From 5c19c4e5e31849c7a597adf88617e26a180ec4fb Mon Sep 17 00:00:00 2001
From: Christopher Wedgwood <cw@f00f.org>
Date: Mon, 24 May 2010 16:53:23 -0700
Subject: [PATCH] net: udp, implement BindToDevice

R=rsc
CC=golang-dev, r
https://golang.org/cl/1271041
---
 src/pkg/net/udpsock.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/pkg/net/udpsock.go b/src/pkg/net/udpsock.go
index 6de69a9c9b..5e22c778d9 100644
--- a/src/pkg/net/udpsock.go
+++ b/src/pkg/net/udpsock.go
@@ -259,3 +259,13 @@ func ListenUDP(net string, laddr *UDPAddr) (c *UDPConn, err os.Error) {
 	}
 	return newUDPConn(fd), nil
 }
+
+// BindToDevice binds a UDPConn to a network interface.
+func (c *UDPConn) BindToDevice(device string) os.Error {
+	if !c.ok() {
+		return os.EINVAL
+	}
+	c.fd.incref()
+	defer c.fd.decref()
+	return os.NewSyscallError("setsockopt", syscall.BindToDevice(c.fd.sysfd, device))
+}
-- 
2.50.0