// Copyright 2017 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. package net import ( "runtime" "syscall" ) // BUG(tmm1): On Windows, the Write method of syscall.RawConn // does not integrate with the runtime's network poller. It cannot // wait for the connection to become writeable, and does not respect // deadlines. If the user-provided callback returns false, the Write // method will fail immediately. // BUG(mikio): On JS and Plan 9, the Control, Read and Write // methods of syscall.RawConn are not implemented. type rawConn struct { fd *netFD } func (c *rawConn) ok() bool { return c != nil && c.fd != nil } func (c *rawConn) Control(f func(uintptr)) error { if !c.ok() { return syscall.EINVAL } err := c.fd.pfd.RawControl(f) runtime.KeepAlive(c.fd) if err != nil { err = &OpError{Op: "raw-control", Net: c.fd.net, Source: nil, Addr: c.fd.laddr, Err: err} } return err } func (c *rawConn) Read(f func(uintptr) bool) error { if !c.ok() { return syscall.EINVAL } err := c.fd.pfd.RawRead(f) runtime.KeepAlive(c.fd) if err != nil { err = &OpError{Op: "raw-read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err} } return err } func (c *rawConn) Write(f func(uintptr) bool) error { if !c.ok() { return syscall.EINVAL } err := c.fd.pfd.RawWrite(f) runtime.KeepAlive(c.fd) if err != nil { err = &OpError{Op: "raw-write", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err} } return err } func newRawConn(fd *netFD) (*rawConn, error) { return &rawConn{fd: fd}, nil } type rawListener struct { rawConn } func (l *rawListener) Read(func(uintptr) bool) error { return syscall.EINVAL } func (l *rawListener) Write(func(uintptr) bool) error { return syscall.EINVAL } func newRawListener(fd *netFD) (*rawListener, error) { return &rawListener{rawConn{fd: fd}}, nil }