mirror of https://github.com/status-im/op-geth.git
rpc: use go-winio instead of vendoring a named pipe implementation
This commit is contained in:
Felix Lange
parent
3a2da31c3e
commit
467bb7a719
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@ -1,6 +1,7 @@
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{
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"ImportPath": "github.com/ethereum/go-ethereum",
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"GoVersion": "go1.5.2",
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"GodepVersion": "v60",
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"Packages": [
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"./..."
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],
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@ -93,6 +94,11 @@
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"Comment": "travisish-44-ge882a96",
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"Rev": "e882a96ec18dd43fa283187b66af74497c9101c0"
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},
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{
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"ImportPath": "github.com/microsoft/go-winio",
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"Comment": "v0.2.0",
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"Rev": "9e2895e5f6c3f16473b91d37fae6e89990a4520c"
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},
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{
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"ImportPath": "github.com/nsf/termbox-go",
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"Rev": "362329b0aa6447eadd52edd8d660ec1dff470295"
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@ -0,0 +1,22 @@
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The MIT License (MIT)
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Copyright (c) 2015 Microsoft
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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@ -0,0 +1,15 @@
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# go-winio
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This repository contains utilities for efficiently performing Win32 IO operations in
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Go. Currently, this is focused on accessing named pipes and other file handles, and
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for using named pipes as a net transport.
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This code relies on IO completion ports to avoid blocking IO on system threads, allowing Go
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to reuse the thread to schedule another goroutine. This limits support to Windows Vista and
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newer operating systems. This is similar to the implementation of network sockets in Go's net
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package.
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Please see the LICENSE file for licensing information.
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Thanks to natefinch for the inspiration for this library. See https://github.com/natefinch/npipe
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for another named pipe implementation.
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@ -0,0 +1,266 @@
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package winio
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import (
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"encoding/binary"
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"errors"
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"fmt"
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"io"
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"io/ioutil"
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"os"
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"runtime"
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"syscall"
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"unicode/utf16"
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)
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//sys backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupRead
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//sys backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupWrite
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const (
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BackupData = uint32(iota + 1)
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BackupEaData
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BackupSecurity
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BackupAlternateData
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BackupLink
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BackupPropertyData
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BackupObjectId
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BackupReparseData
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BackupSparseBlock
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BackupTxfsData
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)
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const (
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StreamSparseAttributes = uint32(8)
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)
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const (
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WRITE_DAC = 0x40000
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WRITE_OWNER = 0x80000
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ACCESS_SYSTEM_SECURITY = 0x1000000
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)
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// BackupHeader represents a backup stream of a file.
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type BackupHeader struct {
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Id uint32 // The backup stream ID
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Attributes uint32 // Stream attributes
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Size int64 // The size of the stream in bytes
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Name string // The name of the stream (for BackupAlternateData only).
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Offset int64 // The offset of the stream in the file (for BackupSparseBlock only).
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}
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type win32StreamId struct {
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StreamId uint32
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Attributes uint32
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Size uint64
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NameSize uint32
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}
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// BackupStreamReader reads from a stream produced by the BackupRead Win32 API and produces a series
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// of BackupHeader values.
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type BackupStreamReader struct {
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r io.Reader
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bytesLeft int64
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}
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// NewBackupStreamReader produces a BackupStreamReader from any io.Reader.
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func NewBackupStreamReader(r io.Reader) *BackupStreamReader {
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return &BackupStreamReader{r, 0}
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}
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// Next returns the next backup stream and prepares for calls to Write(). It skips the remainder of the current stream if
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// it was not completely read.
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func (r *BackupStreamReader) Next() (*BackupHeader, error) {
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if r.bytesLeft > 0 {
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if _, err := io.Copy(ioutil.Discard, r); err != nil {
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return nil, err
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}
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}
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var wsi win32StreamId
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if err := binary.Read(r.r, binary.LittleEndian, &wsi); err != nil {
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return nil, err
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}
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hdr := &BackupHeader{
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Id: wsi.StreamId,
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Attributes: wsi.Attributes,
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Size: int64(wsi.Size),
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}
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if wsi.NameSize != 0 {
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name := make([]uint16, int(wsi.NameSize/2))
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if err := binary.Read(r.r, binary.LittleEndian, name); err != nil {
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return nil, err
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}
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hdr.Name = syscall.UTF16ToString(name)
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}
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if wsi.StreamId == BackupSparseBlock {
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if err := binary.Read(r.r, binary.LittleEndian, &hdr.Offset); err != nil {
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return nil, err
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}
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hdr.Size -= 8
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}
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r.bytesLeft = hdr.Size
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return hdr, nil
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}
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// Read reads from the current backup stream.
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func (r *BackupStreamReader) Read(b []byte) (int, error) {
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if r.bytesLeft == 0 {
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return 0, io.EOF
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}
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if int64(len(b)) > r.bytesLeft {
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b = b[:r.bytesLeft]
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}
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n, err := r.r.Read(b)
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r.bytesLeft -= int64(n)
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if err == io.EOF {
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err = io.ErrUnexpectedEOF
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} else if r.bytesLeft == 0 && err == nil {
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err = io.EOF
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}
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return n, err
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}
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// BackupStreamWriter writes a stream compatible with the BackupWrite Win32 API.
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type BackupStreamWriter struct {
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w io.Writer
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bytesLeft int64
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}
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// NewBackupStreamWriter produces a BackupStreamWriter on top of an io.Writer.
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func NewBackupStreamWriter(w io.Writer) *BackupStreamWriter {
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return &BackupStreamWriter{w, 0}
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}
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// WriteHeader writes the next backup stream header and prepares for calls to Write().
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func (w *BackupStreamWriter) WriteHeader(hdr *BackupHeader) error {
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if w.bytesLeft != 0 {
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return fmt.Errorf("missing %d bytes", w.bytesLeft)
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}
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name := utf16.Encode([]rune(hdr.Name))
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wsi := win32StreamId{
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StreamId: hdr.Id,
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Attributes: hdr.Attributes,
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Size: uint64(hdr.Size),
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NameSize: uint32(len(name) * 2),
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}
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if hdr.Id == BackupSparseBlock {
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// Include space for the int64 block offset
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wsi.Size += 8
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}
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if err := binary.Write(w.w, binary.LittleEndian, &wsi); err != nil {
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return err
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}
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if len(name) != 0 {
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if err := binary.Write(w.w, binary.LittleEndian, name); err != nil {
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return err
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}
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}
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if hdr.Id == BackupSparseBlock {
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if err := binary.Write(w.w, binary.LittleEndian, hdr.Offset); err != nil {
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return err
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}
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}
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w.bytesLeft = hdr.Size
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return nil
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}
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// Write writes to the current backup stream.
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func (w *BackupStreamWriter) Write(b []byte) (int, error) {
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if w.bytesLeft < int64(len(b)) {
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return 0, fmt.Errorf("too many bytes by %d", int64(len(b))-w.bytesLeft)
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}
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n, err := w.w.Write(b)
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w.bytesLeft -= int64(n)
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return n, err
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}
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// BackupFileReader provides an io.ReadCloser interface on top of the BackupRead Win32 API.
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type BackupFileReader struct {
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f *os.File
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includeSecurity bool
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ctx uintptr
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}
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// NewBackupFileReader returns a new BackupFileReader from a file handle. If includeSecurity is true,
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// Read will attempt to read the security descriptor of the file.
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func NewBackupFileReader(f *os.File, includeSecurity bool) *BackupFileReader {
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r := &BackupFileReader{f, includeSecurity, 0}
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runtime.SetFinalizer(r, func(r *BackupFileReader) { r.Close() })
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return r
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}
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// Read reads a backup stream from the file by calling the Win32 API BackupRead().
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func (r *BackupFileReader) Read(b []byte) (int, error) {
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var bytesRead uint32
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err := backupRead(syscall.Handle(r.f.Fd()), b, &bytesRead, false, r.includeSecurity, &r.ctx)
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if err != nil {
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return 0, &os.PathError{"BackupRead", r.f.Name(), err}
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}
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if bytesRead == 0 {
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return 0, io.EOF
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}
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return int(bytesRead), nil
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}
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// Close frees Win32 resources associated with the BackupFileReader. It does not close
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// the underlying file.
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func (r *BackupFileReader) Close() error {
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if r.ctx != 0 {
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backupRead(syscall.Handle(r.f.Fd()), nil, nil, true, false, &r.ctx)
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r.ctx = 0
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}
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return nil
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}
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// BackupFileWriter provides an io.WriteCloser interface on top of the BackupWrite Win32 API.
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type BackupFileWriter struct {
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f *os.File
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includeSecurity bool
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ctx uintptr
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}
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// NewBackupFileWrtier returns a new BackupFileWriter from a file handle. If includeSecurity is true,
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// Write() will attempt to restore the security descriptor from the stream.
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func NewBackupFileWriter(f *os.File, includeSecurity bool) *BackupFileWriter {
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w := &BackupFileWriter{f, includeSecurity, 0}
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runtime.SetFinalizer(w, func(w *BackupFileWriter) { w.Close() })
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return w
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}
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// Write restores a portion of the file using the provided backup stream.
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func (w *BackupFileWriter) Write(b []byte) (int, error) {
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var bytesWritten uint32
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err := backupWrite(syscall.Handle(w.f.Fd()), b, &bytesWritten, false, w.includeSecurity, &w.ctx)
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if err != nil {
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return 0, &os.PathError{"BackupWrite", w.f.Name(), err}
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}
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if int(bytesWritten) != len(b) {
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return int(bytesWritten), errors.New("not all bytes could be written")
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}
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return len(b), nil
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}
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// Close frees Win32 resources associated with the BackupFileWriter. It does not
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// close the underlying file.
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func (w *BackupFileWriter) Close() error {
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if w.ctx != 0 {
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backupWrite(syscall.Handle(w.f.Fd()), nil, nil, true, false, &w.ctx)
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w.ctx = 0
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}
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return nil
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}
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// OpenForBackup opens a file or directory, potentially skipping access checks if the backup
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// or restore privileges have been acquired.
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//
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// If the file opened was a directory, it cannot be used with Readdir().
