Adding ability to serve TLS directly from Mattermost server (#4119)

81 files changed, 7935 insertions, 0 deletions

diff --git a/vendor/golang.org/x/net/ipv6/bpf_test.go b/vendor/golang.org/x/net/ipv6/bpf_test.go
new file mode 100644
index 000000000..03d478dc0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/bpf_test.go
@@ -0,0 +1,93 @@
+// 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_test
+
+import (
+	"net"
+	"runtime"
+	"testing"
+	"time"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/ipv6"
+)
+
+func TestBPF(t *testing.T) {
+	if runtime.GOOS != "linux" {
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+
+	l, err := net.ListenPacket("udp6", "[::1]:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer l.Close()
+
+	p := ipv6.NewPacketConn(l)
+
+	// This filter accepts UDP packets whose first payload byte is
+	// even.
+	prog, err := bpf.Assemble([]bpf.Instruction{
+		// Load the first byte of the payload (skipping UDP header).
+		bpf.LoadAbsolute{Off: 8, Size: 1},
+		// Select LSB of the byte.
+		bpf.ALUOpConstant{Op: bpf.ALUOpAnd, Val: 1},
+		// Byte is even?
+		bpf.JumpIf{Cond: bpf.JumpEqual, Val: 0, SkipFalse: 1},
+		// Accept.
+		bpf.RetConstant{Val: 4096},
+		// Ignore.
+		bpf.RetConstant{Val: 0},
+	})
+	if err != nil {
+		t.Fatalf("compiling BPF: %s", err)
+	}
+
+	if err = p.SetBPF(prog); err != nil {
+		t.Fatalf("attaching filter to Conn: %s", err)
+	}
+
+	s, err := net.Dial("udp6", l.LocalAddr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer s.Close()
+	go func() {
+		for i := byte(0); i < 10; i++ {
+			s.Write([]byte{i})
+		}
+	}()
+
+	l.SetDeadline(time.Now().Add(2 * time.Second))
+	seen := make([]bool, 5)
+	for {
+		var b [512]byte
+		n, _, err := l.ReadFrom(b[:])
+		if err != nil {
+			t.Fatalf("reading from listener: %s", err)
+		}
+		if n != 1 {
+			t.Fatalf("unexpected packet length, want 1, got %d", n)
+		}
+		if b[0] >= 10 {
+			t.Fatalf("unexpected byte, want 0-9, got %d", b[0])
+		}
+		if b[0]%2 != 0 {
+			t.Fatalf("got odd byte %d, wanted only even bytes", b[0])
+		}
+		seen[b[0]/2] = true
+
+		seenAll := true
+		for _, v := range seen {
+			if !v {
+				seenAll = false
+				break
+			}
+		}
+		if seenAll {
+			break
+		}
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/bpfopt_linux.go b/vendor/golang.org/x/net/ipv6/bpfopt_linux.go
new file mode 100644
index 000000000..328427cba
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/bpfopt_linux.go
@@ -0,0 +1,28 @@
+// 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 (
+	"os"
+	"unsafe"
+
+	"golang.org/x/net/bpf"
+	"golang.org/x/net/internal/netreflect"
+)
+
+// SetBPF attaches a BPF program to the connection.
+//
+// Only supported on Linux.
+func (c *dgramOpt) SetBPF(filter []bpf.RawInstruction) error {
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	prog := sysSockFProg{
+		Len:    uint16(len(filter)),
+		Filter: (*sysSockFilter)(unsafe.Pointer(&filter[0])),
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, sysSOL_SOCKET, sysSO_ATTACH_FILTER, unsafe.Pointer(&prog), uint32(unsafe.Sizeof(prog))))
+}
diff --git a/vendor/golang.org/x/net/ipv6/bpfopt_stub.go b/vendor/golang.org/x/net/ipv6/bpfopt_stub.go
new file mode 100644
index 000000000..2e4de5f0d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/bpfopt_stub.go
@@ -0,0 +1,16 @@
+// 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.
+
+// +build !linux
+
+package ipv6
+
+import "golang.org/x/net/bpf"
+
+// SetBPF attaches a BPF program to the connection.
+//
+// Only supported on Linux.
+func (c *dgramOpt) SetBPF(filter []bpf.RawInstruction) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/control.go b/vendor/golang.org/x/net/ipv6/control.go
new file mode 100644
index 000000000..b7362aae7
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control.go
@@ -0,0 +1,85 @@
+// 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 (
+	"fmt"
+	"net"
+	"sync"
+)
+
+// Note that RFC 3542 obsoletes RFC 2292 but OS X Snow Leopard and the
+// former still support RFC 2292 only.  Please be aware that almost
+// all protocol implementations prohibit using a combination of RFC
+// 2292 and RFC 3542 for some practical reasons.
+
+type rawOpt struct {
+	sync.RWMutex
+	cflags ControlFlags
+}
+
+func (c *rawOpt) set(f ControlFlags)        { c.cflags |= f }
+func (c *rawOpt) clear(f ControlFlags)      { c.cflags &^= f }
+func (c *rawOpt) isset(f ControlFlags) bool { return c.cflags&f != 0 }
+
+// A ControlFlags represents per packet basis IP-level socket option
+// control flags.
+type ControlFlags uint
+
+const (
+	FlagTrafficClass ControlFlags = 1 << iota // pass the traffic class on the received packet
+	FlagHopLimit                              // pass the hop limit on the received packet
+	FlagSrc                                   // pass the source address on the received packet
+	FlagDst                                   // pass the destination address on the received packet
+	FlagInterface                             // pass the interface index on the received packet
+	FlagPathMTU                               // pass the path MTU on the received packet path
+)
+
+const flagPacketInfo = FlagDst | FlagInterface
+
+// A ControlMessage represents per packet basis IP-level socket
+// options.
+type ControlMessage struct {
+	// Receiving socket options: SetControlMessage allows to
+	// receive the options from the protocol stack using ReadFrom
+	// method of PacketConn.
+	//
+	// Specifying socket options: ControlMessage for WriteTo
+	// method of PacketConn allows to send the options to the
+	// protocol stack.
+	//
+	TrafficClass int    // traffic class, must be 1 <= value <= 255 when specifying
+	HopLimit     int    // hop limit, must be 1 <= value <= 255 when specifying
+	Src          net.IP // source address, specifying only
+	Dst          net.IP // destination address, receiving only
+	IfIndex      int    // interface index, must be 1 <= value when specifying
+	NextHop      net.IP // next hop address, specifying only
+	MTU          int    // path MTU, receiving only
+}
+
+func (cm *ControlMessage) String() string {
+	if cm == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("tclass=%#x hoplim=%d src=%v dst=%v ifindex=%d nexthop=%v mtu=%d", cm.TrafficClass, cm.HopLimit, cm.Src, cm.Dst, cm.IfIndex, cm.NextHop, cm.MTU)
+}
+
+// Ancillary data socket options
+const (
+	ctlTrafficClass = iota // header field
+	ctlHopLimit            // header field
+	ctlPacketInfo          // inbound or outbound packet path
+	ctlNextHop             // nexthop
+	ctlPathMTU             // path mtu
+	ctlMax
+)
+
+// A ctlOpt represents a binding for ancillary data socket option.
+type ctlOpt struct {
+	name    int // option name, must be equal or greater than 1
+	length  int // option length
+	marshal func([]byte, *ControlMessage) []byte
+	parse   func(*ControlMessage, []byte)
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_rfc2292_unix.go b/vendor/golang.org/x/net/ipv6/control_rfc2292_unix.go
new file mode 100644
index 000000000..80ec2e2f0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_rfc2292_unix.go
@@ -0,0 +1,55 @@
+// 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.
+
+// +build darwin
+
+package ipv6
+
+import (
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+)
+
+func marshal2292HopLimit(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_2292HOPLIMIT
+	m.SetLen(syscall.CmsgLen(4))
+	if cm != nil {
+		data := b[syscall.CmsgLen(0):]
+		nativeEndian.PutUint32(data[:4], uint32(cm.HopLimit))
+	}
+	return b[syscall.CmsgSpace(4):]
+}
+
+func marshal2292PacketInfo(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_2292PKTINFO
+	m.SetLen(syscall.CmsgLen(sysSizeofInet6Pktinfo))
+	if cm != nil {
+		pi := (*sysInet6Pktinfo)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
+		if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
+			copy(pi.Addr[:], ip)
+		}
+		if cm.IfIndex > 0 {
+			pi.setIfindex(cm.IfIndex)
+		}
+	}
+	return b[syscall.CmsgSpace(sysSizeofInet6Pktinfo):]
+}
+
+func marshal2292NextHop(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_2292NEXTHOP
+	m.SetLen(syscall.CmsgLen(sysSizeofSockaddrInet6))
+	if cm != nil {
+		sa := (*sysSockaddrInet6)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
+		sa.setSockaddr(cm.NextHop, cm.IfIndex)
+	}
+	return b[syscall.CmsgSpace(sysSizeofSockaddrInet6):]
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_rfc3542_unix.go b/vendor/golang.org/x/net/ipv6/control_rfc3542_unix.go
new file mode 100644
index 000000000..f344d16d0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_rfc3542_unix.go
@@ -0,0 +1,99 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package ipv6
+
+import (
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+)
+
+func marshalTrafficClass(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_TCLASS
+	m.SetLen(syscall.CmsgLen(4))
+	if cm != nil {
+		data := b[syscall.CmsgLen(0):]
+		nativeEndian.PutUint32(data[:4], uint32(cm.TrafficClass))
+	}
+	return b[syscall.CmsgSpace(4):]
+}
+
+func parseTrafficClass(cm *ControlMessage, b []byte) {
+	cm.TrafficClass = int(nativeEndian.Uint32(b[:4]))
+}
+
+func marshalHopLimit(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_HOPLIMIT
+	m.SetLen(syscall.CmsgLen(4))
+	if cm != nil {
+		data := b[syscall.CmsgLen(0):]
+		nativeEndian.PutUint32(data[:4], uint32(cm.HopLimit))
+	}
+	return b[syscall.CmsgSpace(4):]
+}
+
+func parseHopLimit(cm *ControlMessage, b []byte) {
+	cm.HopLimit = int(nativeEndian.Uint32(b[:4]))
+}
+
+func marshalPacketInfo(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_PKTINFO
+	m.SetLen(syscall.CmsgLen(sysSizeofInet6Pktinfo))
+	if cm != nil {
+		pi := (*sysInet6Pktinfo)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
+		if ip := cm.Src.To16(); ip != nil && ip.To4() == nil {
+			copy(pi.Addr[:], ip)
+		}
+		if cm.IfIndex > 0 {
+			pi.setIfindex(cm.IfIndex)
+		}
+	}
+	return b[syscall.CmsgSpace(sysSizeofInet6Pktinfo):]
+}
+
+func parsePacketInfo(cm *ControlMessage, b []byte) {
+	pi := (*sysInet6Pktinfo)(unsafe.Pointer(&b[0]))
+	cm.Dst = pi.Addr[:]
+	cm.IfIndex = int(pi.Ifindex)
+}
+
+func marshalNextHop(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_NEXTHOP
+	m.SetLen(syscall.CmsgLen(sysSizeofSockaddrInet6))
+	if cm != nil {
+		sa := (*sysSockaddrInet6)(unsafe.Pointer(&b[syscall.CmsgLen(0)]))
+		sa.setSockaddr(cm.NextHop, cm.IfIndex)
+	}
+	return b[syscall.CmsgSpace(sysSizeofSockaddrInet6):]
+}
+
+func parseNextHop(cm *ControlMessage, b []byte) {
+}
+
+func marshalPathMTU(b []byte, cm *ControlMessage) []byte {
+	m := (*syscall.Cmsghdr)(unsafe.Pointer(&b[0]))
+	m.Level = iana.ProtocolIPv6
+	m.Type = sysIPV6_PATHMTU
+	m.SetLen(syscall.CmsgLen(sysSizeofIPv6Mtuinfo))
+	return b[syscall.CmsgSpace(sysSizeofIPv6Mtuinfo):]
+}
+
+func parsePathMTU(cm *ControlMessage, b []byte) {
+	mi := (*sysIPv6Mtuinfo)(unsafe.Pointer(&b[0]))
+	cm.Dst = mi.Addr.Addr[:]
+	cm.IfIndex = int(mi.Addr.Scope_id)
+	cm.MTU = int(mi.Mtu)
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_stub.go b/vendor/golang.org/x/net/ipv6/control_stub.go
new file mode 100644
index 000000000..952b2bd2a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_stub.go
@@ -0,0 +1,23 @@
+// 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.
+
+// +build nacl plan9 solaris
+
+package ipv6
+
+func setControlMessage(s uintptr, opt *rawOpt, cf ControlFlags, on bool) error {
+	return errOpNoSupport
+}
+
+func newControlMessage(opt *rawOpt) (oob []byte) {
+	return nil
+}
+
+func parseControlMessage(b []byte) (*ControlMessage, error) {
+	return nil, errOpNoSupport
+}
+
+func marshalControlMessage(cm *ControlMessage) (oob []byte) {
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_unix.go b/vendor/golang.org/x/net/ipv6/control_unix.go
new file mode 100644
index 000000000..46fbdcbe3
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_unix.go
@@ -0,0 +1,166 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd
+
+package ipv6
+
+import (
+	"os"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+)
+
+func setControlMessage(s uintptr, opt *rawOpt, cf ControlFlags, on bool) error {
+	opt.Lock()
+	defer opt.Unlock()
+	if cf&FlagTrafficClass != 0 && sockOpts[ssoReceiveTrafficClass].name > 0 {
+		if err := setInt(s, &sockOpts[ssoReceiveTrafficClass], boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagTrafficClass)
+		} else {
+			opt.clear(FlagTrafficClass)
+		}
+	}
+	if cf&FlagHopLimit != 0 && sockOpts[ssoReceiveHopLimit].name > 0 {
+		if err := setInt(s, &sockOpts[ssoReceiveHopLimit], boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagHopLimit)
+		} else {
+			opt.clear(FlagHopLimit)
+		}
+	}
+	if cf&flagPacketInfo != 0 && sockOpts[ssoReceivePacketInfo].name > 0 {
+		if err := setInt(s, &sockOpts[ssoReceivePacketInfo], boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(cf & flagPacketInfo)
+		} else {
+			opt.clear(cf & flagPacketInfo)
+		}
+	}
+	if cf&FlagPathMTU != 0 && sockOpts[ssoReceivePathMTU].name > 0 {
+		if err := setInt(s, &sockOpts[ssoReceivePathMTU], boolint(on)); err != nil {
+			return err
+		}
+		if on {
+			opt.set(FlagPathMTU)
+		} else {
+			opt.clear(FlagPathMTU)
+		}
+	}
+	return nil
+}
+
+func newControlMessage(opt *rawOpt) (oob []byte) {
+	opt.RLock()
+	var l int
+	if opt.isset(FlagTrafficClass) && ctlOpts[ctlTrafficClass].name > 0 {
+		l += syscall.CmsgSpace(ctlOpts[ctlTrafficClass].length)
+	}
+	if opt.isset(FlagHopLimit) && ctlOpts[ctlHopLimit].name > 0 {
+		l += syscall.CmsgSpace(ctlOpts[ctlHopLimit].length)
+	}
+	if opt.isset(flagPacketInfo) && ctlOpts[ctlPacketInfo].name > 0 {
+		l += syscall.CmsgSpace(ctlOpts[ctlPacketInfo].length)
+	}
+	if opt.isset(FlagPathMTU) && ctlOpts[ctlPathMTU].name > 0 {
+		l += syscall.CmsgSpace(ctlOpts[ctlPathMTU].length)
+	}
+	if l > 0 {
+		oob = make([]byte, l)
+		b := oob
+		if opt.isset(FlagTrafficClass) && ctlOpts[ctlTrafficClass].name > 0 {
+			b = ctlOpts[ctlTrafficClass].marshal(b, nil)
+		}
+		if opt.isset(FlagHopLimit) && ctlOpts[ctlHopLimit].name > 0 {
+			b = ctlOpts[ctlHopLimit].marshal(b, nil)
+		}
+		if opt.isset(flagPacketInfo) && ctlOpts[ctlPacketInfo].name > 0 {
+			b = ctlOpts[ctlPacketInfo].marshal(b, nil)
+		}
+		if opt.isset(FlagPathMTU) && ctlOpts[ctlPathMTU].name > 0 {
+			b = ctlOpts[ctlPathMTU].marshal(b, nil)
+		}
+	}
+	opt.RUnlock()
+	return
+}
+
+func parseControlMessage(b []byte) (*ControlMessage, error) {
+	if len(b) == 0 {
+		return nil, nil
+	}
+	cmsgs, err := syscall.ParseSocketControlMessage(b)
+	if err != nil {
+		return nil, os.NewSyscallError("parse socket control message", err)
+	}
+	cm := &ControlMessage{}
+	for _, m := range cmsgs {
+		if m.Header.Level != iana.ProtocolIPv6 {
+			continue
+		}
+		switch int(m.Header.Type) {
+		case ctlOpts[ctlTrafficClass].name:
+			ctlOpts[ctlTrafficClass].parse(cm, m.Data[:])
+		case ctlOpts[ctlHopLimit].name:
+			ctlOpts[ctlHopLimit].parse(cm, m.Data[:])
+		case ctlOpts[ctlPacketInfo].name:
+			ctlOpts[ctlPacketInfo].parse(cm, m.Data[:])
+		case ctlOpts[ctlPathMTU].name:
+			ctlOpts[ctlPathMTU].parse(cm, m.Data[:])
+		}
+	}
+	return cm, nil
+}
+
+func marshalControlMessage(cm *ControlMessage) (oob []byte) {
+	if cm == nil {
+		return
+	}
+	var l int
+	tclass := false
+	if ctlOpts[ctlTrafficClass].name > 0 && cm.TrafficClass > 0 {
+		tclass = true
+		l += syscall.CmsgSpace(ctlOpts[ctlTrafficClass].length)
+	}
+	hoplimit := false
+	if ctlOpts[ctlHopLimit].name > 0 && cm.HopLimit > 0 {
+		hoplimit = true
+		l += syscall.CmsgSpace(ctlOpts[ctlHopLimit].length)
+	}
+	pktinfo := false
+	if ctlOpts[ctlPacketInfo].name > 0 && (cm.Src.To16() != nil && cm.Src.To4() == nil || cm.IfIndex > 0) {
+		pktinfo = true
+		l += syscall.CmsgSpace(ctlOpts[ctlPacketInfo].length)
+	}
+	nexthop := false
+	if ctlOpts[ctlNextHop].name > 0 && cm.NextHop.To16() != nil && cm.NextHop.To4() == nil {
+		nexthop = true
+		l += syscall.CmsgSpace(ctlOpts[ctlNextHop].length)
+	}
+	if l > 0 {
+		oob = make([]byte, l)
+		b := oob
+		if tclass {
+			b = ctlOpts[ctlTrafficClass].marshal(b, cm)
+		}
+		if hoplimit {
+			b = ctlOpts[ctlHopLimit].marshal(b, cm)
+		}
+		if pktinfo {
+			b = ctlOpts[ctlPacketInfo].marshal(b, cm)
+		}
+		if nexthop {
+			b = ctlOpts[ctlNextHop].marshal(b, cm)
+		}
+	}
+	return
+}
diff --git a/vendor/golang.org/x/net/ipv6/control_windows.go b/vendor/golang.org/x/net/ipv6/control_windows.go
new file mode 100644
index 000000000..2773a5204
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/control_windows.go
@@ -0,0 +1,27 @@
+// 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 "syscall"
+
+func setControlMessage(s uintptr, opt *rawOpt, cf ControlFlags, on bool) error {
+	// TODO(mikio): implement this
+	return syscall.EWINDOWS
+}
+
+func newControlMessage(opt *rawOpt) (oob []byte) {
+	// TODO(mikio): implement this
+	return nil
+}
+
+func parseControlMessage(b []byte) (*ControlMessage, error) {
+	// TODO(mikio): implement this
+	return nil, syscall.EWINDOWS
+}
+
+func marshalControlMessage(cm *ControlMessage) (oob []byte) {
+	// TODO(mikio): implement this
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/defs_darwin.go b/vendor/golang.org/x/net/ipv6/defs_darwin.go
new file mode 100644
index 000000000..4c7f476a8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_darwin.go
@@ -0,0 +1,112 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#define __APPLE_USE_RFC_3542
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+
+	sysIPV6_PORTRANGE    = C.IPV6_PORTRANGE
+	sysICMP6_FILTER      = C.ICMP6_FILTER
+	sysIPV6_2292PKTINFO  = C.IPV6_2292PKTINFO
+	sysIPV6_2292HOPLIMIT = C.IPV6_2292HOPLIMIT
+	sysIPV6_2292NEXTHOP  = C.IPV6_2292NEXTHOP
+	sysIPV6_2292HOPOPTS  = C.IPV6_2292HOPOPTS
+	sysIPV6_2292DSTOPTS  = C.IPV6_2292DSTOPTS
+	sysIPV6_2292RTHDR    = C.IPV6_2292RTHDR
+
+	sysIPV6_2292PKTOPTIONS = C.IPV6_2292PKTOPTIONS
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+	sysIPV6_TCLASS     = C.IPV6_TCLASS
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO = C.IPV6_RECVPKTINFO
+
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PREFER_TEMPADDR = C.IPV6_PREFER_TEMPADDR
+
+	sysIPV6_MSFILTER            = C.IPV6_MSFILTER
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+
+	sysIPV6_BOUND_IF = C.IPV6_BOUND_IF
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sysSizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sysSizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo    = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo     = C.sizeof_struct_ip6_mtuinfo
+
+	sysSizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sysSizeofGroupReq       = C.sizeof_struct_group_req
+	sysSizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysSockaddrStorage C.struct_sockaddr_storage
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysICMPv6Filter C.struct_icmp6_filter
+
+type sysGroupReq C.struct_group_req
+
+type sysGroupSourceReq C.struct_group_source_req
diff --git a/vendor/golang.org/x/net/ipv6/defs_dragonfly.go b/vendor/golang.org/x/net/ipv6/defs_dragonfly.go
new file mode 100644
index 000000000..c72487ceb
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_dragonfly.go
@@ -0,0 +1,84 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PREFER_TEMPADDR = C.IPV6_PREFER_TEMPADDR
