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
85 lines
2.1 KiB
Go
85 lines
2.1 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 sniffer
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import (
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"encoding"
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"encoding/binary"
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"time"
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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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)
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type pcapHeader struct {
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// MagicNumber is the file magic number.
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MagicNumber uint32
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// VersionMajor is the major version number.
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VersionMajor uint16
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// VersionMinor is the minor version number.
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VersionMinor uint16
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// Thiszone is the GMT to local correction.
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Thiszone int32
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// Sigfigs is the accuracy of timestamps.
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Sigfigs uint32
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// Snaplen is the max length of captured packets, in octets.
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Snaplen uint32
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// Network is the data link type.
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Network uint32
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}
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var _ encoding.BinaryMarshaler = (*pcapPacket)(nil)
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type pcapPacket struct {
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timestamp time.Time
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packet *stack.PacketBuffer
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maxCaptureLen int
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}
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func (p *pcapPacket) MarshalBinary() ([]byte, error) {
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pkt := trimmedClone(p.packet)
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defer pkt.DecRef()
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packetSize := pkt.Size()
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captureLen := p.maxCaptureLen
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if packetSize < captureLen {
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captureLen = packetSize
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}
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b := make([]byte, 16+captureLen)
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binary.LittleEndian.PutUint32(b[0:4], uint32(p.timestamp.Unix()))
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binary.LittleEndian.PutUint32(b[4:8], uint32(p.timestamp.Nanosecond()/1000))
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binary.LittleEndian.PutUint32(b[8:12], uint32(captureLen))
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binary.LittleEndian.PutUint32(b[12:16], uint32(packetSize))
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w := tcpip.SliceWriter(b[16:])
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for _, v := range pkt.AsSlices() {
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if captureLen == 0 {
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break
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}
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if len(v) > captureLen {
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v = v[:captureLen]
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}
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n, err := w.Write(v)
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if err != nil {
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panic(err)
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}
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captureLen -= n
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}
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return b, nil
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}
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