From 4382f9dcbe097b86c957ba028e2bcab6ca384f58 Mon Sep 17 00:00:00 2001
From: Sam Anthony <sam@samanthony.xyz>
Date: Sun, 1 Dec 2024 20:50:33 -0500
Subject: pass NetworkInterface to TotalOrderMulticastReceiver

---
 src/main/java/derms/ReplicaManager.java                |  4 +++-
 src/main/java/derms/net/tomulticast/Receive.java       |  7 +++++++
 .../net/tomulticast/TotalOrderMulticastReceiver.java   | 18 ++++++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/main/java/derms/ReplicaManager.java b/src/main/java/derms/ReplicaManager.java
index 81f8104..9e3a6cc 100644
--- a/src/main/java/derms/ReplicaManager.java
+++ b/src/main/java/derms/ReplicaManager.java
@@ -14,6 +14,7 @@ import derms.replica2.Replica2;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
 import java.net.Socket;
 import java.io.ObjectOutputStream;
 import java.io.ObjectInputStream;
@@ -58,7 +59,8 @@ public class ReplicaManager {
     private void initMulticastReceiver() throws IOException {
         InetSocketAddress group = Config.group;
         InetAddress localAddress = InetAddress.getLocalHost(); // Your local address
-        multicastReceiver = new TotalOrderMulticastReceiver<Request>(group, localAddress);
+        NetworkInterface netInterface = NetworkInterface.getByInetAddress(localAddress);
+        multicastReceiver = new TotalOrderMulticastReceiver<Request>(group, localAddress, netInterface);
 
         new Thread(() -> {
             while (true) {
diff --git a/src/main/java/derms/net/tomulticast/Receive.java b/src/main/java/derms/net/tomulticast/Receive.java
index e89ae1b..6bc2df5 100644
--- a/src/main/java/derms/net/tomulticast/Receive.java
+++ b/src/main/java/derms/net/tomulticast/Receive.java
@@ -5,6 +5,7 @@ import derms.net.MessagePayload;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.PriorityBlockingQueue;
 
@@ -17,6 +18,12 @@ class Receive<T extends MessagePayload> extends TotalOrderMulticast<T> implement
     private final PriorityBlockingQueue<Message<T>> holdback;
     private final BlockingQueue<Message<T>> deliver;
 
+    Receive(InetSocketAddress group, InetAddress laddr, BlockingQueue<Message<T>> deliver, NetworkInterface ifs) throws IOException {
+        super(group, laddr, ifs);
+        this.holdback = new PriorityBlockingQueue<Message<T>>();
+        this.deliver = deliver;
+    }
+
     Receive(InetSocketAddress group, InetAddress laddr, BlockingQueue<Message<T>> deliver) throws IOException {
         super(group, laddr);
         this.holdback = new PriorityBlockingQueue<Message<T>>();
diff --git a/src/main/java/derms/net/tomulticast/TotalOrderMulticastReceiver.java b/src/main/java/derms/net/tomulticast/TotalOrderMulticastReceiver.java
index 549af16..bb0f2d8 100644
--- a/src/main/java/derms/net/tomulticast/TotalOrderMulticastReceiver.java
+++ b/src/main/java/derms/net/tomulticast/TotalOrderMulticastReceiver.java
@@ -6,6 +6,7 @@ import derms.util.ThreadPool;
 import java.io.IOException;
 import java.net.InetAddress;
 import java.net.InetSocketAddress;
+import java.net.NetworkInterface;
 import java.time.Duration;
 import java.util.concurrent.*;
 import java.util.logging.Logger;
@@ -24,6 +25,23 @@ public class TotalOrderMulticastReceiver<T extends MessagePayload> {
      *
      * @param group The IP address and port of the multicast group.
      * @param laddr The IP address of the local process.
+     * @param ifs The network interface to use.
+     */
+    public TotalOrderMulticastReceiver(InetSocketAddress group, InetAddress laddr, NetworkInterface ifs) throws IOException {
+        this.deliver = new LinkedBlockingQueue<Message<T>>();
+        this.log = Logger.getLogger(getClass().getName());
+
+        this.pool = Executors.newSingleThreadExecutor();
+        this.receiver = new Receive<T>(group, laddr, deliver, ifs);
+        pool.execute(receiver);
+    }
+
+    /**
+     * Join the specified totally-ordered multicast group as a receiver using the
+     * default network interface of the machine.
+     *
+     * @param group The IP address and port of the multicast group.
+     * @param laddr The IP address of the local process.
      */
     public TotalOrderMulticastReceiver(InetSocketAddress group, InetAddress laddr) throws IOException {
         this.deliver = new LinkedBlockingQueue<Message<T>>();
-- 
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