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/raw/protocol.go

@@ -0,0 +1,55 @@
+// 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 raw
+
+import (
+	"github.com/sagernet/gvisor/pkg/tcpip"
+	"github.com/sagernet/gvisor/pkg/tcpip/stack"
+	"github.com/sagernet/gvisor/pkg/tcpip/transport/internal/noop"
+	"github.com/sagernet/gvisor/pkg/tcpip/transport/packet"
+	"github.com/sagernet/gvisor/pkg/waiter"
+)
+
+// EndpointFactory implements stack.RawFactory.
+//
+// +stateify savable
+type EndpointFactory struct{}
+
+// NewUnassociatedEndpoint implements stack.RawFactory.NewUnassociatedEndpoint.
+func (EndpointFactory) NewUnassociatedEndpoint(stack *stack.Stack, netProto tcpip.NetworkProtocolNumber, transProto tcpip.TransportProtocolNumber, waiterQueue *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	return newEndpoint(stack, netProto, transProto, waiterQueue, false /* associated */)
+}
+
+// NewPacketEndpoint implements stack.RawFactory.NewPacketEndpoint.
+func (EndpointFactory) NewPacketEndpoint(stack *stack.Stack, cooked bool, netProto tcpip.NetworkProtocolNumber, waiterQueue *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	return packet.NewEndpoint(stack, cooked, netProto, waiterQueue), nil
+}
+
+// CreateOnlyFactory implements stack.RawFactory. It allows creation of raw
+// endpoints that do not support reading, writing, binding, etc.
+//
+// +stateify savable
+type CreateOnlyFactory struct{}
+
+// NewUnassociatedEndpoint implements stack.RawFactory.NewUnassociatedEndpoint.
+func (CreateOnlyFactory) NewUnassociatedEndpoint(stk *stack.Stack, _ tcpip.NetworkProtocolNumber, _ tcpip.TransportProtocolNumber, _ *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	return noop.New(stk), nil
+}
+
+// NewPacketEndpoint implements stack.RawFactory.NewPacketEndpoint.
+func (CreateOnlyFactory) NewPacketEndpoint(*stack.Stack, bool, tcpip.NetworkProtocolNumber, *waiter.Queue) (tcpip.Endpoint, tcpip.Error) {
+	// This isn't needed by anything, so it isn't implemented.
+	return nil, &tcpip.ErrNotPermitted{}
+}