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func OpenForBackup(path string, access uint32, share uint32, createmode uint32) (*os.File, error) {
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winPath, err := syscall.UTF16FromString(path)
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if err != nil {
|
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return nil, err
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}
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h, err := syscall.CreateFile(&winPath[0], access, share, nil, createmode, syscall.FILE_FLAG_BACKUP_SEMANTICS, 0)
|
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if err != nil {
|
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err = &os.PathError{Op: "open", Path: path, Err: err}
|
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return nil, err
|
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}
|
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return os.NewFile(uintptr(h), path), nil
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||||
}
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|
|
@ -0,0 +1,219 @@
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package winio
|
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|
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import (
|
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"errors"
|
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"io"
|
||||
"runtime"
|
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"sync"
|
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"syscall"
|
||||
"time"
|
||||
)
|
||||
|
||||
//sys cancelIoEx(file syscall.Handle, o *syscall.Overlapped) (err error) = CancelIoEx
|
||||
//sys createIoCompletionPort(file syscall.Handle, port syscall.Handle, key uintptr, threadCount uint32) (newport syscall.Handle, err error) = CreateIoCompletionPort
|
||||
//sys getQueuedCompletionStatus(port syscall.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) = GetQueuedCompletionStatus
|
||||
//sys setFileCompletionNotificationModes(h syscall.Handle, flags uint8) (err error) = SetFileCompletionNotificationModes
|
||||
//sys timeBeginPeriod(period uint32) (n int32) = winmm.timeBeginPeriod
|
||||
|
||||
const (
|
||||
cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS = 1
|
||||
cFILE_SKIP_SET_EVENT_ON_HANDLE = 2
|
||||
)
|
||||
|
||||
var (
|
||||
ErrFileClosed = errors.New("file has already been closed")
|
||||
ErrTimeout = &timeoutError{}
|
||||
)
|
||||
|
||||
type timeoutError struct{}
|
||||
|
||||
func (e *timeoutError) Error() string { return "i/o timeout" }
|
||||
func (e *timeoutError) Timeout() bool { return true }
|
||||
func (e *timeoutError) Temporary() bool { return true }
|
||||
|
||||
var ioInitOnce sync.Once
|
||||
var ioCompletionPort syscall.Handle
|
||||
|
||||
// ioResult contains the result of an asynchronous IO operation
|
||||
type ioResult struct {
|
||||
bytes uint32
|
||||
err error
|
||||
}
|
||||
|
||||
// ioOperation represents an outstanding asynchronous Win32 IO
|
||||
type ioOperation struct {
|
||||
o syscall.Overlapped
|
||||
ch chan ioResult
|
||||
}
|
||||
|
||||
func initIo() {
|
||||
h, err := createIoCompletionPort(syscall.InvalidHandle, 0, 0, 0xffffffff)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
ioCompletionPort = h
|
||||
go ioCompletionProcessor(h)
|
||||
}
|
||||
|
||||
// win32File implements Reader, Writer, and Closer on a Win32 handle without blocking in a syscall.
|
||||
// It takes ownership of this handle and will close it if it is garbage collected.
|
||||
type win32File struct {
|
||||
handle syscall.Handle
|
||||
wg sync.WaitGroup
|
||||
closing bool
|
||||
readDeadline time.Time
|
||||
writeDeadline time.Time
|
||||
}
|
||||
|
||||
// makeWin32File makes a new win32File from an existing file handle
|
||||
func makeWin32File(h syscall.Handle) (*win32File, error) {
|
||||
f := &win32File{handle: h}
|
||||
ioInitOnce.Do(initIo)
|
||||
_, err := createIoCompletionPort(h, ioCompletionPort, 0, 0xffffffff)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
err = setFileCompletionNotificationModes(h, cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS|cFILE_SKIP_SET_EVENT_ON_HANDLE)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
runtime.SetFinalizer(f, (*win32File).closeHandle)
|
||||
return f, nil
|
||||
}
|
||||
|
||||
func MakeOpenFile(h syscall.Handle) (io.ReadWriteCloser, error) {
|
||||
return makeWin32File(h)
|
||||
}
|
||||
|
||||
// closeHandle closes the resources associated with a Win32 handle
|
||||
func (f *win32File) closeHandle() {
|
||||
if !f.closing {
|
||||
// cancel all IO and wait for it to complete
|
||||
f.closing = true
|
||||
cancelIoEx(f.handle, nil)
|
||||
f.wg.Wait()
|
||||
// at this point, no new IO can start
|
||||
syscall.Close(f.handle)
|
||||
f.handle = 0
|
||||
}
|
||||
}
|
||||
|
||||
// Close closes a win32File.
|
||||
func (f *win32File) Close() error {
|
||||
f.closeHandle()
|
||||
runtime.SetFinalizer(f, nil)
|
||||
return nil
|
||||
}
|
||||
|
||||
// prepareIo prepares for a new IO operation
|
||||
func (f *win32File) prepareIo() (*ioOperation, error) {
|
||||
f.wg.Add(1)
|
||||
if f.closing {
|
||||
return nil, ErrFileClosed
|
||||
}
|
||||
c := &ioOperation{}
|
||||
c.ch = make(chan ioResult)
|
||||
return c, nil
|
||||
}
|
||||
|
||||
// ioCompletionProcessor processes completed async IOs forever
|
||||
func ioCompletionProcessor(h syscall.Handle) {
|
||||
// Set the timer resolution to 1. This fixes a performance regression in golang 1.6.
|
||||
timeBeginPeriod(1)
|
||||
for {
|
||||
var bytes uint32
|
||||
var key uintptr
|
||||
var op *ioOperation
|
||||
err := getQueuedCompletionStatus(h, &bytes, &key, &op, syscall.INFINITE)
|
||||
if op == nil {
|
||||
panic(err)
|
||||
}
|
||||
op.ch <- ioResult{bytes, err}
|
||||
}
|
||||
}
|
||||
|
||||
// asyncIo processes the return value from ReadFile or WriteFile, blocking until
|
||||
// the operation has actually completed.
|
||||
func (f *win32File) asyncIo(c *ioOperation, deadline time.Time, bytes uint32, err error) (int, error) {
|
||||
if err != syscall.ERROR_IO_PENDING {
|
||||
f.wg.Done()
|
||||
return int(bytes), err
|
||||
} else {
|
||||
var r ioResult
|
||||
wait := true
|
||||
timedout := false
|
||||
if f.closing {
|
||||
cancelIoEx(f.handle, &c.o)
|
||||
} else if !deadline.IsZero() {
|
||||
now := time.Now()
|
||||
if !deadline.After(now) {
|
||||
timedout = true
|
||||
} else {
|
||||
timeout := time.After(deadline.Sub(now))
|
||||
select {
|
||||
case r = <-c.ch:
|
||||
wait = false
|
||||
case <-timeout:
|
||||
timedout = true
|
||||
}
|
||||
}
|
||||
}
|
||||
if timedout {
|
||||
cancelIoEx(f.handle, &c.o)
|
||||
}
|
||||
if wait {
|
||||
r = <-c.ch
|
||||
}
|
||||
err = r.err
|
||||
if err == syscall.ERROR_OPERATION_ABORTED {
|
||||
if f.closing {
|
||||
err = ErrFileClosed
|
||||
} else if timedout {
|
||||
err = ErrTimeout
|
||||
}
|
||||
}
|
||||
f.wg.Done()
|
||||
return int(r.bytes), err
|
||||
}
|
||||
}
|
||||
|
||||
// Read reads from a file handle.
|
||||
func (f *win32File) Read(b []byte) (int, error) {
|
||||
c, err := f.prepareIo()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
var bytes uint32
|
||||
err = syscall.ReadFile(f.handle, b, &bytes, &c.o)
|
||||
n, err := f.asyncIo(c, f.readDeadline, bytes, err)
|
||||
|
||||
// Handle EOF conditions.
|
||||
if err == nil && n == 0 && len(b) != 0 {
|
||||
return 0, io.EOF
|
||||
} else if err == syscall.ERROR_BROKEN_PIPE {
|
||||
return 0, io.EOF
|
||||
} else {
|
||||
return n, err
|
||||
}
|
||||
}
|
||||
|
||||
// Write writes to a file handle.
|
||||
func (f *win32File) Write(b []byte) (int, error) {
|
||||
c, err := f.prepareIo()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
var bytes uint32
|
||||
err = syscall.WriteFile(f.handle, b, &bytes, &c.o)
|
||||
return f.asyncIo(c, f.writeDeadline, bytes, err)
|
||||
}
|
||||
|
||||
func (f *win32File) SetReadDeadline(t time.Time) error {
|
||||
f.readDeadline = t
|
||||
return nil
|
||||
}
|
||||
|
||||
func (f *win32File) SetWriteDeadline(t time.Time) error {
|
||||
f.writeDeadline = t
|
||||
return nil
|
||||
}
|
||||
|
|
@ -0,0 +1,54 @@
|
|||
package winio
|
||||
|
||||
import (
|
||||
"os"
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
//sys getFileInformationByHandleEx(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) = GetFileInformationByHandleEx
|
||||
//sys setFileInformationByHandle(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) = SetFileInformationByHandle
|
||||
|
||||
const (
|
||||
fileBasicInfo = 0
|
||||
fileIDInfo = 0x12
|
||||
)
|
||||
|
||||
// FileBasicInfo contains file access time and file attributes information.
|
||||
type FileBasicInfo struct {
|
||||
CreationTime, LastAccessTime, LastWriteTime, ChangeTime syscall.Filetime
|
||||
FileAttributes uintptr // includes padding
|
||||
}
|
||||
|
||||
// GetFileBasicInfo retrieves times and attributes for a file.
|
||||
func GetFileBasicInfo(f *os.File) (*FileBasicInfo, error) {
|
||||
bi := &FileBasicInfo{}
|
||||
if err := getFileInformationByHandleEx(syscall.Handle(f.Fd()), fileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
|
||||
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
||||
}
|
||||
return bi, nil
|
||||
}
|
||||
|
||||
// SetFileBasicInfo sets times and attributes for a file.
|
||||
func SetFileBasicInfo(f *os.File, bi *FileBasicInfo) error {
|
||||
if err := setFileInformationByHandle(syscall.Handle(f.Fd()), fileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
|
||||
return &os.PathError{Op: "SetFileInformationByHandle", Path: f.Name(), Err: err}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// FileIDInfo contains the volume serial number and file ID for a file. This pair should be
|
||||
// unique on a system.
|
||||
type FileIDInfo struct {
|
||||
VolumeSerialNumber uint64
|
||||
FileID [16]byte
|
||||
}
|
||||
|
||||
// GetFileID retrieves the unique (volume, file ID) pair for a file.
|
||||
func GetFileID(f *os.File) (*FileIDInfo, error) {
|
||||
fileID := &FileIDInfo{}
|
||||
if err := getFileInformationByHandleEx(syscall.Handle(f.Fd()), fileIDInfo, (*byte)(unsafe.Pointer(fileID)), uint32(unsafe.Sizeof(*fileID))); err != nil {
|
||||
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
|
||||
}
|
||||
return fileID, nil
|
||||
}
|
||||
|
|
@ -0,0 +1,398 @@
|
|||
package winio
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"io"
|
||||
"net"
|
||||
"os"
|
||||
"syscall"
|
||||
"time"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
//sys connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) = ConnectNamedPipe
|
||||
//sys createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *securityAttributes) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateNamedPipeW
|
||||
//sys createFile(name string, access uint32, mode uint32, sa *securityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateFileW
|
||||
//sys waitNamedPipe(name string, timeout uint32) (err error) = WaitNamedPipeW
|
||||
//sys getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) = GetNamedPipeInfo
|
||||
//sys getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) = GetNamedPipeHandleStateW
|
||||
|
||||
type securityAttributes struct {
|
||||
Length uint32
|
||||
SecurityDescriptor *byte
|
||||
InheritHandle uint32
|
||||
}
|
||||
|
||||
const (
|
||||
cERROR_PIPE_BUSY = syscall.Errno(231)
|
||||
cERROR_PIPE_CONNECTED = syscall.Errno(535)
|
||||
cERROR_SEM_TIMEOUT = syscall.Errno(121)
|
||||
|
||||
cPIPE_ACCESS_DUPLEX = 0x3
|
||||
cFILE_FLAG_FIRST_PIPE_INSTANCE = 0x80000
|
||||
cSECURITY_SQOS_PRESENT = 0x100000
|
||||
cSECURITY_ANONYMOUS = 0
|
||||
|
||||
cPIPE_REJECT_REMOTE_CLIENTS = 0x8
|
||||
|
||||
cPIPE_UNLIMITED_INSTANCES = 255
|
||||
|
||||
cNMPWAIT_USE_DEFAULT_WAIT = 0
|
||||
cNMPWAIT_NOWAIT = 1
|
||||
|
||||
cPIPE_TYPE_MESSAGE = 4
|
||||
|
||||
cPIPE_READMODE_MESSAGE = 2
|
||||
)
|
||||
|
||||
var (
|
||||
// ErrPipeListenerClosed is returned for pipe operations on listeners that have been closed.
