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Description: 计算校验和
校验和算法描述:为保证网络上传输的数据的可靠性,在许多协议中都设置了校验和项,例如:IPv4、ICMPv4、IGMPV4、ICMPv6、UDP和TCP 等等。计算这些校验和的算法称为网际校验和算法,简单来说就是:把被校验的数据16位进行累加,然后取反码,若数据字节长度为奇数,则数据尾部补一个字节的0以凑成偶数。
由于从输入文件读入的数据不能直接满足计算校验和的条件,所以首先对从文件读入缓冲区的数据进行预处理,即读入缓冲区时忽略空格。由于累加是按16位进行的,所以每次从缓冲区中读出4个字符,并将字符转换成对应的16进制数字,如此依次累加,直至数据全部读完。
还有一种情况,即如果数据长度为奇数个字节,则需要判断,并补0累加。程序中利用的是缓冲区长度计数器i和当前读取到计数器j判断数据长度是否为奇数。即如果数据长度为偶数,则读完数据时当前读取到计数器j的值应与缓冲区长度i相等,而如果数据长度为奇数,则读完数据时,当前读取到计数器j>缓冲区长度i,此时需将缓冲区中剩余的两个字符读出,并补0,转换成相应16进制数以后参与累加。
当累加结束后,将累加和的16位以上数据位移下再进行一次累加,并对最后累加和取反即得所求校验和。
-calculated checksum checksum algorithm Description : To ensure the network transmission of data reliability, in many of the agreements are set up and calibration, for example : IPv4, ICMPv4, IGMPV4, ICMPv6. UDP and TCP so on. Calculating checksum algorithm called the Internet checksum algorithm, the simple answer is : as has been the calibration data for 16 cumulative, and then take the anti-code, if the data byte length of the odd, data will make up the tail of a 0 byte to make up even. As the input file is read into the data can not be directly calculated checksum meet the conditions, So, the first right from the document read into the buffer data preprocessing, read into the buffer zone that is overlooked spaces. As the cumulative basis for the 16, so every time from the buffer read out
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Size: 88943 |
Author: 阿蒙 |
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Description: 本备忘录的状态
本文档讲述了一种Internet社区的Internet标准跟踪协议,它需要进一步进行讨论和建议以得到改进。请参考最新版的“Internet正式协议标准”(STD1)来获得本协议的标准化程度和状态。本备忘录的发布不受任何限制。
摘要
本文档描述了对于IPv6的路径MTU探索。它很大程度上是从RFC1191(描述了对于IPv4的路径MTU探索)发展而来的。
目 录
摘 要 1
1 引言 2
2 术语 2
3 协议概述 3
4 协议需求 4
5 执行问题 5
5.1 分层 5
5.2 存储PMTU信息 5
5.3 清除陈旧PMTU信息 7
5.4 TCP层动作 7
-state of the Memorandum of this document on an Internet community of Internet standards Tracking agreement, it needs further discussion and recommendations to be improved. Please refer to the latest edition of the "Internet standards formal agreement" (STD1) to obtain the agreement of standardized way and the degree of state. The memorandum issued without any restrictions. Abstract This document describes the path for IPv6 MTU exploration. It is largely from the RFC1191 (IPv4 description of the path to explore MTU) from the development. Summary Table of Contents Introduction 1 1 2 2 2 3 agreement terms outlined in the agreement needs 3 4 4 5 5 implementation layered 5 5.2 5.1 Information Storage PMTU remove obsolete 5 5.3 7 5.4 Information PMTU TCP Layer 7 moves
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Size: 9966 |
Author: jjj |
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Description: 计算校验和
校验和算法描述:为保证网络上传输的数据的可靠性,在许多协议中都设置了校验和项,例如:IPv4、ICMPv4、IGMPV4、ICMPv6、UDP和TCP 等等。计算这些校验和的算法称为网际校验和算法,简单来说就是:把被校验的数据16位进行累加,然后取反码,若数据字节长度为奇数,则数据尾部补一个字节的0以凑成偶数。
由于从输入文件读入的数据不能直接满足计算校验和的条件,所以首先对从文件读入缓冲区的数据进行预处理,即读入缓冲区时忽略空格。由于累加是按16位进行的,所以每次从缓冲区中读出4个字符,并将字符转换成对应的16进制数字,如此依次累加,直至数据全部读完。
还有一种情况,即如果数据长度为奇数个字节,则需要判断,并补0累加。程序中利用的是缓冲区长度计数器i和当前读取到计数器j判断数据长度是否为奇数。即如果数据长度为偶数,则读完数据时当前读取到计数器j的值应与缓冲区长度i相等,而如果数据长度为奇数,则读完数据时,当前读取到计数器j>缓冲区长度i,此时需将缓冲区中剩余的两个字符读出,并补0,转换成相应16进制数以后参与累加。
当累加结束后,将累加和的16位以上数据位移下再进行一次累加,并对最后累加和取反即得所求校验和。
