go.net/ipv4: new package
Package ipv4 implements IP-level socket options for the Internet
Protocol version 4. It also provides raw IP socket access methods
including IPv4 header manipulation.
Fixes golang/go#3684.
Fixes golang/go#3820.
This CL requires CL 6426047;
net: add read, write message methods to IPConn, UDPConn
R=rsc, dave, alex.brainman
CC=gobot, golang-dev
https://golang.org/cl/6482044
diff --git a/ipv4/sockopt_freebsd.go b/ipv4/sockopt_freebsd.go
new file mode 100644
index 0000000..6bcd66f
--- /dev/null
+++ b/ipv4/sockopt_freebsd.go
@@ -0,0 +1,26 @@
+// Copyright 2012 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 ipv4
+
+import (
+ "os"
+ "syscall"
+)
+
+func ipv4SendSourceAddress(fd int) (bool, error) {
+ v, err := syscall.GetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_SENDSRCADDR)
+ if err != nil {
+ return false, os.NewSyscallError("getsockopt", err)
+ }
+ return v == 1, nil
+}
+
+func setIPv4SendSourceAddress(fd int, v bool) error {
+ err := syscall.SetsockoptInt(fd, syscall.IPPROTO_IP, syscall.IP_SENDSRCADDR, boolint(v))
+ if err != nil {
+ return os.NewSyscallError("setsockopt", err)
+ }
+ return nil
+}
