C + + simple TCP implementation [socket] client and client communication __c++

Development Environment Vs 2008 Create a new Win32 console project

Server-side code

Server.cpp:Defines the entry point for the console application. #include "stdafx.h" #include "winsock2.h" #pragma comment (lib, "Ws2_32.lib") #include <iostream> using namespace Std int _tmain (int argc, char* argv[]) {const int buf_size = 64; Wsadata WSD; Wsadata variable SOCKET sserver; Server socket socket sclient; Client socket sockaddr_in Addrserv;; Server address char buf[buf_size]; Receive data buffer char sendbuf[buf_size];//returns the data int retVal to the client; return value//Initialize socket dynamic Library if (WSAStartup (Makeword (2,2), &AMP;WSD)!= 0) {cout << "WSAStartup failed!" << Endl; 1; ///Create Socket sserver = socket (af_inet, sock_stream, ipproto_tcp); if (Invalid_socket = = sserver) {cout << "SOCKET failed!" << Endl; WSACleanup ();//free socket resource; return-1; }//server socket address addrserv.sin_family = af_inet; Addrserv.sin_port = htons (4999); ADDRSERV.SIN_ADDR.S_ADDR = Inaddr_any; Binding Sockets RetVal = Bind (Sserver, (lpsockaddr) &addrserv, sizeof (sockaddr_in)); if (Socket_error = = retVal) {cout << "bind failed!";< Endl; Closesocket (sserver); Close socket WSACleanup (); releasing socket resources; return-1; //start Listening RetVal = Listen (sserver, 1); if (Socket_error = = retVal) {cout << "Listen failed!" << Endl; closesocket (sserver);//Close Socket WSACleanup ();//Interpretation put socket resources; return-1; //Accept client request sockaddr_in addrclient; int addrclientlen = sizeof (addrclient); Sclient = Accept (Sserver, (sockaddr far*) &addrclient, &addrclientlen); if (Invalid_socket = = sclient) {cout << "accept failed!" << Endl; closesocket (sserver);//Close Socket WSACleanup (); releasing socket resources; return-1; } while (true) {//Receive client Data ZeroMemory (BUF, buf_size); retVal = recv (sclient, buf, buf_size, 0); if (socket_error = = RetVal) {cout << "recv failed!" << Endl; closesocket (sserver);//Close Socket closesocket (sclient);//Close Socket WSACleanup ();// releasing socket resources; return-1; } if (buf[0] = = ' 0 ') break; cout << "Client-sent data:" << buf <<endl; cout << "Send data to client:"; Cin >> SendBuf; Send (Sclient, SendBuf, strlen (SENDBUF), 0); }//FallbackOut closesocket (sserver); Close socket closesocket (sclient); Close socket WSACleanup (); releasing socket resources; return 0; } 

Client code

Client.cpp:Defines the entry point for the console application. #include "stdafx.h" #include "winsock2.h" #include <iostream> #pragma comment (lib, "Ws2_32.lib") using namespace Std BOOL Recvline (SOCKET s, char* buf); Reads a row of data int main (int argc, char* argv[]) {const int buf_size = 64; Wsadata WSD; Wsadata variable SOCKET shost; Server socket sockaddr_in servaddr; Server address char buf[buf_size]; Receive data buffer char bufrecv[buf_size]; int retVal; return value//Initialize socket dynamic Library if (WSAStartup (Makeword (2,2), &AMP;WSD)!= 0) {cout << "WSAStartup failed!" << Endl; -1; ///Create Socket Shost = socket (af_inet, sock_stream, ipproto_tcp); if (Invalid_socket = = shost) {cout << "SOCKET failed!" << Endl; WSACleanup ()//releasing socket resource return-1; //Set server address servaddr.sin_family =af_inet; SERVADDR.SIN_ADDR.S_ADDR = inet_addr ("127.0.0.1"); Servaddr.sin_port = htons ((short) 4999); int nservaddlen = sizeof (SERVADDR); Connection Server Retval=connect (Shost, (lpsockaddr) &servaddr, sizeof (SERVADDR)); if (socket_error = = RetVal {cout << "connect failed!" << Endl; closesocket (shost);//Close Socket WSACleanup ();//Release Socket resource return -1; {(true) {//Send data to Server ZeroMemory (buf, buf_size); cout << send data to server: "; Cin >> BUF; RetVal = Send (Shost, buf, strlen (BUF), 0); if (Socket_error = = retVal) {cout << "send failed!" << Endl; closesocket (shost);//Close Socket WSACleanup ();//Release socket Word resource return-1; }//recvline (Shost, BUFRECV); Recv (shost, bufrecv,5, 0); Receive server-side data, receive only 5 characters cout << Endl << "receive data from server:" << bufrecv; }//Exit closesocket (Shost); Close socket WSACleanup (); Release socket resource return 0; }