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 netbsd openbsd windows
16 var listenerBacklog = maxListenerBacklog()
18 // Generic socket creation.
19 func socket(net string, f, t, p int, la, ra syscall.Sockaddr, toAddr func(syscall.Sockaddr) Addr) (fd *netFD, err error) {
20 // See ../syscall/exec.go for description of ForkLock.
21 syscall.ForkLock.RLock()
22 s, err := syscall.Socket(f, t, p)
24 syscall.ForkLock.RUnlock()
27 syscall.CloseOnExec(s)
28 syscall.ForkLock.RUnlock()
30 err = setDefaultSockopts(s, f, t)
37 la, err = listenerSockaddr(s, f, la, toAddr)
42 err = syscall.Bind(s, la)
49 if fd, err = newFD(s, f, t, net); err != nil {
55 if err = fd.connect(ra); err != nil {
63 sa, _ := syscall.Getsockname(s)
65 sa, _ = syscall.Getpeername(s)
68 fd.setAddr(laddr, raddr)
72 type writerOnly struct {
76 // Fallback implementation of io.ReaderFrom's ReadFrom, when sendfile isn't
78 func genericReadFrom(w io.Writer, r io.Reader) (n int64, err error) {
79 // Use wrapper to hide existing r.ReadFrom from io.Copy.
80 return io.Copy(writerOnly{w}, r)