Hulk did something

[bytom/vapor.git] / vendor / golang.org / x / net / ipv4 / packet_go1_8.go

diff --git a/vendor/golang.org/x/net/ipv4/packet_go1_8.go b/vendor/golang.org/x/net/ipv4/packet_go1_8.go
new file mode 100644 (file)
index 0000000..b47d186
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/packet_go1_8.go
@@ -0,0 +1,56 @@
+// 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.
+
+// +build !go1.9
+
+package ipv4
+
+import "net"
+
+func (c *packetHandler) readFrom(b []byte) (h *Header, p []byte, cm *ControlMessage, err error) {
+       c.rawOpt.RLock()
+       oob := NewControlMessage(c.rawOpt.cflags)
+       c.rawOpt.RUnlock()
+       n, nn, _, src, err := c.ReadMsgIP(b, oob)
+       if err != nil {
+               return nil, nil, nil, err
+       }
+       var hs []byte
+       if hs, p, err = slicePacket(b[:n]); err != nil {
+               return nil, nil, nil, err
+       }
+       if h, err = ParseHeader(hs); err != nil {
+               return nil, nil, nil, err
+       }
+       if nn > 0 {
+               cm = new(ControlMessage)
+               if err := cm.Parse(oob[:nn]); err != nil {
+                       return nil, nil, nil, err
+               }
+       }
+       if src != nil && cm != nil {
+               cm.Src = src.IP
+       }
+       return
+}
+
+func (c *packetHandler) writeTo(h *Header, p []byte, cm *ControlMessage) error {
+       oob := cm.Marshal()
+       wh, err := h.Marshal()
+       if err != nil {
+               return err
+       }
+       dst := new(net.IPAddr)
+       if cm != nil {
+               if ip := cm.Dst.To4(); ip != nil {
+                       dst.IP = ip
+               }
+       }
+       if dst.IP == nil {
+               dst.IP = h.Dst
+       }
+       wh = append(wh, p...)
+       _, _, err = c.WriteMsgIP(wh, oob, dst)
+       return err
+}