seqnum.Value, rcvWnd seqnum.
if err != nil {
c.t.Fatalf("NewEndpoint failed: %v", err)
}
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateInitial; got != want {
+ c.t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
if epRcvBuf != nil {
if err := c.EP.SetSockOpt(*epRcvBuf); err != nil {
@@ -557,13 +560,16 @@ func (c *Context) CreateConnectedWithRawOptions(iss seqnum.Value, rcvWnd seqnum.
checker.TCPFlags(header.TCPFlagSyn),
),
)
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateSynSent; got != want {
+ c.t.Fatalf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
- tcp := header.TCP(header.IPv4(b).Payload())
- c.IRS = seqnum.Value(tcp.SequenceNumber())
+ tcpHdr := header.TCP(header.IPv4(b).Payload())
+ c.IRS = seqnum.Value(tcpHdr.SequenceNumber())
c.SendPacket(nil, &Headers{
- SrcPort: tcp.DestinationPort(),
- DstPort: tcp.SourcePort(),
+ SrcPort: tcpHdr.DestinationPort(),
+ DstPort: tcpHdr.SourcePort(),
Flags: header.TCPFlagSyn | header.TCPFlagAck,
SeqNum: iss,
AckNum: c.IRS.Add(1),
@@ -591,8 +597,11 @@ func (c *Context) CreateConnectedWithRawOptions(iss seqnum.Value, rcvWnd seqnum.
case <-time.After(1 * time.Second):
c.t.Fatalf("Timed out waiting for connection")
}
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateEstablished; got != want {
+ c.t.Fatalf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
- c.Port = tcp.SourcePort()
+ c.Port = tcpHdr.SourcePort()
}
// RawEndpoint is just a small wrapper around a TCP endpoint's state to make
@@ -690,6 +699,9 @@ func (c *Context) CreateConnectedWithOptions(wantOptions header.TCPSynOptions) *
if err != nil {
c.t.Fatalf("c.s.NewEndpoint(tcp, ipv4...) = %v", err)
}
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateInitial; got != want {
+ c.t.Fatalf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
// Start connection attempt.
waitEntry, notifyCh := waiter.NewChannelEntry(nil)
@@ -719,6 +731,10 @@ func (c *Context) CreateConnectedWithOptions(wantOptions header.TCPSynOptions) *
}),
),
)
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateSynSent; got != want {
+ c.t.Fatalf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
tcpSeg := header.TCP(header.IPv4(b).Payload())
synOptions := header.ParseSynOptions(tcpSeg.Options(), false)
@@ -782,6 +798,9 @@ func (c *Context) CreateConnectedWithOptions(wantOptions header.TCPSynOptions) *
case <-time.After(1 * time.Second):
c.t.Fatalf("Timed out waiting for connection")
}
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateEstablished; got != want {
+ c.t.Fatalf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
// Store the source port in use by the endpoint.
c.Port = tcpSeg.SourcePort()
@@ -821,10 +840,16 @@ func (c *Context) AcceptWithOptions(wndScale int, synOptions header.TCPSynOption
if err := ep.Bind(tcpip.FullAddress{Port: StackPort}); err != nil {
c.t.Fatalf("Bind failed: %v", err)
}
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateBound; got != want {
+ c.t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
if err := ep.Listen(10); err != nil {
c.t.Fatalf("Listen failed: %v", err)
}
+ if got, want := tcp.EndpointState(ep.State()), tcp.StateListen; got != want {
+ c.t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
rep := c.PassiveConnectWithOptions(100, wndScale, synOptions)
@@ -847,6 +872,10 @@ func (c *Context) AcceptWithOptions(wndScale int, synOptions header.TCPSynOption
c.t.Fatalf("Timed out waiting for accept")
}
}
+ if got, want := tcp.EndpointState(c.EP.State()), tcp.StateEstablished; got != want {
+ c.t.Errorf("Unexpected endpoint state: want %v, got %v", want, got)
+ }
+
return rep
}
diff --git a/pkg/tcpip/transport/udp/endpoint.go b/pkg/tcpip/transport/udp/endpoint.go
index 3d52a4f31..fa7278286 100644
--- a/pkg/tcpip/transport/udp/endpoint.go
+++ b/pkg/tcpip/transport/udp/endpoint.go
@@ -1000,3 +1000,9 @@ func (e *endpoint) HandlePacket(r *stack.Route, id stack.TransportEndpointID, vv
// HandleControlPacket implements stack.TransportEndpoint.HandleControlPacket.
func (e *endpoint) HandleControlPacket(id stack.TransportEndpointID, typ stack.ControlType, extra uint32, vv buffer.VectorisedView) {
}
+
+// State implements socket.Socket.State.
+func (e *endpoint) State() uint32 {
+ // TODO(b/112063468): Translate internal state to values returned by Linux.
+ return 0
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-06 08:42:16 +0000