|
||||
// This error should match net.errClosing since docker takes a dependency on its text.
|
||||
ErrPipeListenerClosed = errors.New("use of closed network connection")
|
||||
|
||||
errPipeWriteClosed = errors.New("pipe has been closed for write")
|
||||
)
|
||||
|
||||
type win32Pipe struct {
|
||||
*win32File
|
||||
path string
|
||||
}
|
||||
|
||||
type win32MessageBytePipe struct {
|
||||
win32Pipe
|
||||
writeClosed bool
|
||||
readEOF bool
|
||||
}
|
||||
|
||||
type pipeAddress string
|
||||
|
||||
func (f *win32Pipe) LocalAddr() net.Addr {
|
||||
return pipeAddress(f.path)
|
||||
}
|
||||
|
||||
func (f *win32Pipe) RemoteAddr() net.Addr {
|
||||
return pipeAddress(f.path)
|
||||
}
|
||||
|
||||
func (f *win32Pipe) SetDeadline(t time.Time) error {
|
||||
f.SetReadDeadline(t)
|
||||
f.SetWriteDeadline(t)
|
||||
return nil
|
||||
}
|
||||
|
||||
// CloseWrite closes the write side of a message pipe in byte mode.
|
||||
func (f *win32MessageBytePipe) CloseWrite() error {
|
||||
if f.writeClosed {
|
||||
return errPipeWriteClosed
|
||||
}
|
||||
_, err := f.win32File.Write(nil)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
f.writeClosed = true
|
||||
return nil
|
||||
}
|
||||
|
||||
// Write writes bytes to a message pipe in byte mode. Zero-byte writes are ignored, since
|
||||
// they are used to implement CloseWrite().
|
||||
func (f *win32MessageBytePipe) Write(b []byte) (int, error) {
|
||||
if f.writeClosed {
|
||||
return 0, errPipeWriteClosed
|
||||
}
|
||||
if len(b) == 0 {
|
||||
return 0, nil
|
||||
}
|
||||
return f.win32File.Write(b)
|
||||
}
|
||||
|
||||
// Read reads bytes from a message pipe in byte mode. A read of a zero-byte message on a message
|
||||
// mode pipe will return io.EOF, as will all subsequent reads.
|
||||
func (f *win32MessageBytePipe) Read(b []byte) (int, error) {
|
||||
if f.readEOF {
|
||||
return 0, io.EOF
|
||||
}
|
||||
n, err := f.win32File.Read(b)
|
||||
if err == io.EOF {
|
||||
// If this was the result of a zero-byte read, then
|
||||
// it is possible that the read was due to a zero-size
|
||||
// message. Since we are simulating CloseWrite with a
|
||||
// zero-byte message, ensure that all future Read() calls
|
||||
// also return EOF.
|
||||
f.readEOF = true
|
||||
}
|
||||
return n, err
|
||||
}
|
||||
|
||||
func (s pipeAddress) Network() string {
|
||||
return "pipe"
|
||||
}
|
||||
|
||||
func (s pipeAddress) String() string {
|
||||
return string(s)
|
||||
}
|
||||
|
||||
// DialPipe connects to a named pipe by path, timing out if the connection
|
||||
// takes longer than the specified duration. If timeout is nil, then the timeout
|
||||
// is the default timeout established by the pipe server.
|
||||
func DialPipe(path string, timeout *time.Duration) (net.Conn, error) {
|
||||
var absTimeout time.Time
|
||||
if timeout != nil {
|
||||
absTimeout = time.Now().Add(*timeout)
|
||||
}
|
||||
var err error
|
||||
var h syscall.Handle
|
||||
for {
|
||||
h, err = createFile(path, syscall.GENERIC_READ|syscall.GENERIC_WRITE, 0, nil, syscall.OPEN_EXISTING, syscall.FILE_FLAG_OVERLAPPED|cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
|
||||
if err != cERROR_PIPE_BUSY {
|
||||
break
|
||||
}
|
||||
now := time.Now()
|
||||
var ms uint32
|
||||
if absTimeout.IsZero() {
|
||||
ms = cNMPWAIT_USE_DEFAULT_WAIT
|
||||
} else if now.After(absTimeout) {
|
||||
ms = cNMPWAIT_NOWAIT
|
||||
} else {
|
||||
ms = uint32(absTimeout.Sub(now).Nanoseconds() / 1000 / 1000)
|
||||
}
|
||||
err = waitNamedPipe(path, ms)
|
||||
if err != nil {
|
||||
if err == cERROR_SEM_TIMEOUT {
|
||||
return nil, ErrTimeout
|
||||
}
|
||||
break
|
||||
}
|
||||
}
|
||||
if err != nil {
|
||||
return nil, &os.PathError{Op: "open", Path: path, Err: err}
|
||||
}
|
||||
|
||||
var flags uint32
|
||||
err = getNamedPipeInfo(h, &flags, nil, nil, nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var state uint32
|
||||
err = getNamedPipeHandleState(h, &state, nil, nil, nil, nil, 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if state&cPIPE_READMODE_MESSAGE != 0 {
|
||||
return nil, &os.PathError{Op: "open", Path: path, Err: errors.New("message readmode pipes not supported")}
|
||||
}
|
||||
|
||||
f, err := makeWin32File(h)
|
||||
if err != nil {
|
||||
syscall.Close(h)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// If the pipe is in message mode, return a message byte pipe, which
|
||||
// supports CloseWrite().
|
||||
if flags&cPIPE_TYPE_MESSAGE != 0 {
|
||||
return &win32MessageBytePipe{
|
||||
win32Pipe: win32Pipe{win32File: f, path: path},
|
||||
}, nil
|
||||
}
|
||||
return &win32Pipe{win32File: f, path: path}, nil
|
||||
}
|
||||
|
||||
type acceptResponse struct {
|
||||
f *win32File
|
||||
err error
|
||||
}
|
||||
|
||||
type win32PipeListener struct {
|
||||
firstHandle syscall.Handle
|
||||
path string
|
||||
securityDescriptor []byte
|
||||
config PipeConfig
|
||||
acceptCh chan (chan acceptResponse)
|
||||
closeCh chan int
|
||||
doneCh chan int
|
||||
}
|
||||
|
||||
func makeServerPipeHandle(path string, securityDescriptor []byte, c *PipeConfig, first bool) (syscall.Handle, error) {
|
||||
var flags uint32 = cPIPE_ACCESS_DUPLEX | syscall.FILE_FLAG_OVERLAPPED
|
||||
if first {
|
||||
flags |= cFILE_FLAG_FIRST_PIPE_INSTANCE
|
||||
}
|
||||
|
||||
var mode uint32 = cPIPE_REJECT_REMOTE_CLIENTS
|
||||
if c.MessageMode {
|
||||
mode |= cPIPE_TYPE_MESSAGE
|
||||
}
|
||||
|
||||
var sa securityAttributes
|
||||
sa.Length = uint32(unsafe.Sizeof(sa))
|
||||
if securityDescriptor != nil {
|
||||
sa.SecurityDescriptor = &securityDescriptor[0]
|
||||
}
|
||||
h, err := createNamedPipe(path, flags, mode, cPIPE_UNLIMITED_INSTANCES, uint32(c.OutputBufferSize), uint32(c.InputBufferSize), 0, &sa)
|
||||
if err != nil {
|
||||
return 0, &os.PathError{Op: "open", Path: path, Err: err}
|
||||
}
|
||||
return h, nil
|
||||
}
|
||||
|
||||
func (l *win32PipeListener) makeServerPipe() (*win32File, error) {
|
||||
h, err := makeServerPipeHandle(l.path, l.securityDescriptor, &l.config, false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
f, err := makeWin32File(h)
|
||||
if err != nil {
|
||||
syscall.Close(h)
|
||||
return nil, err
|
||||
}
|
||||
return f, nil
|
||||
}
|
||||
|
||||
func (l *win32PipeListener) listenerRoutine() {
|
||||
closed := false
|
||||
for !closed {
|
||||
select {
|
||||
case <-l.closeCh:
|
||||
closed = true
|
||||
case responseCh := <-l.acceptCh:
|
||||
p, err := l.makeServerPipe()
|
||||
if err == nil {
|
||||
// Wait for the client to connect.
|
||||
ch := make(chan error)
|
||||
go func() {
|
||||
ch <- connectPipe(p)
|
||||
}()
|
||||
select {
|
||||
case err = <-ch:
|
||||
if err != nil {
|
||||
p.Close()
|
||||
p = nil
|
||||
}
|
||||
case <-l.closeCh:
|
||||
// Abort the connect request by closing the handle.
|
||||
p.Close()
|
||||
p = nil
|
||||
err = <-ch
|
||||
if err == nil || err == ErrFileClosed {
|
||||
err = ErrPipeListenerClosed
|
||||
}
|
||||
closed = true
|
||||
}
|
||||
}
|
||||
responseCh <- acceptResponse{p, err}
|
||||
}
|
||||
}
|
||||
syscall.Close(l.firstHandle)
|
||||
l.firstHandle = 0
|
||||
// Notify Close() and Accept() callers that the handle has been closed.
|
||||
close(l.doneCh)
|
||||
}
|
||||
|
||||
// PipeConfig contain configuration for the pipe listener.
|
||||
type PipeConfig struct {
|
||||
// SecurityDescriptor contains a Windows security descriptor in SDDL format.
|
||||
SecurityDescriptor string
|
||||
|
||||
// MessageMode determines whether the pipe is in byte or message mode. In either
|
||||
// case the pipe is read in byte mode by default. The only practical difference in
|
||||
// this implementation is that CloseWrite() is only supported for message mode pipes;
|
||||
// CloseWrite() is implemented as a zero-byte write, but zero-byte writes are only
|
||||
// transferred to the reader (and returned as io.EOF in this implementation)
|
||||
// when the pipe is in message mode.
|
||||
MessageMode bool
|
||||
|
||||
// InputBufferSize specifies the size the input buffer, in bytes.
|
||||
InputBufferSize int32
|
||||
|
||||
// OutputBufferSize specifies the size the input buffer, in bytes.
|
||||
OutputBufferSize int32
|
||||
}
|
||||
|
||||
// ListenPipe creates a listener on a Windows named pipe path, e.g. \\.\pipe\mypipe.
|
||||
// The pipe must not already exist.
|
||||
func ListenPipe(path string, c *PipeConfig) (net.Listener, error) {
|
||||
var (
|
||||
sd []byte
|
||||
err error
|
||||
)
|
||||
if c == nil {
|
||||
c = &PipeConfig{}
|
||||
}
|
||||
if c.SecurityDescriptor != "" {
|
||||
sd, err = SddlToSecurityDescriptor(c.SecurityDescriptor)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
h, err := makeServerPipeHandle(path, sd, c, true)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// Immediately open and then close a client handle so that the named pipe is
|
||||
// created but not currently accepting connections.