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sysSizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sysSizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysICMPv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_freebsd.go b/vendor/golang.org/x/net/ipv6/defs_freebsd.go
new file mode 100644
index 000000000..de199ec6a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_freebsd.go
@@ -0,0 +1,105 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PREFER_TEMPADDR = C.IPV6_PREFER_TEMPADDR
+
+	sysIPV6_BINDANY = C.IPV6_BINDANY
+
+	sysIPV6_MSFILTER = C.IPV6_MSFILTER
+
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sysSizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sysSizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo    = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo     = C.sizeof_struct_ip6_mtuinfo
+
+	sysSizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sysSizeofGroupReq       = C.sizeof_struct_group_req
+	sysSizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysSockaddrStorage C.struct_sockaddr_storage
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysGroupReq C.struct_group_req
+
+type sysGroupSourceReq C.struct_group_source_req
+
+type sysICMPv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_linux.go b/vendor/golang.org/x/net/ipv6/defs_linux.go
new file mode 100644
index 000000000..664305d8b
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_linux.go
@@ -0,0 +1,145 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/ipv6.h>
+#include <linux/icmpv6.h>
+#include <linux/filter.h>
+#include <sys/socket.h>
+*/
+import "C"
+
+const (
+	sysIPV6_ADDRFORM       = C.IPV6_ADDRFORM
+	sysIPV6_2292PKTINFO    = C.IPV6_2292PKTINFO
+	sysIPV6_2292HOPOPTS    = C.IPV6_2292HOPOPTS
+	sysIPV6_2292DSTOPTS    = C.IPV6_2292DSTOPTS
+	sysIPV6_2292RTHDR      = C.IPV6_2292RTHDR
+	sysIPV6_2292PKTOPTIONS = C.IPV6_2292PKTOPTIONS
+	sysIPV6_CHECKSUM       = C.IPV6_CHECKSUM
+	sysIPV6_2292HOPLIMIT   = C.IPV6_2292HOPLIMIT
+	sysIPV6_NEXTHOP        = C.IPV6_NEXTHOP
+	sysIPV6_FLOWINFO       = C.IPV6_FLOWINFO
+
+	sysIPV6_UNICAST_HOPS        = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF        = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS      = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP      = C.IPV6_MULTICAST_LOOP
+	sysIPV6_ADD_MEMBERSHIP      = C.IPV6_ADD_MEMBERSHIP
+	sysIPV6_DROP_MEMBERSHIP     = C.IPV6_DROP_MEMBERSHIP
+	sysMCAST_JOIN_GROUP         = C.MCAST_JOIN_GROUP
+	sysMCAST_LEAVE_GROUP        = C.MCAST_LEAVE_GROUP
+	sysMCAST_JOIN_SOURCE_GROUP  = C.MCAST_JOIN_SOURCE_GROUP
+	sysMCAST_LEAVE_SOURCE_GROUP = C.MCAST_LEAVE_SOURCE_GROUP
+	sysMCAST_BLOCK_SOURCE       = C.MCAST_BLOCK_SOURCE
+	sysMCAST_UNBLOCK_SOURCE     = C.MCAST_UNBLOCK_SOURCE
+	sysMCAST_MSFILTER           = C.MCAST_MSFILTER
+	sysIPV6_ROUTER_ALERT        = C.IPV6_ROUTER_ALERT
+	sysIPV6_MTU_DISCOVER        = C.IPV6_MTU_DISCOVER
+	sysIPV6_MTU                 = C.IPV6_MTU
+	sysIPV6_RECVERR             = C.IPV6_RECVERR
+	sysIPV6_V6ONLY              = C.IPV6_V6ONLY
+	sysIPV6_JOIN_ANYCAST        = C.IPV6_JOIN_ANYCAST
+	sysIPV6_LEAVE_ANYCAST       = C.IPV6_LEAVE_ANYCAST
+
+	//sysIPV6_PMTUDISC_DONT      = C.IPV6_PMTUDISC_DONT
+	//sysIPV6_PMTUDISC_WANT      = C.IPV6_PMTUDISC_WANT
+	//sysIPV6_PMTUDISC_DO        = C.IPV6_PMTUDISC_DO
+	//sysIPV6_PMTUDISC_PROBE     = C.IPV6_PMTUDISC_PROBE
+	//sysIPV6_PMTUDISC_INTERFACE = C.IPV6_PMTUDISC_INTERFACE
+	//sysIPV6_PMTUDISC_OMIT      = C.IPV6_PMTUDISC_OMIT
+
+	sysIPV6_FLOWLABEL_MGR = C.IPV6_FLOWLABEL_MGR
+	sysIPV6_FLOWINFO_SEND = C.IPV6_FLOWINFO_SEND
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+	sysIPV6_XFRM_POLICY  = C.IPV6_XFRM_POLICY
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_PKTINFO      = C.IPV6_PKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_HOPLIMIT     = C.IPV6_HOPLIMIT
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_HOPOPTS      = C.IPV6_HOPOPTS
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RTHDR        = C.IPV6_RTHDR
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+	sysIPV6_DSTOPTS      = C.IPV6_DSTOPTS
+	sysIPV6_RECVPATHMTU  = C.IPV6_RECVPATHMTU
+	sysIPV6_PATHMTU      = C.IPV6_PATHMTU
+	sysIPV6_DONTFRAG     = C.IPV6_DONTFRAG
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+	sysIPV6_TCLASS     = C.IPV6_TCLASS
+
+	sysIPV6_ADDR_PREFERENCES = C.IPV6_ADDR_PREFERENCES
+
+	sysIPV6_PREFER_SRC_TMP            = C.IPV6_PREFER_SRC_TMP
+	sysIPV6_PREFER_SRC_PUBLIC         = C.IPV6_PREFER_SRC_PUBLIC
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = C.IPV6_PREFER_SRC_PUBTMP_DEFAULT
+	sysIPV6_PREFER_SRC_COA            = C.IPV6_PREFER_SRC_COA
+	sysIPV6_PREFER_SRC_HOME           = C.IPV6_PREFER_SRC_HOME
+	sysIPV6_PREFER_SRC_CGA            = C.IPV6_PREFER_SRC_CGA
+	sysIPV6_PREFER_SRC_NONCGA         = C.IPV6_PREFER_SRC_NONCGA
+
+	sysIPV6_MINHOPCOUNT = C.IPV6_MINHOPCOUNT
+
+	sysIPV6_ORIGDSTADDR     = C.IPV6_ORIGDSTADDR
+	sysIPV6_RECVORIGDSTADDR = C.IPV6_RECVORIGDSTADDR
+	sysIPV6_TRANSPARENT     = C.IPV6_TRANSPARENT
+	sysIPV6_UNICAST_IF      = C.IPV6_UNICAST_IF
+
+	sysICMPV6_FILTER = C.ICMPV6_FILTER
+
+	sysICMPV6_FILTER_BLOCK       = C.ICMPV6_FILTER_BLOCK
+	sysICMPV6_FILTER_PASS        = C.ICMPV6_FILTER_PASS
+	sysICMPV6_FILTER_BLOCKOTHERS = C.ICMPV6_FILTER_BLOCKOTHERS
+	sysICMPV6_FILTER_PASSONLY    = C.ICMPV6_FILTER_PASSONLY
+
+	sysSOL_SOCKET       = C.SOL_SOCKET
+	sysSO_ATTACH_FILTER = C.SO_ATTACH_FILTER
+
+	sysSizeofKernelSockaddrStorage = C.sizeof_struct___kernel_sockaddr_storage
+	sysSizeofSockaddrInet6         = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo          = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo           = C.sizeof_struct_ip6_mtuinfo
+	sysSizeofIPv6FlowlabelReq      = C.sizeof_struct_in6_flowlabel_req
+
+	sysSizeofIPv6Mreq       = C.sizeof_struct_ipv6_mreq
+	sysSizeofGroupReq       = C.sizeof_struct_group_req
+	sysSizeofGroupSourceReq = C.sizeof_struct_group_source_req
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysKernelSockaddrStorage C.struct___kernel_sockaddr_storage
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6FlowlabelReq C.struct_in6_flowlabel_req
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysGroupReq C.struct_group_req
+
+type sysGroupSourceReq C.struct_group_source_req
+
+type sysICMPv6Filter C.struct_icmp6_filter
+
+type sysSockFProg C.struct_sock_fprog
+
+type sysSockFilter C.struct_sock_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_netbsd.go b/vendor/golang.org/x/net/ipv6/defs_netbsd.go
new file mode 100644
index 000000000..7bd09e8e8
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_netbsd.go
@@ -0,0 +1,80 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_IPSEC_POLICY = C.IPV6_IPSEC_POLICY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+	sysIPV6_PATHMTU     = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_RECVTCLASS = C.IPV6_RECVTCLASS
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sysSizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sysSizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysICMPv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_openbsd.go b/vendor/golang.org/x/net/ipv6/defs_openbsd.go
new file mode 100644
index 000000000..6796d9b2f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_openbsd.go
@@ -0,0 +1,89 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <sys/param.h>
+#include <sys/socket.h>
+
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+	sysIPV6_PORTRANGE      = C.IPV6_PORTRANGE
+	sysICMP6_FILTER        = C.ICMP6_FILTER
+
+	sysIPV6_CHECKSUM = C.IPV6_CHECKSUM
+	sysIPV6_V6ONLY   = C.IPV6_V6ONLY
+
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVRTHDR    = C.IPV6_RECVRTHDR
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+	sysIPV6_RECVDSTOPTS  = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_USE_MIN_MTU = C.IPV6_USE_MIN_MTU
+	sysIPV6_RECVPATHMTU = C.IPV6_RECVPATHMTU
+
+	sysIPV6_PATHMTU = C.IPV6_PATHMTU
+
+	sysIPV6_PKTINFO  = C.IPV6_PKTINFO
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+	sysIPV6_RTHDR    = C.IPV6_RTHDR
+
+	sysIPV6_AUTH_LEVEL        = C.IPV6_AUTH_LEVEL
+	sysIPV6_ESP_TRANS_LEVEL   = C.IPV6_ESP_TRANS_LEVEL
+	sysIPV6_ESP_NETWORK_LEVEL = C.IPV6_ESP_NETWORK_LEVEL
+	sysIPSEC6_OUTSA           = C.IPSEC6_OUTSA
+	sysIPV6_RECVTCLASS        = C.IPV6_RECVTCLASS
+
+	sysIPV6_AUTOFLOWLABEL = C.IPV6_AUTOFLOWLABEL
+	sysIPV6_IPCOMP_LEVEL  = C.IPV6_IPCOMP_LEVEL
+
+	sysIPV6_TCLASS   = C.IPV6_TCLASS
+	sysIPV6_DONTFRAG = C.IPV6_DONTFRAG
+	sysIPV6_PIPEX    = C.IPV6_PIPEX
+
+	sysIPV6_RTABLE = C.IPV6_RTABLE
+
+	sysIPV6_PORTRANGE_DEFAULT = C.IPV6_PORTRANGE_DEFAULT
+	sysIPV6_PORTRANGE_HIGH    = C.IPV6_PORTRANGE_HIGH
+	sysIPV6_PORTRANGE_LOW     = C.IPV6_PORTRANGE_LOW
+
+	sysSizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sysSizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysICMPv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/defs_solaris.go b/vendor/golang.org/x/net/ipv6/defs_solaris.go
new file mode 100644
index 000000000..972b17126
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/defs_solaris.go
@@ -0,0 +1,96 @@
+// 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 ignore
+
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+
+package ipv6
+
+/*
+#include <netinet/in.h>
+#include <netinet/icmp6.h>
+*/
+import "C"
+
+const (
+	sysIPV6_UNICAST_HOPS   = C.IPV6_UNICAST_HOPS
+	sysIPV6_MULTICAST_IF   = C.IPV6_MULTICAST_IF
+	sysIPV6_MULTICAST_HOPS = C.IPV6_MULTICAST_HOPS
+	sysIPV6_MULTICAST_LOOP = C.IPV6_MULTICAST_LOOP
+	sysIPV6_JOIN_GROUP     = C.IPV6_JOIN_GROUP
+	sysIPV6_LEAVE_GROUP    = C.IPV6_LEAVE_GROUP
+
+	sysIPV6_PKTINFO = C.IPV6_PKTINFO
+
+	sysIPV6_HOPLIMIT = C.IPV6_HOPLIMIT
+	sysIPV6_NEXTHOP  = C.IPV6_NEXTHOP
+	sysIPV6_HOPOPTS  = C.IPV6_HOPOPTS
+	sysIPV6_DSTOPTS  = C.IPV6_DSTOPTS
+
+	sysIPV6_RTHDR        = C.IPV6_RTHDR
+	sysIPV6_RTHDRDSTOPTS = C.IPV6_RTHDRDSTOPTS
+
+	sysIPV6_RECVPKTINFO  = C.IPV6_RECVPKTINFO
+	sysIPV6_RECVHOPLIMIT = C.IPV6_RECVHOPLIMIT
+	sysIPV6_RECVHOPOPTS  = C.IPV6_RECVHOPOPTS
+
+	sysIPV6_RECVRTHDR = C.IPV6_RECVRTHDR
+
+	sysIPV6_RECVRTHDRDSTOPTS = C.IPV6_RECVRTHDRDSTOPTS
+
+	sysIPV6_CHECKSUM        = C.IPV6_CHECKSUM
+	sysIPV6_RECVTCLASS      = C.IPV6_RECVTCLASS
+	sysIPV6_USE_MIN_MTU     = C.IPV6_USE_MIN_MTU
+	sysIPV6_DONTFRAG        = C.IPV6_DONTFRAG
+	sysIPV6_SEC_OPT         = C.IPV6_SEC_OPT
+	sysIPV6_SRC_PREFERENCES = C.IPV6_SRC_PREFERENCES
+	sysIPV6_RECVPATHMTU     = C.IPV6_RECVPATHMTU
+	sysIPV6_PATHMTU         = C.IPV6_PATHMTU
+	sysIPV6_TCLASS          = C.IPV6_TCLASS
+	sysIPV6_V6ONLY          = C.IPV6_V6ONLY
+
+	sysIPV6_RECVDSTOPTS = C.IPV6_RECVDSTOPTS
+
+	sysIPV6_PREFER_SRC_HOME   = C.IPV6_PREFER_SRC_HOME
+	sysIPV6_PREFER_SRC_COA    = C.IPV6_PREFER_SRC_COA
+	sysIPV6_PREFER_SRC_PUBLIC = C.IPV6_PREFER_SRC_PUBLIC
+	sysIPV6_PREFER_SRC_TMP    = C.IPV6_PREFER_SRC_TMP
+	sysIPV6_PREFER_SRC_NONCGA = C.IPV6_PREFER_SRC_NONCGA
+	sysIPV6_PREFER_SRC_CGA    = C.IPV6_PREFER_SRC_CGA
+
+	sysIPV6_PREFER_SRC_MIPMASK    = C.IPV6_PREFER_SRC_MIPMASK
+	sysIPV6_PREFER_SRC_MIPDEFAULT = C.IPV6_PREFER_SRC_MIPDEFAULT
+	sysIPV6_PREFER_SRC_TMPMASK    = C.IPV6_PREFER_SRC_TMPMASK
+	sysIPV6_PREFER_SRC_TMPDEFAULT = C.IPV6_PREFER_SRC_TMPDEFAULT
+	sysIPV6_PREFER_SRC_CGAMASK    = C.IPV6_PREFER_SRC_CGAMASK
+	sysIPV6_PREFER_SRC_CGADEFAULT = C.IPV6_PREFER_SRC_CGADEFAULT
+
+	sysIPV6_PREFER_SRC_MASK = C.IPV6_PREFER_SRC_MASK
+
+	sysIPV6_PREFER_SRC_DEFAULT = C.IPV6_PREFER_SRC_DEFAULT
+
+	sysIPV6_BOUND_IF   = C.IPV6_BOUND_IF
+	sysIPV6_UNSPEC_SRC = C.IPV6_UNSPEC_SRC
+
+	sysICMP6_FILTER = C.ICMP6_FILTER
+
+	sysSizeofSockaddrInet6 = C.sizeof_struct_sockaddr_in6
+	sysSizeofInet6Pktinfo  = C.sizeof_struct_in6_pktinfo
+	sysSizeofIPv6Mtuinfo   = C.sizeof_struct_ip6_mtuinfo
+
+	sysSizeofIPv6Mreq = C.sizeof_struct_ipv6_mreq
+
+	sysSizeofICMPv6Filter = C.sizeof_struct_icmp6_filter
+)
+
+type sysSockaddrInet6 C.struct_sockaddr_in6
+
+type sysInet6Pktinfo C.struct_in6_pktinfo
+
+type sysIPv6Mtuinfo C.struct_ip6_mtuinfo
+
+type sysIPv6Mreq C.struct_ipv6_mreq
+
+type sysICMPv6Filter C.struct_icmp6_filter
diff --git a/vendor/golang.org/x/net/ipv6/dgramopt_posix.go b/vendor/golang.org/x/net/ipv6/dgramopt_posix.go
new file mode 100644
index 000000000..4ea7bc2d6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/dgramopt_posix.go
@@ -0,0 +1,290 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd windows
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/netreflect"
+)
+
+// MulticastHopLimit returns the hop limit field value for outgoing
+// multicast packets.
+func (c *dgramOpt) MulticastHopLimit() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return 0, err
+	}
+	return getInt(s, &sockOpts[ssoMulticastHopLimit])
+}
+
+// SetMulticastHopLimit sets the hop limit field value for future
+// outgoing multicast packets.
+func (c *dgramOpt) SetMulticastHopLimit(hoplim int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	return setInt(s, &sockOpts[ssoMulticastHopLimit], hoplim)
+}
+
+// MulticastInterface returns the default interface for multicast
+// packet transmissions.
+func (c *dgramOpt) MulticastInterface() (*net.Interface, error) {
+	if !c.ok() {
+		return nil, syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return nil, err
+	}
+	return getInterface(s, &sockOpts[ssoMulticastInterface])
+}
+
+// SetMulticastInterface sets the default interface for future
+// multicast packet transmissions.
+func (c *dgramOpt) SetMulticastInterface(ifi *net.Interface) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	return setInterface(s, &sockOpts[ssoMulticastInterface], ifi)
+}
+
+// MulticastLoopback reports whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) MulticastLoopback() (bool, error) {
+	if !c.ok() {
+		return false, syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return false, err
+	}
+	on, err := getInt(s, &sockOpts[ssoMulticastLoopback])
+	if err != nil {
+		return false, err
+	}
+	return on == 1, nil
+}
+
+// SetMulticastLoopback sets whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) SetMulticastLoopback(on bool) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	return setInt(s, &sockOpts[ssoMulticastLoopback], boolint(on))
+}
+
+// JoinGroup joins the group address group on the interface ifi.
+// By default all sources that can cast data to group are accepted.
+// It's possible to mute and unmute data transmission from a specific
+// source by using ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup.
+// JoinGroup uses the system assigned multicast interface when ifi is
+// nil, although this is not recommended because the assignment
+// depends on platforms and sometimes it might require routing
+// configuration.
+func (c *dgramOpt) JoinGroup(ifi *net.Interface, group net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	return setGroup(s, &sockOpts[ssoJoinGroup], ifi, grp)
+}
+
+// LeaveGroup leaves the group address group on the interface ifi
+// regardless of whether the group is any-source group or
+// source-specific group.
+func (c *dgramOpt) LeaveGroup(ifi *net.Interface, group net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	return setGroup(s, &sockOpts[ssoLeaveGroup], ifi, grp)
+}
+
+// JoinSourceSpecificGroup joins the source-specific group comprising
+// group and source on the interface ifi.
+// JoinSourceSpecificGroup uses the system assigned multicast
+// interface when ifi is nil, although this is not recommended because
+// the assignment depends on platforms and sometimes it might require
+// routing configuration.
+func (c *dgramOpt) JoinSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return setSourceGroup(s, &sockOpts[ssoJoinSourceGroup], ifi, grp, src)
+}
+
+// LeaveSourceSpecificGroup leaves the source-specific group on the
+// interface ifi.
+func (c *dgramOpt) LeaveSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return setSourceGroup(s, &sockOpts[ssoLeaveSourceGroup], ifi, grp, src)
+}
+
+// ExcludeSourceSpecificGroup excludes the source-specific group from
+// the already joined any-source groups by JoinGroup on the interface
+// ifi.
+func (c *dgramOpt) ExcludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return setSourceGroup(s, &sockOpts[ssoBlockSourceGroup], ifi, grp, src)
+}
+
+// IncludeSourceSpecificGroup includes the excluded source-specific
+// group by ExcludeSourceSpecificGroup again on the interface ifi.
+func (c *dgramOpt) IncludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	grp := netAddrToIP16(group)
+	if grp == nil {
+		return errMissingAddress
+	}
+	src := netAddrToIP16(source)
+	if src == nil {
+		return errMissingAddress
+	}
+	return setSourceGroup(s, &sockOpts[ssoUnblockSourceGroup], ifi, grp, src)
+}
+
+// Checksum reports whether the kernel will compute, store or verify a
+// checksum for both incoming and outgoing packets.  If on is true, it
+// returns an offset in bytes into the data of where the checksum
+// field is located.
+func (c *dgramOpt) Checksum() (on bool, offset int, err error) {
+	if !c.ok() {
+		return false, 0, syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return false, 0, err
+	}
+	offset, err = getInt(s, &sockOpts[ssoChecksum])
+	if err != nil {
+		return false, 0, err
+	}
+	if offset < 0 {
+		return false, 0, nil
+	}
+	return true, offset, nil
+}
+
+// SetChecksum enables the kernel checksum processing.  If on is ture,
+// the offset should be an offset in bytes into the data of where the
+// checksum field is located.
+func (c *dgramOpt) SetChecksum(on bool, offset int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	if !on {
+		offset = -1
+	}
+	return setInt(s, &sockOpts[ssoChecksum], offset)
+}
+
+// ICMPFilter returns an ICMP filter.
+func (c *dgramOpt) ICMPFilter() (*ICMPFilter, error) {
+	if !c.ok() {
+		return nil, syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return nil, err
+	}
+	return getICMPFilter(s, &sockOpts[ssoICMPFilter])
+}
+
+// SetICMPFilter deploys the ICMP filter.
+func (c *dgramOpt) SetICMPFilter(f *ICMPFilter) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.PacketConn)
+	if err != nil {
+		return err
+	}
+	return setICMPFilter(s, &sockOpts[ssoICMPFilter], f)
+}
diff --git a/vendor/golang.org/x/net/ipv6/dgramopt_stub.go b/vendor/golang.org/x/net/ipv6/dgramopt_stub.go
new file mode 100644
index 000000000..fb067fb2f
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/dgramopt_stub.go
@@ -0,0 +1,119 @@
+// 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.
+
+// +build nacl plan9 solaris
+
+package ipv6
+
+import "net"
+
+// MulticastHopLimit returns the hop limit field value for outgoing
+// multicast packets.
+func (c *dgramOpt) MulticastHopLimit() (int, error) {
+	return 0, errOpNoSupport
+}
+
+// SetMulticastHopLimit sets the hop limit field value for future
+// outgoing multicast packets.
+func (c *dgramOpt) SetMulticastHopLimit(hoplim int) error {
+	return errOpNoSupport
+}
+
+// MulticastInterface returns the default interface for multicast
+// packet transmissions.
+func (c *dgramOpt) MulticastInterface() (*net.Interface, error) {
+	return nil, errOpNoSupport
+}
+
+// SetMulticastInterface sets the default interface for future
+// multicast packet transmissions.
