socket operation on non socket

The Socket API is a standard API for practical application development in Web applications. Although the API is simple. However, novice developers may experience some common problems. This article identifies some of the most common pitfalls and shows you how to avoid them.Hidden trouble 1. Ignore return statusThe first pitfall is obvious, but it's a mistake for the easiest developer to make.Suppose you ignore the return state of a function, and when t

variables $ host = "192.168.1.99"; $ port = 1234; // set the timeout value set_time_limit (0 ); // create a Socket $ socket = socket_create (AF_INET, SOCK_STREAM, 0) or die ("cocould not createsocket \ n "); // bind the Socket to the port $ result = socket_bind ($ socket, $

. Next we just run the client program to connect. On the Code The client is already connected to the service side. Case two: Code explanation Set some basic variables $host = "192.168.1.99"; $port = 1234;//Set timeout time set_time_limit (0);//Create a socket$socket = Socket_create (af_inet , Sock_stream, 0) or die ("Could not createsocket\n");//bind

PHP Socket programming process details Introduction Socket is used for inter-process communication. Inter-process communication is generally based on the client-server model. In this case, the client-server is an application that can interact with each other. The interaction between the client and the server needs to be connected. Socket programming is responsib

: = 5) {break ;};} socket_close ($ msgsock) ;}while (true); socket_close ($ sock);?> // Client ";}While ($ out = socket_read ($ socket, 8192) {echo" received the server's return message! \ N "; echo" accept the following content: ", $ out;} echo" close SOCKET... \ n "; socket_close ($

a read, write, or specified socketSocket_strerror () returns a detailed error for the specified error numberSocket_write () write data to the socket cacheSocket_writev () write data to a scatter/aggregate arrayCase ONE: Socket communication DemoServer-side: 1 This is the server-side code for the socket. Then run CMD, note that it is your own program to store the

socket to release the connection, see:Figure 2, TCP four-time handshake sent in socketThe process is as follows: An application process first calls close to actively close the connection, when TCP sends a FIN M; After the other end receives fin m, perform a passive shutdown to confirm the fin. Its reception is also passed as a file terminator to the application process, because the receive of fin means that the application process can no

); Create a socket $socket = socket_create (af_inet, sock_stream, 0) or die ("could not createsocket\n"); Bind socket to port $result = Socket_bind ($socket, $host, $port) or die ("could not bind tosocket\n"); Start listening for

operation is complete. In asynchronous mode, these calls return immediately. In addition, in many cases, socket programming is implemented on the client and server based on different situations, and the application program is compiled on the client to send requests to the specified port on the server, at the same time, the preparation of the server application to process the request has been mentioned in the above description; of course, not all

); # compressing IP addresses$ Address = sockaddr_in ($ port, $ packhost); # press it into the sockaddr_in formatSocket (client, af_inet, sock_stream, 6); # The socket is client and the TCP protocol is used.Connect (client, $ address); # connectClient-> autoflush (1); # enable autoflush Mode$ Msg_in = # InputPrint "in: $ msg_in/N"; # outputClose client; # Close socketExit 1; # exit the program==============

C #. Net synchronous asynchronous socket communication and multithreading Summary Source: http://www.cnblogs.com/Silverlight_Team/archive/2009/03/13/1411136.html Synchronous socket communication Point-to-point online communication supported by socket The server monitors connections, and the client sends connection requests. After a connection is establishe

; 32-bit IPv4 address, network Byte ordered char sin_zero[8]; UnusedSOCKADDR_IN is a network socket address structure, the size of 16 bytes, defined in the struct SOCKADDR { sa_family_t sa_family; Address family:af_xxx value char sa_data[14]; Protocol-specific Address}SOCKADDR is through the socket address structure, when passed as a parameter

is complete. In asynchronous mode, these calls return immediately. In addition, in many cases, Socket programming is implemented on the client and server based on different situations, and the application program is compiled on the client to send requests to the specified port on the server, at the same time, the preparation of the server application to process the request has been mentioned in the above description; of course, not all

. Using the PHP socket extension Server-side code: When you write a server, you must first perform an "accept" operation on the server socket using the Stream_socket_accept feature. This function blocks until the client connects to the server, or the timeout expires.//Ensure that the client is connected without timing outSet_time_limit(0);//Set IP and port number$address="127.0.0.1"

. Message); The Bay of Bayi break; The "All-in-A-showmsg" (Stri ng msg) 94 Txtinfo.appendtext (msg+ "\ r \ n"), 98}100 101 102 103 Priva te void Btnsend_click (object sender, EventArgs e) 104 105 {106 107//client sends message to server 108 109 if (Client!=null) 111 {113 try114 115 {116 117 ShowMsg (Txtmsg.text); 118 119 byte[] buffer = Encoding.UTF8.GetBytes (txtmsg.text); 120 121 Client. Send (buffer); 122 123}

SOCKET */If (ser_sockfd {/* Creation failed */Fprintf (stderr, "socker Error: % s \ n", strerror (errno ));Exit (1 );}/* Initialize the server address */Addrlen = sizeof (struct sockaddr_in );Bzero ( ser_addr, addrlen );Ser_addr.sin_family = AF_INET;Ser_addr.sin_addr.s_addr = htonl (INADDR_ANY );Ser_addr.sin_port = htons (SERVER_PORT );If (Bind(Ser_sockfd, (struct sockaddr *) ser_addr, sizeof (struct sock

. error, e:Print "socket creation error: % s" % e Try:S. connect (host, port ))Handle T socket. gaierror, e:Print "host or port error: % s" % eFailed T socket. error, e:Print "connection error: % s" % e Try:S. sendall (filename + "\ r \ n ")Failed T socket. error, e:Print "d

(SER_SOCKFD);} Client Workflow: First call the socket function to create a socket and then call the BIND function to bind it to the native address and a local port number, request a connection to the server, and send the string "Hi,i am client!" to the client via a new socket. Finally, close the socket.

);Create a socket$socket = Socket_create (af_inet, sock_stream, 0) or die ("Could not createsocket\n");Bind socket to Port$result = Socket_bind ($socket, $host, $port) or Die ("Could not bind tosocket\n");Start listening links$res

client's connect returns in the second time of the three handshake, while the server-side accept is returned for the third time in the three-time handshake.5, TCP four waveThe four-time handshake in the socket releases the connection process, see:An application process first calls close to actively close the connection, when TCP sends a fin m, and the other end receives Fin m, performs a passive shutdown to confirm the fin. Its reception is also pass