header length

IPv4 (Internel protocol) head #include struct IPHDR {#if defined (__little_endian_bitfield) __u8 ihl:4,version:4; #elif defined (__b Ig_endian_bitfield) __u8 Version:4,ihl:4; #else #error "Please fix " #endif __u8 tos; __be16-tot_len; __be16-id; __

1. TCP three-way handshake The client sends a SYN request to the server to establish a connection packet. After receiving the request, the server sends an ACK to confirm receiving the SYN packet from the client. Then, the server sends the SYN packet,

    Version 1 domain: indicates the IP protocol corresponding to the datagram. Currently, it is 4 (representing IPv4, but IPv6 may have to replace IPv4) 2 Header Length: 4 bits, IP header length, indicating the number of 32 bits contained in the

Antpower All Rights Reserved 2003 Technical Articles Http://www.antpower.org 1st pages 14 pages Antpower-Technical article Introduction to three common IP packet sending tools Lang Guojun, an ambitious member of

IP subnet addressing All Hosts must support subnet addressing (rfc950 [mogulandpostel1985]). IThe P address is simply composed of a network number and a host number. Instead, the host number is divided into a sub-network number and a host number.The

You may have heard of the TCP/IP protocol. Do you know what TCP is and what Ip is? In this chapter, we will learn about the most widely used protocol on the network. 7.1 network transmission layeringIf you have passed the computer grade examination,

I recently want to develop a program. The data source is DBF. I used Java to parse it and found that there was a problem. I found the relevant information online, I found that the structure of this document would be quite detailed, and it would help

Http://blog.csdn.net/ithomer/article/details/5662383 Both IP and TCP are 20 bytes. The IP address is used as the storage port of TCP. TCP also stores some content for specific TCP Protocols, serial numbers, and validation numbers. // I386 is little_

OverviewBefore understanding the advanced rules of tcpdump, it is necessary to have a general understanding of IP, TCP and UDP headers, in fact many network tools are used based on the structure of the message header to do the corresponding

TCP/IP basic Knowledge Network TCP/IPIntroductionThis article is the basic knowledge of TCP/IP protocol, focusing on the content of TCP/IP protocol cluster, the role of TCP, UDP, IP three common network protocols related to the basic

One; prefaceThe people who have learned the TCP/IP protocol have a feeling, this thing is too abstract, there is no data instance, after reading soon forget. This article will introduce an intuitive learning method, using the Protocol analysis tool

I. IP address data packet structure: The fields are described as follows: 1, version: version number, 4 bits, indicates the version of the IP protocol. 2, header length: header length, 4 bits, unit: 4 bytes, so the maximum length is 4*(2 ^ 4-1) =

The length of The ip_datamaki header. This post was last edited by TomodaMaki from 2013-01-0716: 04: 34 TCPIP & nbsp; effecstrated & nbsp; Chapter 3, Chapter 1, Section 2 The & nbsp; header & nbsp; length & nbsp; is & nbsp; the & nbsp; number & nbsp;

(20:36:49)Reprinted tokenTags: MiscellaneousCategory: ProfessionalThe first is the tcpdump file format.When you use the tcpdump command to capture data packets in Windows or Linux, you will get the tcpdump file in the following format:File header |

[Creation time: 2015-08-27-22:15:17]NetanalyzerWe reviewed the Netanalyzer some of the optional history, in this article, I decided not to introduce Netanalyzer, but first to understand some of the basic knowledge of building netanalyzer, such as

The length of the head of the Ip_datagram This post was last edited by Tomodamaki on 2013-01-07 16:04:34 TCP/IP Illustrated first Volume chapter III second sectionThe header length is the number of 32-bit words in the header, and the including any

Structure Analysis of TCP/IP protocol header // i386 is little_endian. # ifndef LITTLE_ENDIAN # define LITTLE_ENDIAN (1) // byte order # else # error Redefine LITTLE_ORDER # endif // Mac header, total length 14 bytes typedef struct _ eth_hdr

Network Layer 2 (IPv4 and IPv6 addresses and related protocols) IP (internet protocol) protocol is the core protocol of the TCP/IP protocol family and the network layer of the internet. The current version number is 4, also known as IPv4. The next

1. Definition:The TCP/IP model is also known as the DoD model (Department of Defense models). TCP/IP literally represents two protocols: TCP (Transmission Control Protocol) and IP (Internetwork protocol).The TCP/IP protocol is not a collectively

Most programmers have two types of sockets:(1) stream Socket (SOCK_STREAM): a connection-oriented Socket for connection-oriented TCP Service applications;(2) datagram Socket (SOCK_DGRAM): a connectionless Socket that corresponds to a connectionless