===================================================================
@@ -0,0 +1,16 @@
+// Copyright 2011 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.
+
+// +build cgo,!netgo
+// +build gnu
+
+package net
+
+/*
+#include <netdb.h>
+*/
+
+import "syscall"
+
+const cgoAddrInfoFlags = syscall.AI_CANONNAME | syscall.AI_V4MAPPED | syscall.AI_ALL
===================================================================
@@ -0,0 +1,79 @@
+// Copyright 2011 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 (
+ "io"
+ "os"
+ "syscall"
+)
+
+// maxSendfileSize is the largest chunk size we ask the kernel to copy
+// at a time.
+const maxSendfileSize int = 4 << 20
+
+// sendFile copies the contents of r to c using the sendfile
+// system call to minimize copies.
+//
+// if handled == true, sendFile returns the number of bytes copied and any
+// non-EOF error.
+//
+// if handled == false, sendFile performed no work.
+func sendFile(c *netFD, r io.Reader) (written int64, err error, handled bool) {
+ var remain int64 = 1 << 62 // by default, copy until EOF
+
+ lr, ok := r.(*io.LimitedReader)
+ if ok {
+ remain, r = lr.N, lr.R
+ if remain <= 0 {
+ return 0, nil, true
+ }
+ }
+ f, ok := r.(*os.File)
+ if !ok {
+ return 0, nil, false
+ }
+
+ if err := c.writeLock(); err != nil {
+ return 0, err, true
+ }
+ defer c.writeUnlock()
+
+ dst := c.sysfd
+ src := int(f.Fd())
+ for remain > 0 {
+ n := maxSendfileSize
+ if int64(n) > remain {
+ n = int(remain)
+ }
+ n, err1 := syscall.Sendfile(dst, src, nil, n)
+ if n > 0 {
+ written += int64(n)
+ remain -= int64(n)
+ }
+ if n == 0 && err1 == nil {
+ break
+ }
+ if err1 == syscall.EAGAIN {
+ if err1 = c.pd.waitWrite(); err1 == nil {
+ continue
+ }
+ }
+ if err1 != nil {
+ // This includes syscall.ENOSYS (no kernel
+ // support) and syscall.EINVAL (fd types which
+ // don't implement sendfile)
+ err = err1
+ break
+ }
+ }
+ if lr != nil {
+ lr.N = remain
+ }
+ if err != nil {
+ err = os.NewSyscallError("sendfile", err)
+ }
+ return written, err, written > 0
+}
===================================================================
@@ -0,0 +1,14 @@
+// Copyright 2014 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.
+
+// +build gnu
+
+package net
+
+import "syscall"
+
+func maxListenerBacklog() int {
+ // From /usr/include/i386-gnu/bits/socket.h
+ return syscall.SOMAXCONN
+}
===================================================================
@@ -0,0 +1,45 @@
+// Copyright 2011 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.
+
+// +build gnu
+
+package net
+
+import (
+ "os"
+ "syscall"
+)
+
+func setDefaultSockopts(s, family, sotype int, ipv6only bool) error {
+ if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
+ // Allow both IP versions even if the OS default
+ // is otherwise. Note that some operating systems
+ // never admit this option.
+ syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
+ }
+ // Allow broadcast.
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1))
+}
+
+func setDefaultListenerSockopts(s int) error {
+ // Allow reuse of recently-used addresses.
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1))
+}
+
+func setDefaultMulticastSockopts(s int) error {
+ // Allow multicast UDP and raw IP datagram sockets to listen
+ // concurrently across multiple listeners.
+ if err := syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1); err != nil {
+ return os.NewSyscallError("setsockopt", err)
+ }
+ // Allow reuse of recently-used ports.
+ // This option is supported only in descendants of 4.4BSD,
+ // to make an effective multicast application that requires
+ // quick draw possible.
+ // Not supported on GNU/Hurd
+ //if syscall.SO_REUSEPORT != 0 {
+ // return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEPORT, 1))
+ //}
+ return nil
+}
===================================================================
@@ -0,0 +1,30 @@
+// Copyright 2011 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.
+
+// +build gnu
+
+package net
+
+import (
+ "os"
+ "syscall"
+)
+
+func setIPv4MulticastInterface(fd *netFD, ifi *Interface) error {
+ ip, err := interfaceToIPv4Addr(ifi)
+ if err != nil {
+ return os.NewSyscallError("setsockopt", err)
+ }
+ var a [4]byte
+ copy(a[:], ip.To4())
+ if err := fd.incref(); err != nil {
+ return err
+ }
+ defer fd.decref()
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInet4Addr(fd.sysfd, syscall.IPPROTO_IP, syscall.IP_MULTICAST_IF, a))
+}
+
+func setIPv4MulticastLoopback(fd *netFD, v bool) error {
+ return syscall.ENOPROTOOPT
+}