+func (c *dgramOpt) SetMulticastInterface(ifi *net.Interface) error {
+	return errOpNoSupport
+}
+
+// MulticastLoopback reports whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) MulticastLoopback() (bool, error) {
+	return false, errOpNoSupport
+}
+
+// SetMulticastLoopback sets whether transmitted multicast packets
+// should be copied and send back to the originator.
+func (c *dgramOpt) SetMulticastLoopback(on bool) error {
+	return errOpNoSupport
+}
+
+// JoinGroup joins the group address group on the interface ifi.
+// By default all sources that can cast data to group are accepted.
+// It's possible to mute and unmute data transmission from a specific
+// source by using ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup.
+// JoinGroup uses the system assigned multicast interface when ifi is
+// nil, although this is not recommended because the assignment
+// depends on platforms and sometimes it might require routing
+// configuration.
+func (c *dgramOpt) JoinGroup(ifi *net.Interface, group net.Addr) error {
+	return errOpNoSupport
+}
+
+// LeaveGroup leaves the group address group on the interface ifi
+// regardless of whether the group is any-source group or
+// source-specific group.
+func (c *dgramOpt) LeaveGroup(ifi *net.Interface, group net.Addr) error {
+	return errOpNoSupport
+}
+
+// JoinSourceSpecificGroup joins the source-specific group comprising
+// group and source on the interface ifi.
+// JoinSourceSpecificGroup uses the system assigned multicast
+// interface when ifi is nil, although this is not recommended because
+// the assignment depends on platforms and sometimes it might require
+// routing configuration.
+func (c *dgramOpt) JoinSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	return errOpNoSupport
+}
+
+// LeaveSourceSpecificGroup leaves the source-specific group on the
+// interface ifi.
+func (c *dgramOpt) LeaveSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	return errOpNoSupport
+}
+
+// ExcludeSourceSpecificGroup excludes the source-specific group from
+// the already joined any-source groups by JoinGroup on the interface
+// ifi.
+func (c *dgramOpt) ExcludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	return errOpNoSupport
+}
+
+// IncludeSourceSpecificGroup includes the excluded source-specific
+// group by ExcludeSourceSpecificGroup again on the interface ifi.
+func (c *dgramOpt) IncludeSourceSpecificGroup(ifi *net.Interface, group, source net.Addr) error {
+	return errOpNoSupport
+}
+
+// Checksum reports whether the kernel will compute, store or verify a
+// checksum for both incoming and outgoing packets.  If on is true, it
+// returns an offset in bytes into the data of where the checksum
+// field is located.
+func (c *dgramOpt) Checksum() (on bool, offset int, err error) {
+	return false, 0, errOpNoSupport
+}
+
+// SetChecksum enables the kernel checksum processing.  If on is ture,
+// the offset should be an offset in bytes into the data of where the
+// checksum field is located.
+func (c *dgramOpt) SetChecksum(on bool, offset int) error {
+	return errOpNoSupport
+}
+
+// ICMPFilter returns an ICMP filter.
+func (c *dgramOpt) ICMPFilter() (*ICMPFilter, error) {
+	return nil, errOpNoSupport
+}
+
+// SetICMPFilter deploys the ICMP filter.
+func (c *dgramOpt) SetICMPFilter(f *ICMPFilter) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/doc.go b/vendor/golang.org/x/net/ipv6/doc.go
new file mode 100644
index 000000000..7d75698fb
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/doc.go
@@ -0,0 +1,240 @@
+// 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 implements IP-level socket options for the Internet
+// Protocol version 6.
+//
+// The package provides IP-level socket options that allow
+// manipulation of IPv6 facilities.
+//
+// The IPv6 protocol is defined in RFC 2460.
+// Basic and advanced socket interface extensions are defined in RFC
+// 3493 and RFC 3542.
+// Socket interface extensions for multicast source filters are
+// defined in RFC 3678.
+// MLDv1 and MLDv2 are defined in RFC 2710 and RFC 3810.
+// Source-specific multicast is defined in RFC 4607.
+//
+//
+// Unicasting
+//
+// The options for unicasting are available for net.TCPConn,
+// net.UDPConn and net.IPConn which are created as network connections
+// that use the IPv6 transport.  When a single TCP connection carrying
+// a data flow of multiple packets needs to indicate the flow is
+// important, ipv6.Conn is used to set the traffic class field on the
+// IPv6 header for each packet.
+//
+//	ln, err := net.Listen("tcp6", "[::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer ln.Close()
+//	for {
+//		c, err := ln.Accept()
+//		if err != nil {
+//			// error handling
+//		}
+//		go func(c net.Conn) {
+//			defer c.Close()
+//
+// The outgoing packets will be labeled DiffServ assured forwarding
+// class 1 low drop precedence, known as AF11 packets.
+//
+//			if err := ipv6.NewConn(c).SetTrafficClass(0x28); err != nil {
+//				// error handling
+//			}
+//			if _, err := c.Write(data); err != nil {
+//				// error handling
+//			}
+//		}(c)
+//	}
+//
+//
+// Multicasting
+//
+// The options for multicasting are available for net.UDPConn and
+// net.IPconn which are created as network connections that use the
+// IPv6 transport.  A few network facilities must be prepared before
+// you begin multicasting, at a minimum joining network interfaces and
+// multicast groups.
+//
+//	en0, err := net.InterfaceByName("en0")
+//	if err != nil {
+//		// error handling
+//	}
+//	en1, err := net.InterfaceByIndex(911)
+//	if err != nil {
+//		// error handling
+//	}
+//	group := net.ParseIP("ff02::114")
+//
+// First, an application listens to an appropriate address with an
+// appropriate service port.
+//
+//	c, err := net.ListenPacket("udp6", "[::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c.Close()
+//
+// Second, the application joins multicast groups, starts listening to
+// the groups on the specified network interfaces.  Note that the
+// service port for transport layer protocol does not matter with this
+// operation as joining groups affects only network and link layer
+// protocols, such as IPv6 and Ethernet.
+//
+//	p := ipv6.NewPacketConn(c)
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: group}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en1, &net.UDPAddr{IP: group}); err != nil {
+//		// error handling
+//	}
+//
+// The application might set per packet control message transmissions
+// between the protocol stack within the kernel.  When the application
+// needs a destination address on an incoming packet,
+// SetControlMessage of ipv6.PacketConn is used to enable control
+// message transmissions.
+//
+//	if err := p.SetControlMessage(ipv6.FlagDst, true); err != nil {
+//		// error handling
+//	}
+//
+// The application could identify whether the received packets are
+// of interest by using the control message that contains the
+// destination address of the received packet.
+//
+//	b := make([]byte, 1500)
+//	for {
+//		n, rcm, src, err := p.ReadFrom(b)
+//		if err != nil {
+//			// error handling
+//		}
+//		if rcm.Dst.IsMulticast() {
+//			if rcm.Dst.Equal(group) {
+//				// joined group, do something
+//			} else {
+//				// unknown group, discard
+//				continue
+//			}
+//		}
+//
+// The application can also send both unicast and multicast packets.
+//
+//		p.SetTrafficClass(0x0)
+//		p.SetHopLimit(16)
+//		if _, err := p.WriteTo(data[:n], nil, src); err != nil {
+//			// error handling
+//		}
+//		dst := &net.UDPAddr{IP: group, Port: 1024}
+//		wcm := ipv6.ControlMessage{TrafficClass: 0xe0, HopLimit: 1}
+//		for _, ifi := range []*net.Interface{en0, en1} {
+//			wcm.IfIndex = ifi.Index
+//			if _, err := p.WriteTo(data[:n], &wcm, dst); err != nil {
+//				// error handling
+//			}
+//		}
+//	}
+//
+//
+// More multicasting
+//
+// An application that uses PacketConn may join multiple multicast
+// groups.  For example, a UDP listener with port 1024 might join two
+// different groups across over two different network interfaces by
+// using:
+//
+//	c, err := net.ListenPacket("udp6", "[::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c.Close()
+//	p := ipv6.NewPacketConn(c)
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::1:114")}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::2:114")}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en1, &net.UDPAddr{IP: net.ParseIP("ff02::2:114")}); err != nil {
+//		// error handling
+//	}
+//
+// It is possible for multiple UDP listeners that listen on the same
+// UDP port to join the same multicast group.  The net package will
+// provide a socket that listens to a wildcard address with reusable
+// UDP port when an appropriate multicast address prefix is passed to
+// the net.ListenPacket or net.ListenUDP.
+//
+//	c1, err := net.ListenPacket("udp6", "[ff02::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c1.Close()
+//	c2, err := net.ListenPacket("udp6", "[ff02::]:1024")
+//	if err != nil {
+//		// error handling
+//	}
+//	defer c2.Close()
+//	p1 := ipv6.NewPacketConn(c1)
+//	if err := p1.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::114")}); err != nil {
+//		// error handling
+//	}
+//	p2 := ipv6.NewPacketConn(c2)
+//	if err := p2.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::114")}); err != nil {
+//		// error handling
+//	}
+//
+// Also it is possible for the application to leave or rejoin a
+// multicast group on the network interface.
+//
+//	if err := p.LeaveGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff02::114")}); err != nil {
+//		// error handling
+//	}
+//	if err := p.JoinGroup(en0, &net.UDPAddr{IP: net.ParseIP("ff01::114")}); err != nil {
+//		// error handling
+//	}
+//
+//
+// Source-specific multicasting
+//
+// An application that uses PacketConn on MLDv2 supported platform is
+// able to join source-specific multicast groups.
+// The application may use JoinSourceSpecificGroup and
+// LeaveSourceSpecificGroup for the operation known as "include" mode,
+//
+//	ssmgroup := net.UDPAddr{IP: net.ParseIP("ff32::8000:9")}
+//	ssmsource := net.UDPAddr{IP: net.ParseIP("fe80::cafe")}
+//	if err := p.JoinSourceSpecificGroup(en0, &ssmgroup, &ssmsource); err != nil {
+//		// error handling
+//	}
+//	if err := p.LeaveSourceSpecificGroup(en0, &ssmgroup, &ssmsource); err != nil {
+//		// error handling
+//	}
+//
+// or JoinGroup, ExcludeSourceSpecificGroup,
+// IncludeSourceSpecificGroup and LeaveGroup for the operation known
+// as "exclude" mode.
+//
+//	exclsource := net.UDPAddr{IP: net.ParseIP("fe80::dead")}
+//	if err := p.JoinGroup(en0, &ssmgroup); err != nil {
+//		// error handling
+//	}
+//	if err := p.ExcludeSourceSpecificGroup(en0, &ssmgroup, &exclsource); err != nil {
+//		// error handling
+//	}
+//	if err := p.LeaveGroup(en0, &ssmgroup); err != nil {
+//		// error handling
+//	}
+//
+// Note that it depends on each platform implementation what happens
+// when an application which runs on MLDv2 unsupported platform uses
+// JoinSourceSpecificGroup and LeaveSourceSpecificGroup.
+// In general the platform tries to fall back to conversations using
+// MLDv1 and starts to listen to multicast traffic.
+// In the fallback case, ExcludeSourceSpecificGroup and
+// IncludeSourceSpecificGroup may return an error.
+package ipv6 // import "golang.org/x/net/ipv6"
diff --git a/vendor/golang.org/x/net/ipv6/endpoint.go b/vendor/golang.org/x/net/ipv6/endpoint.go
new file mode 100644
index 000000000..60e7d93c2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/endpoint.go
@@ -0,0 +1,125 @@
+// 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"
+	"syscall"
+	"time"
+
+	"golang.org/x/net/internal/netreflect"
+)
+
+// A Conn represents a network endpoint that uses IPv6 transport.
+// It allows to set basic IP-level socket options such as traffic
+// class and hop limit.
+type Conn struct {
+	genericOpt
+}
+
+type genericOpt struct {
+	net.Conn
+}
+
+func (c *genericOpt) ok() bool { return c != nil && c.Conn != nil }
+
+// PathMTU returns a path MTU value for the destination associated
+// with the endpoint.
+func (c *Conn) PathMTU() (int, error) {
+	if !c.genericOpt.ok() {
+		return 0, syscall.EINVAL
+	}
+	s, err := netreflect.SocketOf(c.genericOpt.Conn)
+	if err != nil {
+		return 0, err
+	}
+	_, mtu, err := getMTUInfo(s, &sockOpts[ssoPathMTU])
+	if err != nil {
+		return 0, err
+	}
+	return mtu, nil
+}
+
+// NewConn returns a new Conn.
+func NewConn(c net.Conn) *Conn {
+	return &Conn{
+		genericOpt: genericOpt{Conn: c},
+	}
+}
+
+// A PacketConn represents a packet network endpoint that uses IPv6
+// transport.  It is used to control several IP-level socket options
+// including IPv6 header manipulation.  It also provides datagram
+// based network I/O methods specific to the IPv6 and higher layer
+// protocols such as OSPF, GRE, and UDP.
+type PacketConn struct {
+	genericOpt
+	dgramOpt
+	payloadHandler
+}
+
+type dgramOpt struct {
+	net.PacketConn
+}
+
+func (c *dgramOpt) ok() bool { return c != nil && c.PacketConn != nil }
+
+// SetControlMessage allows to receive the per packet basis IP-level
+// socket options.
+func (c *PacketConn) SetControlMessage(cf ControlFlags, on bool) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.PacketSocketOf(c.dgramOpt.PacketConn)
+	if err != nil {
+		return err
+	}
+	return setControlMessage(s, &c.payloadHandler.rawOpt, cf, on)
+}
+
+// SetDeadline sets the read and write deadlines associated with the
+// endpoint.
+func (c *PacketConn) SetDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.SetDeadline(t)
+}
+
+// SetReadDeadline sets the read deadline associated with the
+// endpoint.
+func (c *PacketConn) SetReadDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.SetReadDeadline(t)
+}
+
+// SetWriteDeadline sets the write deadline associated with the
+// endpoint.
+func (c *PacketConn) SetWriteDeadline(t time.Time) error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.SetWriteDeadline(t)
+}
+
+// Close closes the endpoint.
+func (c *PacketConn) Close() error {
+	if !c.payloadHandler.ok() {
+		return syscall.EINVAL
+	}
+	return c.payloadHandler.Close()
+}
+
+// NewPacketConn returns a new PacketConn using c as its underlying
+// transport.
+func NewPacketConn(c net.PacketConn) *PacketConn {
+	return &PacketConn{
+		genericOpt:     genericOpt{Conn: c.(net.Conn)},
+		dgramOpt:       dgramOpt{PacketConn: c},
+		payloadHandler: payloadHandler{PacketConn: c},
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/example_test.go b/vendor/golang.org/x/net/ipv6/example_test.go
new file mode 100644
index 000000000..e761aa2a1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/example_test.go
@@ -0,0 +1,216 @@
+// 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.
+
+package ipv6_test
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"time"
+
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/ipv6"
+)
+
+func ExampleConn_markingTCP() {
+	ln, err := net.Listen("tcp", "[::]:1024")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer ln.Close()
+
+	for {
+		c, err := ln.Accept()
+		if err != nil {
+			log.Fatal(err)
+		}
+		go func(c net.Conn) {
+			defer c.Close()
+			if c.RemoteAddr().(*net.TCPAddr).IP.To16() != nil && c.RemoteAddr().(*net.TCPAddr).IP.To4() == nil {
+				p := ipv6.NewConn(c)
+				if err := p.SetTrafficClass(0x28); err != nil { // DSCP AF11
+					log.Fatal(err)
+				}
+				if err := p.SetHopLimit(128); err != nil {
+					log.Fatal(err)
+				}
+			}
+			if _, err := c.Write([]byte("HELLO-R-U-THERE-ACK")); err != nil {
+				log.Fatal(err)
+			}
+		}(c)
+	}
+}
+
+func ExamplePacketConn_servingOneShotMulticastDNS() {
+	c, err := net.ListenPacket("udp6", "[::]:5353") // mDNS over UDP
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv6.NewPacketConn(c)
+
+	en0, err := net.InterfaceByName("en0")
+	if err != nil {
+		log.Fatal(err)
+	}
+	mDNSLinkLocal := net.UDPAddr{IP: net.ParseIP("ff02::fb")}
+	if err := p.JoinGroup(en0, &mDNSLinkLocal); err != nil {
+		log.Fatal(err)
+	}
+	defer p.LeaveGroup(en0, &mDNSLinkLocal)
+	if err := p.SetControlMessage(ipv6.FlagDst|ipv6.FlagInterface, true); err != nil {
+		log.Fatal(err)
+	}
+
+	var wcm ipv6.ControlMessage
+	b := make([]byte, 1500)
+	for {
+		_, rcm, peer, err := p.ReadFrom(b)
+		if err != nil {
+			log.Fatal(err)
+		}
+		if !rcm.Dst.IsMulticast() || !rcm.Dst.Equal(mDNSLinkLocal.IP) {
+			continue
+		}
+		wcm.IfIndex = rcm.IfIndex
+		answers := []byte("FAKE-MDNS-ANSWERS") // fake mDNS answers, you need to implement this
+		if _, err := p.WriteTo(answers, &wcm, peer); err != nil {
+			log.Fatal(err)
+		}
+	}
+}
+
+func ExamplePacketConn_tracingIPPacketRoute() {
+	// Tracing an IP packet route to www.google.com.
+
+	const host = "www.google.com"
+	ips, err := net.LookupIP(host)
+	if err != nil {
+		log.Fatal(err)
+	}
+	var dst net.IPAddr
+	for _, ip := range ips {
+		if ip.To16() != nil && ip.To4() == nil {
+			dst.IP = ip
+			fmt.Printf("using %v for tracing an IP packet route to %s\n", dst.IP, host)
+			break
+		}
+	}
+	if dst.IP == nil {
+		log.Fatal("no AAAA record found")
+	}
+
+	c, err := net.ListenPacket("ip6:58", "::") // ICMP for IPv6
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv6.NewPacketConn(c)
+
+	if err := p.SetControlMessage(ipv6.FlagHopLimit|ipv6.FlagSrc|ipv6.FlagDst|ipv6.FlagInterface, true); err != nil {
+		log.Fatal(err)
+	}
+	wm := icmp.Message{
+		Type: ipv6.ICMPTypeEchoRequest, Code: 0,
+		Body: &icmp.Echo{
+			ID:   os.Getpid() & 0xffff,
+			Data: []byte("HELLO-R-U-THERE"),
+		},
+	}
+	var f ipv6.ICMPFilter
+	f.SetAll(true)
+	f.Accept(ipv6.ICMPTypeTimeExceeded)
+	f.Accept(ipv6.ICMPTypeEchoReply)
+	if err := p.SetICMPFilter(&f); err != nil {
+		log.Fatal(err)
+	}
+
+	var wcm ipv6.ControlMessage
+	rb := make([]byte, 1500)
+	for i := 1; i <= 64; i++ { // up to 64 hops
+		wm.Body.(*icmp.Echo).Seq = i
+		wb, err := wm.Marshal(nil)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		// In the real world usually there are several
+		// multiple traffic-engineered paths for each hop.
+		// You may need to probe a few times to each hop.
+		begin := time.Now()
+		wcm.HopLimit = i
+		if _, err := p.WriteTo(wb, &wcm, &dst); err != nil {
+			log.Fatal(err)
+		}
+		if err := p.SetReadDeadline(time.Now().Add(3 * time.Second)); err != nil {
+			log.Fatal(err)
+		}
+		n, rcm, peer, err := p.ReadFrom(rb)
+		if err != nil {
+			if err, ok := err.(net.Error); ok && err.Timeout() {
+				fmt.Printf("%v\t*\n", i)
+				continue
+			}
+			log.Fatal(err)
+		}
+		rm, err := icmp.ParseMessage(58, rb[:n])
+		if err != nil {
+			log.Fatal(err)
+		}
+		rtt := time.Since(begin)
+
+		// In the real world you need to determine whether the
+		// received message is yours using ControlMessage.Src,
+		// ControlMesage.Dst, icmp.Echo.ID and icmp.Echo.Seq.
+		switch rm.Type {
+		case ipv6.ICMPTypeTimeExceeded:
+			names, _ := net.LookupAddr(peer.String())
+			fmt.Printf("%d\t%v %+v %v\n\t%+v\n", i, peer, names, rtt, rcm)
+		case ipv6.ICMPTypeEchoReply:
+			names, _ := net.LookupAddr(peer.String())
+			fmt.Printf("%d\t%v %+v %v\n\t%+v\n", i, peer, names, rtt, rcm)
+			return
+		}
+	}
+}
+
+func ExamplePacketConn_advertisingOSPFHello() {
+	c, err := net.ListenPacket("ip6:89", "::") // OSPF for IPv6
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv6.NewPacketConn(c)
+
+	en0, err := net.InterfaceByName("en0")
+	if err != nil {
+		log.Fatal(err)
+	}
+	allSPFRouters := net.IPAddr{IP: net.ParseIP("ff02::5")}
+	if err := p.JoinGroup(en0, &allSPFRouters); err != nil {
+		log.Fatal(err)
+	}
+	defer p.LeaveGroup(en0, &allSPFRouters)
+
+	hello := make([]byte, 24) // fake hello data, you need to implement this
+	ospf := make([]byte, 16)  // fake ospf header, you need to implement this
+	ospf[0] = 3               // version 3
+	ospf[1] = 1               // hello packet
+	ospf = append(ospf, hello...)
+	if err := p.SetChecksum(true, 12); err != nil {
+		log.Fatal(err)
+	}
+
+	cm := ipv6.ControlMessage{
+		TrafficClass: 0xc0, // DSCP CS6
+		HopLimit:     1,
+		IfIndex:      en0.Index,
+	}
+	if _, err := p.WriteTo(ospf, &cm, &allSPFRouters); err != nil {
+		log.Fatal(err)
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/gen.go b/vendor/golang.org/x/net/ipv6/gen.go
new file mode 100644
index 000000000..826e3ae28
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/gen.go
@@ -0,0 +1,208 @@
+// 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.
+
+// +build ignore
+
+//go:generate go run gen.go
+
+// This program generates system adaptation constants and types,
+// internet protocol constants and tables by reading template files
+// and IANA protocol registries.
+package main
+
+import (
+	"bytes"
+	"encoding/xml"
+	"fmt"
+	"go/format"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"os/exec"
+	"runtime"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	if err := genzsys(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+	if err := geniana(); err != nil {
+		fmt.Fprintln(os.Stderr, err)
+		os.Exit(1)
+	}
+}
+
+func genzsys() error {
+	defs := "defs_" + runtime.GOOS + ".go"
+	f, err := os.Open(defs)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return nil
+		}
+		return err
+	}
+	f.Close()
+	cmd := exec.Command("go", "tool", "cgo", "-godefs", defs)
+	b, err := cmd.Output()
+	if err != nil {
+		return err
+	}
+	// The ipv6 package still supports go1.2, and so we need to
+	// take care of additional platforms in go1.3 and above for
+	// working with go1.2.
