From e76e2fdeb1ae68ec47032ac57d6604d3f9dbd95a Mon Sep 17 00:00:00 2001
From: Mikael Magnusson <mikma@users.sourceforge.net>
Date: Tue, 6 Jun 2023 23:25:01 +0200
Subject: WIP: use lease Duration and Instan

---
 .../java/com/wireguard/android/backend/Dhcp.java   | 22 +++++++++++++++-------
 .../com/wireguard/android/backend/GoBackend.java   |  6 +++++-
 2 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/tunnel/src/main/java/com/wireguard/android/backend/Dhcp.java b/tunnel/src/main/java/com/wireguard/android/backend/Dhcp.java
index 4cb2a5a0..c4043625 100644
--- a/tunnel/src/main/java/com/wireguard/android/backend/Dhcp.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/Dhcp.java
@@ -8,6 +8,8 @@ package com.wireguard.android.backend;
 import com.wireguard.config.InetNetwork;
 import com.wireguard.util.NonNullForAll;
 
+import java.time.Duration;
+import java.time.Instant;
 import java.util.LinkedHashSet;
 import java.util.Set;
 
@@ -20,13 +22,19 @@ public class Dhcp {
 
     public class Lease {
         private InetNetwork address;
-        private long valid;
-        private long preferred;
+        private Duration validLt;
+        private Duration preferredLt;
+        private Instant validTs;
+        private Instant preferredTs;
 
-        public Lease(InetNetwork address, long valid, long preferred) {
+        public Lease(InetNetwork address, Duration validLt, Duration preferredLt) {
             this.address = address;
-            this.valid = valid;
-            this.preferred = preferred;
+            this.validLt = validLt;
+            this.preferredLt = preferredLt;
+
+            Instant now = Instant.now();
+            this.validTs = now.plus(validLt);
+            this.preferredTs = now.plus(preferredLt);
         }
 
         public final InetNetwork getAddress() {
@@ -34,11 +42,11 @@ public class Dhcp {
         }
 
         public String toString() {
-            return address.toString() + " (valid " + this.valid + "s, preferred " + this.preferred + "s)";
+            return address.toString() + " (valid " + this.validTs + "s, preferred " + this.preferredTs + "s)";
         }
     }
 
-    public void addLease(InetNetwork address, long valid, long preferred) {
+    public void addLease(InetNetwork address, Duration valid, Duration preferred) {
         this.leases.add(new Lease(address, valid, preferred));
     }
 
diff --git a/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java b/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
index 040a316d..6695c81e 100644
--- a/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
+++ b/tunnel/src/main/java/com/wireguard/android/backend/GoBackend.java
@@ -78,6 +78,7 @@ import java.net.Inet6Address;
 import java.net.InetSocketAddress;
 import java.net.UnknownHostException;
 import java.net.URL;
+import java.time.Duration;
 import java.time.Instant;
 import java.nio.ByteOrder;
 import java.util.Collections;
@@ -433,7 +434,9 @@ public final class GoBackend implements Backend {
                 try {
                     InetAddress addr = InetAddress.getByAddress(lease.getAddress().getAddress().toByteArray());
                     Log.i(TAG, "Lease: " + addr + " " + lease.getValidLifetime().getSeconds() + " " + lease.getPreferredLifetime().getSeconds());
-                    dhcp.addLease(new InetNetwork(addr, 128), lease.getValidLifetime().getSeconds(), lease.getPreferredLifetime().getSeconds());
+                    dhcp.addLease(new InetNetwork(addr, 128),
+                                  Duration.ofSeconds(lease.getValidLifetime().getSeconds(), lease.getValidLifetime().getNanos()),
+                                  Duration.ofSeconds(lease.getPreferredLifetime().getSeconds(), lease.getPreferredLifetime().getNanos()));
                 } catch (UnknownHostException ex) {
                     // Ignore
                 }
@@ -463,6 +466,7 @@ public final class GoBackend implements Backend {
 
         // TODO fetch expiration time from Dhcp leases
         long delayMillis = 1000 * 3600 * 12 * 3 / 4; // Renew 3/4 * 12h
+        //long delayMillis = lease.getValidLifetime().getSeconds() * 1000 + lease.getValidLifetime().getNanos() / 1000;
         handler.sendMessageDelayed(msg, delayMillis);
 
         bgp = new Bgp(this, channel, currentTunnel, currentTunnelHandle);
-- 
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