Hulk did something

[bytom/vapor.git] / vendor / golang.org / x / net / ipv4 / helper.go

diff --git a/vendor/golang.org/x/net/ipv4/helper.go b/vendor/golang.org/x/net/ipv4/helper.go
new file mode 100644 (file)
index 0000000..a5052e3
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/helper.go
@@ -0,0 +1,63 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package ipv4
+
+import (
+       "errors"
+       "net"
+)
+
+var (
+       errMissingAddress           = errors.New("missing address")
+       errMissingHeader            = errors.New("missing header")
+       errHeaderTooShort           = errors.New("header too short")
+       errBufferTooShort           = errors.New("buffer too short")
+       errInvalidConnType          = errors.New("invalid conn type")
+       errOpNoSupport              = errors.New("operation not supported")
+       errNoSuchInterface          = errors.New("no such interface")
+       errNoSuchMulticastInterface = errors.New("no such multicast interface")
+
+       // See http://www.freebsd.org/doc/en/books/porters-handbook/freebsd-versions.html.
+       freebsdVersion uint32
+)
+
+func boolint(b bool) int {
+       if b {
+               return 1
+       }
+       return 0
+}
+
+func netAddrToIP4(a net.Addr) net.IP {
+       switch v := a.(type) {
+       case *net.UDPAddr:
+               if ip := v.IP.To4(); ip != nil {
+                       return ip
+               }
+       case *net.IPAddr:
+               if ip := v.IP.To4(); ip != nil {
+                       return ip
+               }
+       }
+       return nil
+}
+
+func opAddr(a net.Addr) net.Addr {
+       switch a.(type) {
+       case *net.TCPAddr:
+               if a == nil {
+                       return nil
+               }
+       case *net.UDPAddr:
+               if a == nil {
+                       return nil
+               }
+       case *net.IPAddr:
+               if a == nil {
+                       return nil
+               }
+       }
+       return a
+}