|
||||
h2, err := createFile(path, 0, 0, nil, syscall.OPEN_EXISTING, cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
|
||||
if err != nil {
|
||||
syscall.Close(h)
|
||||
return nil, err
|
||||
}
|
||||
syscall.Close(h2)
|
||||
l := &win32PipeListener{
|
||||
firstHandle: h,
|
||||
path: path,
|
||||
securityDescriptor: sd,
|
||||
config: *c,
|
||||
acceptCh: make(chan (chan acceptResponse)),
|
||||
closeCh: make(chan int),
|
||||
doneCh: make(chan int),
|
||||
}
|
||||
go l.listenerRoutine()
|
||||
return l, nil
|
||||
}
|
||||
|
||||
func connectPipe(p *win32File) error {
|
||||
c, err := p.prepareIo()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
err = connectNamedPipe(p.handle, &c.o)
|
||||
_, err = p.asyncIo(c, time.Time{}, 0, err)
|
||||
if err != nil && err != cERROR_PIPE_CONNECTED {
|
||||
return err
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (l *win32PipeListener) Accept() (net.Conn, error) {
|
||||
ch := make(chan acceptResponse)
|
||||
select {
|
||||
case l.acceptCh <- ch:
|
||||
response := <-ch
|
||||
err := response.err
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if l.config.MessageMode {
|
||||
return &win32MessageBytePipe{
|
||||
win32Pipe: win32Pipe{win32File: response.f, path: l.path},
|
||||
}, nil
|
||||
}
|
||||
return &win32Pipe{win32File: response.f, path: l.path}, nil
|
||||
case <-l.doneCh:
|
||||
return nil, ErrPipeListenerClosed
|
||||
}
|
||||
}
|
||||
|
||||
func (l *win32PipeListener) Close() error {
|
||||
select {
|
||||
case l.closeCh <- 1:
|
||||
<-l.doneCh
|
||||
case <-l.doneCh:
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func (l *win32PipeListener) Addr() net.Addr {
|
||||
return pipeAddress(l.path)
|
||||
}
|
||||
|
|
@ -0,0 +1,150 @@
|
|||
package winio
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/binary"
|
||||
"fmt"
|
||||
"runtime"
|
||||
"syscall"
|
||||
"unicode/utf16"
|
||||
)
|
||||
|
||||
//sys adjustTokenPrivileges(token syscall.Handle, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) [true] = advapi32.AdjustTokenPrivileges
|
||||
//sys impersonateSelf(level uint32) (err error) = advapi32.ImpersonateSelf
|
||||
//sys revertToSelf() (err error) = advapi32.RevertToSelf
|
||||
//sys openThreadToken(thread syscall.Handle, accessMask uint32, openAsSelf bool, token *syscall.Handle) (err error) = advapi32.OpenThreadToken
|
||||
//sys getCurrentThread() (h syscall.Handle) = GetCurrentThread
|
||||
//sys lookupPrivilegeValue(systemName string, name string, luid *uint64) (err error) = advapi32.LookupPrivilegeValueW
|
||||
//sys lookupPrivilegeName(systemName string, luid *uint64, buffer *uint16, size *uint32) (err error) = advapi32.LookupPrivilegeNameW
|
||||
//sys lookupPrivilegeDisplayName(systemName string, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) = advapi32.LookupPrivilegeDisplayNameW
|
||||
|
||||
const (
|
||||
SE_PRIVILEGE_ENABLED = 2
|
||||
|
||||
ERROR_NOT_ALL_ASSIGNED syscall.Errno = 1300
|
||||
|
||||
SeBackupPrivilege = "SeBackupPrivilege"
|
||||
SeRestorePrivilege = "SeRestorePrivilege"
|
||||
)
|
||||
|
||||
const (
|
||||
securityAnonymous = iota
|
||||
securityIdentification
|
||||
securityImpersonation
|
||||
securityDelegation
|
||||
)
|
||||
|
||||
type PrivilegeError struct {
|
||||
privileges []uint64
|
||||
}
|
||||
|
||||
func (e *PrivilegeError) Error() string {
|
||||
s := ""
|
||||
if len(e.privileges) > 1 {
|
||||
s = "Could not enable privileges "
|
||||
} else {
|
||||
s = "Could not enable privilege "
|
||||
}
|
||||
for i, p := range e.privileges {
|
||||
if i != 0 {
|
||||
s += ", "
|
||||
}
|
||||
s += `"`
|
||||
s += getPrivilegeName(p)
|
||||
s += `"`
|
||||
}
|
||||
return s
|
||||
}
|
||||
|
||||
func RunWithPrivilege(name string, fn func() error) error {
|
||||
return RunWithPrivileges([]string{name}, fn)
|
||||
}
|
||||
|
||||
func RunWithPrivileges(names []string, fn func() error) error {
|
||||
var privileges []uint64
|
||||
for _, name := range names {
|
||||
p := uint64(0)
|
||||
err := lookupPrivilegeValue("", name, &p)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
privileges = append(privileges, p)
|
||||
}
|
||||
runtime.LockOSThread()
|
||||
defer runtime.UnlockOSThread()
|
||||
token, err := newThreadToken()
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
defer releaseThreadToken(token)
|
||||
err = adjustPrivileges(token, privileges)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
return fn()
|
||||
}
|
||||
|
||||
func adjustPrivileges(token syscall.Handle, privileges []uint64) error {
|
||||
var b bytes.Buffer
|
||||
binary.Write(&b, binary.LittleEndian, uint32(len(privileges)))
|
||||
for _, p := range privileges {
|
||||
binary.Write(&b, binary.LittleEndian, p)
|
||||
binary.Write(&b, binary.LittleEndian, uint32(SE_PRIVILEGE_ENABLED))
|
||||
}
|
||||
prevState := make([]byte, b.Len())
|
||||
reqSize := uint32(0)
|
||||
success, err := adjustTokenPrivileges(token, false, &b.Bytes()[0], uint32(len(prevState)), &prevState[0], &reqSize)
|
||||
if !success {
|
||||
return err
|
||||
}
|
||||
if err == ERROR_NOT_ALL_ASSIGNED {
|
||||
return &PrivilegeError{privileges}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func getPrivilegeName(luid uint64) string {
|
||||
var nameBuffer [256]uint16
|
||||
bufSize := uint32(len(nameBuffer))
|
||||
err := lookupPrivilegeName("", &luid, &nameBuffer[0], &bufSize)
|
||||
if err != nil {
|
||||
return fmt.Sprintf("<unknown privilege %d>", luid)
|
||||
}
|
||||
|
||||
var displayNameBuffer [256]uint16
|
||||
displayBufSize := uint32(len(displayNameBuffer))
|
||||
var langId uint32
|
||||
err = lookupPrivilegeDisplayName("", &nameBuffer[0], &displayNameBuffer[0], &displayBufSize, &langId)
|
||||
if err != nil {
|
||||
return fmt.Sprintf("<unknown privilege %s>", utf16.Decode(nameBuffer[:bufSize]))
|
||||
}
|
||||
|
||||
return string(utf16.Decode(displayNameBuffer[:displayBufSize]))
|
||||
}
|
||||
|
||||
func newThreadToken() (syscall.Handle, error) {
|
||||
err := impersonateSelf(securityImpersonation)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
return 0, err
|
||||
}
|
||||
|
||||
var token syscall.Handle
|
||||
err = openThreadToken(getCurrentThread(), syscall.TOKEN_ADJUST_PRIVILEGES|syscall.TOKEN_QUERY, false, &token)
|
||||
if err != nil {
|
||||
rerr := revertToSelf()
|
||||
if rerr != nil {
|
||||
panic(rerr)
|
||||
}
|
||||
return 0, err
|
||||
}
|
||||
return token, nil
|
||||
}
|
||||
|
||||
func releaseThreadToken(h syscall.Handle) {
|
||||
err := revertToSelf()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
syscall.Close(h)
|
||||
}
|
||||
|
|
@ -0,0 +1,124 @@
|
|||
package winio
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/binary"
|
||||
"fmt"
|
||||
"strings"
|
||||
"unicode/utf16"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const (
|
||||
reparseTagMountPoint = 0xA0000003
|
||||
reparseTagSymlink = 0xA000000C
|
||||
)
|
||||
|
||||
type reparseDataBuffer struct {
|
||||
ReparseTag uint32
|
||||
ReparseDataLength uint16
|
||||
Reserved uint16
|
||||
SubstituteNameOffset uint16
|
||||
SubstituteNameLength uint16
|
||||
PrintNameOffset uint16
|
||||
PrintNameLength uint16
|
||||
}
|
||||
|
||||
// ReparsePoint describes a Win32 symlink or mount point.
|
||||
type ReparsePoint struct {
|
||||
Target string
|
||||
IsMountPoint bool
|
||||
}
|
||||
|
||||
// UnsupportedReparsePointError is returned when trying to decode a non-symlink or
|
||||
// mount point reparse point.
|
||||
type UnsupportedReparsePointError struct {
|
||||
Tag uint32
|
||||
}
|
||||
|
||||
func (e *UnsupportedReparsePointError) Error() string {
|
||||
return fmt.Sprintf("unsupported reparse point %x", e.Tag)
|
||||
}
|
||||
|
||||
// DecodeReparsePoint decodes a Win32 REPARSE_DATA_BUFFER structure containing either a symlink
|
||||
// or a mount point.
|
||||
func DecodeReparsePoint(b []byte) (*ReparsePoint, error) {
|
||||
isMountPoint := false
|
||||
tag := binary.LittleEndian.Uint32(b[0:4])
|
||||
switch tag {
|
||||
case reparseTagMountPoint:
|
||||
isMountPoint = true
|
||||
case reparseTagSymlink:
|
||||
default:
|
||||
return nil, &UnsupportedReparsePointError{tag}
|
||||
}
|
||||
nameOffset := 16 + binary.LittleEndian.Uint16(b[12:14])
|
||||
if !isMountPoint {
|
||||
nameOffset += 4
|
||||
}
|
||||
nameLength := binary.LittleEndian.Uint16(b[14:16])
|
||||
name := make([]uint16, nameLength/2)
|
||||
err := binary.Read(bytes.NewReader(b[nameOffset:nameOffset+nameLength]), binary.LittleEndian, &name)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &ReparsePoint{string(utf16.Decode(name)), isMountPoint}, nil
|
||||
}
|
||||
|
||||
func isDriveLetter(c byte) bool {
|
||||
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
|
||||
}
|
||||
|
||||
// EncodeReparsePoint encodes a Win32 REPARSE_DATA_BUFFER structure describing a symlink or
|
||||
// mount point.
|
||||
func EncodeReparsePoint(rp *ReparsePoint) []byte {
|
||||
// Generate an NT path and determine if this is a relative path.
|
||||
var ntTarget string
|
||||
relative := false
|
||||
if strings.HasPrefix(rp.Target, `\\?\`) {
|
||||
ntTarget = rp.Target
|
||||
} else if strings.HasPrefix(rp.Target, `\\`) {
|
||||
ntTarget = `\??\UNC\` + rp.Target[2:]
|
||||
} else if len(rp.Target) >= 2 && isDriveLetter(rp.Target[0]) && rp.Target[1] == ':' {
|
||||
ntTarget = `\??\` + rp.Target
|
||||
} else {
|
||||
ntTarget = rp.Target
|
||||
relative = true
|
||||
}
|
||||
|
||||
// The paths must be NUL-terminated even though they are counted strings.
