win下 socket基础实现（C++) 01

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本代码实现功能：

写一个socket 通讯的服务端和接收端，发送”Hi, I’m XM”,收到”I heard”，要求服务端和接收端都有显示信息

只提供完整代码，关于函数具体用法和作用还请移步其它博客，有很多。

服务端代码：

#include <iostream>
#include <winsock2.h>

#pragma comment(lib, "ws2_32.lib")

using namespace std;

int main()
{
//初始化WinSock服务
WSADATA WsaDat;
if (WSAStartup(MAKEWORD(2,2), &WsaDat) != 0)
{
cout << "WinSock服务初始化失败！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//创建套接字
SOCKET Socket = socket(AF_INET, SOCK_STREAM,IPPROTO_TCP);
if (Socket == INVALID_SOCKET)
{

cout << "创建套接字错误！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//主机名解析，服务器不需要主动连接客户机
/*struct hostent *host;
if ((host = gethostbyname("localhost")) == NULL)
{
cout << "主机名解析失败！\n";
WSACleanup();
system("PAUSE");
return 0;
}*/
//配置服务器地址结构信息
SOCKADDR_IN serverInf;
serverInf.sin_port = htons(8888);
serverInf.sin_family = AF_INET;
serverInf.sin_addr.s_addr = INADDR_ANY;
//连接服务器, 这就是服务器啊
/*if (connect(Socket, (SOCKADDR *)(&SockAddr), sizeof(SockAddr)) != 0)
{
cout << "连接服务器失败！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//接受信息并显示
char buffer[1024];
memset(buffer, 0, sizeof(buffer));
int inDataLength = recv(Socket, buffer, 1024, 0);
cout << buffer;*/
if (bind(Socket, (SOCKADDR*)(&serverInf), sizeof(serverInf)) == SOCKET_ERROR)
{
cout << "不能绑定地址信息到套接字\n";
WSACleanup();
system("PAUSE");
return 0;
}
listen(Socket, 1);
SOCKET TempSock = SOCKET_ERROR;
while (TempSock == SOCKET_ERROR)
{
cout << "服务器正在等待客户机连接...\n";
TempSock = accept(Socket, NULL, NULL);
}
Socket = TempSock;
cout << "有客户机已连接！\n";
char buffer_r[1024];
memset(buffer_r, 0, sizeof(buffer_r));
int inDataLength = recv(Socket, buffer_r, 1024, 0);
cout << "已接收：" << buffer_r << endl;
char *szMessage = "I heard!\n";
send(Socket, szMessage, strlen(szMessage),0);
cout << "已发送：I heard!" << endl;
//断开套接字连接，不许发送但允许接收
shutdown(Socket, SD_SEND);
//关闭套接字，释放资源
closesocket(Socket);
//guanbiWinSock服务，清理
WSACleanup();
system("PAUSE");
return 0;
}

客户端代码：

#include <iostream>
#include <winsock2.h>
#include <string>

#pragma comment(lib, "ws2_32.lib")

using namespace std;

int main()
{
//初始化WinSock服务
WSADATA WsaDat;
if (WSAStartup(MAKEWORD(2,2), &WsaDat) != 0)
{
cout << "WinSock服务初始化失败！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//创建套接字
SOCKET Socket = socket(AF_INET, SOCK_STREAM,IPPROTO_TCP);
if (Socket == INVALID_SOCKET)
{

cout << "创建套接字错误！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//主机名解析
struct hostent *host;
if ((host = gethostbyname("localhost")) == NULL)
{
cout << "主机名解析失败！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//配置服务器地址结构信息
SOCKADDR_IN SockAddr;
SockAddr.sin_port = htons(8888);
SockAddr.sin_family = AF_INET;
SockAddr.sin_addr.s_addr = *((unsigned long *)host -> h_addr);
//连接服务器
if (connect(Socket, (SOCKADDR *)(&SockAddr), sizeof(SockAddr)) != 0)
{
cout << "连接服务器失败！\n";
WSACleanup();
system("PAUSE");
return 0;
}
//发送消息
char *s = "Hi, I'm XM!";
send(Socket, s, strlen(s), 0);
cout << "已发送：Hi, I'm XM!" << endl;
//接受信息并显示
char buffer_r[1024];
memset(buffer_r, 0, sizeof(buffer_r));
int inDataLength = recv(Socket, buffer_r, 1024, 0);
cout << "已接收：" << buffer_r;
//断开套接字连接，不许发送但允许接收
shutdown(Socket, SD_SEND);
//关闭套接字，释放资源
closesocket(Socket);
//关闭WinSock服务，清理
WSACleanup();
system("PAUSE");
return 0;
}

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