snapshot: sagernet/gvisor v0.0.0-20250811.0-sing-box-mod.1

Содержимое пина, зафиксированного в go.mod sing-box-lx, одним коммитом
без истории. Полная история SagerNet/gvisor — 1.45 ГБ и клонируется в
каждой CI-джобе; наша дельта — одна вставка в одну функцию, история для
неё не нужна.

Module path github.com/sagernet/gvisor сохранён намеренно: на него
опирается replace-директива суперпроекта.

Патч поверх — отдельным коммитом, чтобы дельта читалась одним git show
и переносилась на новый пин копированием.

SPECS/TASKS/048-GVISOR_HANDSHAKE_NIL_CRASH

pkg/tcpip/transport/udp/endpoint_state.go

@@ -0,0 +1,96 @@
+// 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 udp
+
+import (
+	"context"
+	"time"
+
+	"github.com/sagernet/gvisor/pkg/log"
+	"github.com/sagernet/gvisor/pkg/tcpip"
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+	"github.com/sagernet/gvisor/pkg/tcpip/transport"
+)
+
+// saveReceivedAt is invoked by stateify.
+func (p *udpPacket) saveReceivedAt() int64 {
+	return p.receivedAt.UnixNano()
+}
+
+// loadReceivedAt is invoked by stateify.
+func (p *udpPacket) loadReceivedAt(_ context.Context, nsec int64) {
+	p.receivedAt = time.Unix(0, nsec)
+}
+
+// afterLoad is invoked by stateify.
+func (e *endpoint) afterLoad(ctx context.Context) {
+	if e.stack.IsSaveRestoreEnabled() {
+		e.stack.RegisterRestoredEndpoint(e)
+	} else {
+		stack.RestoreStackFromContext(ctx).RegisterRestoredEndpoint(e)
+	}
+}
+
+// beforeSave is invoked by stateify.
+func (e *endpoint) beforeSave() {
+	e.freeze()
+	e.stack.RegisterResumableEndpoint(e)
+}
+
+// Restore implements tcpip.RestoredEndpoint.Restore.
+func (e *endpoint) Restore(s *stack.Stack) {
+	e.mu.Lock()
+	defer e.mu.Unlock()
+
+	if err := e.net.Resume(s); err != nil {
+		log.Warningf("Closing the UDP endpoint as it cannot be restored, err: %v", err)
+		e.closeLocked()
+		return
+	}
+
+	// Unfreeze the endpoint to handle packets.
+	e.frozen = false
+	if e.stack.IsSaveRestoreEnabled() {
+		e.ops.InitHandler(e, e.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
+		return
+	}
+	e.stack = s
+	e.ops.InitHandler(e, e.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
+
+	switch state := e.net.State(); state {
+	case transport.DatagramEndpointStateInitial, transport.DatagramEndpointStateClosed:
+	case transport.DatagramEndpointStateBound, transport.DatagramEndpointStateConnected:
+		// Our saved state had a port, but we don't actually have a
+		// reservation. We need to remove the port from our state, but still
+		// pass it to the reservation machinery.
+		var err tcpip.Error
+		id := e.net.Info().ID
+		id.LocalPort = e.localPort
+		id.RemotePort = e.remotePort
+		id, e.boundBindToDevice, err = e.registerWithStack(e.effectiveNetProtos, id)
+		if err != nil {
+			panic("registering udp endpoint with the stack failed during restore")
+		}
+		e.localPort = id.LocalPort
+		e.remotePort = id.RemotePort
+	default:
+		panic("unhandled state")
+	}
+}
+
+// Resume implements tcpip.ResumableEndpoint.Resume.
+func (e *endpoint) Resume() {
+	e.thaw()
+}

