C + + Windows sockets for the simplest C/S network communication (TCP)

1. Server-side code:

#include <iostream> #include <WinSock2.h> #pragma comment (lib, "Ws2_32.lib") #define Connect_num_max 10using namespace Std;int Main () {//Load socket font wsadata wsadata;int iRet = 0;iret = WSAStartup (Makeword (2, 2), &wsadata); if ( IRet! = 0) {cout << "WSAStartup (Makeword (2, 2), &wsadata) Execute failed!" << Endl; return-1;} if (2! = Lobyte (wsadata.wversion) | | 2! = hibyte (wsadata.wversion)) {wsacleanup (); cout << "wsadata version is not cor rect! "<< endl;return-1;} Create socket Socket ServerSocket = socket (af_inet, sock_stream, 0); if (ServerSocket = = invalid_socket) {cout << " ServerSocket = socket (af_inet, SOCK_STREAM, 0) Execute failed! "<< endl;return-1;} Initializes the server address family variable sockaddr_in addrsrv;addrsrv.sin_addr. S_un. S_ADDR = htonl (inaddr_any); addrsrv.sin_family = Af_inet;addrsrv.sin_port = htons (6000);//Bind iret = Bind (ServerSocket, ( sockaddr*) &addrsrv, sizeof (SOCKADDR)); if (IRet = = socket_error) {cout << bind (ServerSocket, (sockaddr*) &addrsrv, SizeoF (sockaddr)) Execute failed! "<< endl;return-1;} Monitor IRet = Listen (ServerSocket, Connect_num_max), if (IRet = = socket_error) {cout << "Listen (ServerSocket, 10) Execute failed! "<< endl;return-1;} Wait for connection _ receive _ send sockaddr_in clientaddr;int len = sizeof (SOCKADDR), while (1) {SOCKET Connsocket = Accept (ServerSocket, ( sockaddr*) &clientaddr, &len), if (Connsocket = = invalid_socket) {cout << "accept (ServerSocket, sockaddr* ) &clientaddr, &len) Execute failed! "<< endl;return-1;} Char sendbuf[100];sprintf_s (SENDBUF, "Welcome%s", Inet_ntoa (CLIENTADDR.SIN_ADDR)); Send (Connsocket, SendBuf, strlen ( SENDBUF) +1, 0); Char recvbuf[100];recv (connsocket, recvbuf, 0);p rintf ("%s\n", Recvbuf); closesocket (Connsocket);} System ("pause"); return 0;}

2. Client code:

#include <iostream> #include <winsock2.h>using namespace std; #pragma comment (lib, "Ws2_32.lib") int main () { Load socket font wsadata wsadata;int iRet =0;iret = WSAStartup (Makeword (2, 2), &wsadata); if (IRet! = 0) {cout << Wsastart Up (Makeword (2, 2), &wsadata) Execute failed! "<< endl;return-1;} if (2! = Lobyte (wsadata.wversion) | | 2! = hibyte (wsadata.wversion)) {wsacleanup (); cout << "wsadata version is not cor rect! "<< endl;return-1;} Create socket Socket Clientsocket = socket (af_inet, sock_stream, 0); if (Clientsocket = = invalid_socket) {cout << " Clientsocket = socket (af_inet, SOCK_STREAM, 0) Execute failed! "<< endl;return-1;} Initializes the server-side address family variable sockaddr_in srvaddr;srvaddr.sin_addr. S_un. S_ADDR = inet_addr ("127.0.0.1"); srvaddr.sin_family = Af_inet;srvaddr.sin_port = htons (6000);//Connect Server Iret = Connect ( Clientsocket, (sockaddr*) &srvaddr, sizeof (SOCKADDR)); if (0! = IRet) {cout << connect (clientsocket, sockaddr *) &srvaddr, sizeof (SOCKADDR)) Execute FAiled! "<< endl;return-1;} Receive Message char recvbuf[100];recv (clientsocket, recvbuf, 0);p rintf ("%s\n", recvbuf);//Send Message char sendbuf[100];sprintf_ S (sendbuf, "Hello, this is client%s", "Rabbit"); Send (Clientsocket, SendBuf, strlen (sendbuf) +1, 0);//Cleanup closesocket ( Clientsocket); WSACleanup (); System ("pause"); return 0;}

3. Program Operation:

C + + Windows sockets for the simplest C/S network communication (TCP)