ipv4: deduplicate socket option code

Change-Id: If22f722cf87f7e5833b9c9aea0a078db83f37c26
Reviewed-on: https://go-review.googlesource.com/27734Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

ipv4/sockopt_asmreq_unix.go → ipv4/sockopt_asmreq_posix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd netbsd openbsd
+// +build darwin dragonfly freebsd netbsd openbsd windows
 
 package ipv4
 

ipv4/sockopt_asmreq_windows.go

-// Copyright 2012 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 ipv4
-
-import (
-	"net"
-	"os"
-	"syscall"
-	"unsafe"
-
-	"golang.org/x/net/internal/iana"
-)
-
-func setsockoptIPMreq(s uintptr, name int, ifi *net.Interface, grp net.IP) error {
-	mreq := sysIPMreq{Multiaddr: [4]byte{grp[0], grp[1], grp[2], grp[3]}}
-	if err := setIPMreqInterface(&mreq, ifi); err != nil {
-		return err
-	}
-	return os.NewSyscallError("setsockopt", syscall.Setsockopt(syscall.Handle(s), iana.ProtocolIP, int32(name), (*byte)(unsafe.Pointer(&mreq)), int32(sysSizeofIPMreq)))
-}
-
-func getsockoptInterface(s uintptr, name int) (*net.Interface, error) {
-	var b [4]byte
-	l := int32(4)
-	if err := syscall.Getsockopt(syscall.Handle(s), iana.ProtocolIP, int32(name), (*byte)(unsafe.Pointer(&b[0])), &l); err != nil {
-		return nil, os.NewSyscallError("getsockopt", err)
-	}
-	ifi, err := netIP4ToInterface(net.IPv4(b[0], b[1], b[2], b[3]))
-	if err != nil {
-		return nil, err
-	}
-	return ifi, nil
-}
-
-func setsockoptInterface(s uintptr, name int, ifi *net.Interface) error {
-	ip, err := netInterfaceToIP4(ifi)
-	if err != nil {
-		return err
-	}
-	var b [4]byte
-	copy(b[:], ip)
-	return os.NewSyscallError("setsockopt", syscall.Setsockopt(syscall.Handle(s), iana.ProtocolIP, int32(name), (*byte)(unsafe.Pointer(&b[0])), 4))
-}

ipv4/sockopt_unix.go → ipv4/sockopt_posix.go

@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin dragonfly freebsd linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd windows
 
 package ipv4
 

ipv4/sockopt_windows.go

-// Copyright 2012 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 ipv4
-
-import (
-	"net"
-	"os"
-	"syscall"
-	"unsafe"
-
-	"golang.org/x/net/internal/iana"
-)
-
-func getInt(s uintptr, opt *sockOpt) (int, error) {
-	if opt.name < 1 || opt.typ != ssoTypeInt {
-		return 0, errOpNoSupport
-	}
-	var i int32
-	l := int32(4)
-	if err := syscall.Getsockopt(syscall.Handle(s), iana.ProtocolIP, int32(opt.name), (*byte)(unsafe.Pointer(&i)), &l); err != nil {
-		return 0, os.NewSyscallError("getsockopt", err)
-	}
-	return int(i), nil
-}
-
-func setInt(s uintptr, opt *sockOpt, v int) error {
-	if opt.name < 1 || opt.typ != ssoTypeInt {
-		return errOpNoSupport
-	}
-	i := int32(v)
-	return os.NewSyscallError("setsockopt", syscall.Setsockopt(syscall.Handle(s), iana.ProtocolIP, int32(opt.name), (*byte)(unsafe.Pointer(&i)), 4))
-}
-
-func getInterface(s uintptr, opt *sockOpt) (*net.Interface, error) {
-	if opt.name < 1 || opt.typ != ssoTypeInterface {
-		return nil, errOpNoSupport
-	}
-	return getsockoptInterface(s, opt.name)
-}
-
-func setInterface(s uintptr, opt *sockOpt, ifi *net.Interface) error {
-	if opt.name < 1 || opt.typ != ssoTypeInterface {
-		return errOpNoSupport
-	}
-	return setsockoptInterface(s, opt.name, ifi)
-}
-
-func getICMPFilter(s uintptr, opt *sockOpt) (*ICMPFilter, error) {
-	return nil, errOpNoSupport
-}
-
-func setICMPFilter(s uintptr, opt *sockOpt, f *ICMPFilter) error {
-	return errOpNoSupport
-}
-
-func setGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
-	if opt.name < 1 || opt.typ != ssoTypeIPMreq {
-		return errOpNoSupport
-	}
-	return setsockoptIPMreq(s, opt.name, ifi, grp)
-}
-
-func setSourceGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
-	// TODO(mikio): implement this
-	return errOpNoSupport
-}

ipv4/syscall_windows.go

+// Copyright 2016 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 ipv4
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func getsockopt(s uintptr, level, name int, v unsafe.Pointer, l *uint32) error {
+	return syscall.Getsockopt(syscall.Handle(s), int32(level), int32(name), (*byte)(v), (*int32)(unsafe.Pointer(l)))
+}
+
+func setsockopt(s uintptr, level, name int, v unsafe.Pointer, l uint32) error {
+	return syscall.Setsockopt(syscall.Handle(s), int32(level), int32(name), (*byte)(v), int32(l))
+}