C++基於TCP/IP簡單的客戶端、伺服器通訊程式例項
阿新 • • 發佈:2019-02-09
本篇文章實現了一個基於TCP 的一個非常簡單的客戶/伺服器通訊程式例項。該程式中通訊協議使用的是面向連線的TCP協議SOCK_STREAM, 伺服器的ip地址為本地地址即:
127.0.0.1,埠號為自定義的5099(大於1024即可),服務端的功能只要有客戶端連線請求,服務端就接受連線,在連線成功後向客戶端傳送資料,並且接受客戶端傳送的
資料。客戶端在向服務端發出請求後接受並顯示服務端的資料,並且給服務端也傳送資料。
以下程式碼是服務端程式程式碼:
[cpp] view plain copy
#include <WinSock2.h>
#include <stdio.h>
#include <stdlib.h>
#pragma comment(lib, "ws2_32.lib")
void main()
{
WSADATA wsaData;
int port = 5099;
char buf[] = "Server: hello, I am a server.....";
if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
printf("Failed to load Winsock");
return ;
}
//建立用於監聽的套接字
SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(port); //1024以上的埠號
addrSrv.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
int retVal = bind(sockSrv, (LPSOCKADDR)&addrSrv, sizeof (SOCKADDR_IN));
if(retVal == SOCKET_ERROR){
printf("Failed bind:%d\n", WSAGetLastError());
return;
}
if(listen(sockSrv,10) ==SOCKET_ERROR){
printf("Listen failed:%d", WSAGetLastError());
return;
}
SOCKADDR_IN addrClient;
int len = sizeof(SOCKADDR);
while(1)
{
//等待客戶請求到來
SOCKET sockConn = accept(sockSrv, (SOCKADDR *) &addrClient, &len);
if(sockConn == SOCKET_ERROR){
printf("Accept failed:%d", WSAGetLastError());
break;
}
printf("Accept client IP:[%s]\n", inet_ntoa(addrClient.sin_addr));
//傳送資料
int iSend = send(sockConn, buf, sizeof(buf) , 0);
if(iSend == SOCKET_ERROR){
printf("send failed");
break;
}
char recvBuf[100];
memset(recvBuf, 0, sizeof(recvBuf));
// //接收資料
recv(sockConn, recvBuf, sizeof(recvBuf), 0);
printf("%s\n", recvBuf);
closesocket(sockConn);
}
closesocket(sockSrv);
WSACleanup();
system("pause");
}
客戶端
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
void main()
{
//載入套接字
WSADATA wsaData;
char buff[1024];
memset(buff, 0, sizeof(buff));
if(WSAStartup(MAKEWORD(2, 2), &wsaData) != 0)
{
printf("Failed to load Winsock");
return;
}
SOCKADDR_IN addrSrv;
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(5099);
addrSrv.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
//建立套接字
SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
if(SOCKET_ERROR == sockClient){
printf("Socket() error:%d", WSAGetLastError());
return;
}
//向伺服器發出連線請求
if(connect(sockClient, (struct sockaddr*)&addrSrv, sizeof(addrSrv)) == INVALID_SOCKET){
printf("Connect failed:%d", WSAGetLastError());
return;
}else
{
//接收資料
recv(sockClient, buff, sizeof(buff), 0);
printf("%s\n", buff);
}
//傳送資料
char buff = "hello, this is a Client....";
send(sockClient, buff, sizeof(buff), 0);
//關閉套接字
closesocket(sockClient);
WSACleanup();
}