through socket

socket.setsockopt(level, optname, value)↑↑↑→[so_keepalive,↑so_linger,↑so_rcvbuf,↑so_sndbuf,↑so_rcvlowat, So_sndlowat,↑so_rcvtimeo, So_sndtimeo,↑SO_REUSEADDR]According to the difference of the level value of the parameter optionSocket options are divided into 3 major categories1. Universal socket Option: Sol_socket2.IP option: Ipproto_ip in order to get the parameters of the IP layer3.TCP option: ipproto_tcp in order to get the parameters of the TCP la

Today, qtcreator is installed in Ubuntu to test whether it can be used. As a result, a problem occurs during the test. After a simple compilation, F5 compilation appears in gnome-terminal. Cannot connect creator comm socket/tmp/qt_temp.u14973/stub-socket: no such file or directory So I checked that QT cannot be executed using gnome-terminal, and X-team is required. So I thought of the solution: Find tool

Reference 1 click the Open linkReference 2 Click the Open linkCodeClient.cpp: Defines the entry point of the console application. #include "stdafx.h" #include Using the C language socket to enable the Windows PC to communicate with the FTP server---socket implementation FTP client

Socket using the AF_INET protocol family, and create Sock_raw original set of words, their own IP header and TCP head, when familiar with the next head structure. * ===================================================================================== * * FILENAME:RAW.C * * Description: Send the TCP protocol using the original socket and take your own data. * * version:1.0 * created:2012 year Sep

Socket programming in LAN testing, socket programming LAN How can I test and use the Socket messaging and file software mentioned earlier? In fact, you only need to determine the local area network connection between the client and the server. 1. Enter ipconfig/all in cmd to obtain the IP address or local name. 2. Customer enters the ping IP address (or Serve

little state tracked at each end of the connection (source and destination ports and addresses, and local socket). The network stack uses this state to knowWhich process to give each incoming packet to and what State to put in the header of each outgoing packet. The so-called connection is only a virtual pipeline consisting of some States saved by each endpoint of the connection. Through these statuses, the network stack knows to pass the incoming da

Socket use Af_inet protocol family, and create sock_raw original socket, fill in the IP header and TCP header, it is familiar with the lower head structure. * ===================================================================================== * * FILENAME:RAW.C * * Description: Uses the original socket to send the TCP protocol and take out its own data.

Socket Communication in Python twisted framework Reprinted: http://blog.csdn.net/jackyyen/archive/2009/04/13/4069887.aspx Python Network toolkit twisted Matrix Twisted matrix is an increasingly popular pure Python framework for programming network services and applications. Although twisted matrix has a large number of loosely coupled modular components, the central concept of the framework is the idea of non-blocking asynchronous servers. In thi

Try { 2. What is the difference between socket and socketchannel? Waiting for answers

Use the alarm function to set a timeout void handler (int sig) { } signal (SIGALRM, handler); Alarm (5); int ret = read (FD, buf, sizeof (BUF)); if (ret = = 1 errno = = eintr) errno = etimeout; else if (ret >= 0) alarm (0); ................. Program general framework as shown above, if read in the 5s by the SIGALRM signal interruption and return, it indicates a timeout, otherwise no timeout has been read to the data, cancel the alarm clock. However, this method is not commonly u

Log4j2 test instance-socket centralized print example, log4j2-socket1. Background Because the company recently set up a centralized log management platform and required that all system logs be sent to the unified platform, based on this, we studied the socket of log4j2. 2. Prepare materials Two jar packages for log4j2: log4j-api-2.1.jar and log4j-core-2.1.jar. (The version must be consistent, especially the

How to Implement Socket heartbeat packets and socket heartbeat packets A client has been created recently, but a disconnection detection function is required. Let's take a look at using the custom HeartBeat method to check the client connection. How to Implement heartbeat packets: After the client is connected to the server, the server maintains an online client list. The client sends a heartbeat packet to

C ++ Windows Socket implements the simplest C/S network communication (TCP) and socket network communication 1. server code: # Include 2. client code: # Include 3. program running:

Novice help, socket unable to create socket

1: 2: ". /lib/unpsunyj.h "3: 4: Main (argc * *argv)5: {6: {7: s;8: Char C [sizeof(short)];9: un;Ten: One : un. = 0x0103;: std::un. std::Endl;: printf ("%s:"cpu_vendor_os);: (sizeof (short) = = 2): { :(un. Cun. C [1] = = 3): printf ("big-endian\n"); :(un. Cun. C [1] = = 1): printf ("little-endian\n");: Else: printf ("unknown\n"); : }At : Else: printf ("siz

DotNet. Net. MySocket isSLB. NET(Server Load Balance Server Load balancer) is a core component of the project. Therefore, we have been wondering whether multiple processes can provide one service, like the IIS Web garden, to work together with client requests. However, if you use the socket component of the. net framework, it seems that multi-process sharing cannot be achieved. So I had my own idea. Below is a demo program I wrote (download at th

DOTNET. net. mysocketYesSLB. net(Server load balance Server Load balancer) is a core component of the project. In actual projects, it is found that the single-process server has limited capacity to process highly concurrent customer requests. Therefore, we have been wondering whether multiple processes can provide one service, like the IIS web garden, to work together with client requests. However, if you use the socket component of the. NET Framewo

"); }catch (unknownhostexceptione) {e.printstacktrace (); }intport=8800;// Create a packet, send the specified length of information to the specified port on the specified server DatagramPacketdp=new Datagrampacket (Buf,buf.length,ia,port);// Create a Socket object datagramsocketds=null;try{ds= newdatagramsocket ();}catch (socketexceptione) { e.printstacktrace ();}// send packet try{ ds.send (DP);}catch (IOEXCEPTIONNBSP;E) {e.printstacktrace ();}// cr

Member name Description Dgram Supported by the. NET Framework Lite version. Supports datagram, that is, the maximum length of a fixed (usually very small) connectionless and unreliable message. Messages may be lost or duplicated and may not be arranged in order when they arrive.DgramA Socket type does not require any connection before sending or receiving data, and can communicate with multiple hosts.DgramUse the datagram protocol (Udp)

Socket Transmission ModeSocketsThere are two main operations: connection-oriented and connectionless. connection-oriented sockets operations are like a phone. They must establish a connection and a person call. the order of all things at arrival is the same as that at their departure. the connectionless sockets operation is like a mail delivery, with no guarantee. The order of arrival of multiple mails may be different from that of departure.Which mod