添加 UDP 广播功能

socket/src/main/kotlin/cn/tursom/datagram/broadcast/BroadcastServer.kt

@@ -0,0 +1,49 @@
+package cn.tursom.datagram.broadcast
+
+import cn.tursom.core.toUTF8String
+import cn.tursom.datagram.UdpPackageSize.LANNetLen
+import java.lang.Thread.sleep
+import java.net.DatagramPacket
+import java.net.DatagramSocket
+import java.net.InetAddress
+import java.util.*
+import kotlin.concurrent.thread
+
+class BroadcastServer(val port: Int, val bufSize: Int = LANNetLen) {
+  private val socket = DatagramSocket()
+  private val server by lazy { DatagramSocket(port) }
+  private val buffer = DatagramPacket(ByteArray(bufSize), bufSize)
+
+  constructor(port: Int) : this(port, LANNetLen)
+
+  private fun send(packet: DatagramPacket) {
+    socket.send(packet)
+  }
+
+  fun send(packet: ByteArray) {
+    send(packet, 0, packet.size)
+  }
+
+  fun send(packet: ByteArray, offset: Int = 0, size: Int = packet.size) {
+    send(DatagramPacket(packet, offset, size, broadcastInetAddr, port))
+  }
+
+  fun recv(): ByteArray {
+    server.receive(buffer)
+    return Arrays.copyOfRange(buffer.data, 0, buffer.length)
+  }
+
+  fun recvBuffer(): DatagramPacket {
+    server.receive(buffer)
+    return buffer
+  }
+
+  companion object {
+    const val BROADCAST_IP = "255.255.255.255"
+    @JvmStatic
+    val broadcastInetAddr = InetAddress.getByName(BROADCAST_IP)
+
+    @JvmStatic
+    fun takeOut(packet: DatagramPacket) = Arrays.copyOfRange(packet.data, 0, packet.length)
+  }
+}

socket/src/main/kotlin/cn/tursom/datagram/client/UdpClient.kt

@@ -1,5 +1,6 @@
 package cn.tursom.datagram.client
 
+import cn.tursom.datagram.UdpPackageSize.defaultLen
 import java.io.Closeable
 import java.net.DatagramPacket
 import java.net.DatagramSocket
@@ -39,12 +40,4 @@ class UdpClient(
 	override fun close() {
 		socket.close()
 	}
-	
-	@Suppress("MemberVisibilityCanBePrivate")
-	companion object {
-		//定义不同环境下数据报的最大大小
-		const val LANNetLen = 1472
-		const val internetLen = 548
-		const val defaultLen = internetLen
-	}
 }

utils/src/main/kotlin/cn/tursom/utils/TokenUtil.kt

@@ -38,7 +38,7 @@ open class TokenUtil {
     if (decode.tim + decode.exp < System.currentTimeMillis()) {
       throw TokenTimeoutException()
     }
-    return fromJson(toJson(decode.dat), dataClazz)
+    return fromJson(toJson(decode.dat!!), dataClazz)
   }
 
   open fun encrypt(secretKey: String, encryptSource: ByteArray, type: String): String {
@@ -58,7 +58,7 @@ open class TokenUtil {
 
   private inline fun <reified T : Any> fromJson(json: String): T = fromJson(json, T::class.java)
 
-  data class TokenBody<T>(val tim: Long, val exp: Long, val dat: T)
+  data class TokenBody<T>(val tim: Long = System.currentTimeMillis(), val exp: Long = 0L, val dat: T? = null)
 
   open class TokenException : Exception()
   class WrongTokenSyntaxException : TokenException()