pga socket

Introduction1, the agreement is equivalent to the mutual communication between the program reached a convention, it provides the structure of packet packets, the mode of exchange, the meaning of inclusion and how the message contained in the analysis.2, the TCP/IP protocol family has the IP protocol, the TCP protocol and the UDP protocol.3. The address used by the TCP protocol and the UDP protocol is called the port number and is used to differentiate between different applications on the same h

1. TCP-based Network Program It is the general process of a TCP-based client/server program: After the server calls socket (), BIND (), and listen () to complete initialization, it calls accept () to block and wait, and is in the listening port State. After the client calls socket () to initialize, call connect () to issue SYN segments and block wait for the server to respond, the server responds to a SYN-

The previous article on the socket is a simple encapsulation, but because send and recv are synchronous, the real use of the time generally need to asynchronous, if the application layer itself is responsible for maintaining the asynchronous thread, the framework is not practical, so asynchronous transceiver or to have.Do not know how to say, first occupy the hole after the slowly say it.My approach to implementation:1, create Sendbuffer and Recvbuffe

Recently, there is a project is very hot, that is the live answer, received the company's task, the development of live chat room function. People online chat with each other. Previously done similar, was used by Ajax polling, this is a very expensive server. So this time began to use the socket to do, I am mainly responsible for back-end development, mainly with the front-end to do some interface.Small program front-end use of space wx.connectsocket

One, what is the socket The socket can be viewed as a programming interface between the user process and the kernel network protocol stack. Sockets can be used not only for interprocess communication between native computers, but also for interprocess communication between different hosts on a network. The socket API is an abstract network programming interf

second type of approach is to use the port multiplexing, do the port binding before using Listensocket.setsocketoption (Socketoptionlevel.socket, socketoptionname.reuseaddress, 1); Set the bound port to reusable, shielding the exception directly. I am lazy, directly using the port multiplexing, the code is less AH. Although the technology is not very understanding, but there should be some of the resources are not released, if the frequent use of the server will affect the performance of "Port

from the Wild Animal bloghttp://www.cnblogs.com/wzd24/Two examples of synchronous socket implementations for. NET socket development today, let's talk about the application of synchronous sockets in the development of. NET network applications, many people think that the service socket of the network application should not use synchronous

socket interpretation, HTTP and socket long connection and short connection difference. TCP/IP TCP/IP is a protocol group that can be divided into three levels: Network layer, Transport layer and application layer. At the network layer are IP protocols, ICMP protocols, ARP protocols, RARP protocols, and BOOTP protocols. There are TCP protocols and UDP protocols in the transport layer. ； In the applicat

In general, the socket can be divided into TCP sockets and UDP sockets, further, can also be divided into server-side sockets and client sockets. In this section we first focus on the TCP socket server-side Socket,java in the ServerSocket class corresponding to it, this class is mainly used to create a socket service o

Server: # Define recv_posted 0# Define send_posted 1 Char buffer [1024]; Typedef struct _ per_handle_data{Socket socket; // This structure is used to send a socket to the port} Per_handle_data, * lper_handle_data; Typedef struct _ per_io_data{Overlapped;Wsabuf wsabuffer;DWORD recvbyte, sendbyte;Int operationtype; } Per_io_data, * lper_io_data; //*************