socket 939

The address data structure of the socket has different forms depending on the system and the network environment. In order for the different format addresses to be passed into the socket function, the address structure must be forced to be converted to: struct sockaddr{ sa_family_t sa_family;/* address family*/ char sa_data[];/* Variable-length address*/ ... }; The

0. nc-lk Port number : always listen for data on this port on the local computer .1. Import three header files { #import #import #import } 2. Socket writing steps {1. Create client socket socket ( c8> 2. Create a server Socket struct sockaddr_in serveraddr ESS; 3. Connect to the server (

In the article Java Socket Chat room programming (i) the use of socket to implement chat message push we talked about how to use the socket to allow the server and the client to pass messages between the message to achieve the purpose of the push message, and then I will write out how to let the server establish client and client communication. In fact, it is to

The simple explanation is:Short connection: Establish a connection, send a packet, close the connectionLong connection: Establish a connection, send a packet, send a heartbeat packet, send a packet, send a heartbeat packet, send a heartbeat packet ...So with frequent data transmission, a short connection creates a TCP connection frequently, and for long connections, the same TCP connection is always usedPackage Com.tree.demo.socket;import Java.io.ioexception;import Java.io.inputstream;import jav

The simple explanation is: Short connection: Establish a connection, send a packet, close the connection Long connection: Establish a connection, send a packet, send a heartbeat packet, send a packet, send a heartbeat packet, send a heartbeat packet ... Therefore, frequent data sending and receiving, the short connection will frequently create a TCP connection, and for long connections, always use the same TCP connection Package com.tree.demo.socket; Import java.io.IOException; Import Java.io

Socket address In Java, you can use the host name or host address to identify a network address, for example, www.baidu.com and 115.239.210.26, but the host name must be resolved to a digital address for Communication (DNS ), this process will take a certain amount of time, so we generally use a digital address in the program. In Java, inetaddress represents a network destination address, including host name and number address information. It has two

Image Description of the SOCKET protocol The original meaning of socket is "hole" or "socket ". Here we use the 4bds UNIX Process Information mechanism, take the latter meaning. Socket is very similar to a telephone outlet. Take a national-level telephone network as an example. The two sides of a telephone call are equ

Client PackageCom.swift.jinji;ImportJava.io.FileInputStream;Importjava.io.IOException;ImportJava.io.InputStream;ImportJava.io.OutputStream;ImportJava.net.Socket;/*Project requirements: Using the socket to write a Java program, requires: the implementation of the client to upload files to the server, that is, the client to read the local text file, the file sent to the server, the server will receive the content into a text file. */ Public classuploadc

Summary of Socket-based simple chat tools (original) and socket chat tools During this time, I can't help but try to write a summary to encourage myself to study hard and write poorly. Please advise me! The following is a simple program for sending messages and files. First, the server needs to prepare two sockets and two threads as follows: // Communicate with the client private

PHP socket connects to the server template, socket server. When the socket of PHP is connected to the server template, the socket server finds that some cached data needs to be accessed by external interfaces while organizing the new framework. What is more convenient is the php interface, PHP

Tags: web ack ipv6 address Port pen Linux description type. com"Everything is socket!. ”Although the words are slightly exaggerated, but the fact is, the current network programming is almost all using the socket.--Thoughts on practical programming and open source project research.We know the value of the exchange of information, how the process of communication between the network, such as when we open the

Package helper. socket {import config. configvar; import flash. errors. ioerror; import flash. events. event; import flash. events. eventdispatcher; import flash. events. ioerrorevent; import flash. events. progressevent; import flash. events. securityerrorevent; import flash.net. socket; import helper. hh_fun; public class phpsocket extends eventdispatcher {private var msocket:

UDP-based socketsNon-connected unreliable data transmission, can be no server side, but no server side, the data sent will be directly discarded, and can not reach the server side1 #客户端2 Import Socket3 ip_port= (' 127.0.0.1 ', 8080) 4 bufsize=10245 sock_client=socket.socket (socket.af_inet,socket. SOCK_DGRAM) #SOCK_DGRAM就是UDP6 while True:7 msg=input (' >> '). Strip () 8 if not msg:continue9 Sock_client.sendto (Msg.encode (' Utf-8 '), Ip

First, the network program based on TCP protocol The following figure is a general process for client/server programs based on TCP protocol: After the server calls the socket (), bind (), listen () completes initialization, calls the accept () blocking wait, is in the listening port state, the client calls the socket () initialization, calls connect () sends the SYN segment and blocks waiting for the se

First, the socket to write the server steps:1. The first step is to create the socket object. Call the socket constructor. Such as: 1 socket = socket.socket (family, type) The family parameter represents the address family, which can be either af_inet or Af_unix. The Af_inet family includes Internet addre

13 of the BIO series of openssl --- Socket Type BIO, openssl13 --- socket Socket Type BIO --- Based on openssl doc \ crypto \ bio_s_socket.pod translation and your own understanding, write (Author: DragonKing Mailwzhah@263.net released in: httpgdwzh.126.com openssl proprietary) Industry Forum) The Socket Type BIO is al

If a problem occurs, log If an error occurs when you call the connect socket accept function, perror ("socket"); perror ("Connect"); printf ("% s \ n", strerror (errno )); can make specific errors The select function emphasizes again: Socket operation on Non-socket errors may occur in two situations: 1. Create a

Socket asynchronous communication learning 3. socket Asynchronous Communication Next, the client uses the synchronous receiving mode. In the SocketClient project, a new SynServer class is created to store the socket server code. Similar to AsynServer, there are four main methods: There is a global socket, which is used

Socket programming practices in Linux (5) solutions for setting socket I/O timeout (1) Use the alarm function to set timeout #include unsigned int alarm(unsigned int seconds); Its main function is to set a signal transmission alarm. The signal SIGALRM is sent to the current process after the specified number of seconds in seconds. If the alarm function is called again within the scheduled uncomp

Several days ago, ASP. NET _ multithreading _ Socket I. ASP. NET B/S is a website (dynamic) and Management System (OA, invoicing, etc) C/S -- form software Why do I rarely use C/S for invoicing and other software? B/S deployment convenience C/S Installation Dynamic: interaction with the Server (IIS (software) If we use C # To write a website browser, we do not know C #, so our C # language is executed by IIS. Ii. Delegation Is the method po