socket programming in c

different protocols will have different service nature. When you create a socket connection, you can specify the transport layer protocol used, which can support different transport layer protocols (TCP or UDP), which is a TCP connection when a connection is made using the TCP protocol. Soket and TCP/IP are not necessarily linked. The socket programming interface is designed to adapt to other network protocols as well. Therefore, the socket is only m

int Nnettimeout= +;//1 seconds //Delivery time limitsetsockopt (Socket,sol_s0cket,so_sndtimeo, (Char *)Nnettimeout,sizeof(int));//Receiving time limitsetsockopt (Socket,sol_s0cket,so_rcvtimeo, (Char *)Nnettimeout,sizeof(int));1.closesocket (typically does not close immediately and undergoes the time_wait process) to continue to reuse the socket:BOOL breuseaddr=true;SetSockOpt (S,sol_socket, SO_REUSEADDR, (const char*) breuseaddr,sizeof (BOOL));2. If you want a

,)) while TRUE:INP = input (' >>> ') client_socket.se Ndall (Bytes (INP, encoding= ' Utf-8 ')) data = str (CLIENT_SOCKET.RECV (1024x768), encoding= ' Utf-8 ') print (data) client_socket. Close ()Here the socket server is compared to the native socket, and he supports that when a request is no longer sending data, it will not wait but can process other requested data. However, if each request takes longer to take, the server side of the Select version cannot complete the simultaneous operation. a

This describes the blocking mode of the socket below:First, the socket has several functionsSocket () Create socketBind () binds the socket to an addressListen () Turn on Soket MonitorAccept () accepts others to connect me, this is a blocking function, the general server call.Recv () accept the message from the other side, this is also blocking function, because TCP to wait for the other party to complete the message after the execution of the message

Socketserver ModuleThe Socketserver internally uses IO multiplexing and "multithreading" and "multi-process" to enable the socket service side to process multiple client requests concurrently. That is, when each client requests a connection to the server, the socket server is creating a "thread" or "process" dedicated to all requests from the current client. threadingtcpserver The Soket server implemented by Threadingtcpserver creates a " thread "

modules, You can process images, sounds, videos, and animations to add brilliant brilliance to your programs. You can use Python to generate dynamic charts and statistical analysis charts. In addition, there is OpenGL. With the PyOpenGl module, you can quickly compile 3D scenes. Scientific Computing Python can play a unique role in a wide range of scientific computing fields. There are many modules that can help you efficiently complete your work in computing giant arrays, vector analysis, neur

*) (AfxGetApp ()->m_pmainwnd))->m_listwords.getcount ()-1);}The next step is to create a click function on the dialog box Connection button, which reads as follows:voidCchat_clientdlg::onbutton1 () {//Todo:add your control notification handler code here if(!M_STARTC) {BYTE nfild[4]; CString SIP; UpdateData (); M_serverip.getaddress (nfild[0],nfild[1],nfild[2],nfild[3]); Sip.format ("%d.%d.%d.%d", nfild[0],nfild[1],nfild[2],nfild[3]); M_cclientsocket.create ();//Create socketM_cc

risk of some failures. Because Gunicorn contains a Python hook pointing to the application, it is entirely possible to write a short piece of code to notify the restart process when the worker process is ready. Gunicorn does not contain the required hooks, but it is easy to make changes. It requires some modifications before the new version is released. Now, restarting processes has taken advantage of the fact that a single soket has multiple process

Using the underlying sockets to decode the underlying traffic is the focus of this effort.First to capture the first package1 #Coding:utf-8import Socket2 3 #host IP for listening4Host ="192.168.1.100"5 6Socket_protocol =socket. IPPROTO_ICMP7 8Sniffer =Socket.socket (socket.af_inet, socket. Sock_raw, Socket_protocol)9 Sniffer.bind (host, 0)TenSniffer.setsockopt (socket. IPPROTO_IP, Socket. IP_HDRINCL, 1) One ARaw_buffer = Sniffer.recvfrom (65535) - PrintRaw_bufferThe following line explains the

