1 files changed, 116 insertions, 0 deletions
diff --git a/src/net/rawconn_windows_test.go b/src/net/rawconn_windows_test.go
new file mode 100644
index 0000000..5febf08
--- /dev/null
+++ b/src/net/rawconn_windows_test.go
@@ -0,0 +1,116 @@
+// 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.
+
+package net
+
+import (
+	"errors"
+	"syscall"
+	"unsafe"
+)
+
+func readRawConn(c syscall.RawConn, b []byte) (int, error) {
+	var operr error
+	var n int
+	err := c.Read(func(s uintptr) bool {
+		var read uint32
+		var flags uint32
+		var buf syscall.WSABuf
+		buf.Buf = &b[0]
+		buf.Len = uint32(len(b))
+		operr = syscall.WSARecv(syscall.Handle(s), &buf, 1, &read, &flags, nil, nil)
+		n = int(read)
+		return true
+	})
+	if err != nil {
+		return n, err
+	}
+	return n, operr
+}
+
+func writeRawConn(c syscall.RawConn, b []byte) error {
+	var operr error
+	err := c.Write(func(s uintptr) bool {
+		var written uint32
+		var buf syscall.WSABuf
+		buf.Buf = &b[0]
+		buf.Len = uint32(len(b))
+		operr = syscall.WSASend(syscall.Handle(s), &buf, 1, &written, 0, nil, nil)
+		return true
+	})
+	if err != nil {
+		return err
+	}
+	return operr
+}
+
+func controlRawConn(c syscall.RawConn, addr Addr) error {
+	var operr error
+	fn := func(s uintptr) {
+		var v, l int32
+		l = int32(unsafe.Sizeof(v))
+		operr = syscall.Getsockopt(syscall.Handle(s), syscall.SOL_SOCKET, syscall.SO_REUSEADDR, (*byte)(unsafe.Pointer(&v)), &l)
+		if operr != nil {
+			return
+		}
+		switch addr := addr.(type) {
+		case *TCPAddr:
+			// There's no guarantee that IP-level socket
+			// options work well with dual stack sockets.
+			// A simple solution would be to take a look
+			// at the bound address to the raw connection
+			// and to classify the address family of the
+			// underlying socket by the bound address:
+			//
+			// - When IP.To16() != nil and IP.To4() == nil,
+			//   we can assume that the raw connection
+			//   consists of an IPv6 socket using only
+			//   IPv6 addresses.
+			//
+			// - When IP.To16() == nil and IP.To4() != nil,
+			//   the raw connection consists of an IPv4
+			//   socket using only IPv4 addresses.
+			//
+			// - Otherwise, the raw connection is a dual
+			//   stack socket, an IPv6 socket using IPv6
+			//   addresses including IPv4-mapped or
+			//   IPv4-embedded IPv6 addresses.
+			if addr.IP.To16() != nil && addr.IP.To4() == nil {
+				operr = syscall.SetsockoptInt(syscall.Handle(s), syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS, 1)
+			} else if addr.IP.To16() == nil && addr.IP.To4() != nil {
+				operr = syscall.SetsockoptInt(syscall.Handle(s), syscall.IPPROTO_IP, syscall.IP_TTL, 1)
+			}
+		}
+	}
+	if err := c.Control(fn); err != nil {
+		return err
+	}
+	return operr
+}
+
+func controlOnConnSetup(network string, address string, c syscall.RawConn) error {
+	var operr error
+	var fn func(uintptr)
+	switch network {
+	case "tcp", "udp", "ip":
+		return errors.New("ambiguous network: " + network)
+	default:
+		switch network[len(network)-1] {
+		case '4':
+			fn = func(s uintptr) {
+				operr = syscall.SetsockoptInt(syscall.Handle(s), syscall.IPPROTO_IP, syscall.IP_TTL, 1)
+			}
+		case '6':
+			fn = func(s uintptr) {
+				operr = syscall.SetsockoptInt(syscall.Handle(s), syscall.IPPROTO_IPV6, syscall.IPV6_UNICAST_HOPS, 1)
+			}
+		default:
+			return errors.New("unknown network: " + network)
+		}
+	}
+	if err := c.Control(fn); err != nil {
+		return err
+	}
+	return operr
+}