本篇文章实现了一个基于TCP 的一个非常简单的客户/服务器通信程序实例。该程序中通讯协议使用的是面向连接的TCP协议SOCK_STREAM, 服务器的ip地址为本地地址即:
127.0.0.1,端口号为自定义的5099(大于1024即可),服务端的功能只要有客户端连接请求,服务端就接受连接,在连接成功后向客户端发送数据,并且接受客户端发送的
数据。客户端在向服务端发出请求后接受并显示服务端的数据,并且给服务端也发送数据。
以下代码是服务端程序代码:
#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;
}
//创建用于监听的套接字
SOCKET sockSrv = socket(AF_INET, SOCK_STREAM, 0);
SOCKADDR_IN addrSrv;
addrSrv.sin_family = AF_INET;
addrSrv.sin_port = htons(port); //1024以上的端口号
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)
{
//等待客户请求到来
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));
//发送数据
int iSend = send(sockConn, buf, sizeof(buf) , 0);
if(iSend == SOCKET_ERROR){
printf("send failed");
break;
}
char recvBuf[100];
memset(recvBuf, 0, sizeof(recvBuf));
// //接收数据
recv(sockConn, recvBuf, sizeof(recvBuf), 0);
printf("%s\n", recvBuf);
closesocket(sockConn);
}
closesocket(sockSrv);
WSACleanup();
system("pause");
}
接下来是客户端代码:
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib, "ws2_32.lib")
void main()
{
//加载套接字
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");
//创建套接字
SOCKET sockClient = socket(AF_INET, SOCK_STREAM, 0);
if(SOCKET_ERROR == sockClient){
printf("Socket() error:%d", WSAGetLastError());
return;
}
//向服务器发出连接请求
if(connect(sockClient, (struct sockaddr*)&addrSrv, sizeof(addrSrv)) == INVALID_SOCKET){
printf("Connect failed:%d", WSAGetLastError());
return;
}else
{
//接收数据
recv(sockClient, buff, sizeof(buff), 0);
printf("%s\n", buff);
}
//发送数据
char buff = "hello, this is a Client....";
send(sockClient, buff, sizeof(buff), 0);
//关闭套接字
closesocket(sockClient);
WSACleanup();
}
运行结果:
---------------------
作者:HelloWord杰少
来源:CSDN
原文:/shenjie12345678/article/details/28321969
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