From 26513c438e279b22a56ec9250395f3d0a0ea65b8 Mon Sep 17 00:00:00 2001
From: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Date: Wed, 2 Aug 2017 10:22:09 +0900
Subject: server: add sockopt ttl support to darwin

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
---
 server/sockopt_darwin.go | 60 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 server/sockopt_darwin.go

(limited to 'server/sockopt_darwin.go')

diff --git a/server/sockopt_darwin.go b/server/sockopt_darwin.go
new file mode 100644
index 00000000..47cebe44
--- /dev/null
+++ b/server/sockopt_darwin.go
@@ -0,0 +1,60 @@
+// Copyright (C) 2016-2017 Nippon Telegraph and Telephone Corporation.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+// implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// +build darwin
+
+package server
+
+import (
+	"fmt"
+	"net"
+	"os"
+	"syscall"
+)
+
+func setTcpMD5SigSockopt(l *net.TCPListener, address string, key string) error {
+	return fmt.Errorf("setting md5 is not supported")
+}
+
+func setsockoptIpTtl(fd int, family int, value int) error {
+	level := syscall.IPPROTO_IP
+	name := syscall.IP_TTL
+	if family == syscall.AF_INET6 {
+		level = syscall.IPPROTO_IPV6
+		name = syscall.IPV6_UNICAST_HOPS
+	}
+	return os.NewSyscallError("setsockopt", syscall.SetsockoptInt(fd, level, name, value))
+}
+
+func setListenTcpTTLSockopt(l *net.TCPListener, ttl int) error {
+	fi, family, err := extractFileAndFamilyFromTCPListener(l)
+	defer fi.Close()
+	if err != nil {
+		return err
+	}
+	return setsockoptIpTtl(int(fi.Fd()), family, ttl)
+}
+
+func setTcpTTLSockopt(conn *net.TCPConn, ttl int) error {
+	fi, family, err := extractFileAndFamilyFromTCPConn(conn)
+	defer fi.Close()
+	if err != nil {
+		return err
+	}
+	return setsockoptIpTtl(int(fi.Fd()), family, ttl)
+}
+
+func setTcpMinTTLSockopt(conn *net.TCPConn, ttl int) error {
+	return fmt.Errorf("setting min ttl is not supported")
+}
-- 
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