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Diffstat (limited to 'vendor/golang.org/x/net/ipv4/packet_go1_9.go')
-rw-r--r--vendor/golang.org/x/net/ipv4/packet_go1_9.go67
1 files changed, 67 insertions, 0 deletions
diff --git a/vendor/golang.org/x/net/ipv4/packet_go1_9.go b/vendor/golang.org/x/net/ipv4/packet_go1_9.go
new file mode 100644
index 0000000..082c36d
--- /dev/null
+++ b/vendor/golang.org/x/net/ipv4/packet_go1_9.go
@@ -0,0 +1,67 @@
+// 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 go1.9
+
+package ipv4
+
+import (
+ "net"
+
+ "golang.org/x/net/internal/socket"
+)
+
+func (c *packetHandler) readFrom(b []byte) (h *Header, p []byte, cm *ControlMessage, err error) {
+ c.rawOpt.RLock()
+ m := socket.Message{
+ Buffers: [][]byte{b},
+ OOB: NewControlMessage(c.rawOpt.cflags),
+ }
+ c.rawOpt.RUnlock()
+ if err := c.RecvMsg(&m, 0); err != nil {
+ return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+ }
+ var hs []byte
+ if hs, p, err = slicePacket(b[:m.N]); err != nil {
+ return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+ }
+ if h, err = ParseHeader(hs); err != nil {
+ return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+ }
+ if m.NN > 0 {
+ cm = new(ControlMessage)
+ if err := cm.Parse(m.OOB[:m.NN]); err != nil {
+ return nil, nil, nil, &net.OpError{Op: "read", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Err: err}
+ }
+ }
+ if src, ok := m.Addr.(*net.IPAddr); ok && cm != nil {
+ cm.Src = src.IP
+ }
+ return
+}
+
+func (c *packetHandler) writeTo(h *Header, p []byte, cm *ControlMessage) error {
+ m := socket.Message{
+ OOB: cm.Marshal(),
+ }
+ wh, err := h.Marshal()
+ if err != nil {
+ return err
+ }
+ m.Buffers = [][]byte{wh, p}
+ 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
+ }
+ m.Addr = dst
+ if err := c.SendMsg(&m, 0); err != nil {
+ return &net.OpError{Op: "write", Net: c.IPConn.LocalAddr().Network(), Source: c.IPConn.LocalAddr(), Addr: opAddr(dst), Err: err}
+ }
+ return nil
+}