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71 lines
1.9 KiB
Go
71 lines
1.9 KiB
Go
// Copyright (C) 2016 Nippon Telegraph and Telephone Corporation.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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// implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build dragonfly || freebsd || netbsd
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// +build dragonfly freebsd netbsd
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package server
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import (
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"net"
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"syscall"
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)
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const (
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tcpMD5SIG = 0x10 // TCP MD5 Signature (RFC2385)
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ipv6MinHopCount = 73 // Generalized TTL Security Mechanism (RFC5082)
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)
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func setTcpMD5SigSockopt(l *net.TCPListener, address string, key string) error {
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sc, err := l.SyscallConn()
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if err != nil {
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return err
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}
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// always enable and assumes that the configuration is done by setkey()
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return setsockOptInt(sc, syscall.IPPROTO_TCP, tcpMD5SIG, 1)
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}
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func setTcpTTLSockopt(conn *net.TCPConn, ttl int) error {
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family := extractFamilyFromTCPConn(conn)
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sc, err := conn.SyscallConn()
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if err != nil {
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return err
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}
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return setsockoptIpTtl(sc, family, ttl)
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}
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func setTcpMinTTLSockopt(conn *net.TCPConn, ttl int) error {
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family := extractFamilyFromTCPConn(conn)
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sc, err := conn.SyscallConn()
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if err != nil {
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return err
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}
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level := syscall.IPPROTO_IP
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name := syscall.IP_MINTTL
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if family == syscall.AF_INET6 {
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level = syscall.IPPROTO_IPV6
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name = ipv6MinHopCount
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}
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return setsockOptInt(sc, level, name, ttl)
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}
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func setTcpMSSSockopt(conn *net.TCPConn, mss uint16) error {
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family := extractFamilyFromTCPConn(conn)
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sc, err := conn.SyscallConn()
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if err != nil {
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return err
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}
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return setsockoptTcpMss(sc, family, mss)
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}
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