116 lines
2.1 KiB
Go
116 lines
2.1 KiB
Go
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package net
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import (
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"io"
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"os"
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"syscall"
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"time"
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)
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// Network file descritor.
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type netFD struct {
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proto, name, dir string
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ctl, data *os.File
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laddr, raddr Addr
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}
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var canCancelIO = true // used for testing current package
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func sysInit() {
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}
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func newFD(proto, name string, ctl *os.File, laddr, raddr Addr) *netFD {
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return &netFD{proto, name, "/net/" + proto + "/" + name, ctl, nil, laddr, raddr}
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}
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func (fd *netFD) ok() bool { return fd != nil && fd.ctl != nil }
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func (fd *netFD) Read(b []byte) (n int, err error) {
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if !fd.ok() {
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return 0, syscall.EINVAL
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}
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if fd.data == nil {
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fd.data, err = os.OpenFile(fd.dir+"/data", os.O_RDWR, 0)
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if err != nil {
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return 0, err
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}
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}
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n, err = fd.data.Read(b)
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if fd.proto == "udp" && err == io.EOF {
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n = 0
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err = nil
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}
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return
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}
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func (fd *netFD) Write(b []byte) (n int, err error) {
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if !fd.ok() {
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return 0, syscall.EINVAL
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}
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if fd.data == nil {
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fd.data, err = os.OpenFile(fd.dir+"/data", os.O_RDWR, 0)
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if err != nil {
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return 0, err
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}
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}
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return fd.data.Write(b)
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}
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func (fd *netFD) CloseRead() error {
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if !fd.ok() {
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return syscall.EINVAL
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}
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return syscall.EPLAN9
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}
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func (fd *netFD) CloseWrite() error {
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if !fd.ok() {
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return syscall.EINVAL
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}
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return syscall.EPLAN9
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}
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func (fd *netFD) Close() error {
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if !fd.ok() {
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return syscall.EINVAL
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}
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err := fd.ctl.Close()
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if err != nil {
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return err
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}
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if fd.data != nil {
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err = fd.data.Close()
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}
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fd.ctl = nil
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fd.data = nil
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return err
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}
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func (fd *netFD) dup() (*os.File, error) {
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return nil, syscall.EPLAN9
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}
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func setDeadline(fd *netFD, t time.Time) error {
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return syscall.EPLAN9
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}
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func setReadDeadline(fd *netFD, t time.Time) error {
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return syscall.EPLAN9
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}
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func setWriteDeadline(fd *netFD, t time.Time) error {
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return syscall.EPLAN9
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}
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func setReadBuffer(fd *netFD, bytes int) error {
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return syscall.EPLAN9
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}
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func setWriteBuffer(fd *netFD, bytes int) error {
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return syscall.EPLAN9
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}
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