|
||||
target16 := utf16.Encode([]rune(rp.Target + "\x00"))
|
||||
ntTarget16 := utf16.Encode([]rune(ntTarget + "\x00"))
|
||||
|
||||
size := int(unsafe.Sizeof(reparseDataBuffer{})) - 8
|
||||
size += len(ntTarget16)*2 + len(target16)*2
|
||||
|
||||
tag := uint32(reparseTagMountPoint)
|
||||
if !rp.IsMountPoint {
|
||||
tag = reparseTagSymlink
|
||||
size += 4 // Add room for symlink flags
|
||||
}
|
||||
|
||||
data := reparseDataBuffer{
|
||||
ReparseTag: tag,
|
||||
ReparseDataLength: uint16(size),
|
||||
SubstituteNameOffset: 0,
|
||||
SubstituteNameLength: uint16((len(ntTarget16) - 1) * 2),
|
||||
PrintNameOffset: uint16(len(ntTarget16) * 2),
|
||||
PrintNameLength: uint16((len(target16) - 1) * 2),
|
||||
}
|
||||
|
||||
var b bytes.Buffer
|
||||
binary.Write(&b, binary.LittleEndian, &data)
|
||||
if !rp.IsMountPoint {
|
||||
flags := uint32(0)
|
||||
if relative {
|
||||
flags |= 1
|
||||
}
|
||||
binary.Write(&b, binary.LittleEndian, flags)
|
||||
}
|
||||
|
||||
binary.Write(&b, binary.LittleEndian, ntTarget16)
|
||||
binary.Write(&b, binary.LittleEndian, target16)
|
||||
return b.Bytes()
|
||||
}
|
||||
|
|
@ -0,0 +1,96 @@
|
|||
package winio
|
||||
|
||||
import (
|
||||
"syscall"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
//sys lookupAccountName(systemName *uint16, accountName string, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) = advapi32.LookupAccountNameW
|
||||
//sys convertSidToStringSid(sid *byte, str **uint16) (err error) = advapi32.ConvertSidToStringSidW
|
||||
//sys convertStringSecurityDescriptorToSecurityDescriptor(str string, revision uint32, sd *uintptr, size *uint32) (err error) = advapi32.ConvertStringSecurityDescriptorToSecurityDescriptorW
|
||||
//sys convertSecurityDescriptorToStringSecurityDescriptor(sd *byte, revision uint32, secInfo uint32, sddl **uint16, sddlSize *uint32) (err error) = advapi32.ConvertSecurityDescriptorToStringSecurityDescriptorW
|
||||
//sys localFree(mem uintptr) = LocalFree
|
||||
//sys getSecurityDescriptorLength(sd uintptr) (len uint32) = advapi32.GetSecurityDescriptorLength
|
||||
|
||||
const (
|
||||
cERROR_NONE_MAPPED = syscall.Errno(1332)
|
||||
)
|
||||
|
||||
type AccountLookupError struct {
|
||||
Name string
|
||||
Err error
|
||||
}
|
||||
|
||||
func (e *AccountLookupError) Error() string {
|
||||
if e.Name == "" {
|
||||
return "lookup account: empty account name specified"
|
||||
}
|
||||
var s string
|
||||
switch e.Err {
|
||||
case cERROR_NONE_MAPPED:
|
||||
s = "not found"
|
||||
default:
|
||||
s = e.Err.Error()
|
||||
}
|
||||
return "lookup account " + e.Name + ": " + s
|
||||
}
|
||||
|
||||
type SddlConversionError struct {
|
||||
Sddl string
|
||||
Err error
|
||||
}
|
||||
|
||||
func (e *SddlConversionError) Error() string {
|
||||
return "convert " + e.Sddl + ": " + e.Err.Error()
|
||||
}
|
||||
|
||||
// LookupSidByName looks up the SID of an account by name
|
||||
func LookupSidByName(name string) (sid string, err error) {
|
||||
if name == "" {
|
||||
return "", &AccountLookupError{name, cERROR_NONE_MAPPED}
|
||||
}
|
||||
|
||||
var sidSize, sidNameUse, refDomainSize uint32
|
||||
err = lookupAccountName(nil, name, nil, &sidSize, nil, &refDomainSize, &sidNameUse)
|
||||
if err != nil && err != syscall.ERROR_INSUFFICIENT_BUFFER {
|
||||
return "", &AccountLookupError{name, err}
|
||||
}
|
||||
sidBuffer := make([]byte, sidSize)
|
||||
refDomainBuffer := make([]uint16, refDomainSize)
|
||||
err = lookupAccountName(nil, name, &sidBuffer[0], &sidSize, &refDomainBuffer[0], &refDomainSize, &sidNameUse)
|
||||
if err != nil {
|
||||
return "", &AccountLookupError{name, err}
|
||||
}
|
||||
var strBuffer *uint16
|
||||
err = convertSidToStringSid(&sidBuffer[0], &strBuffer)
|
||||
if err != nil {
|
||||
return "", &AccountLookupError{name, err}
|
||||
}
|
||||
sid = syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(strBuffer))[:])
|
||||
localFree(uintptr(unsafe.Pointer(strBuffer)))
|
||||
return sid, nil
|
||||
}
|
||||
|
||||
func SddlToSecurityDescriptor(sddl string) ([]byte, error) {
|
||||
var sdBuffer uintptr
|
||||
err := convertStringSecurityDescriptorToSecurityDescriptor(sddl, 1, &sdBuffer, nil)
|
||||
if err != nil {
|
||||
return nil, &SddlConversionError{sddl, err}
|
||||
}
|
||||
defer localFree(sdBuffer)
|
||||
sd := make([]byte, getSecurityDescriptorLength(sdBuffer))
|
||||
copy(sd, (*[0xffff]byte)(unsafe.Pointer(sdBuffer))[:len(sd)])
|
||||
return sd, nil
|
||||
}
|
||||
|
||||
func SecurityDescriptorToSddl(sd []byte) (string, error) {
|
||||
var sddl *uint16
|
||||
// The returned string length seems to including an aribtrary number of terminating NULs.
|
||||
// Don't use it.
|
||||
err := convertSecurityDescriptorToStringSecurityDescriptor(&sd[0], 1, 0xff, &sddl, nil)
|
||||
if err != nil {
|
||||
return "", err
|
||||
}
|
||||
defer localFree(uintptr(unsafe.Pointer(sddl)))
|
||||
return syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(sddl))[:]), nil
|
||||
}
|
||||
|
|
@ -0,0 +1,3 @@
|
|||
package winio
|
||||
|
||||
//go:generate go run $GOROOT/src/syscall/mksyscall_windows.go -output zsyscall.go file.go pipe.go sd.go fileinfo.go privilege.go backup.go
|
||||
|
|
@ -0,0 +1,492 @@
|
|||
// MACHINE GENERATED BY 'go generate' COMMAND; DO NOT EDIT
|
||||
|
||||
package winio
|
||||
|
||||
import "unsafe"
|
||||
import "syscall"
|
||||
|
||||
var _ unsafe.Pointer
|
||||
|
||||
var (
|
||||
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
|
||||
modwinmm = syscall.NewLazyDLL("winmm.dll")
|
||||
modadvapi32 = syscall.NewLazyDLL("advapi32.dll")
|
||||
|
||||
procCancelIoEx = modkernel32.NewProc("CancelIoEx")
|
||||
procCreateIoCompletionPort = modkernel32.NewProc("CreateIoCompletionPort")
|
||||
procGetQueuedCompletionStatus = modkernel32.NewProc("GetQueuedCompletionStatus")
|
||||
procSetFileCompletionNotificationModes = modkernel32.NewProc("SetFileCompletionNotificationModes")
|
||||
proctimeBeginPeriod = modwinmm.NewProc("timeBeginPeriod")
|
||||
procConnectNamedPipe = modkernel32.NewProc("ConnectNamedPipe")
|
||||
procCreateNamedPipeW = modkernel32.NewProc("CreateNamedPipeW")
|
||||
procCreateFileW = modkernel32.NewProc("CreateFileW")
|
||||
procWaitNamedPipeW = modkernel32.NewProc("WaitNamedPipeW")
|
||||
procGetNamedPipeInfo = modkernel32.NewProc("GetNamedPipeInfo")
|
||||
procGetNamedPipeHandleStateW = modkernel32.NewProc("GetNamedPipeHandleStateW")
|
||||
procLookupAccountNameW = modadvapi32.NewProc("LookupAccountNameW")
|
||||
procConvertSidToStringSidW = modadvapi32.NewProc("ConvertSidToStringSidW")
|
||||
procConvertStringSecurityDescriptorToSecurityDescriptorW = modadvapi32.NewProc("ConvertStringSecurityDescriptorToSecurityDescriptorW")
|
||||
procConvertSecurityDescriptorToStringSecurityDescriptorW = modadvapi32.NewProc("ConvertSecurityDescriptorToStringSecurityDescriptorW")
|
||||
procLocalFree = modkernel32.NewProc("LocalFree")
|
||||
procGetSecurityDescriptorLength = modadvapi32.NewProc("GetSecurityDescriptorLength")
|
||||
procGetFileInformationByHandleEx = modkernel32.NewProc("GetFileInformationByHandleEx")
|
||||
procSetFileInformationByHandle = modkernel32.NewProc("SetFileInformationByHandle")
|
||||
procAdjustTokenPrivileges = modadvapi32.NewProc("AdjustTokenPrivileges")
|
||||
procImpersonateSelf = modadvapi32.NewProc("ImpersonateSelf")
|
||||
procRevertToSelf = modadvapi32.NewProc("RevertToSelf")
|
||||
procOpenThreadToken = modadvapi32.NewProc("OpenThreadToken")
|
||||
procGetCurrentThread = modkernel32.NewProc("GetCurrentThread")
|
||||
procLookupPrivilegeValueW = modadvapi32.NewProc("LookupPrivilegeValueW")
|
||||
procLookupPrivilegeNameW = modadvapi32.NewProc("LookupPrivilegeNameW")
|
||||
procLookupPrivilegeDisplayNameW = modadvapi32.NewProc("LookupPrivilegeDisplayNameW")
|
||||
procBackupRead = modkernel32.NewProc("BackupRead")
|
||||
procBackupWrite = modkernel32.NewProc("BackupWrite")
|
||||
)
|
||||
|
||||
func cancelIoEx(file syscall.Handle, o *syscall.Overlapped) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procCancelIoEx.Addr(), 2, uintptr(file), uintptr(unsafe.Pointer(o)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func createIoCompletionPort(file syscall.Handle, port syscall.Handle, key uintptr, threadCount uint32) (newport syscall.Handle, err error) {
|
||||
r0, _, e1 := syscall.Syscall6(procCreateIoCompletionPort.Addr(), 4, uintptr(file), uintptr(port), uintptr(key), uintptr(threadCount), 0, 0)
|
||||
newport = syscall.Handle(r0)
|
||||
if newport == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getQueuedCompletionStatus(port syscall.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procGetQueuedCompletionStatus.Addr(), 5, uintptr(port), uintptr(unsafe.Pointer(bytes)), uintptr(unsafe.Pointer(key)), uintptr(unsafe.Pointer(o)), uintptr(timeout), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func setFileCompletionNotificationModes(h syscall.Handle, flags uint8) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procSetFileCompletionNotificationModes.Addr(), 2, uintptr(h), uintptr(flags), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func timeBeginPeriod(period uint32) (n int32) {
|
||||
r0, _, _ := syscall.Syscall(proctimeBeginPeriod.Addr(), 1, uintptr(period), 0, 0)
|
||||
n = int32(r0)
|
||||
return
|
||||
}
|
||||
|
||||
func connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procConnectNamedPipe.Addr(), 2, uintptr(pipe), uintptr(unsafe.Pointer(o)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *securityAttributes) (handle syscall.Handle, err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(name)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _createNamedPipe(_p0, flags, pipeMode, maxInstances, outSize, inSize, defaultTimeout, sa)
|
||||
}
|
||||
|
||||
func _createNamedPipe(name *uint16, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *securityAttributes) (handle syscall.Handle, err error) {
|
||||
r0, _, e1 := syscall.Syscall9(procCreateNamedPipeW.Addr(), 8, uintptr(unsafe.Pointer(name)), uintptr(flags), uintptr(pipeMode), uintptr(maxInstances), uintptr(outSize), uintptr(inSize), uintptr(defaultTimeout), uintptr(unsafe.Pointer(sa)), 0)
|
||||
handle = syscall.Handle(r0)
|
||||
if handle == syscall.InvalidHandle {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func createFile(name string, access uint32, mode uint32, sa *securityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(name)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _createFile(_p0, access, mode, sa, createmode, attrs, templatefile)
