ipv6: deduplicate socket option code

Change-Id: I836cdf68901dc77bc4c086cabd9d43fd033fbf1d
Reviewed-on: https://go-review.googlesource.com/27736Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: Mikio Hara <mikioh.mikioh@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>

ipv6/icmp_windows.go

@@ -4,10 +4,6 @@
 
 package ipv6
 
-type sysICMPv6Filter struct {
-	// TODO(mikio): implement this
-}
-
 func (f *sysICMPv6Filter) accept(typ ICMPType) {
 	// TODO(mikio): implement this
 }

ipv6/sockopt_asmreq_unix.go → ipv6/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 linux netbsd openbsd
+// +build darwin dragonfly freebsd linux netbsd openbsd windows
 
 package ipv6
 

ipv6/sockopt_asmreq_windows.go

-// Copyright 2013 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 ipv6
-
-import (
-	"net"
-	"os"
-	"syscall"
-	"unsafe"
-)
-
-func setsockoptIPMreq(s uintptr, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
-	var mreq sysIPv6Mreq
-	copy(mreq.Multiaddr[:], grp)
-	if ifi != nil {
-		mreq.setIfindex(ifi.Index)
-	}
-	return os.NewSyscallError("setsockopt", syscall.Setsockopt(syscall.Handle(s), int32(opt.level), int32(opt.name), (*byte)(unsafe.Pointer(&mreq)), sysSizeofIPv6Mreq))
-}

ipv6/sockopt_unix.go → ipv6/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 ipv6
 

ipv6/sockopt_windows.go

-// Copyright 2013 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 ipv6
-
-import (
-	"net"
-	"os"
-	"syscall"
-	"unsafe"
-)
-
-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), int32(opt.level), 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), int32(opt.level), 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
-	}
-	var i int32
-	l := int32(4)
-	if err := syscall.Getsockopt(syscall.Handle(s), int32(opt.level), int32(opt.name), (*byte)(unsafe.Pointer(&i)), &l); err != nil {
-		return nil, os.NewSyscallError("getsockopt", err)
-	}
-	if i == 0 {
-		return nil, nil
-	}
-	ifi, err := net.InterfaceByIndex(int(i))
-	if err != nil {
-		return nil, err
-	}
-	return ifi, nil
-}
-
-func setInterface(s uintptr, opt *sockOpt, ifi *net.Interface) error {
-	if opt.name < 1 || opt.typ != ssoTypeInterface {
-		return errOpNoSupport
-	}
-	var i int32
-	if ifi != nil {
-		i = int32(ifi.Index)
-	}
-	return os.NewSyscallError("setsockopt", syscall.Setsockopt(syscall.Handle(s), int32(opt.level), int32(opt.name), (*byte)(unsafe.Pointer(&i)), 4))
-}
-
-func getICMPFilter(s uintptr, opt *sockOpt) (*ICMPFilter, error) {
-	return nil, errOpNoSupport
-}
-
-func setICMPFilter(s uintptr, opt *sockOpt, f *ICMPFilter) error {
-	return errOpNoSupport
-}
-
-func getMTUInfo(s uintptr, opt *sockOpt) (*net.Interface, int, error) {
-	return nil, 0, 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, ifi, grp)
-}
-
-func setSourceGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
-	// TODO(mikio): implement this
-	return errOpNoSupport
-}

ipv6/sys_windows.go

@@ -24,6 +24,8 @@ const (
 	sysSizeofSockaddrInet6 = 0x1c
 
 	sysSizeofIPv6Mreq     = 0x14
+	sysSizeofIPv6Mtuinfo  = 0x20
+	sysSizeofICMPv6Filter = 0
 )
 
 type sysSockaddrInet6 struct {
@@ -39,6 +41,15 @@ type sysIPv6Mreq struct {
 	Interface uint32
 }
 
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysICMPv6Filter struct {
+	// TODO(mikio): implement this
+}
+
 var (
 	ctlOpts = [ctlMax]ctlOpt{}
 

ipv6/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 ipv6
+
+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))
+}