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    Method and apparatus for performing internet network address translation
    1.
    发明授权
    Method and apparatus for performing internet network address translation 有权
    用于执行因特网网络地址转换的方法和装置

    公开(公告)号：US06457061B1

    公开(公告)日：2002-09-24

    申请号：US09199839

    申请日：1998-11-24

    申请人： Subhash Bal ,  Raghunath Iyer ,  Sundar Iyer

    发明人： Subhash Bal ,  Raghunath Iyer ,  Sundar Iyer

    IPC分类号： G06F1516

    CPC分类号： H04L29/12377 ,  H04L29/12009 ,  H04L29/12481 ,  H04L61/2517 ,  H04L61/2557

    摘要： A method and apparatus for performing network address translation is disclosed. The method generates statistically unique port number for each outgoing connection. The statistically unique port numbers are formed from a subset of bits from the source node's IP address and a subset of bits from the port number assigned by the source node. The statistically unique port number is used as an index into a table containing connection information. When a statistically unique port number fails to be absolutely unique, the method uses a secondary fallback system that generates a unique port number by using sequential numbering system. The information about the connections using unique port numbers that were generated sequentially is stored in a secondary connection table. The secondary connection table is organized as a Patricia tree.

    摘要翻译： 公开了一种用于执行网络地址转换的方法和装置。 该方法为每个传出连接生成统计唯一的端口号。 统计唯一的端口号由来自源节点的IP地址的位的子集以及由源节点分配的端口号的位的子集形成。 统计唯一的端口号用作包含连接信息的表的索引。 当统计唯一的端口号不能绝对唯一时，该方法使用辅助回退系统，通过使用顺序编号系统生成唯一的端口号。 关于使用连续生成的唯一端口号的连接的信息存储在辅助连接表中。 辅助连接表被组织为Patricia树。