|
||||
}
|
||||
|
||||
func _createFile(name *uint16, access uint32, mode uint32, sa *securityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) {
|
||||
r0, _, e1 := syscall.Syscall9(procCreateFileW.Addr(), 7, uintptr(unsafe.Pointer(name)), uintptr(access), uintptr(mode), uintptr(unsafe.Pointer(sa)), uintptr(createmode), uintptr(attrs), uintptr(templatefile), 0, 0)
|
||||
handle = syscall.Handle(r0)
|
||||
if handle == syscall.InvalidHandle {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func waitNamedPipe(name string, timeout uint32) (err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(name)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _waitNamedPipe(_p0, timeout)
|
||||
}
|
||||
|
||||
func _waitNamedPipe(name *uint16, timeout uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procWaitNamedPipeW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(timeout), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procGetNamedPipeInfo.Addr(), 5, uintptr(pipe), uintptr(unsafe.Pointer(flags)), uintptr(unsafe.Pointer(outSize)), uintptr(unsafe.Pointer(inSize)), uintptr(unsafe.Pointer(maxInstances)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall9(procGetNamedPipeHandleStateW.Addr(), 7, uintptr(pipe), uintptr(unsafe.Pointer(state)), uintptr(unsafe.Pointer(curInstances)), uintptr(unsafe.Pointer(maxCollectionCount)), uintptr(unsafe.Pointer(collectDataTimeout)), uintptr(unsafe.Pointer(userName)), uintptr(maxUserNameSize), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func lookupAccountName(systemName *uint16, accountName string, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(accountName)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _lookupAccountName(systemName, _p0, sid, sidSize, refDomain, refDomainSize, sidNameUse)
|
||||
}
|
||||
|
||||
func _lookupAccountName(systemName *uint16, accountName *uint16, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall9(procLookupAccountNameW.Addr(), 7, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(accountName)), uintptr(unsafe.Pointer(sid)), uintptr(unsafe.Pointer(sidSize)), uintptr(unsafe.Pointer(refDomain)), uintptr(unsafe.Pointer(refDomainSize)), uintptr(unsafe.Pointer(sidNameUse)), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func convertSidToStringSid(sid *byte, str **uint16) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procConvertSidToStringSidW.Addr(), 2, uintptr(unsafe.Pointer(sid)), uintptr(unsafe.Pointer(str)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func convertStringSecurityDescriptorToSecurityDescriptor(str string, revision uint32, sd *uintptr, size *uint32) (err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(str)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _convertStringSecurityDescriptorToSecurityDescriptor(_p0, revision, sd, size)
|
||||
}
|
||||
|
||||
func _convertStringSecurityDescriptorToSecurityDescriptor(str *uint16, revision uint32, sd *uintptr, size *uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procConvertStringSecurityDescriptorToSecurityDescriptorW.Addr(), 4, uintptr(unsafe.Pointer(str)), uintptr(revision), uintptr(unsafe.Pointer(sd)), uintptr(unsafe.Pointer(size)), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func convertSecurityDescriptorToStringSecurityDescriptor(sd *byte, revision uint32, secInfo uint32, sddl **uint16, sddlSize *uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procConvertSecurityDescriptorToStringSecurityDescriptorW.Addr(), 5, uintptr(unsafe.Pointer(sd)), uintptr(revision), uintptr(secInfo), uintptr(unsafe.Pointer(sddl)), uintptr(unsafe.Pointer(sddlSize)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func localFree(mem uintptr) {
|
||||
syscall.Syscall(procLocalFree.Addr(), 1, uintptr(mem), 0, 0)
|
||||
return
|
||||
}
|
||||
|
||||
func getSecurityDescriptorLength(sd uintptr) (len uint32) {
|
||||
r0, _, _ := syscall.Syscall(procGetSecurityDescriptorLength.Addr(), 1, uintptr(sd), 0, 0)
|
||||
len = uint32(r0)
|
||||
return
|
||||
}
|
||||
|
||||
func getFileInformationByHandleEx(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procGetFileInformationByHandleEx.Addr(), 4, uintptr(h), uintptr(class), uintptr(unsafe.Pointer(buffer)), uintptr(size), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func setFileInformationByHandle(h syscall.Handle, class uint32, buffer *byte, size uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procSetFileInformationByHandle.Addr(), 4, uintptr(h), uintptr(class), uintptr(unsafe.Pointer(buffer)), uintptr(size), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func adjustTokenPrivileges(token syscall.Handle, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) {
|
||||
var _p0 uint32
|
||||
if releaseAll {
|
||||
_p0 = 1
|
||||
} else {
|
||||
_p0 = 0
|
||||
}
|
||||
r0, _, e1 := syscall.Syscall6(procAdjustTokenPrivileges.Addr(), 6, uintptr(token), uintptr(_p0), uintptr(unsafe.Pointer(input)), uintptr(outputSize), uintptr(unsafe.Pointer(output)), uintptr(unsafe.Pointer(requiredSize)))
|
||||
success = r0 != 0
|
||||
if true {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func impersonateSelf(level uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procImpersonateSelf.Addr(), 1, uintptr(level), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func revertToSelf() (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procRevertToSelf.Addr(), 0, 0, 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func openThreadToken(thread syscall.Handle, accessMask uint32, openAsSelf bool, token *syscall.Handle) (err error) {
|
||||
var _p0 uint32
|
||||
if openAsSelf {
|
||||
_p0 = 1
|
||||
} else {
|
||||
_p0 = 0
|
||||
}
|
||||
r1, _, e1 := syscall.Syscall6(procOpenThreadToken.Addr(), 4, uintptr(thread), uintptr(accessMask), uintptr(_p0), uintptr(unsafe.Pointer(token)), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getCurrentThread() (h syscall.Handle) {
|
||||
r0, _, _ := syscall.Syscall(procGetCurrentThread.Addr(), 0, 0, 0, 0)
|
||||
h = syscall.Handle(r0)
|
||||
return
|
||||
}
|
||||
|
||||
func lookupPrivilegeValue(systemName string, name string, luid *uint64) (err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(systemName)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
var _p1 *uint16
|
||||
_p1, err = syscall.UTF16PtrFromString(name)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _lookupPrivilegeValue(_p0, _p1, luid)
|
||||
}
|
||||
|
||||
func _lookupPrivilegeValue(systemName *uint16, name *uint16, luid *uint64) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procLookupPrivilegeValueW.Addr(), 3, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(luid)))
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func lookupPrivilegeName(systemName string, luid *uint64, buffer *uint16, size *uint32) (err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(systemName)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _lookupPrivilegeName(_p0, luid, buffer, size)
|
||||
}
|
||||
|
||||
func _lookupPrivilegeName(systemName *uint16, luid *uint64, buffer *uint16, size *uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procLookupPrivilegeNameW.Addr(), 4, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(luid)), uintptr(unsafe.Pointer(buffer)), uintptr(unsafe.Pointer(size)), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func lookupPrivilegeDisplayName(systemName string, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) {
|
||||
var _p0 *uint16
|
||||
_p0, err = syscall.UTF16PtrFromString(systemName)
|
||||
if err != nil {
|
||||
return
|
||||
}
|
||||
return _lookupPrivilegeDisplayName(_p0, name, buffer, size, languageId)
|
||||
}
|
||||
|
||||
func _lookupPrivilegeDisplayName(systemName *uint16, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall6(procLookupPrivilegeDisplayNameW.Addr(), 5, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(buffer)), uintptr(unsafe.Pointer(size)), uintptr(unsafe.Pointer(languageId)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) {
|
||||
var _p0 *byte
|
||||
if len(b) > 0 {
|
||||
_p0 = &b[0]
|
||||
}
|
||||
var _p1 uint32
|
||||
if abort {
|
||||
_p1 = 1
|
||||
} else {
|
||||
_p1 = 0
|
||||
}
|
||||
var _p2 uint32
|
||||
if processSecurity {
|
||||
_p2 = 1
|
||||
} else {
|
||||
_p2 = 0
|
||||
}
|
||||
r1, _, e1 := syscall.Syscall9(procBackupRead.Addr(), 7, uintptr(h), uintptr(unsafe.Pointer(_p0)), uintptr(len(b)), uintptr(unsafe.Pointer(bytesRead)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(context)), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) {
|
||||
var _p0 *byte
|
||||
if len(b) > 0 {
|
||||
_p0 = &b[0]
|
||||
}
|
||||
var _p1 uint32
|
||||
if abort {
|
||||
_p1 = 1
|
||||
} else {
|
||||
_p1 = 0
|
||||
}
|
||||
var _p2 uint32
|
||||
if processSecurity {
|
||||
_p2 = 1
|
||||
} else {
|
||||
_p2 = 0
|
||||
}
|
||||
r1, _, e1 := syscall.Syscall9(procBackupWrite.Addr(), 7, uintptr(h), uintptr(unsafe.Pointer(_p0)), uintptr(len(b)), uintptr(unsafe.Pointer(bytesWritten)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(context)), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
|
@ -19,637 +19,19 @@
|
|||
package rpc
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
"net"
|
||||
"sync"
|
||||
"syscall"
|
||||
"time"
|
||||
"unsafe"
|
||||
|
||||
"github.com/microsoft/go-winio"
|
||||
)
|
||||
|
||||
var (
|
||||
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
|
||||
|
||||
procCreateNamedPipeW = modkernel32.NewProc("CreateNamedPipeW")
|
||||
procConnectNamedPipe = modkernel32.NewProc("ConnectNamedPipe")
|
||||
procDisconnectNamedPipe = modkernel32.NewProc("DisconnectNamedPipe")
|
||||
procWaitNamedPipeW = modkernel32.NewProc("WaitNamedPipeW")
|
||||
procCreateEventW = modkernel32.NewProc("CreateEventW")
|
||||
procGetOverlappedResult = modkernel32.NewProc("GetOverlappedResult")
|
||||
procCancelIoEx = modkernel32.NewProc("CancelIoEx")
|
||||
)
|
||||
|
||||
func createNamedPipe(name *uint16, openMode uint32, pipeMode uint32, maxInstances uint32, outBufSize uint32, inBufSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) {
|
||||