-calculated checksum checksum algorithm Description : To ensure the network transmission of data reliability, in many of the agreements are set up and calibration, for example : IPv4, ICMPv4, IGMPV4, ICMPv6. UDP and TCP so on. Calculating checksum algorithm called the Internet checksum algorithm, the simple answer is : as has been the calibration data for 16 cumulative, and then take the anti-code, if the data byte length of the odd, data will make up the tail of a 0 byte to make up even. As the input file is read into the data can not be directly calculated checksum meet the conditions, So, the first right from the document read into the buffer data preprocessing, read into the buffer zone that is overlooked spaces. As the cumulative basis for the 16, so every time from the buffer read out
Platform: |
Size: 89088 |
Author: |
Hits:
Description: 本备忘录的状态
本文档讲述了一种Internet社区的Internet标准跟踪协议,它需要进一步进行讨论和建议以得到改进。请参考最新版的“Internet正式协议标准”(STD1)来获得本协议的标准化程度和状态。本备忘录的发布不受任何限制。
摘要
本文档描述了对于IPv6的路径MTU探索。它很大程度上是从RFC1191(描述了对于IPv4的路径MTU探索)发展而来的。
目 录
摘 要 1
1 引言 2
2 术语 2
3 协议概述 3
4 协议需求 4
5 执行问题 5
5.1 分层 5
5.2 存储PMTU信息 5
5.3 清除陈旧PMTU信息 7
5.4 TCP层动作 7
-state of the Memorandum of this document on an Internet community of Internet standards Tracking agreement, it needs further discussion and recommendations to be improved. Please refer to the latest edition of the "Internet standards formal agreement" (STD1) to obtain the agreement of standardized way and the degree of state. The memorandum issued without any restrictions. Abstract This document describes the path for IPv6 MTU exploration. It is largely from the RFC1191 (IPv4 description of the path to explore MTU) from the development. Summary Table of Contents Introduction 1 1 2 2 2 3 agreement terms outlined in the agreement needs 3 4 4 5 5 implementation layered 5 5.2 5.1 Information Storage PMTU remove obsolete 5 5.3 7 5.4 Information PMTU TCP Layer 7 moves
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Size: 9216 |
Author: jjj |
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Description: 本书全面深入地讲述了套接口API网络编程的既成事实标准,对X/open传输接口API也作了广泛的介绍。
本书从对套接口API的综合讨论开始,论述了基本编程内容后,即转入高级套接口编程的相关主题,包括IPv4与IPv6的互操作性;
UNIX域协议、非阻塞I/O、路由套接口、广播、多播、线程、原始套接口、数据链路访向等,
对于客户一服务程序的各种设计方法也作了完整的探讨。在叙述X/Open传输接口API时,
还对记这种设备驱动机制作了深入分析。在附录中又给出了IPv6、ICMPV6、虚拟网络等新内容。
本书内容详尽且具权威性,几乎每章都提供精选的习题,
是计算机和网络专业高年级本科生和研究生的首选教材。本书也可作为网络研究和开发人员的自学教材和参考书。-err
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Size: 28890112 |
Author: sunny |
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Description: 本书全面讲解IPv6及相关协议实现的事实标准KAME,揭示了KAME IPv6协议栈的所有细节,对每行代码到底做了什么以及为什么要这样设计都进行了解释。全书共分7章,分别介绍IPv6地址结构、IPv6、ICMPv6、邻居发现和无状态地址自动配置、传输层协议及套接字API扩展。每章都包含两个主要部分:第一部分提供了作为RFC发布的主要协议规范的摘要,定义各种协议分组,解释每个分组中每个字段的含义和目的;第二部分则描述实现这些RFC的KAME的数据结构及功能。书的最后还提供了一些例子,说明如何编写既可以在IPv4网络上运行、又可以在IPv6网络上运行的可移植应用程序。.
本书是IPv6的权威参考书,适合网络设计和开发人员阅读。此外,本书还适合作为高校相关专业网络课程的教学参考书。-This book fully explain the IPv6 and related protocols, the de facto standard KAME, reveals the KAME IPv6 protocol stack all the details on each and every line of code in the end did what and why to be so designed to have carried out an explanation. The book is divided into seven chapters, describing the structure of IPv6 addresses, IPv6, ICMPv6, neighbor discovery and stateless address autoconfiguration, Transport Layer and the socket API extensions. Each chapter contains two main parts: the first part provides as RFC published a summary of the main protocol specification, defining a variety of protocols grouped in each group to explain the meaning and purpose of each field second part describes the to achieve these RFC s KAME data structure and functions. End of the book also provides some examples to illustrate how to write both in IPv4 networks running IPv6 networks and can run in portable applications. .
