gethostname

First, the basic knowledge1.TCP2.UDPSecond, IP address encapsulationCommon methods for 1.InetAddress classesGetlocalhost () returns the InetAddress object of the local host inetaddress type Getbyname (String host)

Some of these functions work exactly the same way, except for different parameters. (maybe a lot of familiar C + + friends can immediately associate with the function overload, but do not forget that the Linux core is written in C, so it can only be

SYS.C Code AnalysisSetregid/* * This is do bsd-style, with no consideration of the saved GID, except * so if you set the effective GID, it sets t He saved GID too. This * makes it possible for a setgid-completely drop its privileges, * which is

Package COM.GW;Import java.io.IOException;Import Java.io.InputStream;Import org.apache.hadoop.conf.Configuration;Import Org.apache.hadoop.fs.FSDataInputStream;Import Org.apache.hadoop.fs.FSDataOutputStream;Import

IdeasThe main thread is responsible for sending messages, and the other thread is responsible for receiving messages. This is true for both the server and the client.AttentionThe port will not be shut down immediately after a party closes the socket

Java provides java.net packages for network support, and classes such as URLs and URLConnection under the package provide programmatic access to Web services, while Urldecoder and Urlencoder provide ordinary strings and appliction/

I. Overview of network programmingNetwork programming refers to writing programs that run on multiple devices (computers) that are connected through the network.The J2SE API in the java.net package contains classes and interfaces that provide

The simplest way to connect a server with a socket is to use the IP and port directly, but the Connect method in the socket class does not provide this way, but instead uses the SocketAddress class to pass the server's IP and port to the Connect

#include #include//This header file needs to be preceded by Windows.h#include #includestring>#include#pragmaComment (lib, "Ws2_32.lib")using namespacestd;voidGetIP () {wsadata wsadata; //the WSADATA structure is used to store the Windows Sockets

UDP/TCP-based Socket programming demoUDP Client/serverA simple UDP protocol-based process communication for client and server applications.Logic:The client sends a lowercase English letter to the server, the server accepts it, converts it to

The UDP server is not connection-oriented, so you do not have to do as many setup work as a TCP server. In fact, there's no need to set anything, just wait for the connection to come in.SS = socket () # Create a server Socket

The program originates from the Linux programming book, which is used by individuals to learn from this book as a knowledge point.Here we introduce several structures: 1234567

Http://blog.chinaunix.net/uid-20733992-id-3450058.htmlThe original address: Linux socket programming yulianliu1218Socket programming under LinuxWhat is a socketThe socket interface is a TCP/IP network Api,socket interface that defines many functions

This article refers to the first chapter of Python network programmingImport socketHelp (socket)Functions:Socket ()--Create a new socket objectSocketpair ()--Create a pair of new socket objects [*]FROMFD ()--Create a socket object from an open file

the bot proxy IP is provided by the Sesame HTTP service providerUse Python code to collect system information for hosts, mainly: hostname, IP, system version, server manufacturer, model, serial number, CPU information, memory and other system

This article supporting source code The essence of the VC knowledge Base and the previous online magazines are described in detail in this age-old problem. The approach provided in this article is a more complete solution with detailed

Function: Query native IP/MAC address, filter out 127.0.0.1 loop-back addressFor: Linux, Ubuntu 16.04 Debug Pass#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include

Open Internet Reference ModelOsiApplication LayerPresentation LayerSession LayerTransport layer Disorderly rearrangement, re-request packetNetwork layerData Link Layer Data framePhysical layer bit streamTCP/IP four layer modelApplication-level FTP

This article lists the most common Linux system calls, with a brief Chinese description.The following is a list of Linux system calls that contain most of the common system calls and functions derived from system calls. This is probably the only

Using Linux to implement TCP-mode-based network chat programsThe two main components are: Server and client. The server program is primarily responsible for listening to messages sent by the client. The client needs to log on to the