Small edit (#246)

[bytom/vapor.git] / vendor / github.com / google / uuid / node_net.go

diff --git a/vendor/github.com/google/uuid/node_net.go b/vendor/github.com/google/uuid/node_net.go
new file mode 100644 (file)
index 0000000..0cbbcdd
--- /dev/null
+++ b/vendor/github.com/google/uuid/node_net.go
@@ -0,0 +1,33 @@
+// Copyright 2017 Google Inc.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build !js
+
+package uuid
+
+import "net"
+
+var interfaces []net.Interface // cached list of interfaces
+
+// getHardwareInterface returns the name and hardware address of interface name.
+// If name is "" then the name and hardware address of one of the system's
+// interfaces is returned.  If no interfaces are found (name does not exist or
+// there are no interfaces) then "", nil is returned.
+//
+// Only addresses of at least 6 bytes are returned.
+func getHardwareInterface(name string) (string, []byte) {
+       if interfaces == nil {
+               var err error
+               interfaces, err = net.Interfaces()
+               if err != nil {
+                       return "", nil
+               }
+       }
+       for _, ifs := range interfaces {
+               if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) {
+                       return ifs.Name, ifs.HardwareAddr
+               }
+       }
+       return "", nil
+}