init

.gitignore

@@ -0,0 +1 @@
+.idea

cmd/smoketest.go

@@ -0,0 +1,42 @@
+package cmd
+
+import (
+	"fmt"
+	"net"
+	"os"
+)
+
+const (
+	connHost = "localhost"
+	connPort = "3030"
+	connType = "tcp"
+)
+
+func main() {
+	l, err := net.Listen(connType, connHost+":"+connPort)
+	if err != nil {
+		fmt.Printf("net.Listen fail: %v\n", err)
+		os.Exit(1)
+	}
+	defer l.Close()
+
+	fmt.Println(fmt.Sprintf("Listening on %s:%s", connHost, connPort))
+
+	for {
+		conn, err := l.Accept()
+		if err != nil {
+			fmt.Printf("Error accepting: %v\n", err)
+		}
+		go handleRequest(conn)
+	}
+}
+
+func handleRequest(conn net.Conn) {
+	buf := make([]byte, 1024)
+	_, err := conn.Read(buf)
+	if err != nil {
+		fmt.Printf("Error reading: %v\n", err)
+	}
+	conn.Write(buf)
+	conn.Close()
+}

go.mod

@@ -0,0 +1,3 @@
+module protohackers
+
+go 1.19