2c4ae3b0a4
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
96 lines
2.9 KiB
Go
96 lines
2.9 KiB
Go
// Copyright 2018 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package udp
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import (
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"context"
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"time"
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"github.com/sagernet/gvisor/pkg/log"
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"github.com/sagernet/gvisor/pkg/tcpip"
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"github.com/sagernet/gvisor/pkg/tcpip/stack"
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"github.com/sagernet/gvisor/pkg/tcpip/transport"
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)
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// saveReceivedAt is invoked by stateify.
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func (p *udpPacket) saveReceivedAt() int64 {
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return p.receivedAt.UnixNano()
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}
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// loadReceivedAt is invoked by stateify.
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func (p *udpPacket) loadReceivedAt(_ context.Context, nsec int64) {
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p.receivedAt = time.Unix(0, nsec)
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}
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// afterLoad is invoked by stateify.
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func (e *endpoint) afterLoad(ctx context.Context) {
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if e.stack.IsSaveRestoreEnabled() {
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e.stack.RegisterRestoredEndpoint(e)
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} else {
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stack.RestoreStackFromContext(ctx).RegisterRestoredEndpoint(e)
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}
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}
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// beforeSave is invoked by stateify.
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func (e *endpoint) beforeSave() {
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e.freeze()
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e.stack.RegisterResumableEndpoint(e)
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}
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// Restore implements tcpip.RestoredEndpoint.Restore.
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func (e *endpoint) Restore(s *stack.Stack) {
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e.mu.Lock()
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defer e.mu.Unlock()
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if err := e.net.Resume(s); err != nil {
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log.Warningf("Closing the UDP endpoint as it cannot be restored, err: %v", err)
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e.closeLocked()
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return
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}
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// Unfreeze the endpoint to handle packets.
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e.frozen = false
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if e.stack.IsSaveRestoreEnabled() {
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e.ops.InitHandler(e, e.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
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return
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}
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e.stack = s
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e.ops.InitHandler(e, e.stack, tcpip.GetStackSendBufferLimits, tcpip.GetStackReceiveBufferLimits)
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switch state := e.net.State(); state {
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case transport.DatagramEndpointStateInitial, transport.DatagramEndpointStateClosed:
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case transport.DatagramEndpointStateBound, transport.DatagramEndpointStateConnected:
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// Our saved state had a port, but we don't actually have a
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// reservation. We need to remove the port from our state, but still
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// pass it to the reservation machinery.
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var err tcpip.Error
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id := e.net.Info().ID
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id.LocalPort = e.localPort
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id.RemotePort = e.remotePort
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id, e.boundBindToDevice, err = e.registerWithStack(e.effectiveNetProtos, id)
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if err != nil {
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panic("registering udp endpoint with the stack failed during restore")
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}
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e.localPort = id.LocalPort
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e.remotePort = id.RemotePort
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default:
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panic("unhandled state")
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}
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}
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// Resume implements tcpip.ResumableEndpoint.Resume.
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func (e *endpoint) Resume() {
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e.thaw()
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}
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