+	switch {
+	case runtime.GOOS == "dragonfly" || runtime.GOOS == "solaris":
+		b = bytes.Replace(b, []byte("package ipv6\n"), []byte("// +build "+runtime.GOOS+"\n\npackage ipv6\n"), 1)
+	case runtime.GOOS == "linux" && (runtime.GOARCH == "arm64" || runtime.GOARCH == "mips64" || runtime.GOARCH == "mips64le" || runtime.GOARCH == "ppc" || runtime.GOARCH == "ppc64" || runtime.GOARCH == "ppc64le" || runtime.GOARCH == "s390x"):
+		b = bytes.Replace(b, []byte("package ipv6\n"), []byte("// +build "+runtime.GOOS+","+runtime.GOARCH+"\n\npackage ipv6\n"), 1)
+	}
+	b, err = format.Source(b)
+	if err != nil {
+		return err
+	}
+	zsys := "zsys_" + runtime.GOOS + ".go"
+	switch runtime.GOOS {
+	case "freebsd", "linux":
+		zsys = "zsys_" + runtime.GOOS + "_" + runtime.GOARCH + ".go"
+	}
+	if err := ioutil.WriteFile(zsys, b, 0644); err != nil {
+		return err
+	}
+	return nil
+}
+
+var registries = []struct {
+	url   string
+	parse func(io.Writer, io.Reader) error
+}{
+	{
+		"http://www.iana.org/assignments/icmpv6-parameters/icmpv6-parameters.xml",
+		parseICMPv6Parameters,
+	},
+}
+
+func geniana() error {
+	var bb bytes.Buffer
+	fmt.Fprintf(&bb, "// go generate gen.go\n")
+	fmt.Fprintf(&bb, "// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT\n\n")
+	fmt.Fprintf(&bb, "package ipv6\n\n")
+	for _, r := range registries {
+		resp, err := http.Get(r.url)
+		if err != nil {
+			return err
+		}
+		defer resp.Body.Close()
+		if resp.StatusCode != http.StatusOK {
+			return fmt.Errorf("got HTTP status code %v for %v\n", resp.StatusCode, r.url)
+		}
+		if err := r.parse(&bb, resp.Body); err != nil {
+			return err
+		}
+		fmt.Fprintf(&bb, "\n")
+	}
+	b, err := format.Source(bb.Bytes())
+	if err != nil {
+		return err
+	}
+	if err := ioutil.WriteFile("iana.go", b, 0644); err != nil {
+		return err
+	}
+	return nil
+}
+
+func parseICMPv6Parameters(w io.Writer, r io.Reader) error {
+	dec := xml.NewDecoder(r)
+	var icp icmpv6Parameters
+	if err := dec.Decode(&icp); err != nil {
+		return err
+	}
+	prs := icp.escape()
+	fmt.Fprintf(w, "// %s, Updated: %s\n", icp.Title, icp.Updated)
+	fmt.Fprintf(w, "const (\n")
+	for _, pr := range prs {
+		if pr.Name == "" {
+			continue
+		}
+		fmt.Fprintf(w, "ICMPType%s ICMPType = %d", pr.Name, pr.Value)
+		fmt.Fprintf(w, "// %s\n", pr.OrigName)
+	}
+	fmt.Fprintf(w, ")\n\n")
+	fmt.Fprintf(w, "// %s, Updated: %s\n", icp.Title, icp.Updated)
+	fmt.Fprintf(w, "var icmpTypes = map[ICMPType]string{\n")
+	for _, pr := range prs {
+		if pr.Name == "" {
+			continue
+		}
+		fmt.Fprintf(w, "%d: %q,\n", pr.Value, strings.ToLower(pr.OrigName))
+	}
+	fmt.Fprintf(w, "}\n")
+	return nil
+}
+
+type icmpv6Parameters struct {
+	XMLName    xml.Name `xml:"registry"`
+	Title      string   `xml:"title"`
+	Updated    string   `xml:"updated"`
+	Registries []struct {
+		Title   string `xml:"title"`
+		Records []struct {
+			Value string `xml:"value"`
+			Name  string `xml:"name"`
+		} `xml:"record"`
+	} `xml:"registry"`
+}
+
+type canonICMPv6ParamRecord struct {
+	OrigName string
+	Name     string
+	Value    int
+}
+
+func (icp *icmpv6Parameters) escape() []canonICMPv6ParamRecord {
+	id := -1
+	for i, r := range icp.Registries {
+		if strings.Contains(r.Title, "Type") || strings.Contains(r.Title, "type") {
+			id = i
+			break
+		}
+	}
+	if id < 0 {
+		return nil
+	}
+	prs := make([]canonICMPv6ParamRecord, len(icp.Registries[id].Records))
+	sr := strings.NewReplacer(
+		"Messages", "",
+		"Message", "",
+		"ICMP", "",
+		"+", "P",
+		"-", "",
+		"/", "",
+		".", "",
+		" ", "",
+	)
+	for i, pr := range icp.Registries[id].Records {
+		if strings.Contains(pr.Name, "Reserved") ||
+			strings.Contains(pr.Name, "Unassigned") ||
+			strings.Contains(pr.Name, "Deprecated") ||
+			strings.Contains(pr.Name, "Experiment") ||
+			strings.Contains(pr.Name, "experiment") {
+			continue
+		}
+		ss := strings.Split(pr.Name, "\n")
+		if len(ss) > 1 {
+			prs[i].Name = strings.Join(ss, " ")
+		} else {
+			prs[i].Name = ss[0]
+		}
+		s := strings.TrimSpace(prs[i].Name)
+		prs[i].OrigName = s
+		prs[i].Name = sr.Replace(s)
+		prs[i].Value, _ = strconv.Atoi(pr.Value)
+	}
+	return prs
+}
diff --git a/vendor/golang.org/x/net/ipv6/genericopt_posix.go b/vendor/golang.org/x/net/ipv6/genericopt_posix.go
new file mode 100644
index 000000000..513bd8c74
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/genericopt_posix.go
@@ -0,0 +1,64 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd windows
+
+package ipv6
+
+import (
+	"syscall"
+
+	"golang.org/x/net/internal/netreflect"
+)
+
+// TrafficClass returns the traffic class field value for outgoing
+// packets.
+func (c *genericOpt) TrafficClass() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	s, err := netreflect.SocketOf(c.Conn)
+	if err != nil {
+		return 0, err
+	}
+	return getInt(s, &sockOpts[ssoTrafficClass])
+}
+
+// SetTrafficClass sets the traffic class field value for future
+// outgoing packets.
+func (c *genericOpt) SetTrafficClass(tclass int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.SocketOf(c.Conn)
+	if err != nil {
+		return err
+	}
+	return setInt(s, &sockOpts[ssoTrafficClass], tclass)
+}
+
+// HopLimit returns the hop limit field value for outgoing packets.
+func (c *genericOpt) HopLimit() (int, error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	s, err := netreflect.SocketOf(c.Conn)
+	if err != nil {
+		return 0, err
+	}
+	return getInt(s, &sockOpts[ssoHopLimit])
+}
+
+// SetHopLimit sets the hop limit field value for future outgoing
+// packets.
+func (c *genericOpt) SetHopLimit(hoplim int) error {
+	if !c.ok() {
+		return syscall.EINVAL
+	}
+	s, err := netreflect.SocketOf(c.Conn)
+	if err != nil {
+		return err
+	}
+	return setInt(s, &sockOpts[ssoHopLimit], hoplim)
+}
diff --git a/vendor/golang.org/x/net/ipv6/genericopt_stub.go b/vendor/golang.org/x/net/ipv6/genericopt_stub.go
new file mode 100644
index 000000000..f5c372242
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/genericopt_stub.go
@@ -0,0 +1,30 @@
+// 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.
+
+// +build nacl plan9 solaris
+
+package ipv6
+
+// TrafficClass returns the traffic class field value for outgoing
+// packets.
+func (c *genericOpt) TrafficClass() (int, error) {
+	return 0, errOpNoSupport
+}
+
+// SetTrafficClass sets the traffic class field value for future
+// outgoing packets.
+func (c *genericOpt) SetTrafficClass(tclass int) error {
+	return errOpNoSupport
+}
+
+// HopLimit returns the hop limit field value for outgoing packets.
+func (c *genericOpt) HopLimit() (int, error) {
+	return 0, errOpNoSupport
+}
+
+// SetHopLimit sets the hop limit field value for future outgoing
+// packets.
+func (c *genericOpt) SetHopLimit(hoplim int) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/header.go b/vendor/golang.org/x/net/ipv6/header.go
new file mode 100644
index 000000000..e05cb08b2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/header.go
@@ -0,0 +1,55 @@
+// 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.
+
+package ipv6
+
+import (
+	"encoding/binary"
+	"fmt"
+	"net"
+)
+
+const (
+	Version   = 6  // protocol version
+	HeaderLen = 40 // header length
+)
+
+// A Header represents an IPv6 base header.
+type Header struct {
+	Version      int    // protocol version
+	TrafficClass int    // traffic class
+	FlowLabel    int    // flow label
+	PayloadLen   int    // payload length
+	NextHeader   int    // next header
+	HopLimit     int    // hop limit
+	Src          net.IP // source address
+	Dst          net.IP // destination address
+}
+
+func (h *Header) String() string {
+	if h == nil {
+		return "<nil>"
+	}
+	return fmt.Sprintf("ver=%d tclass=%#x flowlbl=%#x payloadlen=%d nxthdr=%d hoplim=%d src=%v dst=%v", h.Version, h.TrafficClass, h.FlowLabel, h.PayloadLen, h.NextHeader, h.HopLimit, h.Src, h.Dst)
+}
+
+// ParseHeader parses b as an IPv6 base header.
+func ParseHeader(b []byte) (*Header, error) {
+	if len(b) < HeaderLen {
+		return nil, errHeaderTooShort
+	}
+	h := &Header{
+		Version:      int(b[0]) >> 4,
+		TrafficClass: int(b[0]&0x0f)<<4 | int(b[1])>>4,
+		FlowLabel:    int(b[1]&0x0f)<<16 | int(b[2])<<8 | int(b[3]),
+		PayloadLen:   int(binary.BigEndian.Uint16(b[4:6])),
+		NextHeader:   int(b[6]),
+		HopLimit:     int(b[7]),
+	}
+	h.Src = make(net.IP, net.IPv6len)
+	copy(h.Src, b[8:24])
+	h.Dst = make(net.IP, net.IPv6len)
+	copy(h.Dst, b[24:40])
+	return h, nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/header_test.go b/vendor/golang.org/x/net/ipv6/header_test.go
new file mode 100644
index 000000000..ca11dc23d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/header_test.go
@@ -0,0 +1,55 @@
+// 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.
+
+package ipv6_test
+
+import (
+	"net"
+	"reflect"
+	"strings"
+	"testing"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/ipv6"
+)
+
+var (
+	wireHeaderFromKernel = [ipv6.HeaderLen]byte{
+		0x69, 0x8b, 0xee, 0xf1,
+		0xca, 0xfe, 0x2c, 0x01,
+		0x20, 0x01, 0x0d, 0xb8,
+		0x00, 0x01, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x01,
+		0x20, 0x01, 0x0d, 0xb8,
+		0x00, 0x02, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x00,
+		0x00, 0x00, 0x00, 0x01,
+	}
+
+	testHeader = &ipv6.Header{
+		Version:      ipv6.Version,
+		TrafficClass: iana.DiffServAF43,
+		FlowLabel:    0xbeef1,
+		PayloadLen:   0xcafe,
+		NextHeader:   iana.ProtocolIPv6Frag,
+		HopLimit:     1,
+		Src:          net.ParseIP("2001:db8:1::1"),
+		Dst:          net.ParseIP("2001:db8:2::1"),
+	}
+)
+
+func TestParseHeader(t *testing.T) {
+	h, err := ipv6.ParseHeader(wireHeaderFromKernel[:])
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(h, testHeader) {
+		t.Fatalf("got %#v; want %#v", h, testHeader)
+	}
+	s := h.String()
+	if strings.Contains(s, ",") {
+		t.Fatalf("should be space-separated values: %s", s)
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/helper.go b/vendor/golang.org/x/net/ipv6/helper.go
new file mode 100644
index 000000000..53b999905
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/helper.go
@@ -0,0 +1,53 @@
+// 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 (
+	"encoding/binary"
+	"errors"
+	"net"
+	"unsafe"
+)
+
+var (
+	errMissingAddress  = errors.New("missing address")
+	errHeaderTooShort  = errors.New("header too short")
+	errInvalidConnType = errors.New("invalid conn type")
+	errOpNoSupport     = errors.New("operation not supported")
+	errNoSuchInterface = errors.New("no such interface")
+
+	nativeEndian binary.ByteOrder
+)
+
+func init() {
+	i := uint32(1)
+	b := (*[4]byte)(unsafe.Pointer(&i))
+	if b[0] == 1 {
+		nativeEndian = binary.LittleEndian
+	} else {
+		nativeEndian = binary.BigEndian
+	}
+}
+
+func boolint(b bool) int {
+	if b {
+		return 1
+	}
+	return 0
+}
+
+func netAddrToIP16(a net.Addr) net.IP {
+	switch v := a.(type) {
+	case *net.UDPAddr:
+		if ip := v.IP.To16(); ip != nil && ip.To4() == nil {
+			return ip
+		}
+	case *net.IPAddr:
+		if ip := v.IP.To16(); ip != nil && ip.To4() == nil {
+			return ip
+		}
+	}
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/iana.go b/vendor/golang.org/x/net/ipv6/iana.go
new file mode 100644
index 000000000..3c6214fb6
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/iana.go
@@ -0,0 +1,82 @@
+// go generate gen.go
+// GENERATED BY THE COMMAND ABOVE; DO NOT EDIT
+
+package ipv6
+
+// Internet Control Message Protocol version 6 (ICMPv6) Parameters, Updated: 2015-07-07
+const (
+	ICMPTypeDestinationUnreachable                ICMPType = 1   // Destination Unreachable
+	ICMPTypePacketTooBig                          ICMPType = 2   // Packet Too Big
+	ICMPTypeTimeExceeded                          ICMPType = 3   // Time Exceeded
+	ICMPTypeParameterProblem                      ICMPType = 4   // Parameter Problem
+	ICMPTypeEchoRequest                           ICMPType = 128 // Echo Request
+	ICMPTypeEchoReply                             ICMPType = 129 // Echo Reply
+	ICMPTypeMulticastListenerQuery                ICMPType = 130 // Multicast Listener Query
+	ICMPTypeMulticastListenerReport               ICMPType = 131 // Multicast Listener Report
+	ICMPTypeMulticastListenerDone                 ICMPType = 132 // Multicast Listener Done
+	ICMPTypeRouterSolicitation                    ICMPType = 133 // Router Solicitation
+	ICMPTypeRouterAdvertisement                   ICMPType = 134 // Router Advertisement
+	ICMPTypeNeighborSolicitation                  ICMPType = 135 // Neighbor Solicitation
+	ICMPTypeNeighborAdvertisement                 ICMPType = 136 // Neighbor Advertisement
+	ICMPTypeRedirect                              ICMPType = 137 // Redirect Message
+	ICMPTypeRouterRenumbering                     ICMPType = 138 // Router Renumbering
+	ICMPTypeNodeInformationQuery                  ICMPType = 139 // ICMP Node Information Query
+	ICMPTypeNodeInformationResponse               ICMPType = 140 // ICMP Node Information Response
+	ICMPTypeInverseNeighborDiscoverySolicitation  ICMPType = 141 // Inverse Neighbor Discovery Solicitation Message
+	ICMPTypeInverseNeighborDiscoveryAdvertisement ICMPType = 142 // Inverse Neighbor Discovery Advertisement Message
+	ICMPTypeVersion2MulticastListenerReport       ICMPType = 143 // Version 2 Multicast Listener Report
+	ICMPTypeHomeAgentAddressDiscoveryRequest      ICMPType = 144 // Home Agent Address Discovery Request Message
+	ICMPTypeHomeAgentAddressDiscoveryReply        ICMPType = 145 // Home Agent Address Discovery Reply Message
+	ICMPTypeMobilePrefixSolicitation              ICMPType = 146 // Mobile Prefix Solicitation
+	ICMPTypeMobilePrefixAdvertisement             ICMPType = 147 // Mobile Prefix Advertisement
+	ICMPTypeCertificationPathSolicitation         ICMPType = 148 // Certification Path Solicitation Message
+	ICMPTypeCertificationPathAdvertisement        ICMPType = 149 // Certification Path Advertisement Message
+	ICMPTypeMulticastRouterAdvertisement          ICMPType = 151 // Multicast Router Advertisement
+	ICMPTypeMulticastRouterSolicitation           ICMPType = 152 // Multicast Router Solicitation
+	ICMPTypeMulticastRouterTermination            ICMPType = 153 // Multicast Router Termination
+	ICMPTypeFMIPv6                                ICMPType = 154 // FMIPv6 Messages
+	ICMPTypeRPLControl                            ICMPType = 155 // RPL Control Message
+	ICMPTypeILNPv6LocatorUpdate                   ICMPType = 156 // ILNPv6 Locator Update Message
+	ICMPTypeDuplicateAddressRequest               ICMPType = 157 // Duplicate Address Request
+	ICMPTypeDuplicateAddressConfirmation          ICMPType = 158 // Duplicate Address Confirmation
+	ICMPTypeMPLControl                            ICMPType = 159 // MPL Control Message
+)
+
+// Internet Control Message Protocol version 6 (ICMPv6) Parameters, Updated: 2015-07-07
+var icmpTypes = map[ICMPType]string{
+	1:   "destination unreachable",
+	2:   "packet too big",
+	3:   "time exceeded",
+	4:   "parameter problem",
+	128: "echo request",
+	129: "echo reply",
+	130: "multicast listener query",
+	131: "multicast listener report",
+	132: "multicast listener done",
+	133: "router solicitation",
+	134: "router advertisement",
+	135: "neighbor solicitation",
+	136: "neighbor advertisement",
+	137: "redirect message",
+	138: "router renumbering",
+	139: "icmp node information query",
+	140: "icmp node information response",
+	141: "inverse neighbor discovery solicitation message",
+	142: "inverse neighbor discovery advertisement message",
+	143: "version 2 multicast listener report",
+	144: "home agent address discovery request message",
+	145: "home agent address discovery reply message",
+	146: "mobile prefix solicitation",
+	147: "mobile prefix advertisement",
+	148: "certification path solicitation message",
+	149: "certification path advertisement message",
+	151: "multicast router advertisement",
+	152: "multicast router solicitation",
+	153: "multicast router termination",
+	154: "fmipv6 messages",
+	155: "rpl control message",
+	156: "ilnpv6 locator update message",
+	157: "duplicate address request",
+	158: "duplicate address confirmation",
+	159: "mpl control message",
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp.go b/vendor/golang.org/x/net/ipv6/icmp.go
new file mode 100644
index 000000000..a2de65a08
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp.go
@@ -0,0 +1,57 @@
+// 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 "golang.org/x/net/internal/iana"
+
+// An ICMPType represents a type of ICMP message.
+type ICMPType int
+
+func (typ ICMPType) String() string {
+	s, ok := icmpTypes[typ]
+	if !ok {
+		return "<nil>"
+	}
+	return s
+}
+
+// Protocol returns the ICMPv6 protocol number.
+func (typ ICMPType) Protocol() int {
+	return iana.ProtocolIPv6ICMP
+}
+
+// An ICMPFilter represents an ICMP message filter for incoming
+// packets. The filter belongs to a packet delivery path on a host and
+// it cannot interact with forwarding packets or tunnel-outer packets.
+//
+// Note: RFC 2460 defines a reasonable role model. A node means a
+// device that implements IP. A router means a node that forwards IP
+// packets not explicitly addressed to itself, and a host means a node
+// that is not a router.
+type ICMPFilter struct {
+	sysICMPv6Filter
+}
+
+// Accept accepts incoming ICMP packets including the type field value
+// typ.
+func (f *ICMPFilter) Accept(typ ICMPType) {
+	f.accept(typ)
+}
+
+// Block blocks incoming ICMP packets including the type field value
+// typ.
+func (f *ICMPFilter) Block(typ ICMPType) {
+	f.block(typ)
+}
+
+// SetAll sets the filter action to the filter.
+func (f *ICMPFilter) SetAll(block bool) {
+	f.setAll(block)
+}
+
+// WillBlock reports whether the ICMP type will be blocked.
+func (f *ICMPFilter) WillBlock(typ ICMPType) bool {
+	return f.willBlock(typ)
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_bsd.go b/vendor/golang.org/x/net/ipv6/icmp_bsd.go
new file mode 100644
index 000000000..30e3ce424
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_bsd.go
@@ -0,0 +1,29 @@
+// 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.
+
+// +build darwin dragonfly freebsd netbsd openbsd
+
+package ipv6
+
+func (f *sysICMPv6Filter) accept(typ ICMPType) {
+	f.Filt[typ>>5] |= 1 << (uint32(typ) & 31)
+}
+
+func (f *sysICMPv6Filter) block(typ ICMPType) {
+	f.Filt[typ>>5] &^= 1 << (uint32(typ) & 31)
+}
+
+func (f *sysICMPv6Filter) setAll(block bool) {
+	for i := range f.Filt {
+		if block {
+			f.Filt[i] = 0
+		} else {
+			f.Filt[i] = 1<<32 - 1
+		}
+	}
+}
+
+func (f *sysICMPv6Filter) willBlock(typ ICMPType) bool {
+	return f.Filt[typ>>5]&(1<<(uint32(typ)&31)) == 0
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_linux.go b/vendor/golang.org/x/net/ipv6/icmp_linux.go
new file mode 100644
index 000000000..a67ecf690
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_linux.go
@@ -0,0 +1,27 @@
+// 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
+
+func (f *sysICMPv6Filter) accept(typ ICMPType) {
+	f.Data[typ>>5] &^= 1 << (uint32(typ) & 31)
+}
+
+func (f *sysICMPv6Filter) block(typ ICMPType) {
+	f.Data[typ>>5] |= 1 << (uint32(typ) & 31)
+}
+
+func (f *sysICMPv6Filter) setAll(block bool) {
+	for i := range f.Data {
+		if block {
+			f.Data[i] = 1<<32 - 1
+		} else {
+			f.Data[i] = 0
+		}
+	}
+}
+
+func (f *sysICMPv6Filter) willBlock(typ ICMPType) bool {
+	return f.Data[typ>>5]&(1<<(uint32(typ)&31)) != 0
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_solaris.go b/vendor/golang.org/x/net/ipv6/icmp_solaris.go
new file mode 100644
index 000000000..a942f354c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_solaris.go
@@ -0,0 +1,24 @@
+// 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.
+
+// +build solaris
+
+package ipv6
+
+func (f *sysICMPv6Filter) accept(typ ICMPType) {
+	// TODO(mikio): implement this
+}
+
+func (f *sysICMPv6Filter) block(typ ICMPType) {
+	// TODO(mikio): implement this
+}
+
+func (f *sysICMPv6Filter) setAll(block bool) {
+	// TODO(mikio): implement this
+}
+
+func (f *sysICMPv6Filter) willBlock(typ ICMPType) bool {
+	// TODO(mikio): implement this
+	return false
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_stub.go b/vendor/golang.org/x/net/ipv6/icmp_stub.go
new file mode 100644
index 000000000..c1263ecac
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_stub.go
@@ -0,0 +1,23 @@
+// 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.
