127 lines
4.8 KiB
Kotlin
127 lines
4.8 KiB
Kotlin
/*
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* Copyright 2021 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.network.aeron.mediaDriver
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import dorkbox.netUtil.IPv4
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import dorkbox.netUtil.IPv6
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import dorkbox.network.aeron.AeronDriver
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import dorkbox.network.connection.EndPoint
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import io.aeron.Publication
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import mu.KLogger
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import java.net.Inet4Address
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import java.net.Inet6Address
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import java.net.InetAddress
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/**
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* This represents the connection PAIR between a server<->client
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* A connection timeout of 0, means to wait forever
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*/
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internal class ServerUdpPairedDriver(
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listenAddress: InetAddress,
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val remoteAddress: InetAddress,
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port: Int,
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streamId: Int,
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sessionId: Int,
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connectionTimeoutSec: Int,
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isReliable: Boolean
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) :
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ServerUdpDriver(
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listenAddress = listenAddress,
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port = port,
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streamId = streamId,
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sessionId = sessionId,
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connectionTimeoutSec = connectionTimeoutSec,
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isReliable = isReliable
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) {
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lateinit var publication: Publication
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override fun build(aeronDriver: AeronDriver, logger: KLogger) {
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// connection timeout of 0 doesn't matter. it is not used by the server
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// the client address WILL BE either IPv4 or IPv6
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val isRemoteIpv4 = remoteAddress is Inet4Address
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// if we are connecting to localhost IPv4 (but our server is IPv6+4), then aeron MUST publish on the IPv4 version
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val properPubAddress = EndPoint.getWildcard(listenAddress, listenAddressString, isRemoteIpv4)
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// create a new publication for the connection (since the handshake ALWAYS closes the current publication)
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val publicationUri = MediaDriverConnection.uri("udp", sessionId, isReliable).controlEndpoint(isRemoteIpv4, properPubAddress, port+1)
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if (logger.isTraceEnabled) {
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if (isRemoteIpv4) {
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logger.trace("IPV4 server e-pub URI: ${publicationUri.build()},stream-id=$streamId")
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} else {
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logger.trace("IPV6 server e-pub URI: ${publicationUri.build()},stream-id=$streamId")
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}
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}
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val publication = aeronDriver.addExclusivePublication(publicationUri, streamId)
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// if we are IPv6 WILDCARD -- then our subscription must ALSO be IPv6, even if our connection is via IPv4
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var subShouldBeIpv4 = isRemoteIpv4
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val properSubAddress = if (listenAddress == IPv6.WILDCARD) {
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subShouldBeIpv4 = false
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IPv6.WILDCARD_STRING
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} else {
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// this will cause us to listen on the interface that connects with the remote address, instead of ALL interfaces.
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val localAddresses = publication.localSocketAddresses().first()
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val splitPoint = localAddresses.lastIndexOf(':')
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var localAddressString = localAddresses.substring(0, splitPoint)
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if (!isRemoteIpv4) {
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// this is necessary to clean up the address when adding it to aeron, since different formats mess it up
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// aeron IPv6 addresses all have [...]
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localAddressString = localAddressString.substring(1, localAddressString.length-1)
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localAddressString = IPv6.toString(IPv6.toAddress(localAddressString)!!)
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}
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localAddressString
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}
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// Create a subscription at the given address and port, using the given stream ID.
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val subscriptionUri = MediaDriverConnection.uri("udp", sessionId, isReliable).endpoint(subShouldBeIpv4, properSubAddress, port)
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if (logger.isTraceEnabled) {
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if (isRemoteIpv4) {
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logger.trace("IPV4 server sub URI: ${subscriptionUri.build()},stream-id=$streamId")
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} else {
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logger.trace("IPV6 server sub URI: ${subscriptionUri.build()},stream-id=$streamId")
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}
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}
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val subscription = aeronDriver.addSubscription(subscriptionUri, streamId)
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val remoteAddressString = if (isRemoteIpv4) {
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IPv4.toString(remoteAddress as Inet4Address)
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} else {
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IPv6.toString(remoteAddress as Inet6Address)
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}
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this.info = "$remoteAddressString via $prettyAddressString [$port|${port+1}] [$streamId|$sessionId] (reliable:$isReliable)"
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this.success = true
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this.publication = publication
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this.subscription = subscription
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}
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}
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