pkg/tcpip/transport/udp/forwarder.go

@@ -0,0 +1,112 @@
+// Copyright 2019 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 udp
+
+import (
+	"github.com/sagernet/gvisor/pkg/tcpip"
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+	"github.com/sagernet/gvisor/pkg/waiter"
+)
+
+// ForwarderHandler handles incoming requests. Returning true marks the
+// request as handled, returning false marks the request as unhandled.
+// Stack may send an ICMP port unreachable message for unhandled requests.
+type ForwarderHandler func(*ForwarderRequest) (handled bool)
+
+// Forwarder is a session request forwarder, which allows clients to decide
+// what to do with a session request, for example: ignore it, or process it.
+//
+// The canonical way of using it is to pass the Forwarder.HandlePacket function
+// to stack.SetTransportProtocolHandler.
+type Forwarder struct {
+	handler ForwarderHandler
+
+	stack *stack.Stack
+}
+
+// NewForwarder allocates and initializes a new forwarder.
+func NewForwarder(s *stack.Stack, handler ForwarderHandler) *Forwarder {
+	return &Forwarder{
+		stack:   s,
+		handler: handler,
+	}
+}
+
+// HandlePacket handles all packets.
+//
+// This function is expected to be passed as an argument to the
+// stack.SetTransportProtocolHandler function.
+func (f *Forwarder) HandlePacket(id stack.TransportEndpointID, pkt *stack.PacketBuffer) bool {
+	return f.handler(&ForwarderRequest{
+		stack: f.stack,
+		id:    id,
+		pkt:   pkt.Clone(),
+	})
+}
+
+// ForwarderRequest represents a session request received by the forwarder and
+// passed to the client. Clients may optionally create an endpoint to represent
+// it via CreateEndpoint.
+type ForwarderRequest struct {
+	stack *stack.Stack
+	id    stack.TransportEndpointID
+	pkt   *stack.PacketBuffer
+}
+
+// ID returns the 4-tuple (src address, src port, dst address, dst port) that
+// represents the session request.
+func (r *ForwarderRequest) ID() stack.TransportEndpointID {
+	return r.id
+}
+
+// CreateEndpoint creates a connected UDP endpoint for the session request.
+func (r *ForwarderRequest) CreateEndpoint(queue *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	ep := newEndpoint(r.stack, r.pkt.NetworkProtocolNumber, queue)
+	ep.mu.Lock()
+	defer ep.mu.Unlock()
+
+	netHdr := r.pkt.Network()
+	if err := ep.net.Bind(tcpip.FullAddress{NIC: r.pkt.NICID, Addr: netHdr.DestinationAddress(), Port: r.id.LocalPort}); err != nil {
+		ep.closeLocked()
+		return nil, err
+	}
+
+	if err := ep.net.Connect(tcpip.FullAddress{NIC: r.pkt.NICID, Addr: netHdr.SourceAddress(), Port: r.id.RemotePort}); err != nil {
+		ep.closeLocked()
+		return nil, err
+	}
+
+	if err := r.stack.RegisterTransportEndpoint([]tcpip.NetworkProtocolNumber{r.pkt.NetworkProtocolNumber}, ProtocolNumber, r.id, ep, ep.portFlags, tcpip.NICID(ep.ops.GetBindToDevice())); err != nil {
+		ep.closeLocked()
+		return nil, err
+	}
+
+	ep.localPort = r.id.LocalPort
+	ep.remotePort = r.id.RemotePort
+	ep.effectiveNetProtos = []tcpip.NetworkProtocolNumber{r.pkt.NetworkProtocolNumber}
+	ep.boundPortFlags = ep.portFlags
+
+	ep.rcvMu.Lock()
+	ep.rcvReady = true
+	ep.rcvMu.Unlock()
+
+	ep.HandlePacket(r.id, r.pkt)
+
+	return ep, nil
+}
+
+func (r *ForwarderRequest) Packet() *stack.PacketBuffer {
+	return r.pkt
+}

