run the basic process with iscsi driver

citd.go

@@ -19,13 +19,69 @@ package main
 
 import (
 	"net"
+	"os"
+	"reflect"
 
 	"github.com/golang/glog"
+	"github.com/gostor/gotgt/pkg/api"
+	"github.com/gostor/gotgt/pkg/scsi"
 )
 
 func main() {
-	_, err := net.Listen("tcp", ":3260")
+	l, err := net.Listen("tcp", ":3260")
 	if err != nil {
 		glog.Error(err)
+		os.Exit(1)
+	}
+	defer l.Close()
+	t, err := scsi.NewTarget(0, "iscsi", "test-iscsi-target")
+	if err != nil {
+		glog.Error(err)
+		os.Exit(1)
+	}
+	conns := make(map[string]net.Conn)
+
+	for {
+		glog.Info("Listening ...")
+		conn, err := l.Accept()
+		checkError(err, "Accept")
+		glog.Info("Accepting ...")
+		conns[conn.RemoteAddr().String()] = conn
+		// start a new thread to do with this command
+		go Handler(conn, t)
+	}
+}
+
+func checkError(err error, info string) (res bool) {
+
+	if err != nil {
+		glog.Error(info + "  " + err.Error())
+		return false
+	}
+	return true
+}
+
+func Handler(conn net.Conn, tgt *api.SCSITarget) {
+
+	glog.Infof("connection is connected from %s...\n", conn.RemoteAddr().String())
+
+	buf := make([]byte, 1024)
+	for {
+		lenght, err := conn.Read(buf)
+		if checkError(err, "Connection") == false {
+			conn.Close()
+			break
+		}
+		if lenght > 0 {
+			buf[lenght] = 0
+		}
+		v := reflect.ValueOf(tgt.SCSITargetDriver)
+		iscsit := v.MethodByName("ProcessCommand")
+		in := make([]reflect.Value, 1)
+		in[0] = reflect.ValueOf(buf[0:lenght])
+		res := iscsit.Call(in)[0]
+		b := res.Bytes()
+		glog.Infof("%s\n", string(b))
+		conn.Write(b)
 	}
 }