1 // Copyright 2017 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package net 6 7 import ( 8 "runtime" 9 "syscall" 10 ) 11 12 // BUG(mikio): On Windows, the Read and Write methods of 13 // syscall.RawConn are not implemented. 14 15 // BUG(mikio): On NaCl and Plan 9, the Control, Read and Write methods 16 // of syscall.RawConn are not implemented. 17 18 type rawConn struct { 19 fd *netFD 20 } 21 22 func (c *rawConn) ok() bool { return c != nil && c.fd != nil } 23 24 func (c *rawConn) Control(f func(uintptr)) error { 25 if !c.ok() { 26 return syscall.EINVAL 27 } 28 err := c.fd.pfd.RawControl(f) 29 runtime.KeepAlive(c.fd) 30 if err != nil { 31 err = &OpError{Op: "raw-control", Net: c.fd.net, Source: nil, Addr: c.fd.laddr, Err: err} 32 } 33 return err 34 } 35 36 func (c *rawConn) Read(f func(uintptr) bool) error { 37 if !c.ok() { 38 return syscall.EINVAL 39 } 40 err := c.fd.pfd.RawRead(f) 41 runtime.KeepAlive(c.fd) 42 if err != nil { 43 err = &OpError{Op: "raw-read", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err} 44 } 45 return err 46 } 47 48 func (c *rawConn) Write(f func(uintptr) bool) error { 49 if !c.ok() { 50 return syscall.EINVAL 51 } 52 err := c.fd.pfd.RawWrite(f) 53 runtime.KeepAlive(c.fd) 54 if err != nil { 55 err = &OpError{Op: "raw-write", Net: c.fd.net, Source: c.fd.laddr, Addr: c.fd.raddr, Err: err} 56 } 57 return err 58 } 59 60 func newRawConn(fd *netFD) (*rawConn, error) { 61 return &rawConn{fd: fd}, nil 62 } 63 64 type rawListener struct { 65 rawConn 66 } 67 68 func (l *rawListener) Read(func(uintptr) bool) error { 69 return syscall.EINVAL 70 } 71 72 func (l *rawListener) Write(func(uintptr) bool) error { 73 return syscall.EINVAL 74 } 75 76 func newRawListener(fd *netFD) (*rawListener, error) { 77 return &rawListener{rawConn{fd: fd}}, nil 78 } 79
