60 lines
1.9 KiB
Kotlin
60 lines
1.9 KiB
Kotlin
/*
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* Copyright 2020 dorkbox, llc
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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 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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*/
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package dorkbox.netUtil
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import dorkbox.executor.Executor
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import java.io.File
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object Arp {
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/**
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* Gets the version number.
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*/
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const val version = Common.version
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// Now setup ARP Proxy for this interface (so ARP requests are answered correctly)
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fun proxyAdd(interfaceName: String) {
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if (Common.OS_LINUX) {
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val file = File("/proc/sys/net/ipv4/conf/$interfaceName/proxy_arp")
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if (!file.readText().contains("1")) {
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file.appendText("1")
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}
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} else {
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throw RuntimeException("NOT IMPL.")
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}
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}
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fun proxyDel(interfaceName: String) {
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if (Common.OS_LINUX) {
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val file = File("/proc/sys/net/ipv4/conf/$interfaceName/proxy_arp")
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file.delete()
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} else {
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throw RuntimeException("NOT IMPL.")
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}
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}
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fun add(interfaceName: String, targetIpAddress: String, targetMacAddress: String) {
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if (Common.OS_LINUX) {
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// have to make sure that the host interface will answer ARP for the "target" ip (normally, it will not for veth interfaces)
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Executor()
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.command("/usr/sbin/arp", "-i", interfaceName, "-s", targetIpAddress, targetMacAddress)
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.startBlocking()
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} else {
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throw RuntimeException("NOT IMPL.")
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}
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}
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}
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