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    • 1. 发明授权
    • Scalably detecting and blocking signatures at high speeds
    • 可高速检测和阻止签名
    • US07602780B2
    • 2009-10-13
    • US11271310
    • 2005-11-09
    • Sushil Kumar SinghGeorge VargheseJohn David HuberSumeet Singh
    • Sushil Kumar SinghGeorge VargheseJohn David HuberSumeet Singh
    • H04L12/56
    • H04L45/00H04L45/60H04L45/745H04L63/145H04L67/327
    • A method and apparatus is described for identifying content in a packet. The method may obtain data sample from the packet where the data sample is in a predetermined window at an initial offset point in the packet. For each offset point, a first stage of processing on the data sample may be performed to identify if the data sample corresponds to potentially relevant reference string. A more focused second stage of processing may then be carried out on the data sample to identify if the data sample corresponds to potentially relevant reference string. Thereafter, an even more focused third stage of processing may be carried out on the data sample to obtain a third stage result. If the data sample passes all three stages of processing, a predefined action is identified which is associated with a reference string corresponding to the data sample.
    • 描述了用于识别分组中的内容的方法和装置。 该方法可以从分组中的初始偏移点处的数据样本在预定窗口中获取数据样本。 对于每个偏移点,可以执行关于数据样本的第一级处理以识别数据样本是否对应于潜在相关的参考串。 然后可以对数据样本执行更集中的第二阶段处理,以识别数据样本是否对应于潜在相关的参考字符串。 此后,可以对数据样本进行更加集中的第三阶段处理,以获得第三阶段结果。 如果数据样本通过所有三个处理阶段,则识别与对应于数据样本的参考串相关联的预定义动作。
    • 4. 发明授权
    • Method and apparatus to scale and unroll an incremental hash function
    • 扩展和展开增量散列函数的方法和装置
    • US07783688B2
    • 2010-08-24
    • US11271134
    • 2005-11-09
    • John David Huber
    • John David Huber
    • G06F7/00G06F17/30G06F17/00
    • H04L63/145H04L63/0245Y10S707/99938
    • A method and apparatus speeding up an incremental hash function is described. The method may comprise receiving a data string including a plurality of N data samples and, as each data sample is received, multiplying the data samples to obtain data sample multiplication results and multiplying a current hash value by a constant to obtain a hash multiplication result. Thereafter, the data sample multiplication results are added to the hash multiplication result to obtain new current hash values and a hash value of the data string is defined as the new hash value. In an embodiment, a moving window of length wl may be defined and data samples that were received wl to wl+N bytes previously may be multiplied with the constant raised to the power of w to wl+Nl to obtain n subtraction results.
    • 描述了加速增量散列函数的方法和装置。 该方法可以包括接收包括多个N个数据样本的数据串,并且当接收到每个数据样本时,将数据样本相乘以获得数据样本相乘结果,并将当前散列值乘以常数以获得散列乘法结果。 此后,将数据样本相乘结果添加到散列乘法结果以获得新的当前散列值,并将数据串的散列值定义为新的散列值。 在一个实施例中,可以定义长度为w1的移动窗口,并且可以将先前接收到w1至w1 + N个字节的数据样本与增加到w1 + N1的功率的常数相乘以获得n个减法结果。
    • 7. 发明授权
    • System and method for communicating switch fabric control information
    • 交换架构控制信息的系统和方法
    • US07298739B1
    • 2007-11-20
    • US10378403
    • 2003-03-03
    • Kirk Alvin MillerPhilip Michael ClovisJohn David HuberKenneth Yi YunPeter John HolzerJohn Calvin Leung
    • Kirk Alvin MillerPhilip Michael ClovisJohn David HuberKenneth Yi YunPeter John HolzerJohn Calvin Leung
    • H04L12/50
    • H04L12/5601H04L49/106H04L2012/5665H04L2012/5675
    • A system and method are provided for communicating control information in a switch fabric. The method comprises: on a switch card, establishing a plurality of crossbars controlled by an arbiter; initiating a control message; and, distributing the control message on a switch card token bus connecting the crossbars and arbiter elements. Distributing the control message on a switch card token bus connecting the crossbar and arbiter elements includes daisy-chain connecting the elements with a cyclical bus. In some aspects of the method, establishing a plurality of crossbars controlled by an arbiter includes identifying each element with a unique address. Then, initiating a control message includes initiating a control message with an attached address. Distributing the control message on a switch card token bus includes the substeps of: daisy-chain passing the control message between elements; and, terminating the message at an element having an address matching the address attached to the control message.
    • 提供了一种用于在交换结构中传送控制信息的系统和方法。 该方法包括:在交换卡上建立由仲裁器控制的多个交叉条; 启动控制消息; 并且将控制消息分发到连接十字路口和仲裁器元件的交换机卡令牌总线上。 在连接横杆和仲裁器元件的开关卡令牌总线上分配控制消息包括将元件与循环总线进行菊花链连接。 在该方法的一些方面,建立由仲裁器控制的多个十字条包括用唯一地址识别每个元件。 然后,启动控制消息包括发起具有附加地址的控制消息。 在交换机卡令牌总线上分发控制消息包括以下子步骤:菊花链在元素之间传递控制消息; 并且在具有与附加到控制消息的地址匹配的地址的元素处终止该消息。
    • 8. 发明授权
    • Minimum latency cut-through switch fabric
    • 最小延迟直通交换矩阵
    • US07230947B1
    • 2007-06-12
    • US10378502
    • 2003-03-03
    • John David HuberKirk Alvin MillerMichael John HellmerKenneth Yi YunKevin Warren JamesGeorge Beshara Bendak
    • John David HuberKirk Alvin MillerMichael John HellmerKenneth Yi YunKevin Warren JamesGeorge Beshara Bendak
    • H04Q11/00
    • H04L12/5601H04L49/106H04L2012/5665H04L2012/5675
    • A system and method are provided for cut-through packet routing in a packet communications switch fabric. The method comprises: accepting information packets addressed to a plurality of output port card egress ports at an input port card ingress port; routing information packets between port cards on backplane data links through an intervening crossbar; maintaining a credit counter for each port card egress destination, at the input port card; decrementing the counter in response to transmitting cells in a packet from the input port card; and, incrementing the counter in response to transmitting cells from the packet at the output port card. In some aspects of the method, accepting information includes buffering the packets in an ingress memory subsystem (iMS). Routing information includes the iMS transmitting buffered packets on a selected backplane data link. Decrementing the counter includes the iMS communicating with the iPQ in response to transmitting a cell.
    • 提供了一种用于分组通信交换结构中的直通分组路由的系统和方法。 该方法包括:接收寻址到输入端口卡入口的多个输出端口卡出口端口的信息包; 在背板数据链路上的端口卡之间通过插入的交叉开关路由信息包; 在输入端口卡上维护每个端口卡出口目的地的信用计数器; 响应于来自输入端口卡的分组中的传输小区而递减计数器; 并且响应于从输出端口卡处的分组发送小区而递增计数器。 在该方法的某些方面,接收信息包括缓冲入口存储器子系统(iMS)中的分组。 路由信息包括在选定的背板数据链路上发送缓冲的分组的iMS。 减少计数器包括响应于传输单元而与iPQ通信的iMS。