pkg/tcpip/transport/udp/protocol.go

@@ -0,0 +1,138 @@
+// 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 udp contains the implementation of the UDP transport protocol.
+package udp
+
+import (
+	"github.com/sagernet/gvisor/pkg/tcpip"
+	"github.com/sagernet/gvisor/pkg/tcpip/header"
+	"github.com/sagernet/gvisor/pkg/tcpip/header/parse"
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+	"github.com/sagernet/gvisor/pkg/tcpip/transport/raw"
+	"github.com/sagernet/gvisor/pkg/waiter"
+)
+
+const (
+	// ProtocolNumber is the udp protocol number.
+	ProtocolNumber = header.UDPProtocolNumber
+
+	// MinBufferSize is the smallest size of a receive or send buffer.
+	MinBufferSize = 4 << 10 // 4KiB bytes.
+
+	// DefaultSendBufferSize is the default size of the send buffer for
+	// an endpoint.
+	DefaultSendBufferSize = 32 << 10 // 32KiB
+
+	// DefaultReceiveBufferSize is the default size of the receive buffer
+	// for an endpoint.
+	DefaultReceiveBufferSize = 32 << 10 // 32KiB
+
+	// MaxBufferSize is the largest size a receive/send buffer can grow to.
+	MaxBufferSize = 4 << 20 // 4MiB
+)
+
+// +stateify savable
+type protocol struct {
+	stack *stack.Stack
+}
+
+// Number returns the udp protocol number.
+func (*protocol) Number() tcpip.TransportProtocolNumber {
+	return ProtocolNumber
+}
+
+// NewEndpoint creates a new udp endpoint.
+func (p *protocol) NewEndpoint(netProto tcpip.NetworkProtocolNumber, waiterQueue *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	return newEndpoint(p.stack, netProto, waiterQueue), nil
+}
+
+// NewRawEndpoint creates a new raw UDP endpoint. It implements
+// stack.TransportProtocol.NewRawEndpoint.
+func (p *protocol) NewRawEndpoint(netProto tcpip.NetworkProtocolNumber, waiterQueue *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	return raw.NewEndpoint(p.stack, netProto, header.UDPProtocolNumber, waiterQueue)
+}
+
+// MinimumPacketSize returns the minimum valid udp packet size.
+func (*protocol) MinimumPacketSize() int {
+	return header.UDPMinimumSize
+}
+
+// ParsePorts returns the source and destination ports stored in the given udp
+// packet.
+func (*protocol) ParsePorts(v []byte) (src, dst uint16, err tcpip.Error) {
+	h := header.UDP(v)
+	return h.SourcePort(), h.DestinationPort(), nil
+}
+
+// HandleUnknownDestinationPacket handles packets that are targeted at this
+// protocol but don't match any existing endpoint.
+func (p *protocol) HandleUnknownDestinationPacket(id stack.TransportEndpointID, pkt *stack.PacketBuffer) stack.UnknownDestinationPacketDisposition {
+	hdr := header.UDP(pkt.TransportHeader().Slice())
+	netHdr := pkt.Network()
+	lengthValid, csumValid := header.UDPValid(
+		hdr,
+		func() uint16 { return pkt.Data().Checksum() },
+		uint16(pkt.Data().Size()),
+		pkt.NetworkProtocolNumber,
+		netHdr.SourceAddress(),
+		netHdr.DestinationAddress(),
+		pkt.RXChecksumValidated)
+	if !lengthValid {
+		p.stack.Stats().UDP.MalformedPacketsReceived.Increment()
+		return stack.UnknownDestinationPacketMalformed
+	}
+
+	if !csumValid {
+		p.stack.Stats().UDP.ChecksumErrors.Increment()
+		return stack.UnknownDestinationPacketMalformed
+	}
+
+	return stack.UnknownDestinationPacketUnhandled
+}
+
+// SetOption implements stack.TransportProtocol.SetOption.
+func (*protocol) SetOption(tcpip.SettableTransportProtocolOption) tcpip.Error {
+	return &tcpip.ErrUnknownProtocolOption{}
+}
+
+// Option implements stack.TransportProtocol.Option.
+func (*protocol) Option(tcpip.GettableTransportProtocolOption) tcpip.Error {
+	return &tcpip.ErrUnknownProtocolOption{}
+}
+
+// Close implements stack.TransportProtocol.Close.
+func (*protocol) Close() {}
+
+// Wait implements stack.TransportProtocol.Wait.
+func (*protocol) Wait() {}
+
+// Pause implements stack.TransportProtocol.Pause.
+func (*protocol) Pause() {}
+
+// Resume implements stack.TransportProtocol.Resume.
+func (*protocol) Resume() {}
+
+// Restore implements stack.TransportProtocol.Restore.
+func (*protocol) Restore() {}
+
+// Parse implements stack.TransportProtocol.Parse.
+func (*protocol) Parse(pkt *stack.PacketBuffer) bool {
+	return parse.UDP(pkt)
+}
+
+// NewProtocol returns a UDP transport protocol.
+func NewProtocol(s *stack.Stack) stack.TransportProtocol {
+	return &protocol{stack: s}
+}

