cpp handshake

sender wants to re-transmit the packet upon timeout. Re-sorting: Because IP datagram may be out of order, TCP will re-sort the data and hand it to the application layer in the correct order. Discard duplicate: Because IP datagram may be repeated, TCP will discard duplicate data. Traffic control: both ends of the TCP connection have a fixed buffer space. The TCP receiver only allows the Peer to send data that the local buffer can accommodate. TCP provides traffic control. When both parties in

[Scenario description] The client is started, and the server is started. The client initiates a connection The client sends a packet containing the four bytes of "Hutu" Client disconnection, server disconnection [Process diagram]No picture, no truth! [Socket status change diagram]No picture, no truth! Establish a connection protocol (three-way handshake) (1) the client sends a TCP packet with SYN flag to the server. This is packet 1 during t

Wireshark basic introduction and learning TCP three-way handshake, wiresharktcp This article introduces wireshark, a useful packet capture tool, to obtain network data packets, including http, TCP, UDP, and other network protocol packets. I remember that I learned the TCP three-way handshake protocol when I was in college. At that time, I only knew that although I had read a lot of TCP and UDP materials in

It takes three handshake to establish TCP and four handshake to disconnect. The entire process is shown in the following illustration: The process of establishing a connection:A TCP connection is initialized with a three-time handshake. The purpose of the three handshake is to synchronize the serial number and confir

Partial reprint, speak very wellReprint from here why need "three handshake" In the fourth edition of the "Computer network," The purpose of the "three handshake" is "to prevent the failure of the connection request packet suddenly transmitted to the server, resulting in an error". In another classic computer network, the purpose of the "three-time handshake" is

Dev-CPP/mingw32 Environment Introduction (11) Review above: In the previous article, I introduced you to the installation and Setup of SDL. I hope you will be able to benefit from this, as stated last time. This time we will install the GTK runtime and Development Library. Of course, this is all done under Win32. I hope you will fall in love with this. Chapter 4 download and install GTK GTK? Many may wonder why GTK is required when MFC is available? I

Review above:In the above section, we mainly introduce how to create a custom project in Dev. The structure of the package is briefly introduced later. Next I will complete the preparation of the package. Chapter 2 Dev-CPP package preparation First, let's take a look at the dev-CPP package. The Dev-CPP package has the following features: Of course, I am struc

compiler will define this protector and run the code block compilation! Until you meet #endif. The next time you encounter this protector, you will not run the code block compilation. This mechanism guarantees that the compilation will not be repeated. in practical use, I found that a single CPP file multiple include in the same. h header file or header file several times include a header file, there is no problem. However, this can be problematic w

In the class, I saw the teacher compile the CPP file with Cl commands in the DOS environment. Come back and try it. Wow, I can't help it... In the past, we had to set something called environment variables... Method 1: Find the vc98 \ bin \ vcvars32.bat file in the VC installation directory, open the CMD command prompt, drag it in, and press enter to get it done! However, it seems to be temporary and not verified. It's just fun. After all, the black

Today, the downloaded opencv mixed Gaussian modeling routine encountered the following error: Fatal error c1083: cannot open source file: 'd: \ Program Files \ Microsoft Visual Studio \ vc98 \ MFC \ SRC \ appmodul. CPP' Originally, we created an MFC project. The MFC engineer needs to call the winmain () function, which is placed in appmodul. in the CPP file, the problem here is that the appmodel cannot be

Problem description: Chinese poster-man problem, CPP for short, provides a connected graph and asks the minimum path to be taken after each edge at least once with the same start point and end point. Undirected graph CPP 1. Consider that when all vertices are even numbers, this figure is the European Union, so any Euler's circuit is the answer. 2. when two vertices are odd, you only need to find the shortes

existing object Example: String1.h--Fixed and augmented string class Definition#ifndef String1_h_included#define String1_h_included#include lt;iostream>using std::ostream;using std::istream;class String{private:char * STR; int Len; static int num_strings; static const int CINLIM = 80;public:string (const char * s); String (); String (const string ); Copy constructor ~string (); int length () const {return len;} String operator= (const string ); String operator=

My version is 4.9.9.2. Other versions may be correct, or they may only occur on my computer. I cannot remember it. It seems that it cannot be installed in the "Program Files" file during installation. Due to space, I installed it in the "C:/dev-CPP" directory. At the beginning, I do not know why some projects do not respond when I click the "run" button after compilation. Today, we suddenly found that all the paths are English characters, and Chin

Header file (. h): Write the declaration of a class (including the declaration of members and methods within a class), function prototypes, #define常数等, but generally do not write specific implementations. When writing header files, be aware that the following styles must be added to the beginning and end of the precompiled statement (below): #ifndef circle_h#define Circle_h//your code is written here.#endif This is done to prevent duplicate compilation, and failure to do so can be an err

"iOS development". H,.m,.mm,.cpp and other differencesFile differences:. h: Header file. Header files contain declarations of classes, types, functions, and constants.. m: Source code files. This is a typical source code file extension that can contain objective-c and C code.. MM: Source code files. Source code files with this extension can contain C + + code in addition to the OBJECTIVE-C and C code. This extension is only used when you really need t

Json CPP Chinese support and getting started example, jsoncpp Add the following to each Json Cpp built-in *. cpp file header: #include "stdafx.h" Modify the reference of the built-in header file in Json Cpp to single quotes. For example, the original code of json_reader.cpp is: 1 #include After modification (note the

Just in touch with Python today, in the spirit of practical use, wrote a script that automatically generates a. cpp file and initializes the header file as required.Make sure that you have Python installed in your Linux and copy the following code into a file [FileMaker], right (chmod +x FileMaker)Function:1. FileMaker [file name], which is the generated file name. cpp2. filemaker-e [A-z] generates all letters from A to the letters you enter. CPP3, Fi

(Small white One, can not find the information, the construction process is my own, if there are errors also please Haihan, thank you, at the same time, welcome to the big guys pointed out my flaws. ） Condition: Linux System (64-bit Ubuntu) Cpp-ethereum Source Ethconsole Console 1. Download source code from github, input in Linux terminal git clone--recursive https://github.com/ethereum/cpp-ethereum.git (i

Why do I need a "three-time handshake"?In order to solve the problem of "repeated packet delay in the network", that is, in order to prevent the failed connection request packet suddenly transmitted to the server, resulting in an error.Example: "Invalid connection request message segment" is generated in a situation where the first connection request message segment of the client is not lost, but it is stuck in a network node for a long time, so that

The TCP/IP protocol has a 3-time handshake of 4 disconnects:(Note: SYN is used to establish the connection sck used to confirm that the connection rst is used to reset the connection error)(Listen listening status syn_sent waiting for a matching connection request after sending a connection request syn_received waiting for confirmation of connection request after receiving and sending a connection request established complete connection, can transmit