1 files changed, 45 insertions, 0 deletions
diff --git a/src/pkg/net/sockopt_bsd.go b/src/pkg/net/sockopt_bsd.go
new file mode 100644
index 000000000..2093e0812
--- /dev/null
+++ b/src/pkg/net/sockopt_bsd.go
@@ -0,0 +1,45 @@
+// 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.
+
+// +build darwin freebsd netbsd openbsd
+
+// Socket options for BSD variants
+
+package net
+
+import (
+	"syscall"
+)
+
+func setDefaultSockopts(s, f, t int) {
+	switch f {
+	case syscall.AF_INET6:
+		// Allow both IP versions even if the OS default is otherwise.
+		syscall.SetsockoptInt(s, syscall.IPPROTO_IPV6, syscall.IPV6_V6ONLY, 0)
+	}
+
+	if f == syscall.AF_UNIX ||
+		(f == syscall.AF_INET || f == syscall.AF_INET6) && t == syscall.SOCK_STREAM {
+		// Allow reuse of recently-used addresses.
+		syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
+
+		// Allow reuse of recently-used ports.
+		// This option is supported only in descendants of 4.4BSD,
+		// to make an effective multicast application and an application
+		// that requires quick draw possible.
+		syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_REUSEPORT, 1)
+	}
+
+	// Allow broadcast.
+	syscall.SetsockoptInt(s, syscall.SOL_SOCKET, syscall.SO_BROADCAST, 1)
+}
+
+func setDefaultMulticastSockopts(fd *netFD) {
+	fd.incref()
+	defer fd.decref()
+	// Allow multicast UDP and raw IP datagram sockets to listen
+	// concurrently across multiple listeners.
+	syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_REUSEADDR, 1)
+	syscall.SetsockoptInt(fd.sysfd, syscall.SOL_SOCKET, syscall.SO_REUSEPORT, 1)
+}