【正文】 .........................................................................可能的消息重新發(fā)送 ..............................................................................................................消息完整性 ..............................................................................................................................混亂的消息( ) ..........................................................................................................................消息確認(rèn) ..................................................................................................................................加密 ..........................................................................................................................................會話管理 ..............................................................................................................................................建立會話 ..................................................................................................................................建立連接 ..........................................................................................................................................................身份認(rèn)證 ..........................................................................................................................................................消息同步 ..........................................................................................................................................................消息交換 ..................................................................................................................................注銷會話 ..................................................................................................................................恢復(fù) ......................................................................................................................................................登錄消息處理 ..........................................................................................................................重傳請求消息處理 ..................................................................................................................序號重設(shè)消息處理 ..................................................................................................................三、 消息定義 ................................................................................................................................................消息結(jié)構(gòu) ..............................................................................................................................................消息頭 ......................................................................................................................................消息尾 ......................................................................................................................................管理消息 ..............................................................................................................................................心跳消息（ ）..........................................................................................................................登錄消息（ ）..........................................................................................................................測試請求消息（ ）..................................................................................................................重發(fā)請求消息（ ）..................................................................................................................會話拒絕消息（） ......................................................................................................................序號重設(shè)消息（ ）..................................................................................................................注銷消息（ ）..........................................................................................................................四、 數(shù)據(jù)字典 ................................................................................................................................................數(shù)據(jù)類型 ..............................................................................................................................................V / 42會話層域定義 ......................................................................................................................................附　 錄　 ..............................................................................................................................................................（登錄場景） ...............................................................................................................................................正常登錄場景一 .......................................................................................................................................正常登錄場景二 .......................................................................................................................................正常登錄場景三 .......................................................................................................................................異常登錄場景一 .......................................................................................................................................異常登錄場景二 .......................................................................................................................................附　 錄　 ..............................................................................................................................................................（注銷場景） ...............................................................................................................................................正常注銷場景 ...........................................................................................................................................附　 錄　 ............................................................................