+
+// +build nacl plan9
+
+package ipv6
+
+type sysICMPv6Filter struct {
+}
+
+func (f *sysICMPv6Filter) accept(typ ICMPType) {
+}
+
+func (f *sysICMPv6Filter) block(typ ICMPType) {
+}
+
+func (f *sysICMPv6Filter) setAll(block bool) {
+}
+
+func (f *sysICMPv6Filter) willBlock(typ ICMPType) bool {
+	return false
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_test.go b/vendor/golang.org/x/net/ipv6/icmp_test.go
new file mode 100644
index 000000000..e192d6d8c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_test.go
@@ -0,0 +1,96 @@
+// 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_test
+
+import (
+	"net"
+	"reflect"
+	"runtime"
+	"testing"
+
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+var icmpStringTests = []struct {
+	in  ipv6.ICMPType
+	out string
+}{
+	{ipv6.ICMPTypeDestinationUnreachable, "destination unreachable"},
+
+	{256, "<nil>"},
+}
+
+func TestICMPString(t *testing.T) {
+	for _, tt := range icmpStringTests {
+		s := tt.in.String()
+		if s != tt.out {
+			t.Errorf("got %s; want %s", s, tt.out)
+		}
+	}
+}
+
+func TestICMPFilter(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+
+	var f ipv6.ICMPFilter
+	for _, toggle := range []bool{false, true} {
+		f.SetAll(toggle)
+		for _, typ := range []ipv6.ICMPType{
+			ipv6.ICMPTypeDestinationUnreachable,
+			ipv6.ICMPTypeEchoReply,
+			ipv6.ICMPTypeNeighborSolicitation,
+			ipv6.ICMPTypeDuplicateAddressConfirmation,
+		} {
+			f.Accept(typ)
+			if f.WillBlock(typ) {
+				t.Errorf("ipv6.ICMPFilter.Set(%v, false) failed", typ)
+			}
+			f.Block(typ)
+			if !f.WillBlock(typ) {
+				t.Errorf("ipv6.ICMPFilter.Set(%v, true) failed", typ)
+			}
+		}
+	}
+}
+
+func TestSetICMPFilter(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	if m, ok := nettest.SupportsRawIPSocket(); !ok {
+		t.Skip(m)
+	}
+
+	c, err := net.ListenPacket("ip6:ipv6-icmp", "::1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	p := ipv6.NewPacketConn(c)
+
+	var f ipv6.ICMPFilter
+	f.SetAll(true)
+	f.Accept(ipv6.ICMPTypeEchoRequest)
+	f.Accept(ipv6.ICMPTypeEchoReply)
+	if err := p.SetICMPFilter(&f); err != nil {
+		t.Fatal(err)
+	}
+	kf, err := p.ICMPFilter()
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !reflect.DeepEqual(kf, &f) {
+		t.Fatalf("got %#v; want %#v", kf, f)
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/icmp_windows.go b/vendor/golang.org/x/net/ipv6/icmp_windows.go
new file mode 100644
index 000000000..f477a8c0d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/icmp_windows.go
@@ -0,0 +1,22 @@
+// 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
+
+func (f *sysICMPv6Filter) accept(typ ICMPType) {
+	// TODO(mikio): implement this
+}
+
+func (f *sysICMPv6Filter) block(typ ICMPType) {
+	// TODO(mikio): implement this
+}
+
+func (f *sysICMPv6Filter) setAll(block bool) {
+	// TODO(mikio): implement this
+}
+
+func (f *sysICMPv6Filter) willBlock(typ ICMPType) bool {
+	// TODO(mikio): implement this
+	return false
+}
diff --git a/vendor/golang.org/x/net/ipv6/main_test.go b/vendor/golang.org/x/net/ipv6/main_test.go
new file mode 100644
index 000000000..6ae53bb10
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/main_test.go
@@ -0,0 +1,27 @@
+// 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_test
+
+import (
+	"flag"
+	"fmt"
+	"os"
+	"os/exec"
+	"runtime"
+	"strings"
+	"testing"
+)
+
+func TestMain(m *testing.M) {
+	flag.Parse()
+	if runtime.GOOS == "darwin" {
+		vers, _ := exec.Command("sw_vers", "-productVersion").Output()
+		if string(vers) == "10.8" || strings.HasPrefix(string(vers), "10.8.") {
+			fmt.Fprintf(os.Stderr, "# skipping tests on OS X 10.8 to avoid kernel panics; golang.org/issue/17015\n")
+			os.Exit(0)
+		}
+	}
+	os.Exit(m.Run())
+}
diff --git a/vendor/golang.org/x/net/ipv6/mocktransponder_test.go b/vendor/golang.org/x/net/ipv6/mocktransponder_test.go
new file mode 100644
index 000000000..d587922a1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/mocktransponder_test.go
@@ -0,0 +1,32 @@
+// 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_test
+
+import (
+	"net"
+	"testing"
+)
+
+func connector(t *testing.T, network, addr string, done chan<- bool) {
+	defer func() { done <- true }()
+
+	c, err := net.Dial(network, addr)
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	c.Close()
+}
+
+func acceptor(t *testing.T, ln net.Listener, done chan<- bool) {
+	defer func() { done <- true }()
+
+	c, err := ln.Accept()
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	c.Close()
+}
diff --git a/vendor/golang.org/x/net/ipv6/multicast_test.go b/vendor/golang.org/x/net/ipv6/multicast_test.go
new file mode 100644
index 000000000..a3a8979d2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/multicast_test.go
@@ -0,0 +1,260 @@
+// 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_test
+
+import (
+	"bytes"
+	"net"
+	"os"
+	"runtime"
+	"testing"
+	"time"
+
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+var packetConnReadWriteMulticastUDPTests = []struct {
+	addr     string
+	grp, src *net.UDPAddr
+}{
+	{"[ff02::]:0", &net.UDPAddr{IP: net.ParseIP("ff02::114")}, nil}, // see RFC 4727
+
+	{"[ff30::8000:0]:0", &net.UDPAddr{IP: net.ParseIP("ff30::8000:1")}, &net.UDPAddr{IP: net.IPv6loopback}}, // see RFC 5771
+}
+
+func TestPacketConnReadWriteMulticastUDP(t *testing.T) {
+	switch runtime.GOOS {
+	case "freebsd": // due to a bug on loopback marking
+		// See http://www.freebsd.org/cgi/query-pr.cgi?pr=180065.
+		t.Skipf("not supported on %s", runtime.GOOS)
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
+	if ifi == nil {
+		t.Skipf("not available on %s", runtime.GOOS)
+	}
+
+	for _, tt := range packetConnReadWriteMulticastUDPTests {
+		c, err := net.ListenPacket("udp6", tt.addr)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+
+		grp := *tt.grp
+		grp.Port = c.LocalAddr().(*net.UDPAddr).Port
+		p := ipv6.NewPacketConn(c)
+		defer p.Close()
+		if tt.src == nil {
+			if err := p.JoinGroup(ifi, &grp); err != nil {
+				t.Fatal(err)
+			}
+			defer p.LeaveGroup(ifi, &grp)
+		} else {
+			if err := p.JoinSourceSpecificGroup(ifi, &grp, tt.src); err != nil {
+				switch runtime.GOOS {
+				case "freebsd", "linux":
+				default: // platforms that don't support MLDv2 fail here
+					t.Logf("not supported on %s", runtime.GOOS)
+					continue
+				}
+				t.Fatal(err)
+			}
+			defer p.LeaveSourceSpecificGroup(ifi, &grp, tt.src)
+		}
+		if err := p.SetMulticastInterface(ifi); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := p.MulticastInterface(); err != nil {
+			t.Fatal(err)
+		}
+		if err := p.SetMulticastLoopback(true); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := p.MulticastLoopback(); err != nil {
+			t.Fatal(err)
+		}
+
+		cm := ipv6.ControlMessage{
+			TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
+			Src:          net.IPv6loopback,
+			IfIndex:      ifi.Index,
+		}
+		cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
+		wb := []byte("HELLO-R-U-THERE")
+
+		for i, toggle := range []bool{true, false, true} {
+			if err := p.SetControlMessage(cf, toggle); err != nil {
+				if nettest.ProtocolNotSupported(err) {
+					t.Logf("not supported on %s", runtime.GOOS)
+					continue
+				}
+				t.Fatal(err)
+			}
+			if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
+				t.Fatal(err)
+			}
+			cm.HopLimit = i + 1
+			if n, err := p.WriteTo(wb, &cm, &grp); err != nil {
+				t.Fatal(err)
+			} else if n != len(wb) {
+				t.Fatal(err)
+			}
+			rb := make([]byte, 128)
+			if n, _, _, err := p.ReadFrom(rb); err != nil {
+				t.Fatal(err)
+			} else if !bytes.Equal(rb[:n], wb) {
+				t.Fatalf("got %v; want %v", rb[:n], wb)
+			}
+		}
+	}
+}
+
+var packetConnReadWriteMulticastICMPTests = []struct {
+	grp, src *net.IPAddr
+}{
+	{&net.IPAddr{IP: net.ParseIP("ff02::114")}, nil}, // see RFC 4727
+
+	{&net.IPAddr{IP: net.ParseIP("ff30::8000:1")}, &net.IPAddr{IP: net.IPv6loopback}}, // see RFC 5771
+}
+
+func TestPacketConnReadWriteMulticastICMP(t *testing.T) {
+	switch runtime.GOOS {
+	case "freebsd": // due to a bug on loopback marking
+		// See http://www.freebsd.org/cgi/query-pr.cgi?pr=180065.
+		t.Skipf("not supported on %s", runtime.GOOS)
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	if m, ok := nettest.SupportsRawIPSocket(); !ok {
+		t.Skip(m)
+	}
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
+	if ifi == nil {
+		t.Skipf("not available on %s", runtime.GOOS)
+	}
+
+	for _, tt := range packetConnReadWriteMulticastICMPTests {
+		c, err := net.ListenPacket("ip6:ipv6-icmp", "::")
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+
+		pshicmp := icmp.IPv6PseudoHeader(c.LocalAddr().(*net.IPAddr).IP, tt.grp.IP)
+		p := ipv6.NewPacketConn(c)
+		defer p.Close()
+		if tt.src == nil {
+			if err := p.JoinGroup(ifi, tt.grp); err != nil {
+				t.Fatal(err)
+			}
+			defer p.LeaveGroup(ifi, tt.grp)
+		} else {
+			if err := p.JoinSourceSpecificGroup(ifi, tt.grp, tt.src); err != nil {
+				switch runtime.GOOS {
+				case "freebsd", "linux":
+				default: // platforms that don't support MLDv2 fail here
+					t.Logf("not supported on %s", runtime.GOOS)
+					continue
+				}
+				t.Fatal(err)
+			}
+			defer p.LeaveSourceSpecificGroup(ifi, tt.grp, tt.src)
+		}
+		if err := p.SetMulticastInterface(ifi); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := p.MulticastInterface(); err != nil {
+			t.Fatal(err)
+		}
+		if err := p.SetMulticastLoopback(true); err != nil {
+			t.Fatal(err)
+		}
+		if _, err := p.MulticastLoopback(); err != nil {
+			t.Fatal(err)
+		}
+
+		cm := ipv6.ControlMessage{
+			TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
+			Src:          net.IPv6loopback,
+			IfIndex:      ifi.Index,
+		}
+		cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
+
+		var f ipv6.ICMPFilter
+		f.SetAll(true)
+		f.Accept(ipv6.ICMPTypeEchoReply)
+		if err := p.SetICMPFilter(&f); err != nil {
+			t.Fatal(err)
+		}
+
+		var psh []byte
+		for i, toggle := range []bool{true, false, true} {
+			if toggle {
+				psh = nil
+				if err := p.SetChecksum(true, 2); err != nil {
+					t.Fatal(err)
+				}
+			} else {
+				psh = pshicmp
+				// Some platforms never allow to
+				// disable the kernel checksum
+				// processing.
+				p.SetChecksum(false, -1)
+			}
+			wb, err := (&icmp.Message{
+				Type: ipv6.ICMPTypeEchoRequest, Code: 0,
+				Body: &icmp.Echo{
+					ID: os.Getpid() & 0xffff, Seq: i + 1,
+					Data: []byte("HELLO-R-U-THERE"),
+				},
+			}).Marshal(psh)
+			if err != nil {
+				t.Fatal(err)
+			}
+			if err := p.SetControlMessage(cf, toggle); err != nil {
+				if nettest.ProtocolNotSupported(err) {
+					t.Logf("not supported on %s", runtime.GOOS)
+					continue
+				}
+				t.Fatal(err)
+			}
+			if err := p.SetDeadline(time.Now().Add(200 * time.Millisecond)); err != nil {
+				t.Fatal(err)
+			}
+			cm.HopLimit = i + 1
+			if n, err := p.WriteTo(wb, &cm, tt.grp); err != nil {
+				t.Fatal(err)
+			} else if n != len(wb) {
+				t.Fatalf("got %v; want %v", n, len(wb))
+			}
+			rb := make([]byte, 128)
+			if n, _, _, err := p.ReadFrom(rb); err != nil {
+				switch runtime.GOOS {
+				case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
+					t.Logf("not supported on %s", runtime.GOOS)
+					continue
+				}
+				t.Fatal(err)
+			} else {
+				if m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n]); err != nil {
+					t.Fatal(err)
+				} else if m.Type != ipv6.ICMPTypeEchoReply || m.Code != 0 {
+					t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv6.ICMPTypeEchoReply, 0)
+				}
+			}
+		}
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/multicastlistener_test.go b/vendor/golang.org/x/net/ipv6/multicastlistener_test.go
new file mode 100644
index 000000000..9711f7513
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/multicastlistener_test.go
@@ -0,0 +1,246 @@
+// 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_test
+
+import (
+	"fmt"
+	"net"
+	"runtime"
+	"testing"
+
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+var udpMultipleGroupListenerTests = []net.Addr{
+	&net.UDPAddr{IP: net.ParseIP("ff02::114")}, // see RFC 4727
+	&net.UDPAddr{IP: net.ParseIP("ff02::1:114")},
+	&net.UDPAddr{IP: net.ParseIP("ff02::2:114")},
+}
+
+func TestUDPSinglePacketConnWithMultipleGroupListeners(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	for _, gaddr := range udpMultipleGroupListenerTests {
+		c, err := net.ListenPacket("udp6", "[::]:0") // wildcard address with non-reusable port
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+
+		p := ipv6.NewPacketConn(c)
+		var mift []*net.Interface
+
+		ift, err := net.Interfaces()
+		if err != nil {
+			t.Fatal(err)
+		}
+		for i, ifi := range ift {
+			if _, ok := nettest.IsMulticastCapable("ip6", &ifi); !ok {
+				continue
+			}
+			if err := p.JoinGroup(&ifi, gaddr); err != nil {
+				t.Fatal(err)
+			}
+			mift = append(mift, &ift[i])
+		}
+		for _, ifi := range mift {
+			if err := p.LeaveGroup(ifi, gaddr); err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+}
+
+func TestUDPMultiplePacketConnWithMultipleGroupListeners(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	for _, gaddr := range udpMultipleGroupListenerTests {
+		c1, err := net.ListenPacket("udp6", "[ff02::]:1024") // wildcard address with reusable port
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c1.Close()
+
+		c2, err := net.ListenPacket("udp6", "[ff02::]:1024") // wildcard address with reusable port
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c2.Close()
+
+		var ps [2]*ipv6.PacketConn
+		ps[0] = ipv6.NewPacketConn(c1)
+		ps[1] = ipv6.NewPacketConn(c2)
+		var mift []*net.Interface
+
+		ift, err := net.Interfaces()
+		if err != nil {
+			t.Fatal(err)
+		}
+		for i, ifi := range ift {
+			if _, ok := nettest.IsMulticastCapable("ip6", &ifi); !ok {
+				continue
+			}
+			for _, p := range ps {
+				if err := p.JoinGroup(&ifi, gaddr); err != nil {
+					t.Fatal(err)
+				}
+			}
+			mift = append(mift, &ift[i])
+		}
+		for _, ifi := range mift {
+			for _, p := range ps {
+				if err := p.LeaveGroup(ifi, gaddr); err != nil {
+					t.Fatal(err)
+				}
+			}
+		}
+	}
+}
+
+func TestUDPPerInterfaceSinglePacketConnWithSingleGroupListener(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	gaddr := net.IPAddr{IP: net.ParseIP("ff02::114")} // see RFC 4727
+	type ml struct {
+		c   *ipv6.PacketConn
+		ifi *net.Interface
+	}
+	var mlt []*ml
+
+	ift, err := net.Interfaces()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for i, ifi := range ift {
+		ip, ok := nettest.IsMulticastCapable("ip6", &ifi)
+		if !ok {
+			continue
+		}
+		c, err := net.ListenPacket("udp6", fmt.Sprintf("[%s%%%s]:1024", ip.String(), ifi.Name)) // unicast address with non-reusable port
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+		p := ipv6.NewPacketConn(c)
+		if err := p.JoinGroup(&ifi, &gaddr); err != nil {
+			t.Fatal(err)
+		}
+		mlt = append(mlt, &ml{p, &ift[i]})
+	}
+	for _, m := range mlt {
+		if err := m.c.LeaveGroup(m.ifi, &gaddr); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestIPSinglePacketConnWithSingleGroupListener(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	if m, ok := nettest.SupportsRawIPSocket(); !ok {
+		t.Skip(m)
+	}
+
+	c, err := net.ListenPacket("ip6:ipv6-icmp", "::") // wildcard address
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	p := ipv6.NewPacketConn(c)
+	gaddr := net.IPAddr{IP: net.ParseIP("ff02::114")} // see RFC 4727
+	var mift []*net.Interface
+
+	ift, err := net.Interfaces()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for i, ifi := range ift {
+		if _, ok := nettest.IsMulticastCapable("ip6", &ifi); !ok {
+			continue
+		}
+		if err := p.JoinGroup(&ifi, &gaddr); err != nil {
+			t.Fatal(err)
+		}
+		mift = append(mift, &ift[i])
+	}
+	for _, ifi := range mift {
+		if err := p.LeaveGroup(ifi, &gaddr); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
+
+func TestIPPerInterfaceSinglePacketConnWithSingleGroupListener(t *testing.T) {
+	switch runtime.GOOS {
+	case "darwin", "dragonfly", "openbsd": // platforms that return fe80::1%lo0: bind: can't assign requested address
+		t.Skipf("not supported on %s", runtime.GOOS)
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	if m, ok := nettest.SupportsRawIPSocket(); !ok {
+		t.Skip(m)
+	}
+
+	gaddr := net.IPAddr{IP: net.ParseIP("ff02::114")} // see RFC 4727
+	type ml struct {
+		c   *ipv6.PacketConn
+		ifi *net.Interface
+	}
+	var mlt []*ml
+
+	ift, err := net.Interfaces()
+	if err != nil {
+		t.Fatal(err)
+	}
+	for i, ifi := range ift {
+		ip, ok := nettest.IsMulticastCapable("ip6", &ifi)
+		if !ok {
+			continue
+		}
+		c, err := net.ListenPacket("ip6:ipv6-icmp", fmt.Sprintf("%s%%%s", ip.String(), ifi.Name)) // unicast address
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+		p := ipv6.NewPacketConn(c)
+		if err := p.JoinGroup(&ifi, &gaddr); err != nil {
+			t.Fatal(err)
+		}
+		mlt = append(mlt, &ml{p, &ift[i]})
+	}
+	for _, m := range mlt {
+		if err := m.c.LeaveGroup(m.ifi, &gaddr); err != nil {
+			t.Fatal(err)
+		}
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/multicastsockopt_test.go b/vendor/golang.org/x/net/ipv6/multicastsockopt_test.go
new file mode 100644
index 000000000..fe0e6e1b1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/multicastsockopt_test.go
@@ -0,0 +1,157 @@
+// 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_test
+
+import (
+	"net"
+	"runtime"
+	"testing"
+
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+var packetConnMulticastSocketOptionTests = []struct {
+	net, proto, addr string
+	grp, src         net.Addr
+}{
+	{"udp6", "", "[ff02::]:0", &net.UDPAddr{IP: net.ParseIP("ff02::114")}, nil}, // see RFC 4727
+	{"ip6", ":ipv6-icmp", "::", &net.IPAddr{IP: net.ParseIP("ff02::115")}, nil}, // see RFC 4727
+
+	{"udp6", "", "[ff30::8000:0]:0", &net.UDPAddr{IP: net.ParseIP("ff30::8000:1")}, &net.UDPAddr{IP: net.IPv6loopback}}, // see RFC 5771
+	{"ip6", ":ipv6-icmp", "::", &net.IPAddr{IP: net.ParseIP("ff30::8000:2")}, &net.IPAddr{IP: net.IPv6loopback}},        // see RFC 5771
+}
+
+func TestPacketConnMulticastSocketOptions(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagMulticast|net.FlagLoopback)
+	if ifi == nil {
+		t.Skipf("not available on %s", runtime.GOOS)
+	}
+
+	m, ok := nettest.SupportsRawIPSocket()
+	for _, tt := range packetConnMulticastSocketOptionTests {
+		if tt.net == "ip6" && !ok {
+			t.Log(m)
+			continue
+		}
+		c, err := net.ListenPacket(tt.net+tt.proto, tt.addr)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+		p := ipv6.NewPacketConn(c)
+		defer p.Close()
+
+		if tt.src == nil {
+			testMulticastSocketOptions(t, p, ifi, tt.grp)
+		} else {
+			testSourceSpecificMulticastSocketOptions(t, p, ifi, tt.grp, tt.src)
+		}
+	}
+}
+
+type testIPv6MulticastConn interface {
+	MulticastHopLimit() (int, error)
+	SetMulticastHopLimit(ttl int) error
+	MulticastLoopback() (bool, error)
+	SetMulticastLoopback(bool) error
+	JoinGroup(*net.Interface, net.Addr) error
+	LeaveGroup(*net.Interface, net.Addr) error
+	JoinSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+	LeaveSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+	ExcludeSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+	IncludeSourceSpecificGroup(*net.Interface, net.Addr, net.Addr) error
+}
+
+func testMulticastSocketOptions(t *testing.T, c testIPv6MulticastConn, ifi *net.Interface, grp net.Addr) {
+	const hoplim = 255
+	if err := c.SetMulticastHopLimit(hoplim); err != nil {
+		t.Error(err)
+		return
+	}
+	if v, err := c.MulticastHopLimit(); err != nil {
+		t.Error(err)
+		return
+	} else if v != hoplim {
+		t.Errorf("got %v; want %v", v, hoplim)
+		return
+	}
+
+	for _, toggle := range []bool{true, false} {
+		if err := c.SetMulticastLoopback(toggle); err != nil {
+			t.Error(err)
+			return
+		}
+		if v, err := c.MulticastLoopback(); err != nil {
+			t.Error(err)
+			return
+		} else if v != toggle {
+			t.Errorf("got %v; want %v", v, toggle)
+			return
+		}
+	}
+
+	if err := c.JoinGroup(ifi, grp); err != nil {
+		t.Error(err)
+		return
+	}
+	if err := c.LeaveGroup(ifi, grp); err != nil {
+		t.Error(err)
+		return
+	}
+}
+
+func testSourceSpecificMulticastSocketOptions(t *testing.T, c testIPv6MulticastConn, ifi *net.Interface, grp, src net.Addr) {
+	// MCAST_JOIN_GROUP -> MCAST_BLOCK_SOURCE -> MCAST_UNBLOCK_SOURCE -> MCAST_LEAVE_GROUP
+	if err := c.JoinGroup(ifi, grp); err != nil {
+		t.Error(err)
+		return
+	}
+	if err := c.ExcludeSourceSpecificGroup(ifi, grp, src); err != nil {
+		switch runtime.GOOS {
+		case "freebsd", "linux":
+		default: // platforms that don't support MLDv2 fail here
+			t.Logf("not supported on %s", runtime.GOOS)
+			return
+		}
+		t.Error(err)
+		return
+	}
+	if err := c.IncludeSourceSpecificGroup(ifi, grp, src); err != nil {
+		t.Error(err)
+		return
+	}
+	if err := c.LeaveGroup(ifi, grp); err != nil {
+		t.Error(err)
+		return
+	}
+
+	// MCAST_JOIN_SOURCE_GROUP -> MCAST_LEAVE_SOURCE_GROUP
+	if err := c.JoinSourceSpecificGroup(ifi, grp, src); err != nil {
+		t.Error(err)
+		return
+	}
+	if err := c.LeaveSourceSpecificGroup(ifi, grp, src); err != nil {
+		t.Error(err)
+		return
+	}
+
+	// MCAST_JOIN_SOURCE_GROUP -> MCAST_LEAVE_GROUP
+	if err := c.JoinSourceSpecificGroup(ifi, grp, src); err != nil {
+		t.Error(err)
+		return
+	}
+	if err := c.LeaveGroup(ifi, grp); err != nil {
+		t.Error(err)
+		return
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/payload.go b/vendor/golang.org/x/net/ipv6/payload.go
new file mode 100644
index 000000000..529b20bca
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload.go
@@ -0,0 +1,15 @@
+// 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"
+
+// A payloadHandler represents the IPv6 datagram payload handler.
