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Source file src/net/rawconn.go

Documentation: net

  // 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(mikio): On Windows, the Read and Write methods of
  // syscall.RawConn are not implemented.
  
  // BUG(mikio): On NaCl 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
  }
  

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