r0, _, e1 := syscall.Syscall9(procCreateNamedPipeW.Addr(), 8, uintptr(unsafe.Pointer(name)), uintptr(openMode), uintptr(pipeMode), uintptr(maxInstances), uintptr(outBufSize), uintptr(inBufSize), uintptr(defaultTimeout), uintptr(unsafe.Pointer(sa)), 0)
|
||||
handle = syscall.Handle(r0)
|
||||
if handle == syscall.InvalidHandle {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func cancelIoEx(handle syscall.Handle, overlapped *syscall.Overlapped) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procCancelIoEx.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(overlapped)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func connectNamedPipe(handle syscall.Handle, overlapped *syscall.Overlapped) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procConnectNamedPipe.Addr(), 2, uintptr(handle), uintptr(unsafe.Pointer(overlapped)), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func disconnectNamedPipe(handle syscall.Handle) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procDisconnectNamedPipe.Addr(), 1, uintptr(handle), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func waitNamedPipe(name *uint16, timeout uint32) (err error) {
|
||||
r1, _, e1 := syscall.Syscall(procWaitNamedPipeW.Addr(), 2, uintptr(unsafe.Pointer(name)), uintptr(timeout), 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func createEvent(sa *syscall.SecurityAttributes, manualReset bool, initialState bool, name *uint16) (handle syscall.Handle, err error) {
|
||||
var _p0 uint32
|
||||
if manualReset {
|
||||
_p0 = 1
|
||||
} else {
|
||||
_p0 = 0
|
||||
}
|
||||
var _p1 uint32
|
||||
if initialState {
|
||||
_p1 = 1
|
||||
} else {
|
||||
_p1 = 0
|
||||
}
|
||||
r0, _, e1 := syscall.Syscall6(procCreateEventW.Addr(), 4, uintptr(unsafe.Pointer(sa)), uintptr(_p0), uintptr(_p1), uintptr(unsafe.Pointer(name)), 0, 0)
|
||||
handle = syscall.Handle(r0)
|
||||
if handle == syscall.InvalidHandle {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
func getOverlappedResult(handle syscall.Handle, overlapped *syscall.Overlapped, transferred *uint32, wait bool) (err error) {
|
||||
var _p0 uint32
|
||||
if wait {
|
||||
_p0 = 1
|
||||
} else {
|
||||
_p0 = 0
|
||||
}
|
||||
r1, _, e1 := syscall.Syscall6(procGetOverlappedResult.Addr(), 4, uintptr(handle), uintptr(unsafe.Pointer(overlapped)), uintptr(unsafe.Pointer(transferred)), uintptr(_p0), 0, 0)
|
||||
if r1 == 0 {
|
||||
if e1 != 0 {
|
||||
err = error(e1)
|
||||
} else {
|
||||
err = syscall.EINVAL
|
||||
}
|
||||
}
|
||||
return
|
||||
}
|
||||
|
||||
const (
|
||||
// openMode
|
||||
pipe_access_duplex = 0x3
|
||||
pipe_access_inbound = 0x1
|
||||
pipe_access_outbound = 0x2
|
||||
|
||||
// openMode write flags
|
||||
file_flag_first_pipe_instance = 0x00080000
|
||||
file_flag_write_through = 0x80000000
|
||||
file_flag_overlapped = 0x40000000
|
||||
|
||||
// openMode ACL flags
|
||||
write_dac = 0x00040000
|
||||
write_owner = 0x00080000
|
||||
access_system_security = 0x01000000
|
||||
|
||||
// pipeMode
|
||||
pipe_type_byte = 0x0
|
||||
pipe_type_message = 0x4
|
||||
|
||||
// pipeMode read mode flags
|
||||
pipe_readmode_byte = 0x0
|
||||
pipe_readmode_message = 0x2
|
||||
|
||||
// pipeMode wait mode flags
|
||||
pipe_wait = 0x0
|
||||
pipe_nowait = 0x1
|
||||
|
||||
// pipeMode remote-client mode flags
|
||||
pipe_accept_remote_clients = 0x0
|
||||
pipe_reject_remote_clients = 0x8
|
||||
|
||||
pipe_unlimited_instances = 255
|
||||
|
||||
nmpwait_wait_forever = 0xFFFFFFFF
|
||||
|
||||
// the two not-an-errors below occur if a client connects to the pipe between
|
||||
// the server's CreateNamedPipe and ConnectNamedPipe calls.
|
||||
error_no_data syscall.Errno = 0xE8
|
||||
error_pipe_connected syscall.Errno = 0x217
|
||||
error_pipe_busy syscall.Errno = 0xE7
|
||||
error_sem_timeout syscall.Errno = 0x79
|
||||
|
||||
error_bad_pathname syscall.Errno = 0xA1
|
||||
error_invalid_name syscall.Errno = 0x7B
|
||||
|
||||
error_io_incomplete syscall.Errno = 0x3e4
|
||||
)
|
||||
|
||||
var _ net.Conn = (*PipeConn)(nil)
|
||||
var _ net.Listener = (*PipeListener)(nil)
|
||||
|
||||
// ErrClosed is the error returned by PipeListener.Accept when Close is called
|
||||
// on the PipeListener.
|
||||
var ErrClosed = PipeError{"Pipe has been closed.", false}
|
||||
|
||||
// PipeError is an error related to a call to a pipe
|
||||
type PipeError struct {
|
||||
msg string
|
||||
timeout bool
|
||||
}
|
||||
|
||||
// Error implements the error interface
|
||||
func (e PipeError) Error() string {
|
||||
return e.msg
|
||||
}
|
||||
|
||||
// Timeout implements net.AddrError.Timeout()
|
||||
func (e PipeError) Timeout() bool {
|
||||
return e.timeout
|
||||
}
|
||||
|
||||
// Temporary implements net.AddrError.Temporary()
|
||||
func (e PipeError) Temporary() bool {
|
||||
return false
|
||||
}
|
||||
|
||||
// Dial connects to a named pipe with the given address. If the specified pipe is not available,
|
||||
// it will wait indefinitely for the pipe to become available.
|
||||
//
|
||||
// The address must be of the form \\.\\pipe\<name> for local pipes and \\<computer>\pipe\<name>
|
||||
// for remote pipes.
|
||||
//
|
||||
// Dial will return a PipeError if you pass in a badly formatted pipe name.
|
||||
//
|
||||
// Examples:
|
||||
// // local pipe
|
||||
// conn, err := Dial(`\\.\pipe\mypipename`)
|
||||
//
|
||||
// // remote pipe
|
||||
// conn, err := Dial(`\\othercomp\pipe\mypipename`)
|
||||
func Dial(address string) (*PipeConn, error) {
|
||||
for {
|
||||
conn, err := dial(address, nmpwait_wait_forever)
|
||||
if err == nil {
|
||||
return conn, nil
|
||||
}
|
||||
if isPipeNotReady(err) {
|
||||
<-time.After(100 * time.Millisecond)
|
||||
continue
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
// DialTimeout acts like Dial, but will time out after the duration of timeout
|
||||
func DialTimeout(address string, timeout time.Duration) (*PipeConn, error) {
|
||||
deadline := time.Now().Add(timeout)
|
||||
|
||||
now := time.Now()
|
||||
for now.Before(deadline) {
|
||||
millis := uint32(deadline.Sub(now) / time.Millisecond)
|
||||
conn, err := dial(address, millis)
|
||||
if err == nil {
|
||||
return conn, nil
|
||||
}
|
||||
if err == error_sem_timeout {
|
||||
// This is WaitNamedPipe's timeout error, so we know we're done
|
||||
return nil, PipeError{fmt.Sprintf(
|
||||
"Timed out waiting for pipe '%s' to come available", address), true}
|
||||
}
|
||||
if isPipeNotReady(err) {
|
||||
left := deadline.Sub(time.Now())
|
||||
retry := 100 * time.Millisecond
|
||||
if left > retry {
|
||||
<-time.After(retry)
|
||||
} else {
|
||||
<-time.After(left - time.Millisecond)
|
||||
}
|
||||
now = time.Now()
|
||||
continue
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
return nil, PipeError{fmt.Sprintf(
|
||||
"Timed out waiting for pipe '%s' to come available", address), true}
|
||||
}
|
||||
|
||||
// isPipeNotReady checks the error to see if it indicates the pipe is not ready
|
||||
func isPipeNotReady(err error) bool {
|
||||
// Pipe Busy means another client just grabbed the open pipe end,
|
||||
// and the server hasn't made a new one yet.
|
||||
// File Not Found means the server hasn't created the pipe yet.
|
||||
// Neither is a fatal error.
|
||||
|
||||
return err == syscall.ERROR_FILE_NOT_FOUND || err == error_pipe_busy
|
||||
}
|
||||
|
||||
// newOverlapped creates a structure used to track asynchronous
|
||||
// I/O requests that have been issued.
|
||||
func newOverlapped() (*syscall.Overlapped, error) {
|
||||
event, err := createEvent(nil, true, true, nil)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &syscall.Overlapped{HEvent: event}, nil
|
||||
}
|
||||
|
||||
// waitForCompletion waits for an asynchronous I/O request referred to by overlapped to complete.
|
||||
// This function returns the number of bytes transferred by the operation and an error code if
|
||||
// applicable (nil otherwise).
|
||||
func waitForCompletion(handle syscall.Handle, overlapped *syscall.Overlapped) (uint32, error) {
|
||||
_, err := syscall.WaitForSingleObject(overlapped.HEvent, syscall.INFINITE)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
var transferred uint32
|
||||
err = getOverlappedResult(handle, overlapped, &transferred, true)
|
||||
return transferred, err
|
||||
}
|
||||
|
||||
// dial is a helper to initiate a connection to a named pipe that has been started by a server.
|
||||
// The timeout is only enforced if the pipe server has already created the pipe, otherwise
|
||||
// this function will return immediately.
|
||||
func dial(address string, timeout uint32) (*PipeConn, error) {
|
||||
name, err := syscall.UTF16PtrFromString(string(address))
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
// If at least one instance of the pipe has been created, this function
|
||||
// will wait timeout milliseconds for it to become available.
|
||||
// It will return immediately regardless of timeout, if no instances
|
||||
// of the named pipe have been created yet.
|
||||
// If this returns with no error, there is a pipe available.
|
||||
if err := waitNamedPipe(name, timeout); err != nil {
|
||||
if err == error_bad_pathname {
|
||||
// badly formatted pipe name
|
||||
return nil, badAddr(address)
|
||||
}
|
||||
return nil, err
|
||||
}
|
||||
pathp, err := syscall.UTF16PtrFromString(address)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
handle, err := syscall.CreateFile(pathp, syscall.GENERIC_READ|syscall.GENERIC_WRITE,
|
||||
uint32(syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE), nil, syscall.OPEN_EXISTING,
|
||||
syscall.FILE_FLAG_OVERLAPPED, 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &PipeConn{handle: handle, addr: PipeAddr(address)}, nil
|
||||
}
|
||||
|
||||
// Listen returns a new PipeListener that will listen on a pipe with the given
|
||||
// address. The address must be of the form \\.\pipe\<name>
|
||||
//
|
||||
// Listen will return a PipeError for an incorrectly formatted pipe name.
|
||||
func Listen(address string) (*PipeListener, error) {
|
||||
handle, err := createPipe(address, true)
|
||||
if err == error_invalid_name {
|
||||
return nil, badAddr(address)
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return &PipeListener{
|
||||
addr: PipeAddr(address),
|
||||
handle: handle,
|
||||
}, nil
|
||||
}
|
||||
|
||||
// PipeListener is a named pipe listener. Clients should typically
|
||||
// use variables of type net.Listener instead of assuming named pipe.