+type payloadHandler struct {
+	net.PacketConn
+	rawOpt
+}
+
+func (c *payloadHandler) ok() bool { return c != nil && c.PacketConn != nil }
diff --git a/vendor/golang.org/x/net/ipv6/payload_cmsg.go b/vendor/golang.org/x/net/ipv6/payload_cmsg.go
new file mode 100644
index 000000000..8e90d324d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload_cmsg.go
@@ -0,0 +1,70 @@
+// 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.
+
+// +build !nacl,!plan9,!windows
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+)
+
+// ReadFrom reads a payload of the received IPv6 datagram, from the
+// endpoint c, copying the payload into b.  It returns the number of
+// bytes copied into b, the control message cm and the source address
+// src of the received datagram.
+func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	if !c.ok() {
+		return 0, nil, nil, syscall.EINVAL
+	}
+	oob := newControlMessage(&c.rawOpt)
+	var oobn int
+	switch c := c.PacketConn.(type) {
+	case *net.UDPConn:
+		if n, oobn, _, src, err = c.ReadMsgUDP(b, oob); err != nil {
+			return 0, nil, nil, err
+		}
+	case *net.IPConn:
+		if n, oobn, _, src, err = c.ReadMsgIP(b, oob); err != nil {
+			return 0, nil, nil, err
+		}
+	default:
+		return 0, nil, nil, errInvalidConnType
+	}
+	if cm, err = parseControlMessage(oob[:oobn]); err != nil {
+		return 0, nil, nil, err
+	}
+	if cm != nil {
+		cm.Src = netAddrToIP16(src)
+	}
+	return
+}
+
+// WriteTo writes a payload of the IPv6 datagram, to the destination
+// address dst through the endpoint c, copying the payload from b.  It
+// returns the number of bytes written.  The control message cm allows
+// the IPv6 header fields and the datagram path to be specified.  The
+// cm may be nil if control of the outgoing datagram is not required.
+func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	oob := marshalControlMessage(cm)
+	if dst == nil {
+		return 0, errMissingAddress
+	}
+	switch c := c.PacketConn.(type) {
+	case *net.UDPConn:
+		n, _, err = c.WriteMsgUDP(b, oob, dst.(*net.UDPAddr))
+	case *net.IPConn:
+		n, _, err = c.WriteMsgIP(b, oob, dst.(*net.IPAddr))
+	default:
+		return 0, errInvalidConnType
+	}
+	if err != nil {
+		return 0, err
+	}
+	return
+}
diff --git a/vendor/golang.org/x/net/ipv6/payload_nocmsg.go b/vendor/golang.org/x/net/ipv6/payload_nocmsg.go
new file mode 100644
index 000000000..499204d0c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/payload_nocmsg.go
@@ -0,0 +1,41 @@
+// 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.
+
+// +build nacl plan9 windows
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+)
+
+// ReadFrom reads a payload of the received IPv6 datagram, from the
+// endpoint c, copying the payload into b.  It returns the number of
+// bytes copied into b, the control message cm and the source address
+// src of the received datagram.
+func (c *payloadHandler) ReadFrom(b []byte) (n int, cm *ControlMessage, src net.Addr, err error) {
+	if !c.ok() {
+		return 0, nil, nil, syscall.EINVAL
+	}
+	if n, src, err = c.PacketConn.ReadFrom(b); err != nil {
+		return 0, nil, nil, err
+	}
+	return
+}
+
+// WriteTo writes a payload of the IPv6 datagram, to the destination
+// address dst through the endpoint c, copying the payload from b.  It
+// returns the number of bytes written.  The control message cm allows
+// the IPv6 header fields and the datagram path to be specified.  The
+// cm may be nil if control of the outgoing datagram is not required.
+func (c *payloadHandler) WriteTo(b []byte, cm *ControlMessage, dst net.Addr) (n int, err error) {
+	if !c.ok() {
+		return 0, syscall.EINVAL
+	}
+	if dst == nil {
+		return 0, errMissingAddress
+	}
+	return c.PacketConn.WriteTo(b, dst)
+}
diff --git a/vendor/golang.org/x/net/ipv6/readwrite_test.go b/vendor/golang.org/x/net/ipv6/readwrite_test.go
new file mode 100644
index 000000000..8c8c6fde0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/readwrite_test.go
@@ -0,0 +1,189 @@
+// 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_test
+
+import (
+	"bytes"
+	"net"
+	"runtime"
+	"strings"
+	"sync"
+	"testing"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+func benchmarkUDPListener() (net.PacketConn, net.Addr, error) {
+	c, err := net.ListenPacket("udp6", "[::1]:0")
+	if err != nil {
+		return nil, nil, err
+	}
+	dst, err := net.ResolveUDPAddr("udp6", c.LocalAddr().String())
+	if err != nil {
+		c.Close()
+		return nil, nil, err
+	}
+	return c, dst, nil
+}
+
+func BenchmarkReadWriteNetUDP(b *testing.B) {
+	if !supportsIPv6 {
+		b.Skip("ipv6 is not supported")
+	}
+
+	c, dst, err := benchmarkUDPListener()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer c.Close()
+
+	wb, rb := []byte("HELLO-R-U-THERE"), make([]byte, 128)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		benchmarkReadWriteNetUDP(b, c, wb, rb, dst)
+	}
+}
+
+func benchmarkReadWriteNetUDP(b *testing.B, c net.PacketConn, wb, rb []byte, dst net.Addr) {
+	if _, err := c.WriteTo(wb, dst); err != nil {
+		b.Fatal(err)
+	}
+	if _, _, err := c.ReadFrom(rb); err != nil {
+		b.Fatal(err)
+	}
+}
+
+func BenchmarkReadWriteIPv6UDP(b *testing.B) {
+	if !supportsIPv6 {
+		b.Skip("ipv6 is not supported")
+	}
+
+	c, dst, err := benchmarkUDPListener()
+	if err != nil {
+		b.Fatal(err)
+	}
+	defer c.Close()
+
+	p := ipv6.NewPacketConn(c)
+	cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
+	if err := p.SetControlMessage(cf, true); err != nil {
+		b.Fatal(err)
+	}
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
+
+	wb, rb := []byte("HELLO-R-U-THERE"), make([]byte, 128)
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		benchmarkReadWriteIPv6UDP(b, p, wb, rb, dst, ifi)
+	}
+}
+
+func benchmarkReadWriteIPv6UDP(b *testing.B, p *ipv6.PacketConn, wb, rb []byte, dst net.Addr, ifi *net.Interface) {
+	cm := ipv6.ControlMessage{
+		TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
+		HopLimit:     1,
+	}
+	if ifi != nil {
+		cm.IfIndex = ifi.Index
+	}
+	if n, err := p.WriteTo(wb, &cm, dst); err != nil {
+		b.Fatal(err)
+	} else if n != len(wb) {
+		b.Fatalf("got %v; want %v", n, len(wb))
+	}
+	if _, _, _, err := p.ReadFrom(rb); err != nil {
+		b.Fatal(err)
+	}
+}
+
+func TestPacketConnConcurrentReadWriteUnicastUDP(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	c, err := net.ListenPacket("udp6", "[::1]:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv6.NewPacketConn(c)
+	defer p.Close()
+
+	dst, err := net.ResolveUDPAddr("udp6", c.LocalAddr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
+	cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
+	wb := []byte("HELLO-R-U-THERE")
+
+	if err := p.SetControlMessage(cf, true); err != nil { // probe before test
+		if nettest.ProtocolNotSupported(err) {
+			t.Skipf("not supported on %s", runtime.GOOS)
+		}
+		t.Fatal(err)
+	}
+
+	var wg sync.WaitGroup
+	reader := func() {
+		defer wg.Done()
+		rb := make([]byte, 128)
+		if n, cm, _, err := p.ReadFrom(rb); err != nil {
+			t.Error(err)
+			return
+		} else if !bytes.Equal(rb[:n], wb) {
+			t.Errorf("got %v; want %v", rb[:n], wb)
+			return
+		} else {
+			s := cm.String()
+			if strings.Contains(s, ",") {
+				t.Errorf("should be space-separated values: %s", s)
+			}
+		}
+	}
+	writer := func(toggle bool) {
+		defer wg.Done()
+		cm := ipv6.ControlMessage{
+			TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
+			Src:          net.IPv6loopback,
+		}
+		if ifi != nil {
+			cm.IfIndex = ifi.Index
+		}
+		if err := p.SetControlMessage(cf, toggle); err != nil {
+			t.Error(err)
+			return
+		}
+		if n, err := p.WriteTo(wb, &cm, dst); err != nil {
+			t.Error(err)
+			return
+		} else if n != len(wb) {
+			t.Errorf("got %v; want %v", n, len(wb))
+			return
+		}
+	}
+
+	const N = 10
+	wg.Add(N)
+	for i := 0; i < N; i++ {
+		go reader()
+	}
+	wg.Add(2 * N)
+	for i := 0; i < 2*N; i++ {
+		go writer(i%2 != 0)
+	}
+	wg.Add(N)
+	for i := 0; i < N; i++ {
+		go reader()
+	}
+	wg.Wait()
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt.go b/vendor/golang.org/x/net/ipv6/sockopt.go
new file mode 100644
index 000000000..f0cfc2f94
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt.go
@@ -0,0 +1,46 @@
+// 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.
+
+package ipv6
+
+// Sticky socket options
+const (
+	ssoTrafficClass        = iota // header field for unicast packet, RFC 3542
+	ssoHopLimit                   // header field for unicast packet, RFC 3493
+	ssoMulticastInterface         // outbound interface for multicast packet, RFC 3493
+	ssoMulticastHopLimit          // header field for multicast packet, RFC 3493
+	ssoMulticastLoopback          // loopback for multicast packet, RFC 3493
+	ssoReceiveTrafficClass        // header field on received packet, RFC 3542
+	ssoReceiveHopLimit            // header field on received packet, RFC 2292 or 3542
+	ssoReceivePacketInfo          // incbound or outbound packet path, RFC 2292 or 3542
+	ssoReceivePathMTU             // path mtu, RFC 3542
+	ssoPathMTU                    // path mtu, RFC 3542
+	ssoChecksum                   // packet checksum, RFC 2292 or 3542
+	ssoICMPFilter                 // icmp filter, RFC 2292 or 3542
+	ssoJoinGroup                  // any-source multicast, RFC 3493
+	ssoLeaveGroup                 // any-source multicast, RFC 3493
+	ssoJoinSourceGroup            // source-specific multicast
+	ssoLeaveSourceGroup           // source-specific multicast
+	ssoBlockSourceGroup           // any-source or source-specific multicast
+	ssoUnblockSourceGroup         // any-source or source-specific multicast
+	ssoMax
+)
+
+// Sticky socket option value types
+const (
+	ssoTypeInt = iota + 1
+	ssoTypeInterface
+	ssoTypeICMPFilter
+	ssoTypeMTUInfo
+	ssoTypeIPMreq
+	ssoTypeGroupReq
+	ssoTypeGroupSourceReq
+)
+
+// A sockOpt represents a binding for sticky socket option.
+type sockOpt struct {
+	level int // option level
+	name  int // option name, must be equal or greater than 1
+	typ   int // option value type, must be equal or greater than 1
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_asmreq_posix.go b/vendor/golang.org/x/net/ipv6/sockopt_asmreq_posix.go
new file mode 100644
index 000000000..092e39839
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_asmreq_posix.go
@@ -0,0 +1,22 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd windows
+
+package ipv6
+
+import (
+	"net"
+	"os"
+	"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", setsockopt(s, opt.level, opt.name, unsafe.Pointer(&mreq), sysSizeofIPv6Mreq))
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_posix.go b/vendor/golang.org/x/net/ipv6/sockopt_posix.go
new file mode 100644
index 000000000..651aa9326
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_posix.go
@@ -0,0 +1,122 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux netbsd openbsd windows
+
+package ipv6
+
+import (
+	"net"
+	"os"
+	"unsafe"
+)
+
+func getInt(s uintptr, opt *sockOpt) (int, error) {
+	if opt.name < 1 || opt.typ != ssoTypeInt {
+		return 0, errOpNoSupport
+	}
+	var i int32
+	l := uint32(4)
+	if err := getsockopt(s, opt.level, opt.name, 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", setsockopt(s, opt.level, opt.name, 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 := uint32(4)
+	if err := getsockopt(s, opt.level, opt.name, 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", setsockopt(s, opt.level, opt.name, unsafe.Pointer(&i), 4))
+}
+
+func getICMPFilter(s uintptr, opt *sockOpt) (*ICMPFilter, error) {
+	if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
+		return nil, errOpNoSupport
+	}
+	var f ICMPFilter
+	l := uint32(sysSizeofICMPv6Filter)
+	if err := getsockopt(s, opt.level, opt.name, unsafe.Pointer(&f.sysICMPv6Filter), &l); err != nil {
+		return nil, os.NewSyscallError("getsockopt", err)
+	}
+	return &f, nil
+}
+
+func setICMPFilter(s uintptr, opt *sockOpt, f *ICMPFilter) error {
+	if opt.name < 1 || opt.typ != ssoTypeICMPFilter {
+		return errOpNoSupport
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, opt.level, opt.name, unsafe.Pointer(&f.sysICMPv6Filter), sysSizeofICMPv6Filter))
+}
+
+func getMTUInfo(s uintptr, opt *sockOpt) (*net.Interface, int, error) {
+	if opt.name < 1 || opt.typ != ssoTypeMTUInfo {
+		return nil, 0, errOpNoSupport
+	}
+	var mi sysIPv6Mtuinfo
+	l := uint32(sysSizeofIPv6Mtuinfo)
+	if err := getsockopt(s, opt.level, opt.name, unsafe.Pointer(&mi), &l); err != nil {
+		return nil, 0, os.NewSyscallError("getsockopt", err)
+	}
+	if mi.Addr.Scope_id == 0 {
+		return nil, int(mi.Mtu), nil
+	}
+	ifi, err := net.InterfaceByIndex(int(mi.Addr.Scope_id))
+	if err != nil {
+		return nil, 0, err
+	}
+	return ifi, int(mi.Mtu), nil
+}
+
+func setGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
+	if opt.name < 1 {
+		return errOpNoSupport
+	}
+	switch opt.typ {
+	case ssoTypeIPMreq:
+		return setsockoptIPMreq(s, opt, ifi, grp)
+	case ssoTypeGroupReq:
+		return setsockoptGroupReq(s, opt, ifi, grp)
+	default:
+		return errOpNoSupport
+	}
+}
+
+func setSourceGroup(s uintptr, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
+	if opt.name < 1 || opt.typ != ssoTypeGroupSourceReq {
+		return errOpNoSupport
+	}
+	return setsockoptGroupSourceReq(s, opt, ifi, grp, src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_ssmreq_stub.go b/vendor/golang.org/x/net/ipv6/sockopt_ssmreq_stub.go
new file mode 100644
index 000000000..a17723265
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_ssmreq_stub.go
@@ -0,0 +1,17 @@
+// 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 !darwin,!freebsd,!linux
+
+package ipv6
+
+import "net"
+
+func setsockoptGroupReq(s uintptr, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
+	return errOpNoSupport
+}
+
+func setsockoptGroupSourceReq(s uintptr, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
+	return errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_ssmreq_unix.go b/vendor/golang.org/x/net/ipv6/sockopt_ssmreq_unix.go
new file mode 100644
index 000000000..88f118ca2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_ssmreq_unix.go
@@ -0,0 +1,59 @@
+// 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 darwin freebsd linux
+
+package ipv6
+
+import (
+	"net"
+	"os"
+	"unsafe"
+)
+
+var freebsd32o64 bool
+
+func setsockoptGroupReq(s uintptr, opt *sockOpt, ifi *net.Interface, grp net.IP) error {
+	var gr sysGroupReq
+	if ifi != nil {
+		gr.Interface = uint32(ifi.Index)
+	}
+	gr.setGroup(grp)
+	var p unsafe.Pointer
+	var l uint32
+	if freebsd32o64 {
+		var d [sysSizeofGroupReq + 4]byte
+		s := (*[sysSizeofGroupReq]byte)(unsafe.Pointer(&gr))
+		copy(d[:4], s[:4])
+		copy(d[8:], s[4:])
+		p = unsafe.Pointer(&d[0])
+		l = sysSizeofGroupReq + 4
+	} else {
+		p = unsafe.Pointer(&gr)
+		l = sysSizeofGroupReq
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, opt.level, opt.name, p, l))
+}
+
+func setsockoptGroupSourceReq(s uintptr, opt *sockOpt, ifi *net.Interface, grp, src net.IP) error {
+	var gsr sysGroupSourceReq
+	if ifi != nil {
+		gsr.Interface = uint32(ifi.Index)
+	}
+	gsr.setSourceGroup(grp, src)
+	var p unsafe.Pointer
+	var l uint32
+	if freebsd32o64 {
+		var d [sysSizeofGroupSourceReq + 4]byte
+		s := (*[sysSizeofGroupSourceReq]byte)(unsafe.Pointer(&gsr))
+		copy(d[:4], s[:4])
+		copy(d[8:], s[4:])
+		p = unsafe.Pointer(&d[0])
+		l = sysSizeofGroupSourceReq + 4
+	} else {
+		p = unsafe.Pointer(&gsr)
+		l = sysSizeofGroupSourceReq
+	}
+	return os.NewSyscallError("setsockopt", setsockopt(s, opt.level, opt.name, p, l))
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_stub.go b/vendor/golang.org/x/net/ipv6/sockopt_stub.go
new file mode 100644
index 000000000..b6b9c4b45
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_stub.go
@@ -0,0 +1,13 @@
+// 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.
+
+// +build nacl plan9 solaris
+
+package ipv6
+
+import "net"
+
+func getMTUInfo(s uintptr, opt *sockOpt) (*net.Interface, int, error) {
+	return nil, 0, errOpNoSupport
+}
diff --git a/vendor/golang.org/x/net/ipv6/sockopt_test.go b/vendor/golang.org/x/net/ipv6/sockopt_test.go
new file mode 100644
index 000000000..9c2190316
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sockopt_test.go
@@ -0,0 +1,133 @@
+// 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_test
+
+import (
+	"fmt"
+	"net"
+	"runtime"
+	"testing"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+var supportsIPv6 bool = nettest.SupportsIPv6()
+
+func TestConnInitiatorPathMTU(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	ln, err := net.Listen("tcp6", "[::1]:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ln.Close()
+
+	done := make(chan bool)
+	go acceptor(t, ln, done)
+
+	c, err := net.Dial("tcp6", ln.Addr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	if pmtu, err := ipv6.NewConn(c).PathMTU(); err != nil {
+		switch runtime.GOOS {
+		case "darwin": // older darwin kernels don't support IPV6_PATHMTU option
+			t.Logf("not supported on %s", runtime.GOOS)
+		default:
+			t.Fatal(err)
+		}
+	} else {
+		t.Logf("path mtu for %v: %v", c.RemoteAddr(), pmtu)
+	}
+
+	<-done
+}
+
+func TestConnResponderPathMTU(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	ln, err := net.Listen("tcp6", "[::1]:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ln.Close()
+
+	done := make(chan bool)
+	go connector(t, "tcp6", ln.Addr().String(), done)
+
+	c, err := ln.Accept()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	if pmtu, err := ipv6.NewConn(c).PathMTU(); err != nil {
+		switch runtime.GOOS {
+		case "darwin": // older darwin kernels don't support IPV6_PATHMTU option
+			t.Logf("not supported on %s", runtime.GOOS)
+		default:
+			t.Fatal(err)
+		}
+	} else {
+		t.Logf("path mtu for %v: %v", c.RemoteAddr(), pmtu)
+	}
+
+	<-done
+}
+
+func TestPacketConnChecksum(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	if m, ok := nettest.SupportsRawIPSocket(); !ok {
+		t.Skip(m)
+	}
+
+	c, err := net.ListenPacket(fmt.Sprintf("ip6:%d", iana.ProtocolOSPFIGP), "::") // OSPF for IPv6
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	p := ipv6.NewPacketConn(c)
+	offset := 12 // see RFC 5340
+
+	for _, toggle := range []bool{false, true} {
+		if err := p.SetChecksum(toggle, offset); err != nil {
+			if toggle {
+				t.Fatalf("ipv6.PacketConn.SetChecksum(%v, %v) failed: %v", toggle, offset, err)
+			} else {
+				// Some platforms never allow to disable the kernel
+				// checksum processing.
+				t.Logf("ipv6.PacketConn.SetChecksum(%v, %v) failed: %v", toggle, offset, err)
+			}
+		}
+		if on, offset, err := p.Checksum(); err != nil {
+			t.Fatal(err)
+		} else {
+			t.Logf("kernel checksum processing enabled=%v, offset=%v", on, offset)
+		}
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_bsd.go b/vendor/golang.org/x/net/ipv6/sys_bsd.go
new file mode 100644
index 000000000..0ee43e6d2
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_bsd.go
@@ -0,0 +1,56 @@
+// 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.
