From 40f9b2106a37e67f2713a15e7a6db6cb6cc96c56 Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 9 Dec 2025 00:16:22 +0000
Subject: [PATCH 1/2] Initial plan


From 87979865caa8dfa8f30b7b1e30edc1479dc20b2f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Tue, 9 Dec 2025 00:21:54 +0000
Subject: [PATCH 2/2] Fix Netty Bootstrap connect to resolve hostname
 immediately

Co-authored-by: kevinherron <340273+kevinherron@users.noreply.github.com>
---
 .../modbus/tcp/client/NettyRtuClientTransport.java             | 3 ++-
 .../modbus/tcp/client/NettyTcpClientTransport.java             | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyRtuClientTransport.java b/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyRtuClientTransport.java
index 5fd8966..3a324cc 100644
--- a/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyRtuClientTransport.java
+++ b/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyRtuClientTransport.java
@@ -26,6 +26,7 @@
 import io.netty.handler.ssl.SslContext;
 import io.netty.handler.ssl.SslContextBuilder;
 import io.netty.handler.ssl.SslProtocols;
+import java.net.InetSocketAddress;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionStage;
@@ -248,7 +249,7 @@ protected void initChannel(SocketChannel channel) throws Exception {
       var future = new CompletableFuture<Channel>();
 
       bootstrap
-          .connect(config.hostname(), config.port())
+          .connect(new InetSocketAddress(config.hostname(), config.port()))
           .addListener(
               (ChannelFutureListener)
                   channelFuture -> {
diff --git a/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyTcpClientTransport.java b/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyTcpClientTransport.java
index e91fa49..c9e9e66 100644
--- a/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyTcpClientTransport.java
+++ b/modbus-tcp/src/main/java/com/digitalpetri/modbus/tcp/client/NettyTcpClientTransport.java
@@ -21,6 +21,7 @@
 import io.netty.handler.ssl.SslContextBuilder;
 import io.netty.handler.ssl.SslHandler;
 import io.netty.handler.ssl.SslProtocols;
+import java.net.InetSocketAddress;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.CompletionStage;
@@ -195,7 +196,7 @@ public CompletableFuture<Channel> connect(FsmContext<State, Event> fsmContext) {
       var future = new CompletableFuture<Channel>();
 
       bootstrap
-          .connect(config.hostname(), config.port())
+          .connect(new InetSocketAddress(config.hostname(), config.port()))
           .addListener(
               (ChannelFutureListener)
                   channelFuture -> {