|
||||
type PipeListener struct {
|
||||
addr PipeAddr
|
||||
handle syscall.Handle
|
||||
closed bool
|
||||
|
||||
// acceptHandle contains the current handle waiting for
|
||||
// an incoming connection or nil.
|
||||
acceptHandle syscall.Handle
|
||||
// acceptOverlapped is set before waiting on a connection.
|
||||
// If not waiting, it is nil.
|
||||
acceptOverlapped *syscall.Overlapped
|
||||
// acceptMutex protects the handle and overlapped structure.
|
||||
acceptMutex sync.Mutex
|
||||
}
|
||||
|
||||
// Accept implements the Accept method in the net.Listener interface; it
|
||||
// waits for the next call and returns a generic net.Conn.
|
||||
func (l *PipeListener) Accept() (net.Conn, error) {
|
||||
c, err := l.AcceptPipe()
|
||||
for err == error_no_data {
|
||||
// Ignore clients that connect and immediately disconnect.
|
||||
c, err = l.AcceptPipe()
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return c, nil
|
||||
}
|
||||
|
||||
// AcceptPipe accepts the next incoming call and returns the new connection.
|
||||
// It might return an error if a client connected and immediately cancelled
|
||||
// the connection.
|
||||
func (l *PipeListener) AcceptPipe() (*PipeConn, error) {
|
||||
if l == nil || l.addr == "" || l.closed {
|
||||
return nil, syscall.EINVAL
|
||||
}
|
||||
|
||||
// the first time we call accept, the handle will have been created by the Listen
|
||||
// call. This is to prevent race conditions where the client thinks the server
|
||||
// isn't listening because it hasn't actually called create yet. After the first time, we'll
|
||||
// have to create a new handle each time
|
||||
handle := l.handle
|
||||
if handle == 0 {
|
||||
var err error
|
||||
handle, err = createPipe(string(l.addr), false)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
} else {
|
||||
l.handle = 0
|
||||
}
|
||||
|
||||
overlapped, err := newOverlapped()
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
defer syscall.CloseHandle(overlapped.HEvent)
|
||||
if err := connectNamedPipe(handle, overlapped); err != nil && err != error_pipe_connected {
|
||||
if err == error_io_incomplete || err == syscall.ERROR_IO_PENDING {
|
||||
l.acceptMutex.Lock()
|
||||
l.acceptOverlapped = overlapped
|
||||
l.acceptHandle = handle
|
||||
l.acceptMutex.Unlock()
|
||||
defer func() {
|
||||
l.acceptMutex.Lock()
|
||||
l.acceptOverlapped = nil
|
||||
l.acceptHandle = 0
|
||||
l.acceptMutex.Unlock()
|
||||
}()
|
||||
|
||||
_, err = waitForCompletion(handle, overlapped)
|
||||
}
|
||||
if err == syscall.ERROR_OPERATION_ABORTED {
|
||||
// Return error compatible to net.Listener.Accept() in case the
|
||||
// listener was closed.
|
||||
return nil, ErrClosed
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
return &PipeConn{handle: handle, addr: l.addr}, nil
|
||||
}
|
||||
|
||||
// Close stops listening on the address.
|
||||
// Already Accepted connections are not closed.
|
||||
func (l *PipeListener) Close() error {
|
||||
if l.closed {
|
||||
return nil
|
||||
}
|
||||
l.closed = true
|
||||
if l.handle != 0 {
|
||||
err := disconnectNamedPipe(l.handle)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
err = syscall.CloseHandle(l.handle)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
l.handle = 0
|
||||
}
|
||||
l.acceptMutex.Lock()
|
||||
defer l.acceptMutex.Unlock()
|
||||
if l.acceptOverlapped != nil && l.acceptHandle != 0 {
|
||||
// Cancel the pending IO. This call does not block, so it is safe
|
||||
// to hold onto the mutex above.
|
||||
if err := cancelIoEx(l.acceptHandle, l.acceptOverlapped); err != nil {
|
||||
return err
|
||||
}
|
||||
err := syscall.CloseHandle(l.acceptOverlapped.HEvent)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
l.acceptOverlapped.HEvent = 0
|
||||
err = syscall.CloseHandle(l.acceptHandle)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
l.acceptHandle = 0
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
// Addr returns the listener's network address, a PipeAddr.
|
||||
func (l *PipeListener) Addr() net.Addr { return l.addr }
|
||||
|
||||
// PipeConn is the implementation of the net.Conn interface for named pipe connections.
|
||||
type PipeConn struct {
|
||||
handle syscall.Handle
|
||||
addr PipeAddr
|
||||
|
||||
// these aren't actually used yet
|
||||
readDeadline *time.Time
|
||||
writeDeadline *time.Time
|
||||
}
|
||||
|
||||
type iodata struct {
|
||||
n uint32
|
||||
err error
|
||||
}
|
||||
|
||||
// completeRequest looks at iodata to see if a request is pending. If so, it waits for it to either complete or to
|
||||
// abort due to hitting the specified deadline. Deadline may be set to nil to wait forever. If no request is pending,
|
||||
// the content of iodata is returned.
|
||||
func (c *PipeConn) completeRequest(data iodata, deadline *time.Time, overlapped *syscall.Overlapped) (int, error) {
|
||||
if data.err == error_io_incomplete || data.err == syscall.ERROR_IO_PENDING {
|
||||
var timer <-chan time.Time
|
||||
if deadline != nil {
|
||||
if timeDiff := deadline.Sub(time.Now()); timeDiff > 0 {
|
||||
timer = time.After(timeDiff)
|
||||
}
|
||||
}
|
||||
done := make(chan iodata)
|
||||
go func() {
|
||||
n, err := waitForCompletion(c.handle, overlapped)
|
||||
done <- iodata{n, err}
|
||||
}()
|
||||
select {
|
||||
case data = <-done:
|
||||
case <-timer:
|
||||
syscall.CancelIoEx(c.handle, overlapped)
|
||||
data = iodata{0, timeout(c.addr.String())}
|
||||
}
|
||||
}
|
||||
// Windows will produce ERROR_BROKEN_PIPE upon closing
|
||||
// a handle on the other end of a connection. Go RPC
|
||||
// expects an io.EOF error in this case.
|
||||
if data.err == syscall.ERROR_BROKEN_PIPE {
|
||||
data.err = io.EOF
|
||||
}
|
||||
return int(data.n), data.err
|
||||
}
|
||||
|
||||
// Read implements the net.Conn Read method.
|
||||
func (c *PipeConn) Read(b []byte) (int, error) {
|
||||
// Use ReadFile() rather than Read() because the latter
|
||||
// contains a workaround that eats ERROR_BROKEN_PIPE.
|
||||
overlapped, err := newOverlapped()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
defer syscall.CloseHandle(overlapped.HEvent)
|
||||
var n uint32
|
||||
err = syscall.ReadFile(c.handle, b, &n, overlapped)
|
||||
return c.completeRequest(iodata{n, err}, c.readDeadline, overlapped)
|
||||
}
|
||||
|
||||
// Write implements the net.Conn Write method.
|
||||
func (c *PipeConn) Write(b []byte) (int, error) {
|
||||
overlapped, err := newOverlapped()
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
defer syscall.CloseHandle(overlapped.HEvent)
|
||||
var n uint32
|
||||
err = syscall.WriteFile(c.handle, b, &n, overlapped)
|
||||
return c.completeRequest(iodata{n, err}, c.writeDeadline, overlapped)
|
||||
}
|
||||
|
||||
// Close closes the connection.
|
||||
func (c *PipeConn) Close() error {
|
||||
return syscall.CloseHandle(c.handle)
|
||||
}
|
||||
|
||||
// LocalAddr returns the local network address.
|
||||
func (c *PipeConn) LocalAddr() net.Addr {
|
||||
return c.addr
|
||||
}
|
||||
|
||||
// RemoteAddr returns the remote network address.
|
||||
func (c *PipeConn) RemoteAddr() net.Addr {
|
||||
// not sure what to do here, we don't have remote addr....
|
||||
return c.addr
|
||||
}
|
||||
|
||||
// SetDeadline implements the net.Conn SetDeadline method.
|
||||
// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
||||
func (c *PipeConn) SetDeadline(t time.Time) error {
|
||||
c.SetReadDeadline(t)
|
||||
c.SetWriteDeadline(t)
|
||||
return nil
|
||||
}
|
||||
|
||||
// SetReadDeadline implements the net.Conn SetReadDeadline method.
|
||||
// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
||||
func (c *PipeConn) SetReadDeadline(t time.Time) error {
|
||||
c.readDeadline = &t
|
||||
return nil
|
||||
}
|
||||
|
||||
// SetWriteDeadline implements the net.Conn SetWriteDeadline method.
|
||||
// Note that timeouts are only supported on Windows Vista/Server 2008 and above
|
||||
func (c *PipeConn) SetWriteDeadline(t time.Time) error {
|
||||
c.writeDeadline = &t
|
||||
return nil
|
||||
}
|
||||
|
||||
// PipeAddr represents the address of a named pipe.
|
||||
type PipeAddr string
|
||||
|
||||
// Network returns the address's network name, "pipe".
|
||||
func (a PipeAddr) Network() string { return "pipe" }
|
||||
|
||||
// String returns the address of the pipe
|
||||
func (a PipeAddr) String() string {
|
||||
return string(a)
|
||||
}
|
||||
|
||||
// createPipe is a helper function to make sure we always create pipes
|
||||
// with the same arguments, since subsequent calls to create pipe need
|
||||
// to use the same arguments as the first one. If first is set, fail
|
||||
// if the pipe already exists.
|
||||
func createPipe(address string, first bool) (syscall.Handle, error) {
|
||||
n, err := syscall.UTF16PtrFromString(address)
|
||||
if err != nil {
|
||||
return 0, err
|
||||
}
|
||||
mode := uint32(pipe_access_duplex | syscall.FILE_FLAG_OVERLAPPED)
|
||||
if first {
|
||||
mode |= file_flag_first_pipe_instance
|
||||
}
|
||||
return createNamedPipe(n,
|
||||
mode,
|
||||
pipe_type_byte,
|
||||
pipe_unlimited_instances,
|
||||
512, 512, 0, nil)
|
||||
}
|
||||
|
||||
func badAddr(addr string) PipeError {
|
||||
return PipeError{fmt.Sprintf("Invalid pipe address '%s'.", addr), false}
|
||||
}
|
||||
func timeout(addr string) PipeError {
|
||||
return PipeError{fmt.Sprintf("Pipe IO timed out waiting for '%s'", addr), true}
|
||||
}
|
||||
|
||||
// ipcListen will create a named pipe on the given endpoint.
|
||||
func ipcListen(endpoint string) (net.Listener, error) {
|
||||
return Listen(endpoint)
|
||||
return winio.ListenPipe(endpoint, &winio.PipeConfig{})
|
||||
}
|
||||
|
||||
// newIPCConnection will connect to a named pipe with the given endpoint as name.
|
||||
func newIPCConnection(endpoint string) (net.Conn, error) {
|
||||
return Dial(endpoint)
|
||||
timeout := 5 * time.Second
|
||||
return winio.DialPipe(endpoint, &timeout)
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue