diff --git a/unum/vendor/golang.org/x/net/internal/socket/sys_stub.go b/unum/vendor/golang.org/x/net/internal/socket/sys_stub.go
new file mode 100644
index 0000000..d9f06d0
--- /dev/null
+++ b/unum/vendor/golang.org/x/net/internal/socket/sys_stub.go
@@ -0,0 +1,64 @@
+// Copyright 2017 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,!solaris,!windows
+
+package socket
+
+import (
+	"errors"
+	"net"
+	"runtime"
+	"unsafe"
+)
+
+const (
+	sysAF_UNSPEC = 0x0
+	sysAF_INET   = 0x2
+	sysAF_INET6  = 0xa
+
+	sysSOCK_RAW = 0x3
+)
+
+func probeProtocolStack() int {
+	switch runtime.GOARCH {
+	case "amd64p32", "mips64p32":
+		return 4
+	default:
+		var p uintptr
+		return int(unsafe.Sizeof(p))
+	}
+}
+
+func marshalInetAddr(ip net.IP, port int, zone string) []byte {
+	return nil
+}
+
+func parseInetAddr(b []byte, network string) (net.Addr, error) {
+	return nil, errors.New("not implemented")
+}
+
+func getsockopt(s uintptr, level, name int, b []byte) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func setsockopt(s uintptr, level, name int, b []byte) error {
+	return errors.New("not implemented")
+}
+
+func recvmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmsg(s uintptr, h *msghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func recvmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}
+
+func sendmmsg(s uintptr, hs []mmsghdr, flags int) (int, error) {
+	return 0, errors.New("not implemented")
+}