1 // Copyright 2009 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.
5 // +build darwin freebsd linux openbsd windows
19 func boolint(b bool) int {
26 // Generic socket creation.
27 func socket(net string, f, p, t int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err error) {
28 // See ../syscall/exec.go for description of ForkLock.
29 syscall.ForkLock.RLock()
30 s, e := syscall.Socket(f, p, t)
32 syscall.ForkLock.RUnlock()
35 syscall.CloseOnExec(s)
36 syscall.ForkLock.RUnlock()
38 setKernelSpecificSockopt(s, f)
41 e = syscall.Bind(s, la)
48 if fd, err = newFD(s, f, p, net); err != nil {
54 if err = fd.connect(ra); err != nil {
61 sa, _ := syscall.Getsockname(s)
63 sa, _ = syscall.Getpeername(s)
66 fd.setAddr(laddr, raddr)
70 func setsockoptInt(fd *netFD, level, opt int, value int) error {
71 return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd.sysfd, level, opt, value))
74 func setsockoptNsec(fd *netFD, level, opt int, nsec int64) error {
75 var tv = syscall.NsecToTimeval(nsec)
76 return os.NewSyscallError("setsockopt", syscall.SetsockoptTimeval(fd.sysfd, level, opt, &tv))
79 func setReadBuffer(fd *netFD, bytes int) error {
82 return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_RCVBUF, bytes)
85 func setWriteBuffer(fd *netFD, bytes int) error {
88 return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_SNDBUF, bytes)
91 func setReadTimeout(fd *netFD, nsec int64) error {
92 fd.rdeadline_delta = nsec
96 func setWriteTimeout(fd *netFD, nsec int64) error {
97 fd.wdeadline_delta = nsec
101 func setTimeout(fd *netFD, nsec int64) error {
102 if e := setReadTimeout(fd, nsec); e != nil {
105 return setWriteTimeout(fd, nsec)
108 func setReuseAddr(fd *netFD, reuse bool) error {
111 return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, boolint(reuse))
114 func setDontRoute(fd *netFD, dontroute bool) error {
117 return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_DONTROUTE, boolint(dontroute))
120 func setKeepAlive(fd *netFD, keepalive bool) error {
123 return setsockoptInt(fd, syscall.SOL_SOCKET, syscall.SO_KEEPALIVE, boolint(keepalive))
126 func setNoDelay(fd *netFD, noDelay bool) error {
129 return setsockoptInt(fd, syscall.IPPROTO_TCP, syscall.TCP_NODELAY, boolint(noDelay))
132 func setLinger(fd *netFD, sec int) error {
136 l.Linger = int32(sec)
143 e := syscall.SetsockoptLinger(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_LINGER, &l)
144 return os.NewSyscallError("setsockopt", e)
147 type UnknownSocketError struct {
151 func (e *UnknownSocketError) Error() string {
152 return "unknown socket address type " + reflect.TypeOf(e.sa).String()
155 type writerOnly struct {
159 // Fallback implementation of io.ReaderFrom's ReadFrom, when sendfile isn't
161 func genericReadFrom(w io.Writer, r io.Reader) (n int64, err error) {
162 // Use wrapper to hide existing r.ReadFrom from io.Copy.
163 return io.Copy(writerOnly{w}, r)