1 files changed, 100 insertions, 0 deletions
diff --git a/src/net/fd_posix.go b/src/net/fd_posix.go
new file mode 100644
index 0000000..53abd15
--- /dev/null
+++ b/src/net/fd_posix.go
@@ -0,0 +1,100 @@
+// Copyright 2020 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris windows
+
+package net
+
+import (
+	"internal/poll"
+	"runtime"
+	"syscall"
+	"time"
+)
+
+// Network file descriptor.
+type netFD struct {
+	pfd poll.FD
+
+	// immutable until Close
+	family      int
+	sotype      int
+	isConnected bool // handshake completed or use of association with peer
+	net         string
+	laddr       Addr
+	raddr       Addr
+}
+
+func (fd *netFD) setAddr(laddr, raddr Addr) {
+	fd.laddr = laddr
+	fd.raddr = raddr
+	runtime.SetFinalizer(fd, (*netFD).Close)
+}
+
+func (fd *netFD) Close() error {
+	runtime.SetFinalizer(fd, nil)
+	return fd.pfd.Close()
+}
+
+func (fd *netFD) shutdown(how int) error {
+	err := fd.pfd.Shutdown(how)
+	runtime.KeepAlive(fd)
+	return wrapSyscallError("shutdown", err)
+}
+
+func (fd *netFD) closeRead() error {
+	return fd.shutdown(syscall.SHUT_RD)
+}
+
+func (fd *netFD) closeWrite() error {
+	return fd.shutdown(syscall.SHUT_WR)
+}
+
+func (fd *netFD) Read(p []byte) (n int, err error) {
+	n, err = fd.pfd.Read(p)
+	runtime.KeepAlive(fd)
+	return n, wrapSyscallError(readSyscallName, err)
+}
+
+func (fd *netFD) readFrom(p []byte) (n int, sa syscall.Sockaddr, err error) {
+	n, sa, err = fd.pfd.ReadFrom(p)
+	runtime.KeepAlive(fd)
+	return n, sa, wrapSyscallError(readFromSyscallName, err)
+}
+
+func (fd *netFD) readMsg(p []byte, oob []byte) (n, oobn, flags int, sa syscall.Sockaddr, err error) {
+	n, oobn, flags, sa, err = fd.pfd.ReadMsg(p, oob)
+	runtime.KeepAlive(fd)
+	return n, oobn, flags, sa, wrapSyscallError(readMsgSyscallName, err)
+}
+
+func (fd *netFD) Write(p []byte) (nn int, err error) {
+	nn, err = fd.pfd.Write(p)
+	runtime.KeepAlive(fd)
+	return nn, wrapSyscallError(writeSyscallName, err)
+}
+
+func (fd *netFD) writeTo(p []byte, sa syscall.Sockaddr) (n int, err error) {
+	n, err = fd.pfd.WriteTo(p, sa)
+	runtime.KeepAlive(fd)
+	return n, wrapSyscallError(writeToSyscallName, err)
+}
+
+func (fd *netFD) writeMsg(p []byte, oob []byte, sa syscall.Sockaddr) (n int, oobn int, err error) {
+	n, oobn, err = fd.pfd.WriteMsg(p, oob, sa)
+	runtime.KeepAlive(fd)
+	return n, oobn, wrapSyscallError(writeMsgSyscallName, err)
+}
+
+func (fd *netFD) SetDeadline(t time.Time) error {
+	return fd.pfd.SetDeadline(t)
+}
+
+func (fd *netFD) SetReadDeadline(t time.Time) error {
+	return fd.pfd.SetReadDeadline(t)
+}
+
+func (fd *netFD) SetWriteDeadline(t time.Time) error {
+	return fd.pfd.SetWriteDeadline(t)
+}