pkg/tcpip/transport/udp/udp_packet_list.go

@@ -0,0 +1,239 @@
+package udp
+
+// ElementMapper provides an identity mapping by default.
+//
+// This can be replaced to provide a struct that maps elements to linker
+// objects, if they are not the same. An ElementMapper is not typically
+// required if: Linker is left as is, Element is left as is, or Linker and
+// Element are the same type.
+type udpPacketElementMapper struct{}
+
+// linkerFor maps an Element to a Linker.
+//
+// This default implementation should be inlined.
+//
+//go:nosplit
+func (udpPacketElementMapper) linkerFor(elem *udpPacket) *udpPacket { return elem }
+
+// List is an intrusive list. Entries can be added to or removed from the list
+// in O(1) time and with no additional memory allocations.
+//
+// The zero value for List is an empty list ready to use.
+//
+// To iterate over a list (where l is a List):
+//
+//	for e := l.Front(); e != nil; e = e.Next() {
+//		// do something with e.
+//	}
+//
+// +stateify savable
+type udpPacketList struct {
+	head *udpPacket
+	tail *udpPacket
+}
+
+// Reset resets list l to the empty state.
+func (l *udpPacketList) Reset() {
+	l.head = nil
+	l.tail = nil
+}
+
+// Empty returns true iff the list is empty.
+//
+//go:nosplit
+func (l *udpPacketList) Empty() bool {
+	return l.head == nil
+}
+
+// Front returns the first element of list l or nil.
+//
+//go:nosplit
+func (l *udpPacketList) Front() *udpPacket {
+	return l.head
+}
+
+// Back returns the last element of list l or nil.
+//
+//go:nosplit
+func (l *udpPacketList) Back() *udpPacket {
+	return l.tail
+}
+
+// Len returns the number of elements in the list.
+//
+// NOTE: This is an O(n) operation.
+//
+//go:nosplit
+func (l *udpPacketList) Len() (count int) {
+	for e := l.Front(); e != nil; e = (udpPacketElementMapper{}.linkerFor(e)).Next() {
+		count++
+	}
+	return count
+}
+
+// PushFront inserts the element e at the front of list l.
+//
+//go:nosplit
+func (l *udpPacketList) PushFront(e *udpPacket) {
+	linker := udpPacketElementMapper{}.linkerFor(e)
+	linker.SetNext(l.head)
+	linker.SetPrev(nil)
+	if l.head != nil {
+		udpPacketElementMapper{}.linkerFor(l.head).SetPrev(e)
+	} else {
+		l.tail = e
+	}
+
+	l.head = e
+}
+
+// PushFrontList inserts list m at the start of list l, emptying m.
+//
+//go:nosplit
+func (l *udpPacketList) PushFrontList(m *udpPacketList) {
+	if l.head == nil {
+		l.head = m.head
+		l.tail = m.tail
+	} else if m.head != nil {
+		udpPacketElementMapper{}.linkerFor(l.head).SetPrev(m.tail)
+		udpPacketElementMapper{}.linkerFor(m.tail).SetNext(l.head)
+
+		l.head = m.head
+	}
+	m.head = nil
+	m.tail = nil
+}
+
+// PushBack inserts the element e at the back of list l.
+//
+//go:nosplit
+func (l *udpPacketList) PushBack(e *udpPacket) {
+	linker := udpPacketElementMapper{}.linkerFor(e)
