发明授权
US09497119B2 Supporting access control list rules that apply to TCP segments belonging to ‘established’ connection
有权
支持适用于属于“已建立”连接的TCP段的访问控制列表规则
- 专利标题: Supporting access control list rules that apply to TCP segments belonging to ‘established’ connection
- 专利标题(中): 支持适用于属于“已建立”连接的TCP段的访问控制列表规则
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申请号: US14284811申请日: 2014-05-22
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公开(公告)号: US09497119B2公开(公告)日: 2016-11-15
- 发明人: Claude Basso , Joseph A. Kirscht , Natarajan Vaidhyanathan
- 申请人: International Business Machines Corporation
- 申请人地址: US NY Armonk
- 专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人地址: US NY Armonk
- 代理机构: Patterson + Sheridan, LLP
- 主分类号: H04L12/743
- IPC分类号: H04L12/743 ; H04L12/26 ; H04L12/801 ; H04L29/06 ; H04L12/46
摘要:
Embodiments presented herein provide a TCAM-based access control list that supports disjunction operations in rules. According to one embodiment, a numeric range table is tied to the access control list. Each entry in the numeric range table includes an encode field that provides for scanning TCP flags in a TCP header of an incoming Ethernet frame. Further, each entry provides a first mask and a second mask used to test for desired set and unset TCP flags in a given frame. Each entry also provides an operation field that performs a disjunction operation that compares the first mask, the second mask, and set TCP flags in a given frame.
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