finished component: FreshnessPeriod

src/main/java/component/CongestionMark.java

@@ -67,7 +67,7 @@ public class CongestionMark implements TlvComponentBase,InitialAble, IEncodingAb
         }
         totalLength+=tmplen;
 
-        return 0;
+        return totalLength;
     }
 
     /**

src/main/java/component/FreshnessPeriod.java

@@ -0,0 +1,93 @@
+package component;
+
+import encoding.*;
+
+/*
+ * @Author: Wang Feng
+ * @Description:
+ * @Version: 1.0.0
+ * @Date: 16:10 2021/3/9
+ * @Copyright: MIN-Group；国家重大科技基础设施——未来网络北大实验室；深圳市信息论与未来网络重点实验室
+ */
+public class FreshnessPeriod implements TlvComponentBase,InitialAble, IEncodingAble {
+    // 成员变量
+    private long freshnessPeriod;
+
+    // 函数
+    public long getFreshnessPeriod() {
+        return this.freshnessPeriod;
+    }
+
+    public void setFreshnessPeriod(long freshnessPeriod) {
+        this.freshnessPeriod = freshnessPeriod;
+    }
+
+    // 接口实现-变量区
+    private boolean initial=false;
+
+    // 接口实现-方法区
+    @Override
+    public void doInitial() {
+        initial=true;
+    }
+
+    @Override
+    public boolean isInitial() {
+        return initial;
+    }
+
+    /**
+     * 将 FreshnessPeriod 线速编码为一个 TLV
+     * @param encoder
+     * @return
+     */
+    @Override
+    public int wireEncode(Encoder encoder) {
+        int totalLength=0;
+
+        // 编码 TLV-VALUE
+        int tmplen=encoder.prependNonNegativeInteger(this.freshnessPeriod);
+        if(tmplen==0){
+            return 0;
+        }
+        totalLength+=tmplen;
+
+        // 编码 TLV-LENGTH
+        tmplen+=encoder.prependVarNumber(new VlInt(totalLength));
+        if(tmplen==0){
+            return 0;
+        }
+        totalLength+=tmplen;
+
+        // 编码 TLV-TYPE
+        tmplen+=encoder.prependVarNumber(new VlInt(TLV.TlvFreshnessPeriod));
+        if(tmplen==0){
+            return 0;
+        }
+        totalLength+=tmplen;
+
+        return totalLength;
+    }
+
+    /**
+     * 从 TLV Block 中解码出一个 FreshnessPeriod
+     * @param block
+     * @return
+     */
+    @Override
+    public boolean wireDecode(Block block) {
+        // 检查 Type 是否正确
+        if(!TLV.expectType(block.getTlvType(),new VlInt(TLV.TlvFreshnessPeriod))){
+            return false;
+        }
+
+        // 读取 FreshnessPeriod
+        long value=TLV.readNonNegativeInteger(block.getValue(),0,block.getLength().getVlIntValue2Int());
+        if(value==0){
+            return false;
+        }
+        this.setFreshnessPeriod(value);
+
+        return true;
+    }
+}