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/network/arp/stats.go

@@ -0,0 +1,74 @@
+// Copyright 2021 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 arp
+
+import (
+	"github.com/sagernet/gvisor/pkg/tcpip"
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+)
+
+var _ stack.NetworkEndpointStats = (*Stats)(nil)
+
+// Stats holds statistics related to ARP.
+//
+// +stateify savable
+type Stats struct {
+	// ARP holds ARP statistics.
+	ARP tcpip.ARPStats
+}
+
+// IsNetworkEndpointStats implements stack.NetworkEndpointStats.
+func (*Stats) IsNetworkEndpointStats() {}
+
+// +stateify savable
+type sharedStats struct {
+	localStats Stats
+	arp        multiCounterARPStats
+}
+
+// LINT.IfChange(multiCounterARPStats)
+
+// +stateify savable
+type multiCounterARPStats struct {
+	packetsReceived                                 tcpip.MultiCounterStat
+	disabledPacketsReceived                         tcpip.MultiCounterStat
+	malformedPacketsReceived                        tcpip.MultiCounterStat
+	requestsReceived                                tcpip.MultiCounterStat
+	requestsReceivedUnknownTargetAddress            tcpip.MultiCounterStat
+	outgoingRequestInterfaceHasNoLocalAddressErrors tcpip.MultiCounterStat
+	outgoingRequestBadLocalAddressErrors            tcpip.MultiCounterStat
+	outgoingRequestsDropped                         tcpip.MultiCounterStat
+	outgoingRequestsSent                            tcpip.MultiCounterStat
+	repliesReceived                                 tcpip.MultiCounterStat
+	outgoingRepliesDropped                          tcpip.MultiCounterStat
+	outgoingRepliesSent                             tcpip.MultiCounterStat
+}
+
+func (m *multiCounterARPStats) init(a, b *tcpip.ARPStats) {
+	m.packetsReceived.Init(a.PacketsReceived, b.PacketsReceived)
+	m.disabledPacketsReceived.Init(a.DisabledPacketsReceived, b.DisabledPacketsReceived)
+	m.malformedPacketsReceived.Init(a.MalformedPacketsReceived, b.MalformedPacketsReceived)
+	m.requestsReceived.Init(a.RequestsReceived, b.RequestsReceived)
+	m.requestsReceivedUnknownTargetAddress.Init(a.RequestsReceivedUnknownTargetAddress, b.RequestsReceivedUnknownTargetAddress)
+	m.outgoingRequestInterfaceHasNoLocalAddressErrors.Init(a.OutgoingRequestInterfaceHasNoLocalAddressErrors, b.OutgoingRequestInterfaceHasNoLocalAddressErrors)
+	m.outgoingRequestBadLocalAddressErrors.Init(a.OutgoingRequestBadLocalAddressErrors, b.OutgoingRequestBadLocalAddressErrors)
+	m.outgoingRequestsDropped.Init(a.OutgoingRequestsDropped, b.OutgoingRequestsDropped)
+	m.outgoingRequestsSent.Init(a.OutgoingRequestsSent, b.OutgoingRequestsSent)
+	m.repliesReceived.Init(a.RepliesReceived, b.RepliesReceived)
+	m.outgoingRepliesDropped.Init(a.OutgoingRepliesDropped, b.OutgoingRepliesDropped)
+	m.outgoingRepliesSent.Init(a.OutgoingRepliesSent, b.OutgoingRepliesSent)
+}
+
+// LINT.ThenChange(../../tcpip.go:ARPStats)