+
+// +build dragonfly netbsd openbsd
+
+package ipv6
+
+import (
+	"net"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sysSizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlNextHop:      {sysIPV6_NEXTHOP, sysSizeofSockaddrInet6, marshalNextHop, parseNextHop},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sysSizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = [ssoMax]sockOpt{
+		ssoTrafficClass:        {iana.ProtocolIPv6, sysIPV6_TCLASS, ssoTypeInt},
+		ssoHopLimit:            {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
+		ssoMulticastInterface:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
+		ssoMulticastHopLimit:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
+		ssoMulticastLoopback:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
+		ssoReceiveTrafficClass: {iana.ProtocolIPv6, sysIPV6_RECVTCLASS, ssoTypeInt},
+		ssoReceiveHopLimit:     {iana.ProtocolIPv6, sysIPV6_RECVHOPLIMIT, ssoTypeInt},
+		ssoReceivePacketInfo:   {iana.ProtocolIPv6, sysIPV6_RECVPKTINFO, ssoTypeInt},
+		ssoReceivePathMTU:      {iana.ProtocolIPv6, sysIPV6_RECVPATHMTU, ssoTypeInt},
+		ssoPathMTU:             {iana.ProtocolIPv6, sysIPV6_PATHMTU, ssoTypeMTUInfo},
+		ssoChecksum:            {iana.ProtocolIPv6, sysIPV6_CHECKSUM, ssoTypeInt},
+		ssoICMPFilter:          {iana.ProtocolIPv6ICMP, sysICMP6_FILTER, ssoTypeICMPFilter},
+		ssoJoinGroup:           {iana.ProtocolIPv6, sysIPV6_JOIN_GROUP, ssoTypeIPMreq},
+		ssoLeaveGroup:          {iana.ProtocolIPv6, sysIPV6_LEAVE_GROUP, ssoTypeIPMreq},
+	}
+)
+
+func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *sysInet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *sysIPv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_darwin.go b/vendor/golang.org/x/net/ipv6/sys_darwin.go
new file mode 100644
index 000000000..1e1c4aefa
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_darwin.go
@@ -0,0 +1,105 @@
+// 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"
+	"strconv"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlHopLimit:   {sysIPV6_2292HOPLIMIT, 4, marshal2292HopLimit, parseHopLimit},
+		ctlPacketInfo: {sysIPV6_2292PKTINFO, sysSizeofInet6Pktinfo, marshal2292PacketInfo, parsePacketInfo},
+	}
+
+	sockOpts = [ssoMax]sockOpt{
+		ssoHopLimit:           {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
+		ssoMulticastInterface: {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
+		ssoMulticastHopLimit:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
+		ssoMulticastLoopback:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
+		ssoReceiveHopLimit:    {iana.ProtocolIPv6, sysIPV6_2292HOPLIMIT, ssoTypeInt},
+		ssoReceivePacketInfo:  {iana.ProtocolIPv6, sysIPV6_2292PKTINFO, ssoTypeInt},
+		ssoChecksum:           {iana.ProtocolIPv6, sysIPV6_CHECKSUM, ssoTypeInt},
+		ssoICMPFilter:         {iana.ProtocolIPv6ICMP, sysICMP6_FILTER, ssoTypeICMPFilter},
+		ssoJoinGroup:          {iana.ProtocolIPv6, sysIPV6_JOIN_GROUP, ssoTypeIPMreq},
+		ssoLeaveGroup:         {iana.ProtocolIPv6, sysIPV6_LEAVE_GROUP, ssoTypeIPMreq},
+	}
+)
+
+func init() {
+	// Seems like kern.osreldate is veiled on latest OS X. We use
+	// kern.osrelease instead.
+	s, err := syscall.Sysctl("kern.osrelease")
+	if err != nil {
+		return
+	}
+	ss := strings.Split(s, ".")
+	if len(ss) == 0 {
+		return
+	}
+	// The IP_PKTINFO and protocol-independent multicast API were
+	// introduced in OS X 10.7 (Darwin 11). But it looks like
+	// those features require OS X 10.8 (Darwin 12) or above.
+	// See http://support.apple.com/kb/HT1633.
+	if mjver, err := strconv.Atoi(ss[0]); err != nil || mjver < 12 {
+		return
+	}
+	ctlOpts[ctlTrafficClass] = ctlOpt{sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass}
+	ctlOpts[ctlHopLimit] = ctlOpt{sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit}
+	ctlOpts[ctlPacketInfo] = ctlOpt{sysIPV6_PKTINFO, sysSizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo}
+	ctlOpts[ctlNextHop] = ctlOpt{sysIPV6_NEXTHOP, sysSizeofSockaddrInet6, marshalNextHop, parseNextHop}
+	ctlOpts[ctlPathMTU] = ctlOpt{sysIPV6_PATHMTU, sysSizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU}
+	sockOpts[ssoTrafficClass] = sockOpt{iana.ProtocolIPv6, sysIPV6_TCLASS, ssoTypeInt}
+	sockOpts[ssoReceiveTrafficClass] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVTCLASS, ssoTypeInt}
+	sockOpts[ssoReceiveHopLimit] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVHOPLIMIT, ssoTypeInt}
+	sockOpts[ssoReceivePacketInfo] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVPKTINFO, ssoTypeInt}
+	sockOpts[ssoReceivePathMTU] = sockOpt{iana.ProtocolIPv6, sysIPV6_RECVPATHMTU, ssoTypeInt}
+	sockOpts[ssoPathMTU] = sockOpt{iana.ProtocolIPv6, sysIPV6_PATHMTU, ssoTypeMTUInfo}
+	sockOpts[ssoJoinGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_JOIN_GROUP, ssoTypeGroupReq}
+	sockOpts[ssoLeaveGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_LEAVE_GROUP, ssoTypeGroupReq}
+	sockOpts[ssoJoinSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq}
+	sockOpts[ssoLeaveSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq}
+	sockOpts[ssoBlockSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq}
+	sockOpts[ssoUnblockSourceGroup] = sockOpt{iana.ProtocolIPv6, sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq}
+}
+
+func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *sysInet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *sysIPv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
+
+func (gr *sysGroupReq) setGroup(grp net.IP) {
+	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Pad_cgo_0[0]))
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_0[0]))
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Pad_cgo_1[0]))
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_freebsd.go b/vendor/golang.org/x/net/ipv6/sys_freebsd.go
new file mode 100644
index 000000000..5527001f1
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_freebsd.go
@@ -0,0 +1,91 @@
+// 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"
+	"runtime"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sysSizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlNextHop:      {sysIPV6_NEXTHOP, sysSizeofSockaddrInet6, marshalNextHop, parseNextHop},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sysSizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = [ssoMax]sockOpt{
+		ssoTrafficClass:        {iana.ProtocolIPv6, sysIPV6_TCLASS, ssoTypeInt},
+		ssoHopLimit:            {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
+		ssoMulticastInterface:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
+		ssoMulticastHopLimit:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
+		ssoMulticastLoopback:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
+		ssoReceiveTrafficClass: {iana.ProtocolIPv6, sysIPV6_RECVTCLASS, ssoTypeInt},
+		ssoReceiveHopLimit:     {iana.ProtocolIPv6, sysIPV6_RECVHOPLIMIT, ssoTypeInt},
+		ssoReceivePacketInfo:   {iana.ProtocolIPv6, sysIPV6_RECVPKTINFO, ssoTypeInt},
+		ssoReceivePathMTU:      {iana.ProtocolIPv6, sysIPV6_RECVPATHMTU, ssoTypeInt},
+		ssoPathMTU:             {iana.ProtocolIPv6, sysIPV6_PATHMTU, ssoTypeMTUInfo},
+		ssoChecksum:            {iana.ProtocolIPv6, sysIPV6_CHECKSUM, ssoTypeInt},
+		ssoICMPFilter:          {iana.ProtocolIPv6ICMP, sysICMP6_FILTER, ssoTypeICMPFilter},
+		ssoJoinGroup:           {iana.ProtocolIPv6, sysMCAST_JOIN_GROUP, ssoTypeGroupReq},
+		ssoLeaveGroup:          {iana.ProtocolIPv6, sysMCAST_LEAVE_GROUP, ssoTypeGroupReq},
+		ssoJoinSourceGroup:     {iana.ProtocolIPv6, sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:    {iana.ProtocolIPv6, sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:    {iana.ProtocolIPv6, sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup:  {iana.ProtocolIPv6, sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq},
+	}
+)
+
+func init() {
+	if runtime.GOOS == "freebsd" && runtime.GOARCH == "386" {
+		archs, _ := syscall.Sysctl("kern.supported_archs")
+		for _, s := range strings.Fields(archs) {
+			if s == "amd64" {
+				freebsd32o64 = true
+				break
+			}
+		}
+	}
+}
+
+func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *sysInet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = uint32(i)
+}
+
+func (mreq *sysIPv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
+
+func (gr *sysGroupReq) setGroup(grp net.IP) {
+	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Group))
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Group))
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Source))
+	sa.Len = sysSizeofSockaddrInet6
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_linux.go b/vendor/golang.org/x/net/ipv6/sys_linux.go
new file mode 100644
index 000000000..fd7d5b188
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_linux.go
@@ -0,0 +1,72 @@
+// 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"
+	"syscall"
+	"unsafe"
+
+	"golang.org/x/net/internal/iana"
+)
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{
+		ctlTrafficClass: {sysIPV6_TCLASS, 4, marshalTrafficClass, parseTrafficClass},
+		ctlHopLimit:     {sysIPV6_HOPLIMIT, 4, marshalHopLimit, parseHopLimit},
+		ctlPacketInfo:   {sysIPV6_PKTINFO, sysSizeofInet6Pktinfo, marshalPacketInfo, parsePacketInfo},
+		ctlPathMTU:      {sysIPV6_PATHMTU, sysSizeofIPv6Mtuinfo, marshalPathMTU, parsePathMTU},
+	}
+
+	sockOpts = [ssoMax]sockOpt{
+		ssoTrafficClass:        {iana.ProtocolIPv6, sysIPV6_TCLASS, ssoTypeInt},
+		ssoHopLimit:            {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
+		ssoMulticastInterface:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
+		ssoMulticastHopLimit:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
+		ssoMulticastLoopback:   {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
+		ssoReceiveTrafficClass: {iana.ProtocolIPv6, sysIPV6_RECVTCLASS, ssoTypeInt},
+		ssoReceiveHopLimit:     {iana.ProtocolIPv6, sysIPV6_RECVHOPLIMIT, ssoTypeInt},
+		ssoReceivePacketInfo:   {iana.ProtocolIPv6, sysIPV6_RECVPKTINFO, ssoTypeInt},
+		ssoReceivePathMTU:      {iana.ProtocolIPv6, sysIPV6_RECVPATHMTU, ssoTypeInt},
+		ssoPathMTU:             {iana.ProtocolIPv6, sysIPV6_PATHMTU, ssoTypeMTUInfo},
+		ssoChecksum:            {iana.ProtocolReserved, sysIPV6_CHECKSUM, ssoTypeInt},
+		ssoICMPFilter:          {iana.ProtocolIPv6ICMP, sysICMPV6_FILTER, ssoTypeICMPFilter},
+		ssoJoinGroup:           {iana.ProtocolIPv6, sysMCAST_JOIN_GROUP, ssoTypeGroupReq},
+		ssoLeaveGroup:          {iana.ProtocolIPv6, sysMCAST_LEAVE_GROUP, ssoTypeGroupReq},
+		ssoJoinSourceGroup:     {iana.ProtocolIPv6, sysMCAST_JOIN_SOURCE_GROUP, ssoTypeGroupSourceReq},
+		ssoLeaveSourceGroup:    {iana.ProtocolIPv6, sysMCAST_LEAVE_SOURCE_GROUP, ssoTypeGroupSourceReq},
+		ssoBlockSourceGroup:    {iana.ProtocolIPv6, sysMCAST_BLOCK_SOURCE, ssoTypeGroupSourceReq},
+		ssoUnblockSourceGroup:  {iana.ProtocolIPv6, sysMCAST_UNBLOCK_SOURCE, ssoTypeGroupSourceReq},
+	}
+)
+
+func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (pi *sysInet6Pktinfo) setIfindex(i int) {
+	pi.Ifindex = int32(i)
+}
+
+func (mreq *sysIPv6Mreq) setIfindex(i int) {
+	mreq.Ifindex = int32(i)
+}
+
+func (gr *sysGroupReq) setGroup(grp net.IP) {
+	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gr.Group))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+}
+
+func (gsr *sysGroupSourceReq) setSourceGroup(grp, src net.IP) {
+	sa := (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Group))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], grp)
+	sa = (*sysSockaddrInet6)(unsafe.Pointer(&gsr.Source))
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], src)
+}
diff --git a/vendor/golang.org/x/net/ipv6/sys_stub.go b/vendor/golang.org/x/net/ipv6/sys_stub.go
new file mode 100644
index 000000000..ead0f4d11
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_stub.go
@@ -0,0 +1,13 @@
+// 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 nacl plan9 solaris
+
+package ipv6
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{}
+
+	sockOpts = [ssoMax]sockOpt{}
+)
diff --git a/vendor/golang.org/x/net/ipv6/sys_windows.go b/vendor/golang.org/x/net/ipv6/sys_windows.go
new file mode 100644
index 000000000..405190684
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/sys_windows.go
@@ -0,0 +1,74 @@
+// 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"
+	"syscall"
+
+	"golang.org/x/net/internal/iana"
+)
+
+const (
+	// See ws2tcpip.h.
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PKTINFO        = 0x13
+
+	sysSizeofSockaddrInet6 = 0x1c
+
+	sysSizeofIPv6Mreq     = 0x14
+	sysSizeofIPv6Mtuinfo  = 0x20
+	sysSizeofICMPv6Filter = 0
+)
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysICMPv6Filter struct {
+	// TODO(mikio): implement this
+}
+
+var (
+	ctlOpts = [ctlMax]ctlOpt{}
+
+	sockOpts = [ssoMax]sockOpt{
+		ssoHopLimit:           {iana.ProtocolIPv6, sysIPV6_UNICAST_HOPS, ssoTypeInt},
+		ssoMulticastInterface: {iana.ProtocolIPv6, sysIPV6_MULTICAST_IF, ssoTypeInterface},
+		ssoMulticastHopLimit:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_HOPS, ssoTypeInt},
+		ssoMulticastLoopback:  {iana.ProtocolIPv6, sysIPV6_MULTICAST_LOOP, ssoTypeInt},
+		ssoJoinGroup:          {iana.ProtocolIPv6, sysIPV6_JOIN_GROUP, ssoTypeIPMreq},
+		ssoLeaveGroup:         {iana.ProtocolIPv6, sysIPV6_LEAVE_GROUP, ssoTypeIPMreq},
+	}
+)
+
+func (sa *sysSockaddrInet6) setSockaddr(ip net.IP, i int) {
+	sa.Family = syscall.AF_INET6
+	copy(sa.Addr[:], ip)
+	sa.Scope_id = uint32(i)
+}
+
+func (mreq *sysIPv6Mreq) setIfindex(i int) {
+	mreq.Interface = uint32(i)
+}
diff --git a/vendor/golang.org/x/net/ipv6/syscall_linux_386.go b/vendor/golang.org/x/net/ipv6/syscall_linux_386.go
new file mode 100644
index 000000000..5184dbe88
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/syscall_linux_386.go
@@ -0,0 +1,31 @@
+// Copyright 2009 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"
+)
+
+const (
+	sysGETSOCKOPT = 0xf
+	sysSETSOCKOPT = 0xe
+)
+
+func socketcall(call int, a0, a1, a2, a3, a4, a5 uintptr) (int, syscall.Errno)
+
+func getsockopt(s uintptr, level, name int, v unsafe.Pointer, l *uint32) error {
+	if _, errno := socketcall(sysGETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(v), uintptr(unsafe.Pointer(l)), 0); errno != 0 {
+		return error(errno)
+	}
+	return nil
+}
+
+func setsockopt(s uintptr, level, name int, v unsafe.Pointer, l uint32) error {
+	if _, errno := socketcall(sysSETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(v), uintptr(l), 0); errno != 0 {
+		return error(errno)
+	}
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/syscall_unix.go b/vendor/golang.org/x/net/ipv6/syscall_unix.go
new file mode 100644
index 000000000..52eb9bd79
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/syscall_unix.go
@@ -0,0 +1,26 @@
+// 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.
+
+// +build darwin dragonfly freebsd linux,!386 netbsd openbsd
+
+package ipv6
+
+import (
+	"syscall"
+	"unsafe"
+)
+
+func getsockopt(s uintptr, level, name int, v unsafe.Pointer, l *uint32) error {
+	if _, _, errno := syscall.Syscall6(syscall.SYS_GETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(v), uintptr(unsafe.Pointer(l)), 0); errno != 0 {
+		return error(errno)
+	}
+	return nil
+}
+
+func setsockopt(s uintptr, level, name int, v unsafe.Pointer, l uint32) error {
+	if _, _, errno := syscall.Syscall6(syscall.SYS_SETSOCKOPT, s, uintptr(level), uintptr(name), uintptr(v), uintptr(l), 0); errno != 0 {
+		return error(errno)
+	}
+	return nil
+}
diff --git a/vendor/golang.org/x/net/ipv6/syscall_windows.go b/vendor/golang.org/x/net/ipv6/syscall_windows.go
new file mode 100644
index 000000000..c1f649d38
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/syscall_windows.go
@@ -0,0 +1,18 @@
+// 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))
+}
diff --git a/vendor/golang.org/x/net/ipv6/thunk_linux_386.s b/vendor/golang.org/x/net/ipv6/thunk_linux_386.s
new file mode 100644
index 000000000..daa78bc02
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/thunk_linux_386.s
@@ -0,0 +1,8 @@
+// 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 go1.2
+
+TEXT	·socketcall(SB),4,$0-36
+	JMP	syscall·socketcall(SB)
diff --git a/vendor/golang.org/x/net/ipv6/unicast_test.go b/vendor/golang.org/x/net/ipv6/unicast_test.go
new file mode 100644
index 000000000..db5b08a28
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/unicast_test.go
@@ -0,0 +1,182 @@
+// 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_test
+
+import (
+	"bytes"
+	"net"
+	"os"
+	"runtime"
+	"testing"
+	"time"
+
+	"golang.org/x/net/icmp"
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+func TestPacketConnReadWriteUnicastUDP(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	c, err := net.ListenPacket("udp6", "[::1]:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv6.NewPacketConn(c)
+	defer p.Close()
+
+	dst, err := net.ResolveUDPAddr("udp6", c.LocalAddr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	cm := ipv6.ControlMessage{
+		TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
+		Src:          net.IPv6loopback,
+	}
+	cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
+	if ifi != nil {
+		cm.IfIndex = ifi.Index
+	}
+	wb := []byte("HELLO-R-U-THERE")
+
+	for i, toggle := range []bool{true, false, true} {
+		if err := p.SetControlMessage(cf, toggle); err != nil {
+			if nettest.ProtocolNotSupported(err) {
+				t.Skipf("not supported on %s", runtime.GOOS)
+			}
+			t.Fatal(err)
+		}
+		cm.HopLimit = i + 1
+		if err := p.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
+			t.Fatal(err)
+		}
+		if n, err := p.WriteTo(wb, &cm, dst); err != nil {
+			t.Fatal(err)
+		} else if n != len(wb) {
+			t.Fatalf("got %v; want %v", n, len(wb))
+		}
+		rb := make([]byte, 128)
+		if err := p.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
+			t.Fatal(err)
+		}
+		if n, _, _, err := p.ReadFrom(rb); err != nil {
+			t.Fatal(err)
+		} else if !bytes.Equal(rb[:n], wb) {
+			t.Fatalf("got %v; want %v", rb[:n], wb)
+		}
+	}
+}
+
+func TestPacketConnReadWriteUnicastICMP(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+	if m, ok := nettest.SupportsRawIPSocket(); !ok {
+		t.Skip(m)
+	}
+
+	c, err := net.ListenPacket("ip6:ipv6-icmp", "::1")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+	p := ipv6.NewPacketConn(c)
+	defer p.Close()
+
+	dst, err := net.ResolveIPAddr("ip6", "::1")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	pshicmp := icmp.IPv6PseudoHeader(c.LocalAddr().(*net.IPAddr).IP, dst.IP)
+	cm := ipv6.ControlMessage{
+		TrafficClass: iana.DiffServAF11 | iana.CongestionExperienced,
+		Src:          net.IPv6loopback,
+	}
+	cf := ipv6.FlagTrafficClass | ipv6.FlagHopLimit | ipv6.FlagSrc | ipv6.FlagDst | ipv6.FlagInterface | ipv6.FlagPathMTU
+	ifi := nettest.RoutedInterface("ip6", net.FlagUp|net.FlagLoopback)
+	if ifi != nil {
+		cm.IfIndex = ifi.Index
+	}
+
+	var f ipv6.ICMPFilter
+	f.SetAll(true)
+	f.Accept(ipv6.ICMPTypeEchoReply)
+	if err := p.SetICMPFilter(&f); err != nil {
+		t.Fatal(err)
+	}
+
+	var psh []byte
+	for i, toggle := range []bool{true, false, true} {
+		if toggle {
+			psh = nil
+			if err := p.SetChecksum(true, 2); err != nil {
+				t.Fatal(err)
+			}
+		} else {
+			psh = pshicmp
+			// Some platforms never allow to disable the
+			// kernel checksum processing.
