refactoring: Tiny refactoring (#47)

* tiny refactoring name convention, and file name.

* added command line arguments files

* fix typo comment

protocols/strategies/tcp.go

@@ -0,0 +1,58 @@
+package strategies
+
+import (
+	"beelzebub/parser"
+	"beelzebub/tracer"
+	"fmt"
+	"net"
+	"time"
+
+	"github.com/google/uuid"
+	log "github.com/sirupsen/logrus"
+)
+
+type TCPStrategy struct {
+}
+
+func (tcpStrategy *TCPStrategy) Init(beelzebubServiceConfiguration parser.BeelzebubServiceConfiguration, tr tracer.Tracer) error {
+	listen, err := net.Listen("tcp", beelzebubServiceConfiguration.Address)
+	if err != nil {
+		log.Errorf("Error during init TCP Protocol: %s", err.Error())
+		return err
+	}
+
+	go func() {
+		for {
+			if conn, err := listen.Accept(); err == nil {
+				go func() {
+					conn.SetDeadline(time.Now().Add(time.Duration(beelzebubServiceConfiguration.DeadlineTimeoutSeconds) * time.Second))
+					conn.Write([]byte(fmt.Sprintf("%s\n", beelzebubServiceConfiguration.Banner)))
+
+					buffer := make([]byte, 1024)
+					command := ""
+
+					if n, err := conn.Read(buffer); err == nil {
+						command = string(buffer[:n])
+					}
+
+					tr.TraceEvent(tracer.Event{
+						Msg:         "New TCP attempt",
+						Protocol:    tracer.TCP.String(),
+						Command:     command,
+						Status:      tracer.Stateless.String(),
+						RemoteAddr:  conn.RemoteAddr().String(),
+						ID:          uuid.New().String(),
+						Description: beelzebubServiceConfiguration.Description,
+					})
+					conn.Close()
+				}()
+			}
+		}
+	}()
+
+	log.WithFields(log.Fields{
+		"port":   beelzebubServiceConfiguration.Address,
+		"banner": beelzebubServiceConfiguration.Banner,
+	}).Infof("Init service %s", beelzebubServiceConfiguration.Protocol)
+	return nil
+}