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-rw-r--r--src/net/sockopt_windows.go40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/net/sockopt_windows.go b/src/net/sockopt_windows.go
new file mode 100644
index 0000000..8afaf34
--- /dev/null
+++ b/src/net/sockopt_windows.go
@@ -0,0 +1,40 @@
+// Copyright 2011 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 (
+ "os"
+ "syscall"
+)
+
+func setDefaultSockopts(s syscall.Handle, family, sotype int, ipv6only bool) error {
+ if family == syscall.AF_INET6 && sotype != syscall.SOCK_RAW {
+ // Allow both IP versions even if the OS default
+ // is otherwise. Note that some operating systems
+ // never admit this option.
+ syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, boolint(ipv6only))
+ }
+ if (sotype == syscall.SOCK_DGRAM || sotype == syscall.SOCK_RAW) && family != syscall.AF_UNIX && family != syscall.AF_INET6 {
+ // Allow broadcast.
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1))
+ }
+ return nil
+}
+
+func setDefaultListenerSockopts(s syscall.Handle) error {
+ // Windows will reuse recently-used addresses by default.
+ // SO_REUSEADDR should not be used here, as it allows
+ // a socket to forcibly bind to a port in use by another socket.
+ // This could lead to a non-deterministic behavior, where
+ // connection requests over the port cannot be guaranteed
+ // to be handled by the correct socket.
+ return nil
+}
+
+func setDefaultMulticastSockopts(s syscall.Handle) error {
+ // Allow multicast UDP and raw IP datagram sockets to listen
+ // concurrently across multiple listeners.
+ return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1))
+}