实现一个简单的server和client收发消息的程序,能互相收发,不过收到之后要先回才能继续收,同样发了之后要等待收到才能继续发
上代码:
server端:
#include <iostream>
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib") //静态加入一个lib文件
using namespace std;
int main()
{
WORD sockVersion = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(sockVersion, &wsaData) != 0) //WSAStartup返回0表示设置初始化成功
return 0;
/*创建套接字*/
//AF_INET表示IPv4,SOCK_STREAM数据传输方式,IPPROTO_TCP传输协议;
SOCKET listenSocket = socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
if (listenSocket == INVALID_SOCKET)
{
printf("套接字创建失败");
WSACleanup();
return 0;
}
/*绑定IP和端口*/
//配置监听地址和端口
sockaddr_in addrListen;
addrListen.sin_family = AF_INET; //指定IP格式
addrListen.sin_port = htons(8888); //绑定端口号
addrListen.sin_addr.S_un.S_addr = INADDR_ANY; //表示任何IP service.sin_addr.s_addr = inet_addr("127.0.0.1");
if (bind(listenSocket, (SOCKADDR*)&addrListen, sizeof(addrListen)) == SOCKET_ERROR) //(SOCKADDR*)
{
printf("绑定失败");
closesocket(listenSocket);
return 0;
}
/*开始监听*/
if (listen(listenSocket, 5) == SOCKET_ERROR)
{
printf("监听出错");
closesocket(listenSocket);
return 0;
}
/*等待连接,连接后建立一个新的套接字*/
SOCKET revSocket; //对应此时所建立连接的套接字的句柄
sockaddr_in remoteAddr; //接收连接到服务器上的地址信息
int remoteAddrLen = sizeof(remoteAddr);
printf("等待连接...\n");
/*等待客户端请求,服务器接收请求*/
revSocket = accept(listenSocket, (SOCKADDR*)&remoteAddr, &remoteAddrLen); //等待客户端接入,直到有客户端连接上来为止
if (revSocket == INVALID_SOCKET)
{
printf("客户端发出请求,服务器接收请求失败:\n", WSAGetLastError());
closesocket(listenSocket);
WSACleanup();
return 0;
}
else
{
printf("客服端与服务器建立连接成功:%s \n", inet_ntoa(remoteAddr.sin_addr));
}
char revData[255] = "";
char *sendData = new char[100];
/*通过建立的连接进行通信*/
int res = recv(revSocket, revData, 255, 0);
if (res > 0)
{
printf("Bytes received: %d\n", res);
printf("客户端发送的数据: %s\n", revData);
}
else if (res == 0)
printf("Connection closed\n");
else
printf("recv failed: %d\n", WSAGetLastError());
while (cin >> sendData)
{
//cout << strlen(sendData) << endl;
memset(revData, 0, sizeof(revData));
if (strcmp(sendData, "q") == 0)
{
printf("服务器停止发送数据!\n");
break;
}
//发送数据
send(revSocket, sendData, strlen(sendData), 0);
res = recv(revSocket, revData, 255, 0);
if (res > 0)
{
printf("Bytes received: %d\n", res);
printf("客户端发送的数据: %s\n", revData);
}
}
closesocket(listenSocket);
WSACleanup();
return 0;
}
client端:
#include <iostream>
#include <WinSock2.h>
#include <stdio.h>
#pragma comment(lib,"ws2_32.lib") //静态加入一个lib文件
using namespace std;
int main()
{
WORD sockVerson = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(sockVerson, &wsaData) != 0)
return 0;
//建立客户端socket
SOCKET clientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (clientSocket == INVALID_SOCKET)
{
printf("套接字创建失败");
WSACleanup();
return 0;
}
//定义要连接的服务器地址
sockaddr_in addrConServer;
addrConServer.sin_family = AF_INET;
addrConServer.sin_port = htons(8888);
addrConServer.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
if (connect(clientSocket, (SOCKADDR*)&addrConServer, sizeof(addrConServer)) == SOCKET_ERROR)
{
printf("客户端建立连接失败!\n");
closesocket(clientSocket);
WSACleanup();
return 0;
}
else
printf("客户端建立连接成功,准备发送数据!\n");
//发送数据
char *sendBuf = "Hello server, I am client";
int sendRes = send(clientSocket, sendBuf, (int)strlen(sendBuf), 0);
if (sendRes == SOCKET_ERROR)
{
printf("客户端send()出现错误 : %d\n", WSAGetLastError());
closesocket(clientSocket);
WSACleanup();
return 0;
}
else
printf("客户端发送数据成功!\n");
//接收服务端数据
/*通过建立的连接进行通信*/
int res = 0;
char *sendData = new char[100];
do
{
char revSerData[100] = "";
res = recv(clientSocket, revSerData, sizeof(revSerData), 0);
if (res > 0)
{
printf("Bytes received: %d\n", res);
printf("服务器发送的数据: %s\n", revSerData);
}
else if (res == 0)
printf("Connection closed\n");
else
printf("recv failed: %d\n", WSAGetLastError());
//cout << strlen(sendData) << endl;
cin >> sendData;
if (strcmp(sendData, "q") == 0)
{
printf("客户端停止发送数据!\n");
break;
}
//发送数据
send(clientSocket, sendData, strlen(sendData), 0);
} while (res > 0);
closesocket(clientSocket);
WSACleanup();
}