implement #87 multiple hostname suffix

src/main/kotlin/com/github/creeper123123321/viaaas/config/VIAaaSConfig.kt

@@ -16,7 +16,7 @@ object VIAaaSConfig : Config(File("config/viaaas.yml")) {
     val isNativeTransportMc: Boolean get() = this.getBoolean("native-transport-mc", true)
     val port: Int get() = this.getInt("port", 25565)
     val bindAddress: String get() = this.getString("bind-address", "localhost")!!
-    val hostName: String get() = this.getString("host-name", "viaaas.localhost")!!
+    val hostName: List<String> get() = this.getString("host-name", "viaaas.localhost")!!.split(",")
     val mcRsaSize: Int get() = this.getInt("mc-rsa-size", 4096)
     val useStrongRandom: Boolean get() = this.getBoolean("use-strong-random", true)
     val blockLocalAddress: Boolean get() = this.getBoolean("block-local-address", true)

src/main/kotlin/com/github/creeper123123321/viaaas/handler/state/HandshakeState.kt

@@ -23,6 +23,7 @@ class HandshakeState : MinecraftConnectionState {
                 RateLimiter.create(VIAaaSConfig.rateLimitConnectionMc)
             })
     }
+
     override val state: State
         get() = State.HANDSHAKE
 
@@ -43,7 +44,12 @@ class HandshakeState : MinecraftConnectionState {
         val extraData = packet.address.substringAfter(0.toChar(), missingDelimiterValue = "") // todo
         val virtualHostNoExtra = packet.address.substringBefore(0.toChar())
 
-        val parsed = VIAaaSAddress().parse(virtualHostNoExtra, VIAaaSConfig.hostName)
+        val parsed = VIAaaSConfig.hostName.map {
+            VIAaaSAddress().parse(virtualHostNoExtra, it)
+        }.sortedBy {
+            it.viaSuffix == null
+        }.first()
+
         val backProto = parsed.protocol
         val hadHostname = parsed.viaSuffix != null
 

src/main/resources/viaaas.yml

@@ -26,14 +26,15 @@ use-strong-random: false
 ######
 # VIAaaS virtual hosts options
 ######
-# Host name of this instance, that will be used in the virtual host as a suffix.
-host-name: viaaas.localhost
-# Requires online mode for front-end connections. May be useful for stopping bots.
-force-online-mode: false
 # Requires virtual host to contain the value from "host-name" as a suffix.
 # A false value will allow virtual hosts with no suffix, connecting to the virtual host sent by client.
 # A false value could be used for transparent proxying.
 require-host-name: true
+# Host names of this instance, that will be used in the virtual host as a suffix.
+# Use commas for separating multiple hostnames.
+host-name: viaaas.localhost,via.localhost
+# Requires online mode for front-end connections. May be useful for stopping bots.
+force-online-mode: false
 # Default port to be used when connecting to the backend server.
 # Use -1 to reuse the port sent by client, useful for transparent proxying.
 default-backend-port: 25565