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/internal/ip/stats.go

@@ -0,0 +1,219 @@
+// 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 ip
+
+import "github.com/sagernet/gvisor/pkg/tcpip"
+
+// LINT.IfChange(MultiCounterIPForwardingStats)
+
+// MultiCounterIPForwardingStats holds IP forwarding statistics. Each counter
+// may have several versions.
+//
+// +stateify savable
+type MultiCounterIPForwardingStats struct {
+	// Unrouteable is the number of IP packets received which were dropped
+	// because the netstack could not construct a route to their
+	// destination.
+	Unrouteable tcpip.MultiCounterStat
+
+	// ExhaustedTTL is the number of IP packets received which were dropped
+	// because their TTL was exhausted.
+	ExhaustedTTL tcpip.MultiCounterStat
+
+	// InitializingSource is the number of IP packets which were dropped
+	// because they contained a source address that may only be used on the local
+	// network as part of initialization work.
+	InitializingSource tcpip.MultiCounterStat
+
+	// LinkLocalSource is the number of IP packets which were dropped
+	// because they contained a link-local source address.
+	LinkLocalSource tcpip.MultiCounterStat
+
+	// LinkLocalDestination is the number of IP packets which were dropped
+	// because they contained a link-local destination address.
+	LinkLocalDestination tcpip.MultiCounterStat
+
+	// PacketTooBig is the number of IP packets which were dropped because they
+	// were too big for the outgoing MTU.
+	PacketTooBig tcpip.MultiCounterStat
+
+	// HostUnreachable is the number of IP packets received which could not be
+	// successfully forwarded due to an unresolvable next hop.
+	HostUnreachable tcpip.MultiCounterStat
+
+	// ExtensionHeaderProblem is the number of IP packets which were dropped
+	// because of a problem encountered when processing an IPv6 extension
+	// header.
+	ExtensionHeaderProblem tcpip.MultiCounterStat
+
+	// UnexpectedMulticastInputInterface is the number of multicast packets that
+	// were received on an interface that did not match the corresponding route's
+	// expected input interface.
+	UnexpectedMulticastInputInterface tcpip.MultiCounterStat
+
+	// UnknownOutputEndpoint is the number of packets that could not be forwarded
+	// because the output endpoint could not be found.
+	UnknownOutputEndpoint tcpip.MultiCounterStat
+
+	// NoMulticastPendingQueueBufferSpace is the number of multicast packets that
+	// were dropped due to insufficient buffer space in the pending packet queue.
+	NoMulticastPendingQueueBufferSpace tcpip.MultiCounterStat
+
+	// OutgoingDeviceNoBufferSpace is the number of packets that were dropped due
+	// to insufficient space in the outgoing device.
+	OutgoingDeviceNoBufferSpace tcpip.MultiCounterStat
+
+	// Errors is the number of IP packets received which could not be
+	// successfully forwarded.
+	Errors tcpip.MultiCounterStat
+
+	// OutgoingDeviceClosedForSend is the number of packets that were dropped due
+	// to the outgoing device being closed for send.
+	OutgoingDeviceClosedForSend tcpip.MultiCounterStat
+}
+
+// Init sets internal counters to track a and b counters.
+func (m *MultiCounterIPForwardingStats) Init(a, b *tcpip.IPForwardingStats) {
+	m.Unrouteable.Init(a.Unrouteable, b.Unrouteable)
+	m.Errors.Init(a.Errors, b.Errors)
+	m.InitializingSource.Init(a.InitializingSource, b.InitializingSource)
+	m.LinkLocalSource.Init(a.LinkLocalSource, b.LinkLocalSource)
+	m.LinkLocalDestination.Init(a.LinkLocalDestination, b.LinkLocalDestination)
+	m.ExtensionHeaderProblem.Init(a.ExtensionHeaderProblem, b.ExtensionHeaderProblem)
+	m.PacketTooBig.Init(a.PacketTooBig, b.PacketTooBig)
+	m.ExhaustedTTL.Init(a.ExhaustedTTL, b.ExhaustedTTL)
+	m.HostUnreachable.Init(a.HostUnreachable, b.HostUnreachable)
+	m.UnexpectedMulticastInputInterface.Init(a.UnexpectedMulticastInputInterface, b.UnexpectedMulticastInputInterface)
+	m.UnknownOutputEndpoint.Init(a.UnknownOutputEndpoint, b.UnknownOutputEndpoint)
+	m.NoMulticastPendingQueueBufferSpace.Init(a.NoMulticastPendingQueueBufferSpace, b.NoMulticastPendingQueueBufferSpace)
+	m.OutgoingDeviceNoBufferSpace.Init(a.OutgoingDeviceNoBufferSpace, b.OutgoingDeviceNoBufferSpace)
+	m.OutgoingDeviceClosedForSend.Init(a.OutgoingDeviceClosedForSend, b.OutgoingDeviceClosedForSend)
+}
+
+// LINT.ThenChange(../../../tcpip.go:IPForwardingStats)
+
+// LINT.IfChange(MultiCounterIPStats)
+
+// MultiCounterIPStats holds IP statistics, each counter may have several
+// versions.
+//
+// +stateify savable
+type MultiCounterIPStats struct {
+	// PacketsReceived is the number of IP packets received from the link
+	// layer.
+	PacketsReceived tcpip.MultiCounterStat
+
+	// ValidPacketsReceived is the number of valid IP packets that reached the IP
+	// layer.
+	ValidPacketsReceived tcpip.MultiCounterStat
+
+	// DisabledPacketsReceived is the number of IP packets received from
+	// the link layer when the IP layer is disabled.
