linux socket programming by example pdf

Linux Network Programming-original socket programming and linux Network Programming The original socket programming is similar to the previo

, but you also need to call the socket () to create a socket file descriptor, and the address family specified as Af_unix,type can be selected Sock_ The Dgram or Sock_stream,protocol parameter is still specified as 0. UNIX domain socket and network socket programming the mo

protocol family, but the two macro definitions are the same, so it doesn't matter which one is used. Winsock2.h in # define AF_INET 2, #define Pf_inet af_inet, so af_inet in Windows is exactly the same as pf_inet. In the Unix/linux system, there is a slight difference between the two in different versions. For BSD, it is AF, for POSIX is PF. UNIX Systems support Af_inet,af_unix,af_ns and so on, while Dos,windows only supports Af_inet, which is the In

and 16bit short integers) are transmitted on two hosts that use a different byte sequence, the receiving end must be incorrectly interpreted. The solution is to make a unified format, are used to send and receive a big-endian byte order, so the big-endian byte sequence is called the network byte order. It should be noted that even though two processes on the same host (one written in C and one in Java), it is also necessary to consider the byte-order problem (the Java Virtual machine uses a big

Windows Socket API Programming Examples Has 408 reading 2010-05-19 13:50 fromFind a simple demo on the Internet:First look at the server-side program:#include #include using namespace Std;#define Port_server 6666//Custom Port 6666#define Num_clients 10#pragma comment (lib, "Ws2_32.lib")int main (int argc, char* argv[]){cout Wsadata Wsadata;WORD sockversion = Makeword (2, 0);if (0!= WSAStartup (sockversion

for the TCP three-way handshake process to be completed.2. Queue with Connection completed As shown in: 4. Accept Function Include header file Function: returns the first connection from the completed connection queue. If the completed connection queue is empty, the connection is blocked.Prototype: int accept (INT sockfd, struct sockaddr * ADDR, socklen_t * addrlen );ParametersSockfd: server socketADDR: the socket address of the peer is returned.Ad

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 numbe

order to require concurrent processing, the server needs to fork () a new process or thread to process the request.7. Moving HandsLeave a question, welcome everybody replies reply!!! Are you familiar with network programming under Linux? If familiar, write the following program to complete the following functions:Server-side:Receive client information for address 192.168.100.2, such as "Client Query", to p

/*************************************** **********************************> File name: addr_in.c> Author: Simba> Mail: dameng34@163.com> Created time: Fri 01 Mar 2013 04:16:08 pm CST**************************************** ********************************/# Include # Include Int main (void){Unsigned int ADDR = inet_addr ("192.168.0.100"); // The converted bytes are in the network byte sequence (large end)Printf ("add = % u \ n", ntohl (ADDR ));Struct in_addr ipaddr;Ipaddr. s_

(1024) - Print(data) - + #4. Close -Phone.close ()Client 21 ImportSocket2 3 #1. Buy Mobile phone4Phone =Socket.socket (socket.af_inet, socket. SOCK_STREAM)5 #print (phone)6 7 #2. Dialing8Phone.connect (('127.0.0.1', 8080))9 Ten #3. Send and receive Messages One whileTrue: Amsg = input ('>>:'). Strip () - if notmsg: - Continue thePhone.send (Msg.encode ('Utf-8')) -data = PHONE.RECV (1024) - Print(data) - + #4. Close -Phone.clos

usage error, you can use the following code to prevent this situation1 phone.setsockopt (socket. Sol_socket, SOCKET. SO_REUSEADDR, 1)Four, when the client input is empty (that is, direct carriage return), press ENTER, the client has been across there,Cause Analysis:The client sends the empty information needs to call the operating system interface, the client program in memory to send the information to co

client and the result is:1C:\Users\xu516\PycharmProjects\Python Full Stack development \venv\scripts\python.exe"C:/users/xu516/pycharmprojects/python Full Stack development/third module/network programming/04 Analog SSH Remote execution command/client. PY"2>>:d ir3 the volume in drive C is the OS4The serial number of the volume is 7849-BAF95 6C:\Users\xu516\PycharmProjects\Python full stack development \ Third module \ Network

uniquely identify the application (process) in the host ). In this way, the process of the network can be identified by using the triplet (IP address, protocol, port), and the process Communication in the network can be used to interact with other processes. Applications that use the TCP/IP protocol usually use the Application Programming Interface: socket of unix bsd and TLI of UNIX System V (which has be

request, will receive the request and receive the message from the client; The client connects to the server side and sends a message. Server-side code: #include Client code: #include Of course, the above code is very simple, there are many shortcomings, this is just a simple demonstration of the basic function of the socket use. In fact, no matter how complex a network program, these basic functions are used. The above server u

Java provides two classes for the TCP protocol, which are used in client programming and server-side programming, respectively. Before the application begins to communicate, you need to create a connection that is initiated by the client program, and the server-side program needs to listen to the host's specific port number and wait for the client to connect. In the client we only need to use the

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

To implement a long connection between the client and the server, you can connect the server to the client by using the socket. In this article, you will implement the server side and client of the socket in a native way, and then implement it again with the Mina framework. Native: The client can be implemented as follows: Socketclient: Package socketclient; Import Java.io.BufferedReader; Import java.io

Source: This article originates from: http://sinbad.zhoubin.com Author: Unknown (2002-12-12-06:02:00) Simple and easy to find, and learn it as a socket programming example. /**/ /*=============================================================================TCP Shell Version 1.00The Shadow Penguin Security (http://shadowpenguin.backsection.net)Written by Unyun (Un

protocol familyThe parameter type specifies the socket type, which can be the following values:Sock_stream // stream socket, connection-oriented and reliable communication typeSock_dgram // datagram socket, non-connection-oriented and unreliable communication typeSock_raw // The original socket, which is only valid fo

for the Internet protocol and can be used to directly access the IP protocolThe parameter protocol is usually set to 0, indicating that the default protocol is used. For example, the streaming socket in the Internet protocol family uses the TCP protocol, while the datagram socket uses the UDP protocol. When the socket