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

Supporting access control list rules that apply to TCP segments belonging to ‘established’ connection
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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