77 lines
2.8 KiB
Kotlin
77 lines
2.8 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 java.io.BufferedWriter
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import java.io.File
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import java.io.FileWriter
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import java.io.IOException
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object IPRoute {
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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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private val reservedTable = StringBuilder(2048)
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private val tableNames: MutableMap<Int, String?> = HashMap(256)
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/**
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* @throws IOException if the policy routing tables are unable to initialize
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*/
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fun addRtTables(tableNames: Map<Int, String>) {
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if (Common.OS_LINUX) {
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for ((tableNumber, tableName) in tableNames) {
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if (tableNumber == 0 || tableNumber == 253 || tableNumber == 254 || tableNumber == 255) {
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Common.logger.error("Trying to add table with same number as reserved value. Skipping.")
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continue
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}
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if (!IPRoute.tableNames.containsKey(tableNumber)) {
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IPRoute.tableNames[tableNumber] = tableName
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} else {
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if (IPRoute.tableNames[tableNumber] != tableName) {
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Common.logger.error("Trying to add table with the same number as another table. Skipping")
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}
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}
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}
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val table = StringBuilder(2048)
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for ((tableNumber, tableName) in IPRoute.tableNames) {
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table.append(tableNumber).append(" ").append(tableName).append("\n");
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}
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val policyRouteFile = File("/etc/iproute2/rt_tables").absoluteFile
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if (!policyRouteFile.canRead()) {
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throw IOException("Unable to initialize policy routing tables. Something is SERIOUSLY wrong, aborting startup!")
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}
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try {
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BufferedWriter(FileWriter(policyRouteFile)).use { writer ->
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writer.write(reservedTable.toString())
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writer.write(table.toString())
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writer.flush()
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}
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} catch (e: IOException) {
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Common.logger.error("Error saving routing table file: {}", policyRouteFile, e)
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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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}
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