+			p.SetChecksum(false, -1)
+		}
+		wb, err := (&icmp.Message{
+			Type: ipv6.ICMPTypeEchoRequest, Code: 0,
+			Body: &icmp.Echo{
+				ID: os.Getpid() & 0xffff, Seq: i + 1,
+				Data: []byte("HELLO-R-U-THERE"),
+			},
+		}).Marshal(psh)
+		if err != nil {
+			t.Fatal(err)
+		}
+		if err := p.SetControlMessage(cf, toggle); err != nil {
+			if nettest.ProtocolNotSupported(err) {
+				t.Skipf("not supported on %s", runtime.GOOS)
+			}
+			t.Fatal(err)
+		}
+		cm.HopLimit = i + 1
+		if err := p.SetWriteDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
+			t.Fatal(err)
+		}
+		if n, err := p.WriteTo(wb, &cm, dst); err != nil {
+			t.Fatal(err)
+		} else if n != len(wb) {
+			t.Fatalf("got %v; want %v", n, len(wb))
+		}
+		rb := make([]byte, 128)
+		if err := p.SetReadDeadline(time.Now().Add(100 * time.Millisecond)); err != nil {
+			t.Fatal(err)
+		}
+		if n, _, _, err := p.ReadFrom(rb); err != nil {
+			switch runtime.GOOS {
+			case "darwin": // older darwin kernels have some limitation on receiving icmp packet through raw socket
+				t.Logf("not supported on %s", runtime.GOOS)
+				continue
+			}
+			t.Fatal(err)
+		} else {
+			if m, err := icmp.ParseMessage(iana.ProtocolIPv6ICMP, rb[:n]); err != nil {
+				t.Fatal(err)
+			} else if m.Type != ipv6.ICMPTypeEchoReply || m.Code != 0 {
+				t.Fatalf("got type=%v, code=%v; want type=%v, code=%v", m.Type, m.Code, ipv6.ICMPTypeEchoReply, 0)
+			}
+		}
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/unicastsockopt_test.go b/vendor/golang.org/x/net/ipv6/unicastsockopt_test.go
new file mode 100644
index 000000000..7bb2e440a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/unicastsockopt_test.go
@@ -0,0 +1,111 @@
+// 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_test
+
+import (
+	"net"
+	"runtime"
+	"testing"
+
+	"golang.org/x/net/internal/iana"
+	"golang.org/x/net/internal/nettest"
+	"golang.org/x/net/ipv6"
+)
+
+func TestConnUnicastSocketOptions(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	ln, err := net.Listen("tcp6", "[::1]:0")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer ln.Close()
+
+	done := make(chan bool)
+	go acceptor(t, ln, done)
+
+	c, err := net.Dial("tcp6", ln.Addr().String())
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer c.Close()
+
+	testUnicastSocketOptions(t, ipv6.NewConn(c))
+
+	<-done
+}
+
+var packetConnUnicastSocketOptionTests = []struct {
+	net, proto, addr string
+}{
+	{"udp6", "", "[::1]:0"},
+	{"ip6", ":ipv6-icmp", "::1"},
+}
+
+func TestPacketConnUnicastSocketOptions(t *testing.T) {
+	switch runtime.GOOS {
+	case "nacl", "plan9", "solaris", "windows":
+		t.Skipf("not supported on %s", runtime.GOOS)
+	}
+	if !supportsIPv6 {
+		t.Skip("ipv6 is not supported")
+	}
+
+	m, ok := nettest.SupportsRawIPSocket()
+	for _, tt := range packetConnUnicastSocketOptionTests {
+		if tt.net == "ip6" && !ok {
+			t.Log(m)
+			continue
+		}
+		c, err := net.ListenPacket(tt.net+tt.proto, tt.addr)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c.Close()
+
+		testUnicastSocketOptions(t, ipv6.NewPacketConn(c))
+	}
+}
+
+type testIPv6UnicastConn interface {
+	TrafficClass() (int, error)
+	SetTrafficClass(int) error
+	HopLimit() (int, error)
+	SetHopLimit(int) error
+}
+
+func testUnicastSocketOptions(t *testing.T, c testIPv6UnicastConn) {
+	tclass := iana.DiffServCS0 | iana.NotECNTransport
+	if err := c.SetTrafficClass(tclass); err != nil {
+		switch runtime.GOOS {
+		case "darwin": // older darwin kernels don't support IPV6_TCLASS option
+			t.Logf("not supported on %s", runtime.GOOS)
+			goto next
+		}
+		t.Fatal(err)
+	}
+	if v, err := c.TrafficClass(); err != nil {
+		t.Fatal(err)
+	} else if v != tclass {
+		t.Fatalf("got %v; want %v", v, tclass)
+	}
+
+next:
+	hoplim := 255
+	if err := c.SetHopLimit(hoplim); err != nil {
+		t.Fatal(err)
+	}
+	if v, err := c.HopLimit(); err != nil {
+		t.Fatal(err)
+	} else if v != hoplim {
+		t.Fatalf("got %v; want %v", v, hoplim)
+	}
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_darwin.go b/vendor/golang.org/x/net/ipv6/zsys_darwin.go
new file mode 100644
index 000000000..cb044b033
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_darwin.go
@@ -0,0 +1,131 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_darwin.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+
+	sysIPV6_PORTRANGE    = 0xe
+	sysICMP6_FILTER      = 0x12
+	sysIPV6_2292PKTINFO  = 0x13
+	sysIPV6_2292HOPLIMIT = 0x14
+	sysIPV6_2292NEXTHOP  = 0x15
+	sysIPV6_2292HOPOPTS  = 0x16
+	sysIPV6_2292DSTOPTS  = 0x17
+	sysIPV6_2292RTHDR    = 0x18
+
+	sysIPV6_2292PKTOPTIONS = 0x19
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RECVTCLASS = 0x23
+	sysIPV6_TCLASS     = 0x24
+
+	sysIPV6_RTHDRDSTOPTS = 0x39
+
+	sysIPV6_RECVPKTINFO = 0x3d
+
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_MSFILTER            = 0x4a
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_BOUND_IF = 0x7d
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6   = 0x1c
+	sysSizeofInet6Pktinfo    = 0x14
+	sysSizeofIPv6Mtuinfo     = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x84
+	sysSizeofGroupSourceReq = 0x104
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [128]byte
+	Pad_cgo_1 [128]byte
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_dragonfly.go b/vendor/golang.org/x/net/ipv6/zsys_dragonfly.go
new file mode 100644
index 000000000..5a03ab734
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_dragonfly.go
@@ -0,0 +1,90 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_dragonfly.go
+
+// +build dragonfly
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrInet6 = 0x1c
+	sysSizeofInet6Pktinfo  = 0x14
+	sysSizeofIPv6Mtuinfo   = 0x20
+
+	sysSizeofIPv6Mreq = 0x14
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_freebsd_386.go b/vendor/golang.org/x/net/ipv6/zsys_freebsd_386.go
new file mode 100644
index 000000000..4ace96f0c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_freebsd_386.go
@@ -0,0 +1,122 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_BINDANY = 0x40
+
+	sysIPV6_MSFILTER = 0x4a
+
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6   = 0x1c
+	sysSizeofInet6Pktinfo    = 0x14
+	sysSizeofIPv6Mtuinfo     = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x84
+	sysSizeofGroupSourceReq = 0x104
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Group     sysSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Group     sysSockaddrStorage
+	Source    sysSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_freebsd_amd64.go b/vendor/golang.org/x/net/ipv6/zsys_freebsd_amd64.go
new file mode 100644
index 000000000..4a62c2d5c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_freebsd_amd64.go
@@ -0,0 +1,124 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_BINDANY = 0x40
+
+	sysIPV6_MSFILTER = 0x4a
+
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6   = 0x1c
+	sysSizeofInet6Pktinfo    = 0x14
+	sysSizeofIPv6Mtuinfo     = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysSockaddrStorage
+	Source    sysSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_freebsd_arm.go b/vendor/golang.org/x/net/ipv6/zsys_freebsd_arm.go
new file mode 100644
index 000000000..4a62c2d5c
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_freebsd_arm.go
@@ -0,0 +1,124 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_freebsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PREFER_TEMPADDR = 0x3f
+
+	sysIPV6_BINDANY = 0x40
+
+	sysIPV6_MSFILTER = 0x4a
+
+	sysMCAST_JOIN_GROUP         = 0x50
+	sysMCAST_LEAVE_GROUP        = 0x51
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x52
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x53
+	sysMCAST_BLOCK_SOURCE       = 0x54
+	sysMCAST_UNBLOCK_SOURCE     = 0x55
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6   = 0x1c
+	sysSizeofInet6Pktinfo    = 0x14
+	sysSizeofIPv6Mtuinfo     = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrStorage struct {
+	Len         uint8
+	Family      uint8
+	X__ss_pad1  [6]int8
+	X__ss_align int64
+	X__ss_pad2  [112]int8
+}
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysSockaddrStorage
+	Source    sysSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_386.go b/vendor/golang.org/x/net/ipv6/zsys_linux_386.go
new file mode 100644
index 000000000..36fccbb62
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_386.go
@@ -0,0 +1,168 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x84
+	sysSizeofGroupSourceReq = 0x104
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_amd64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_amd64.go
new file mode 100644
index 000000000..7461e7e03
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_amd64.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_arm.go b/vendor/golang.org/x/net/ipv6/zsys_linux_arm.go
new file mode 100644
index 000000000..36fccbb62
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_arm.go
@@ -0,0 +1,168 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x84
+	sysSizeofGroupSourceReq = 0x104
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_arm64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_arm64.go
new file mode 100644
index 000000000..ed35f6039
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_arm64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,arm64
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_mips64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64.go
new file mode 100644
index 000000000..141c86977
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,mips64
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_mips64le.go b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64le.go
new file mode 100644
index 000000000..d50eb633e
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_mips64le.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,mips64le
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_ppc.go b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc.go
new file mode 100644
index 000000000..4c58ea67d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc.go
@@ -0,0 +1,170 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,ppc
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x84
+	sysSizeofGroupSourceReq = 0x104
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]uint8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [2]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64.go b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64.go
new file mode 100644
index 000000000..c1d775f77
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,ppc64
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64le.go b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64le.go
new file mode 100644
index 000000000..e385fb7aa
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_ppc64le.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,ppc64le
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_linux_s390x.go b/vendor/golang.org/x/net/ipv6/zsys_linux_s390x.go
new file mode 100644
index 000000000..28d69b1b0
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_linux_s390x.go
@@ -0,0 +1,172 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_linux.go
+
+// +build linux,s390x
+
+package ipv6
+
+const (
+	sysIPV6_ADDRFORM       = 0x1
+	sysIPV6_2292PKTINFO    = 0x2
+	sysIPV6_2292HOPOPTS    = 0x3
+	sysIPV6_2292DSTOPTS    = 0x4
+	sysIPV6_2292RTHDR      = 0x5
+	sysIPV6_2292PKTOPTIONS = 0x6
+	sysIPV6_CHECKSUM       = 0x7
+	sysIPV6_2292HOPLIMIT   = 0x8
+	sysIPV6_NEXTHOP        = 0x9
+	sysIPV6_FLOWINFO       = 0xb
+
+	sysIPV6_UNICAST_HOPS        = 0x10
+	sysIPV6_MULTICAST_IF        = 0x11
+	sysIPV6_MULTICAST_HOPS      = 0x12
+	sysIPV6_MULTICAST_LOOP      = 0x13
+	sysIPV6_ADD_MEMBERSHIP      = 0x14
+	sysIPV6_DROP_MEMBERSHIP     = 0x15
+	sysMCAST_JOIN_GROUP         = 0x2a
+	sysMCAST_LEAVE_GROUP        = 0x2d
+	sysMCAST_JOIN_SOURCE_GROUP  = 0x2e
+	sysMCAST_LEAVE_SOURCE_GROUP = 0x2f
+	sysMCAST_BLOCK_SOURCE       = 0x2b
+	sysMCAST_UNBLOCK_SOURCE     = 0x2c
+	sysMCAST_MSFILTER           = 0x30
+	sysIPV6_ROUTER_ALERT        = 0x16
+	sysIPV6_MTU_DISCOVER        = 0x17
+	sysIPV6_MTU                 = 0x18
+	sysIPV6_RECVERR             = 0x19
+	sysIPV6_V6ONLY              = 0x1a
+	sysIPV6_JOIN_ANYCAST        = 0x1b
+	sysIPV6_LEAVE_ANYCAST       = 0x1c
+
+	sysIPV6_FLOWLABEL_MGR = 0x20
+	sysIPV6_FLOWINFO_SEND = 0x21
+
+	sysIPV6_IPSEC_POLICY = 0x22
+	sysIPV6_XFRM_POLICY  = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x31
+	sysIPV6_PKTINFO      = 0x32
+	sysIPV6_RECVHOPLIMIT = 0x33
+	sysIPV6_HOPLIMIT     = 0x34
+	sysIPV6_RECVHOPOPTS  = 0x35
+	sysIPV6_HOPOPTS      = 0x36
+	sysIPV6_RTHDRDSTOPTS = 0x37
+	sysIPV6_RECVRTHDR    = 0x38
+	sysIPV6_RTHDR        = 0x39
+	sysIPV6_RECVDSTOPTS  = 0x3a
+	sysIPV6_DSTOPTS      = 0x3b
+	sysIPV6_RECVPATHMTU  = 0x3c
+	sysIPV6_PATHMTU      = 0x3d
+	sysIPV6_DONTFRAG     = 0x3e
+
+	sysIPV6_RECVTCLASS = 0x42
+	sysIPV6_TCLASS     = 0x43
+
+	sysIPV6_ADDR_PREFERENCES = 0x48
+
+	sysIPV6_PREFER_SRC_TMP            = 0x1
+	sysIPV6_PREFER_SRC_PUBLIC         = 0x2
+	sysIPV6_PREFER_SRC_PUBTMP_DEFAULT = 0x100
+	sysIPV6_PREFER_SRC_COA            = 0x4
+	sysIPV6_PREFER_SRC_HOME           = 0x400
+	sysIPV6_PREFER_SRC_CGA            = 0x8
+	sysIPV6_PREFER_SRC_NONCGA         = 0x800
+
+	sysIPV6_MINHOPCOUNT = 0x49
+
+	sysIPV6_ORIGDSTADDR     = 0x4a
+	sysIPV6_RECVORIGDSTADDR = 0x4a
+	sysIPV6_TRANSPARENT     = 0x4b
+	sysIPV6_UNICAST_IF      = 0x4c
+
+	sysICMPV6_FILTER = 0x1
+
+	sysICMPV6_FILTER_BLOCK       = 0x1
+	sysICMPV6_FILTER_PASS        = 0x2
+	sysICMPV6_FILTER_BLOCKOTHERS = 0x3
+	sysICMPV6_FILTER_PASSONLY    = 0x4
+
+	sysSOL_SOCKET       = 0x1
+	sysSO_ATTACH_FILTER = 0x1a
+
+	sysSizeofKernelSockaddrStorage = 0x80
+	sysSizeofSockaddrInet6         = 0x1c
+	sysSizeofInet6Pktinfo          = 0x14
+	sysSizeofIPv6Mtuinfo           = 0x20
+	sysSizeofIPv6FlowlabelReq      = 0x20
+
+	sysSizeofIPv6Mreq       = 0x14
+	sysSizeofGroupReq       = 0x88
+	sysSizeofGroupSourceReq = 0x108
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysKernelSockaddrStorage struct {
+	Family  uint16
+	X__data [126]int8
+}
+
+type sysSockaddrInet6 struct {
+	Family   uint16
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex int32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6FlowlabelReq struct {
+	Dst        [16]byte /* in6_addr */
+	Label      uint32
+	Action     uint8
+	Share      uint8
+	Flags      uint16
+	Expires    uint16
+	Linger     uint16
+	X__flr_pad uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Ifindex   int32
+}
+
+type sysGroupReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+}
+
+type sysGroupSourceReq struct {
+	Interface uint32
+	Pad_cgo_0 [4]byte
+	Group     sysKernelSockaddrStorage
+	Source    sysKernelSockaddrStorage
+}
+
+type sysICMPv6Filter struct {
+	Data [8]uint32
+}
+
+type sysSockFProg struct {
+	Len       uint16
+	Pad_cgo_0 [6]byte
+	Filter    *sysSockFilter
+}
+
+type sysSockFilter struct {
+	Code uint16
+	Jt   uint8
+	Jf   uint8
+	K    uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_netbsd.go b/vendor/golang.org/x/net/ipv6/zsys_netbsd.go
new file mode 100644
index 000000000..d6ec88e39
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_netbsd.go
@@ -0,0 +1,84 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_netbsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_IPSEC_POLICY = 0x1c
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+	sysIPV6_PATHMTU     = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_RECVTCLASS = 0x39
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrInet6 = 0x1c
+	sysSizeofInet6Pktinfo  = 0x14
+	sysSizeofIPv6Mtuinfo   = 0x20
+
+	sysSizeofIPv6Mreq = 0x14
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_openbsd.go b/vendor/golang.org/x/net/ipv6/zsys_openbsd.go
new file mode 100644
index 000000000..3e080b78a
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_openbsd.go
@@ -0,0 +1,93 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_openbsd.go
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x4
+	sysIPV6_MULTICAST_IF   = 0x9
+	sysIPV6_MULTICAST_HOPS = 0xa
+	sysIPV6_MULTICAST_LOOP = 0xb
+	sysIPV6_JOIN_GROUP     = 0xc
+	sysIPV6_LEAVE_GROUP    = 0xd
+	sysIPV6_PORTRANGE      = 0xe
+	sysICMP6_FILTER        = 0x12
+
+	sysIPV6_CHECKSUM = 0x1a
+	sysIPV6_V6ONLY   = 0x1b
+
+	sysIPV6_RTHDRDSTOPTS = 0x23
+
+	sysIPV6_RECVPKTINFO  = 0x24
+	sysIPV6_RECVHOPLIMIT = 0x25
+	sysIPV6_RECVRTHDR    = 0x26
+	sysIPV6_RECVHOPOPTS  = 0x27
+	sysIPV6_RECVDSTOPTS  = 0x28
+
+	sysIPV6_USE_MIN_MTU = 0x2a
+	sysIPV6_RECVPATHMTU = 0x2b
+
+	sysIPV6_PATHMTU = 0x2c
+
+	sysIPV6_PKTINFO  = 0x2e
+	sysIPV6_HOPLIMIT = 0x2f
+	sysIPV6_NEXTHOP  = 0x30
+	sysIPV6_HOPOPTS  = 0x31
+	sysIPV6_DSTOPTS  = 0x32
+	sysIPV6_RTHDR    = 0x33
+
+	sysIPV6_AUTH_LEVEL        = 0x35
+	sysIPV6_ESP_TRANS_LEVEL   = 0x36
+	sysIPV6_ESP_NETWORK_LEVEL = 0x37
+	sysIPSEC6_OUTSA           = 0x38
+	sysIPV6_RECVTCLASS        = 0x39
+
+	sysIPV6_AUTOFLOWLABEL = 0x3b
+	sysIPV6_IPCOMP_LEVEL  = 0x3c
+
+	sysIPV6_TCLASS   = 0x3d
+	sysIPV6_DONTFRAG = 0x3e
+	sysIPV6_PIPEX    = 0x3f
+
+	sysIPV6_RTABLE = 0x1021
+
+	sysIPV6_PORTRANGE_DEFAULT = 0x0
+	sysIPV6_PORTRANGE_HIGH    = 0x1
+	sysIPV6_PORTRANGE_LOW     = 0x2
+
+	sysSizeofSockaddrInet6 = 0x1c
+	sysSizeofInet6Pktinfo  = 0x14
+	sysSizeofIPv6Mtuinfo   = 0x20
+
+	sysSizeofIPv6Mreq = 0x14
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrInet6 struct {
+	Len      uint8
+	Family   uint8
+	Port     uint16
+	Flowinfo uint32
+	Addr     [16]byte /* in6_addr */
+	Scope_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysICMPv6Filter struct {
+	Filt [8]uint32
+}
diff --git a/vendor/golang.org/x/net/ipv6/zsys_solaris.go b/vendor/golang.org/x/net/ipv6/zsys_solaris.go
new file mode 100644
index 000000000..cdf00c25d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv6/zsys_solaris.go
@@ -0,0 +1,105 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs defs_solaris.go
+
+// +build solaris
+
+package ipv6
+
+const (
+	sysIPV6_UNICAST_HOPS   = 0x5
+	sysIPV6_MULTICAST_IF   = 0x6
+	sysIPV6_MULTICAST_HOPS = 0x7
+	sysIPV6_MULTICAST_LOOP = 0x8
+	sysIPV6_JOIN_GROUP     = 0x9
+	sysIPV6_LEAVE_GROUP    = 0xa
+
+	sysIPV6_PKTINFO = 0xb
+
+	sysIPV6_HOPLIMIT = 0xc
+	sysIPV6_NEXTHOP  = 0xd
+	sysIPV6_HOPOPTS  = 0xe
+	sysIPV6_DSTOPTS  = 0xf
+
+	sysIPV6_RTHDR        = 0x10
+	sysIPV6_RTHDRDSTOPTS = 0x11
+
+	sysIPV6_RECVPKTINFO  = 0x12
+	sysIPV6_RECVHOPLIMIT = 0x13
+	sysIPV6_RECVHOPOPTS  = 0x14
+
+	sysIPV6_RECVRTHDR = 0x16
+
+	sysIPV6_RECVRTHDRDSTOPTS = 0x17
+
+	sysIPV6_CHECKSUM        = 0x18
+	sysIPV6_RECVTCLASS      = 0x19
+	sysIPV6_USE_MIN_MTU     = 0x20
+	sysIPV6_DONTFRAG        = 0x21
+	sysIPV6_SEC_OPT         = 0x22
+	sysIPV6_SRC_PREFERENCES = 0x23
+	sysIPV6_RECVPATHMTU     = 0x24
+	sysIPV6_PATHMTU         = 0x25
+	sysIPV6_TCLASS          = 0x26
+	sysIPV6_V6ONLY          = 0x27
+
+	sysIPV6_RECVDSTOPTS = 0x28
+
+	sysIPV6_PREFER_SRC_HOME   = 0x1
+	sysIPV6_PREFER_SRC_COA    = 0x2
+	sysIPV6_PREFER_SRC_PUBLIC = 0x4
+	sysIPV6_PREFER_SRC_TMP    = 0x8
+	sysIPV6_PREFER_SRC_NONCGA = 0x10
+	sysIPV6_PREFER_SRC_CGA    = 0x20
+
+	sysIPV6_PREFER_SRC_MIPMASK    = 0x3
+	sysIPV6_PREFER_SRC_MIPDEFAULT = 0x1
+	sysIPV6_PREFER_SRC_TMPMASK    = 0xc
+	sysIPV6_PREFER_SRC_TMPDEFAULT = 0x4
+	sysIPV6_PREFER_SRC_CGAMASK    = 0x30
+	sysIPV6_PREFER_SRC_CGADEFAULT = 0x10
+
+	sysIPV6_PREFER_SRC_MASK = 0x3f
+
+	sysIPV6_PREFER_SRC_DEFAULT = 0x15
+
+	sysIPV6_BOUND_IF   = 0x41
+	sysIPV6_UNSPEC_SRC = 0x42
+
+	sysICMP6_FILTER = 0x1
+
+	sysSizeofSockaddrInet6 = 0x20
+	sysSizeofInet6Pktinfo  = 0x14
+	sysSizeofIPv6Mtuinfo   = 0x24
+
+	sysSizeofIPv6Mreq = 0x14
+
+	sysSizeofICMPv6Filter = 0x20
+)
+
+type sysSockaddrInet6 struct {
+	Family         uint16
+	Port           uint16
+	Flowinfo       uint32
+	Addr           [16]byte /* in6_addr */
+	Scope_id       uint32
+	X__sin6_src_id uint32
+}
+
+type sysInet6Pktinfo struct {
+	Addr    [16]byte /* in6_addr */
+	Ifindex uint32
+}
+
+type sysIPv6Mtuinfo struct {
+	Addr sysSockaddrInet6
+	Mtu  uint32
+}
+
+type sysIPv6Mreq struct {
+	Multiaddr [16]byte /* in6_addr */
+	Interface uint32
+}
+
+type sysICMPv6Filter struct {
+	X__icmp6_filt [8]uint32
+}