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, ipv6only bool, 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, ipv6only)
36 var bla syscall.Sockaddr
38 bla, err = listenerSockaddr(s, f, la, toAddr)
43 err = syscall.Bind(s, bla)
50 if fd, err = newFD(s, f, t, net); err != nil {
56 if err = fd.connect(ra); err != nil {
64 sa, _ := syscall.Getsockname(s)
66 if la != nil && bla != la {
71 sa, _ = syscall.Getpeername(s)
74 fd.setAddr(laddr, raddr)
78 type writerOnly struct {
82 // Fallback implementation of io.ReaderFrom's ReadFrom, when sendfile isn't
84 func genericReadFrom(w io.Writer, r io.Reader) (n int64, err error) {
85 // Use wrapper to hide existing r.ReadFrom from io.Copy.
86 return io.Copy(writerOnly{w}, r)