+	DisabledPacketsReceived tcpip.MultiCounterStat
+
+	// InvalidDestinationAddressesReceived is the number of IP packets
+	// received with an unknown or invalid destination address.
+	InvalidDestinationAddressesReceived tcpip.MultiCounterStat
+
+	// InvalidSourceAddressesReceived is the number of IP packets received
+	// with a source address that should never have been received on the
+	// wire.
+	InvalidSourceAddressesReceived tcpip.MultiCounterStat
+
+	// PacketsDelivered is the number of incoming IP packets successfully
+	// delivered to the transport layer.
+	PacketsDelivered tcpip.MultiCounterStat
+
+	// PacketsSent is the number of IP packets sent via WritePacket.
+	PacketsSent tcpip.MultiCounterStat
+
+	// OutgoingPacketErrors is the number of IP packets which failed to
+	// write to a link-layer endpoint.
+	OutgoingPacketErrors tcpip.MultiCounterStat
+
+	// MalformedPacketsReceived is the number of IP Packets that were
+	// dropped due to the IP packet header failing validation checks.
+	MalformedPacketsReceived tcpip.MultiCounterStat
+
+	// MalformedFragmentsReceived is the number of IP Fragments that were
+	// dropped due to the fragment failing validation checks.
+	MalformedFragmentsReceived tcpip.MultiCounterStat
+
+	// IPTablesPreroutingDropped is the number of IP packets dropped in the
+	// Prerouting chain.
+	IPTablesPreroutingDropped tcpip.MultiCounterStat
+
+	// IPTablesInputDropped is the number of IP packets dropped in the
+	// Input chain.
+	IPTablesInputDropped tcpip.MultiCounterStat
+
+	// IPTablesForwardDropped is the number of IP packets dropped in the
+	// Forward chain.
+	IPTablesForwardDropped tcpip.MultiCounterStat
+
+	// IPTablesOutputDropped is the number of IP packets dropped in the
+	// Output chain.
+	IPTablesOutputDropped tcpip.MultiCounterStat
+
+	// IPTablesPostroutingDropped is the number of IP packets dropped in
+	// the Postrouting chain.
+	IPTablesPostroutingDropped tcpip.MultiCounterStat
+
+	// TODO(https://gvisor.dev/issues/5529): Move the IPv4-only option
+	// stats out of IPStats.
+
+	// OptionTimestampReceived is the number of Timestamp options seen.
+	OptionTimestampReceived tcpip.MultiCounterStat
+
+	// OptionRecordRouteReceived is the number of Record Route options
+	// seen.
+	OptionRecordRouteReceived tcpip.MultiCounterStat
+
+	// OptionRouterAlertReceived is the number of Router Alert options
+	// seen.
+	OptionRouterAlertReceived tcpip.MultiCounterStat
+
+	// OptionUnknownReceived is the number of unknown IP options seen.
+	OptionUnknownReceived tcpip.MultiCounterStat
+
+	// Forwarding collects stats related to IP forwarding.
+	Forwarding MultiCounterIPForwardingStats
+}
+
+// Init sets internal counters to track a and b counters.
+func (m *MultiCounterIPStats) Init(a, b *tcpip.IPStats) {
+	m.PacketsReceived.Init(a.PacketsReceived, b.PacketsReceived)
+	m.ValidPacketsReceived.Init(a.ValidPacketsReceived, b.ValidPacketsReceived)
+	m.DisabledPacketsReceived.Init(a.DisabledPacketsReceived, b.DisabledPacketsReceived)
+	m.InvalidDestinationAddressesReceived.Init(a.InvalidDestinationAddressesReceived, b.InvalidDestinationAddressesReceived)
+	m.InvalidSourceAddressesReceived.Init(a.InvalidSourceAddressesReceived, b.InvalidSourceAddressesReceived)
+	m.PacketsDelivered.Init(a.PacketsDelivered, b.PacketsDelivered)
+	m.PacketsSent.Init(a.PacketsSent, b.PacketsSent)
+	m.OutgoingPacketErrors.Init(a.OutgoingPacketErrors, b.OutgoingPacketErrors)
+	m.MalformedPacketsReceived.Init(a.MalformedPacketsReceived, b.MalformedPacketsReceived)
+	m.MalformedFragmentsReceived.Init(a.MalformedFragmentsReceived, b.MalformedFragmentsReceived)
+	m.IPTablesPreroutingDropped.Init(a.IPTablesPreroutingDropped, b.IPTablesPreroutingDropped)
+	m.IPTablesInputDropped.Init(a.IPTablesInputDropped, b.IPTablesInputDropped)
+	m.IPTablesForwardDropped.Init(a.IPTablesForwardDropped, b.IPTablesForwardDropped)
+	m.IPTablesOutputDropped.Init(a.IPTablesOutputDropped, b.IPTablesOutputDropped)
+	m.IPTablesPostroutingDropped.Init(a.IPTablesPostroutingDropped, b.IPTablesPostroutingDropped)
+	m.OptionTimestampReceived.Init(a.OptionTimestampReceived, b.OptionTimestampReceived)
+	m.OptionRecordRouteReceived.Init(a.OptionRecordRouteReceived, b.OptionRecordRouteReceived)
+	m.OptionRouterAlertReceived.Init(a.OptionRouterAlertReceived, b.OptionRouterAlertReceived)
+	m.OptionUnknownReceived.Init(a.OptionUnknownReceived, b.OptionUnknownReceived)
+	m.Forwarding.Init(&a.Forwarding, &b.Forwarding)
+}
+
+// LINT.ThenChange(../../../tcpip.go:IPStats)