+	linker.SetNext(nil)
+	linker.SetPrev(l.tail)
+	if l.tail != nil {
+		udpPacketElementMapper{}.linkerFor(l.tail).SetNext(e)
+	} else {
+		l.head = e
+	}
+
+	l.tail = e
+}
+
+// PushBackList inserts list m at the end of list l, emptying m.
+//
+//go:nosplit
+func (l *udpPacketList) PushBackList(m *udpPacketList) {
+	if l.head == nil {
+		l.head = m.head
+		l.tail = m.tail
+	} else if m.head != nil {
+		udpPacketElementMapper{}.linkerFor(l.tail).SetNext(m.head)
+		udpPacketElementMapper{}.linkerFor(m.head).SetPrev(l.tail)
+
+		l.tail = m.tail
+	}
+	m.head = nil
+	m.tail = nil
+}
+
+// InsertAfter inserts e after b.
+//
+//go:nosplit
+func (l *udpPacketList) InsertAfter(b, e *udpPacket) {
+	bLinker := udpPacketElementMapper{}.linkerFor(b)
+	eLinker := udpPacketElementMapper{}.linkerFor(e)
+
+	a := bLinker.Next()
+
+	eLinker.SetNext(a)
+	eLinker.SetPrev(b)
+	bLinker.SetNext(e)
+
+	if a != nil {
+		udpPacketElementMapper{}.linkerFor(a).SetPrev(e)
+	} else {
+		l.tail = e
+	}
+}
+
+// InsertBefore inserts e before a.
+//
+//go:nosplit
+func (l *udpPacketList) InsertBefore(a, e *udpPacket) {
+	aLinker := udpPacketElementMapper{}.linkerFor(a)
+	eLinker := udpPacketElementMapper{}.linkerFor(e)
+
+	b := aLinker.Prev()
+	eLinker.SetNext(a)
+	eLinker.SetPrev(b)
+	aLinker.SetPrev(e)
+
+	if b != nil {
+		udpPacketElementMapper{}.linkerFor(b).SetNext(e)
+	} else {
+		l.head = e
+	}
+}
+
+// Remove removes e from l.
+//
+//go:nosplit
+func (l *udpPacketList) Remove(e *udpPacket) {
+	linker := udpPacketElementMapper{}.linkerFor(e)
+	prev := linker.Prev()
+	next := linker.Next()
+
+	if prev != nil {
+		udpPacketElementMapper{}.linkerFor(prev).SetNext(next)
+	} else if l.head == e {
+		l.head = next
+	}
+
+	if next != nil {
+		udpPacketElementMapper{}.linkerFor(next).SetPrev(prev)
+	} else if l.tail == e {
+		l.tail = prev
+	}
+
+	linker.SetNext(nil)
+	linker.SetPrev(nil)
+}
+
+// Entry is a default implementation of Linker. Users can add anonymous fields
+// of this type to their structs to make them automatically implement the
+// methods needed by List.
+//
+// +stateify savable
+type udpPacketEntry struct {
+	next *udpPacket
+	prev *udpPacket
+}
+
+// Next returns the entry that follows e in the list.
+//
+//go:nosplit
+func (e *udpPacketEntry) Next() *udpPacket {
+	return e.next
+}
+
+// Prev returns the entry that precedes e in the list.
+//
+//go:nosplit
+func (e *udpPacketEntry) Prev() *udpPacket {
+	return e.prev
+}
+
+// SetNext assigns 'entry' as the entry that follows e in the list.
+//
+//go:nosplit
+func (e *udpPacketEntry) SetNext(elem *udpPacket) {
+	e.next = elem
+}
+
+// SetPrev assigns 'entry' as the entry that precedes e in the list.
+//
+//go:nosplit
+func (e *udpPacketEntry) SetPrev(elem *udpPacket) {
+	e.prev = elem
+}