This book is an authoritative reference IPv6 for network designers and d
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Size: 7183360 |
Author: 薛 |
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Description: implementaion of icmp porotocol compatible with ipv6
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Size: 3072 |
Author: pouria |
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Description: 本书全面深入地讲述了套接口API网络编程的既成事实标准,对X/open传输接口API也作了广泛的介绍。本书从对套接口API的综合讨论开始,论述了基本编程内容后,即转入高级套接口编程的相关主题,包括IPv4与IPv6的互操作性;UNIX域协议、非阻塞I/O、路由套接口、广播、多播、线程、原始套接口、数据链路访向等,对于客户一服务程序的各种设计方法也作了完整的探讨。在叙述X/Open传输接口API时,还对记这种设备驱动机制作了深入分析。在附录中又给出了IPv6、ICMPV6、虚拟网络等新内容。
-This book tells the story of the comprehensive set of apis interface is already the case of network programming standards, for X/open transport interface are widely API is introduced. This book from the API interfaces to set of comprehensive discussion began, discusses the basic programming content, that is, into the senior set after the programming interface topics, including IPv4 and IPv6 interoperability UNIX domain agreement, the jam the I/O, and route set of interfaces, radio, multicast, thread, the original set of interface, the data link to visit for a customer service program design method of also made a complete discussion. In the narrative X/Open transport interface, also to remember API the device driver mechanism for further analysis. And put in an appendix IPv6, ICMPV6, virtual network, the new content.
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Size: 27974656 |
Author: lion |
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Description: Internet Control Message Protocol (ICMPv6) Linux INET6 implementation
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Size: 7168 |
Author: runnuerue |
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Description: 介绍了网络分析的基础知识和原理,wireshark工具的使用以及网络包分析的方法。
Chapter 1: The World of Network Analysis
Chapter 2: Introduction to Wireshark
Chapter 3: Capture Traffic
Chapter 4: Create and Apply Capture Filters
Chapter 5: Define Global and Personal Preferences
Chapter 6: Colorize Traffic
Chapter 7: Define Time Values and Interpret Summaries
Chapter 8: Interpret Basic Trace File Statistics
Chapter 9: Create and Apply Display Filters
Chapter 10: Follow Streams and Reassemble Data
Chapter 11: Customize Wireshark Profiles
Chapter 12: Annotate, Save, Export and Print Packets
Chapter 13: Use Wireshark’s Expert System
Chapter 14: TCP/IP Analysis Overview
Chapter 15: Analyze Domain Name System (DNS) Traffic
Chapter 16: Analyze Address Resolution Protocol (ARP) Traffic
Chapter 17: Analyze Internet Protocol (IPv4/IPv6) Traffic
Chapter 18: Analyze Internet Control Message Protocol (ICMPv4/ICMPV6) Traffic
Chapter 19: Analyze User Datagram Protocol (UDP) Traffic
Chapter 20: Analyze Transmission Control Protocol (TCP) Traffic
Chapter 21: Graph IO Rates and TCP Trends
Chapter 22: Analyze Dynamic Host Configuration Protocol (DHCPv4/DHCPv6) Traffic
Chapter 23: Analyze Hypertext Transfer Protocol (HTTP) Traffic
Chapter 24: Analyze File Transfer Protocol (FTP) Traffic
Chapter 25: Analyze Email Traffic
Chapter 26: Introduction to 802.11 (WLAN) Analysis
Chapter 27: Introduction to Voice over IP (VoIP) Analysis
Chapter 28: Baseline "Normal" Traffic Patterns
Chapter 29: Find the Top Causes of Performance Problems
Chapter 30: Network Forensics Overview
Chapter 31: Detect Network Scanning and Discovery Processes
Chapter 32: Analyze Suspect Traffic
Chapter 33: Effective Use of Command Line Tools
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Size: 9437184 |
Author: windtear_pp@163.com |
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Description: Driver for Cirrus Logic CS4281 based PCI soundcard.
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Size: 16384 |
Author: lngkrz |
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Description: ICMPv6 tracking for Linux v2.13.6.
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Size: 14336 |
Author: tqqjbr |
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Description: ICMPv6 header, RFC 4443 Section 2.1.
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Size: 9216 |
Author: suncouku |
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Description: Keystone accumulator queue manager.
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Size: 6144 |
Author: 景子瑜 |
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Description: Xorg driver exported structures.
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Size: 4096 |
Author: jounangmao |
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Description: Initialize a new mmu context. This is invoked when a new address space instance (unique or shared) is instantiated.
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Size: 2048 |
Author: hiefousf |
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