CNSL-124 Generate random UUID if the client id is missing when connec…

…ting in MQTT

pkg/session/stream.go

@@ -13,6 +13,7 @@ import (
 	"net"
 
 	"github.com/eclipse/paho.mqtt.golang/packets"
+	"github.com/google/uuid"
 )
 
 type Direction int
@@ -103,6 +104,15 @@ func authorize(ctx context.Context, pkt packets.ControlPacket, h Handler) error
 			s.Password = p.Password
 		}
 
+		// If the client ID is empty, generate a random one.
+		if s.ID == "" {
+			id, err := uuid.NewUUID()
+			if err != nil {
+				return err
+			}
+			s.ID = id.String()
+		}
+
 		ctx = NewContext(ctx, s)
 		if err := h.AuthConnect(ctx); err != nil {
 			return err