pkg/tcpip/transport/udp/udp_state_autogen.go

@@ -0,0 +1,225 @@
+// automatically generated by stateify.
+
+package udp
+
+import (
+	"context"
+
+	"github.com/sagernet/gvisor/pkg/state"
+)
+
+func (p *udpPacket) StateTypeName() string {
+	return "pkg/tcpip/transport/udp.udpPacket"
+}
+
+func (p *udpPacket) StateFields() []string {
+	return []string{
+		"udpPacketEntry",
+		"netProto",
+		"senderAddress",
+		"destinationAddress",
+		"packetInfo",
+		"pkt",
+		"receivedAt",
+		"tosOrTClass",
+		"ttlOrHopLimit",
+	}
+}
+
+func (p *udpPacket) beforeSave() {}
+
+// +checklocksignore
+func (p *udpPacket) StateSave(stateSinkObject state.Sink) {
+	p.beforeSave()
+	var receivedAtValue int64
+	receivedAtValue = p.saveReceivedAt()
+	stateSinkObject.SaveValue(6, receivedAtValue)
+	stateSinkObject.Save(0, &p.udpPacketEntry)
+	stateSinkObject.Save(1, &p.netProto)
+	stateSinkObject.Save(2, &p.senderAddress)
+	stateSinkObject.Save(3, &p.destinationAddress)
+	stateSinkObject.Save(4, &p.packetInfo)
+	stateSinkObject.Save(5, &p.pkt)
+	stateSinkObject.Save(7, &p.tosOrTClass)
+	stateSinkObject.Save(8, &p.ttlOrHopLimit)
+}
+
+func (p *udpPacket) afterLoad(context.Context) {}
+
+// +checklocksignore
+func (p *udpPacket) StateLoad(ctx context.Context, stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &p.udpPacketEntry)
+	stateSourceObject.Load(1, &p.netProto)
+	stateSourceObject.Load(2, &p.senderAddress)
+	stateSourceObject.Load(3, &p.destinationAddress)
+	stateSourceObject.Load(4, &p.packetInfo)
+	stateSourceObject.Load(5, &p.pkt)
+	stateSourceObject.Load(7, &p.tosOrTClass)
+	stateSourceObject.Load(8, &p.ttlOrHopLimit)
+	stateSourceObject.LoadValue(6, new(int64), func(y any) { p.loadReceivedAt(ctx, y.(int64)) })
+}
+
+func (e *endpoint) StateTypeName() string {
+	return "pkg/tcpip/transport/udp.endpoint"
+}
+
+func (e *endpoint) StateFields() []string {
+	return []string{
+		"DefaultSocketOptionsHandler",
+		"stack",
+		"waiterQueue",
+		"net",
+		"stats",
+		"ops",
+		"rcvReady",
+		"rcvList",
+		"rcvBufSize",
+		"rcvClosed",
+		"lastError",
+		"portFlags",
+		"boundBindToDevice",
+		"boundPortFlags",
+		"readShutdown",
+		"effectiveNetProtos",
+		"frozen",
+		"localPort",
+		"remotePort",
+	}
+}
+
+// +checklocksignore
+func (e *endpoint) StateSave(stateSinkObject state.Sink) {
+	e.beforeSave()
+	stateSinkObject.Save(0, &e.DefaultSocketOptionsHandler)
+	stateSinkObject.Save(1, &e.stack)
+	stateSinkObject.Save(2, &e.waiterQueue)
+	stateSinkObject.Save(3, &e.net)
+	stateSinkObject.Save(4, &e.stats)
+	stateSinkObject.Save(5, &e.ops)
+	stateSinkObject.Save(6, &e.rcvReady)
+	stateSinkObject.Save(7, &e.rcvList)
+	stateSinkObject.Save(8, &e.rcvBufSize)
+	stateSinkObject.Save(9, &e.rcvClosed)
+	stateSinkObject.Save(10, &e.lastError)
+	stateSinkObject.Save(11, &e.portFlags)
+	stateSinkObject.Save(12, &e.boundBindToDevice)
+	stateSinkObject.Save(13, &e.boundPortFlags)
+	stateSinkObject.Save(14, &e.readShutdown)
+	stateSinkObject.Save(15, &e.effectiveNetProtos)
+	stateSinkObject.Save(16, &e.frozen)
+	stateSinkObject.Save(17, &e.localPort)
+	stateSinkObject.Save(18, &e.remotePort)