Recently it was the season of the Jumping nest, with four years of working experience. NET Little Ape joined the ranks of the army. Interviewed 4 companies in 3 days, by the way, the details and experience.If the interview is an exam, then you must try to be ready before the exam. Although 4 years of work experience, but actually can take the shot of the project also on 5, is really little poor, after all, is also two companies, the project is less, the company also has the money to keep, during

as client connections waiting up to 5s) Sk.getpeername () to return the remote address of the connection socket. The return value is typically a tuple (ipaddr,port). Sk.getsockname () returns the socket's own address. Typically a tuple (ipaddr,port) Sk.fileno () a file descriptor for a socketSecond, Socket serverThe Socketserver internally uses IO multiplexing and "multithreading" and "multi-process" to enable the socket service side to process multiple client requests concurrently. That is, wh

(SOCKADDR) FD_SET (sock, rfd); Connect and add the socket to the descriptor rfb, in this way, you can test the socket. One descriptor can be added to multiple sockets and then run the select function to query ret = select (0, 0, rfd, 0, timeout); if (ret SOCKADDR_IN addrSelf; // local address addrSelf. sin_addr.s_addr = inet_addr ("192.168.1.110"); // specify the network adapter address addrSelf. sin_family = AF_INET;AddrSelf. sin_port = htons (20000); // if (-1 = bind (sockClient [I], (SOCK

the Server Client the initial serial number of the data to be sent in the (to be established) connection. Generally, SYN nodes do not carry data. They only contain one IP header, one TCP header, and some possible TCP options. (3) The server must confirm the customer's SYN and send a SYN Shard, which contains the initial serial number of the data that the server will send in the same connection. The server sends SYN and ACK to the customer SYN in a single shard (indicating confirmation ). (4)

Android-Socket causes the Socket to close and cannot send and receive data after the IO stream is closed. androidio Use Socket to send data as an example: When sending data, declare: DataOutputStream OS = new DataOutputStream (socket. getOutputStream ()); Recently, I encountered the question: I want to send images to the server. If OS. close () is used, the server will receive the images, but the socket of my client will be affected and closed. If you do not need OS. close (), the server will ha

Using Select Listener Terminal Operation instance to process multiple socket client requests concurrently with select: The server uses Select to implement pseudo processing of multiple socket client requests simultaneously: clientHere the socket server is compared to the native socket, and he supports that when a request is no longer sending data, it will not wait but can process other requested data. However, if each request takes longer to take, the server side of the Select version cannot com

Normal 0 7.8 pt 0 2 false false false MicrosoftInternetExplorer4 Analysis: setsockopt () 1. If you want to reuse closesocket after a socket in the established State (usually distinguished by the port number and the flag) calls closesocket (usually the socket will not be closed immediately but will go through the time_wait process:Bool breuseaddr = true;Setsockopt (S, sol_socket, so_reuseaddr, (constChar *) breuseaddr, sizeof (bool ));

4.1 relationship between SOCKET and TCP/IP Socket is an application interface, and TCP/IP is a network transmission protocol. Although the interfaces are the same, different protocols have different service properties. When creating a Socket connection, you can specify the transport layer protocol used. The Socket can support different transport layer protocols (TCP or UDP). When using the TCP protocol for connection, the Socket connection is a TCP connection.

connection, and ends the interaction at once.Vi. TCP-based sockets1 #Service Side2 3 ImportSocket4 5Phone = Socket.scoket (socket.af_inet,soket. SOCK_STREAM)#instantiate a Socket object6Phone.bind (('192.168.20.49', 8080))#binding IP Address and port number7Phone.lisen (5)#start TCP Listening with a maximum number of connections set to 5,8 9Con,c_address = Phone.accept ()#wait until the link arrives, once has the link, then returns a meta-ancestor, G

Today, when I look at the my_server example of Linux C programming, I hit this code and ask questions about the close call to its parent-child process closing the socket.The three close sockets in the callout, think of the communication end of the child process shut down their own communication socket:conn_fd can understand, but will sock_fd, the server's listening socket is also closed do not know how to go on. And the parent Process execution Close (CONN_FD) closes the communication socket for

In the Java and C # communication due to two kinds of non-soket language int type, such as when doing a packet header to confirm that the data length requires a fixed number of bytes stored in an int type of data sent will not read the same data.convert int to byte[in Java]1 /**2 * Dump Data of the Int32 type into a byte array of 4 bytes3 * @parami:int32 Types of data4 * @returnreturns a byte array of 4 bytes in size5 */6 Public St