windows socket 编程

服务器：

// server.cpp : 定义控制台应用程序的入口点。
//

#include "stdafx.h"
#include <stdio.h>
#include <WinSock2.h>
#pragma  comment(lib ,"ws2_32.lib")

int main(int argc,char *argv[])
{
//初始化WSA
WORD sockVersion = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(sockVersion, &wsaData) != 0) {
return 0;
}

//创建Socket
SOCKET server = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (server == INVALID_SOCKET) {
printf("socket error");
return 0;
}

//绑定IP和端口
sockaddr_in	sin;
sin.sin_family = AF_INET;
sin.sin_port = htons(8888);
sin.sin_addr.S_un.S_addr = INADDR_ANY;
if (bind(server, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR) {
printf("bind error");
return 0;
}

//监听
if (listen(server, 5) == SOCKET_ERROR) {
printf("listen error");
return 0;
}

SOCKET client;
sockaddr_in	remoteAddr;
int nAddrlen = sizeof(remoteAddr);

char revData[255];

//接受数据
while (true) {

printf("等待连接中...\n");

client = accept(server, (SOCKADDR*)&remoteAddr, &nAddrlen);
if (client == INVALID_SOCKET) {
printf("accept error");
continue;
}

printf("接受到一个连接:%s \r\n", inet_ntoa(remoteAddr.sin_addr));

int ret = recv(client, revData, 255, 0);
if (ret > 0) {
revData[ret] = 0x00;

printf("从客户端获得数据%s\n", revData);

if (strcmp(revData, "yzr") == 0) {
char * sendData = "你好，你的学号是146xxxxxxx";
send(client, sendData, strlen(sendData), 0);
}
else {
char * sendData = "抱歉，未找到你的学号数据";
send(client, sendData, strlen(sendData), 0);
}
}

closesocket(client);
}

closesocket(server);
WSACleanup();

return 0;
}

客户端

#include "stdafx.h"
#include <WinSock2.h>
#include <stdio.h>

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

int main(int argc, char *argv[])
{
//初始化WSA
WORD sockVersiono = MAKEWORD(2, 2);
WSADATA wsaData;
if (WSAStartup(sockVersiono, &wsaData) != 0) {
printf("初始化错误!\n");
return 0;
}

//创建套接字
SOCKET client = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (client == INVALID_SOCKET) {
printf("创建Socket失败!\n");
return 0;
}

//填入服务器地址
sockaddr_in serverAddr;
serverAddr.sin_family = AF_INET;
serverAddr.sin_port = htons(8888);
serverAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");

//连接服务器
if (connect(client, (sockaddr*)&serverAddr, sizeof(serverAddr))) {
printf("连接错误!\n");
closesocket(client);
return 0;
}

printf("连接成功!!请输入你需要发送的数据:");

//输入数据并发送至服务器
char sendData[255];

fgets(sendData, 255, stdin);

send(client, sendData, strlen(sendData), 0);

//接受服务器返回的数据
char revData[255];
int ret = recv(client, revData, 255, 0);
if (ret > 0) {
revData[ret] = 0x00;
printf("从服务器获得返回数据:%s",revData);
}
system("pause");

closesocket(client);
WSACleanup();

return 0;

}