+}
+
+// +checklocksignore
+func (e *endpoint) StateLoad(ctx context.Context, stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &e.DefaultSocketOptionsHandler)
+	stateSourceObject.Load(1, &e.stack)
+	stateSourceObject.Load(2, &e.waiterQueue)
+	stateSourceObject.Load(3, &e.net)
+	stateSourceObject.Load(4, &e.stats)
+	stateSourceObject.Load(5, &e.ops)
+	stateSourceObject.Load(6, &e.rcvReady)
+	stateSourceObject.Load(7, &e.rcvList)
+	stateSourceObject.Load(8, &e.rcvBufSize)
+	stateSourceObject.Load(9, &e.rcvClosed)
+	stateSourceObject.Load(10, &e.lastError)
+	stateSourceObject.Load(11, &e.portFlags)
+	stateSourceObject.Load(12, &e.boundBindToDevice)
+	stateSourceObject.Load(13, &e.boundPortFlags)
+	stateSourceObject.Load(14, &e.readShutdown)
+	stateSourceObject.Load(15, &e.effectiveNetProtos)
+	stateSourceObject.Load(16, &e.frozen)
+	stateSourceObject.Load(17, &e.localPort)
+	stateSourceObject.Load(18, &e.remotePort)
+	stateSourceObject.AfterLoad(func() { e.afterLoad(ctx) })
+}
+
+func (p *protocol) StateTypeName() string {
+	return "pkg/tcpip/transport/udp.protocol"
+}
+
+func (p *protocol) StateFields() []string {
+	return []string{
+		"stack",
+	}
+}
+
+func (p *protocol) beforeSave() {}
+
+// +checklocksignore
+func (p *protocol) StateSave(stateSinkObject state.Sink) {
+	p.beforeSave()
+	stateSinkObject.Save(0, &p.stack)
+}
+
+func (p *protocol) afterLoad(context.Context) {}
+
+// +checklocksignore
+func (p *protocol) StateLoad(ctx context.Context, stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &p.stack)
+}
+
+func (l *udpPacketList) StateTypeName() string {
+	return "pkg/tcpip/transport/udp.udpPacketList"
+}
+
+func (l *udpPacketList) StateFields() []string {
+	return []string{
+		"head",
+		"tail",
+	}
+}
+
+func (l *udpPacketList) beforeSave() {}
+
+// +checklocksignore
+func (l *udpPacketList) StateSave(stateSinkObject state.Sink) {
+	l.beforeSave()
+	stateSinkObject.Save(0, &l.head)
+	stateSinkObject.Save(1, &l.tail)
+}
+
+func (l *udpPacketList) afterLoad(context.Context) {}
+
+// +checklocksignore
+func (l *udpPacketList) StateLoad(ctx context.Context, stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &l.head)
+	stateSourceObject.Load(1, &l.tail)
+}
+
+func (e *udpPacketEntry) StateTypeName() string {
+	return "pkg/tcpip/transport/udp.udpPacketEntry"
+}
+
+func (e *udpPacketEntry) StateFields() []string {
+	return []string{
+		"next",
+		"prev",
+	}
+}
+
+func (e *udpPacketEntry) beforeSave() {}
+
+// +checklocksignore
+func (e *udpPacketEntry) StateSave(stateSinkObject state.Sink) {
+	e.beforeSave()
+	stateSinkObject.Save(0, &e.next)
+	stateSinkObject.Save(1, &e.prev)
+}
+
+func (e *udpPacketEntry) afterLoad(context.Context) {}
+
+// +checklocksignore
+func (e *udpPacketEntry) StateLoad(ctx context.Context, stateSourceObject state.Source) {
+	stateSourceObject.Load(0, &e.next)
+	stateSourceObject.Load(1, &e.prev)
+}
+
+func init() {
+	state.Register((*udpPacket)(nil))
+	state.Register((*endpoint)(nil))
+	state.Register((*protocol)(nil))
+	state.Register((*udpPacketList)(nil))
+	state.Register((*udpPacketEntry)(nil))
+}