计算机网络实验之 windows下 C++ 实现 socket 编程展示

本篇博客只是先展示一下代码，具体的编程相关请看后面的博客吧

服务器端代码 server.cpp

 1 #include <stdio.h>
 2 #include <winsock2.h>
 3 
 4 #pragma comment(lib,"ws2_32.lib")
 5 
 6 int main(int argc, char* argv[])
 7 {
 8     //初始化WSA
 9     WORD sockVersion = MAKEWORD(2,2);
10     WSADATA wsaData;
11     if(WSAStartup(sockVersion, &wsaData)!=0)
12     {
13         return 0;
14     }
15 
16     //创建套接字
17     SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
18     if(slisten == INVALID_SOCKET)
19     {
20         printf("socket error !");
21         return 0;
22     }
23 
24     //绑定IP和端口
25     sockaddr_in sin;
26     sin.sin_family = AF_INET;
27     sin.sin_port = htons(8888);
28     sin.sin_addr.S_un.S_addr = INADDR_ANY;
29     if(bind(slisten, (LPSOCKADDR)&sin, sizeof(sin)) == SOCKET_ERROR)
30     {
31         printf("bind error !");
32     }
33 
34     //开始监听
35     if(listen(slisten, 5) == SOCKET_ERROR)
36     {
37         printf("listen error !");
38         return 0;
39     }
40 
41     //循环接收数据
42     SOCKET sClient;
43     sockaddr_in remoteAddr;
44     int nAddrlen = sizeof(remoteAddr);
45     char revData[255];
46     while (true)
47     {
48         printf("等待连接...\n");
49         sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
50         if(sClient == INVALID_SOCKET)
51         {
52             printf("accept error !");
53             continue;
54         }
55         printf("接受到一个连接：%s \r\n", inet_ntoa(remoteAddr.sin_addr));
56 
57         //接收数据
58         int ret = recv(sClient, revData, 255, 0);
59         if(ret > 0)
60         {
61             revData[ret] = 0x00;
62             printf(revData);
63         }
64 
65         //发送数据
66         const char * sendData = "你好，TCP客户端！\n";
67         send(sClient, sendData, strlen(sendData), 0);
68         closesocket(sClient);
69     }
70 
71     closesocket(slisten);
72     WSACleanup();
73     return 0;
74 }

客户端代码 client.cpp:

 1 #include<WINSOCK2.H>
 2 #include<STDIO.H>
 3 #include<iostream>
 4 #include<cstring>
 5 using namespace std;
 6 #pragma comment(lib, "ws2_32.lib")
 7 
 8 int main()
 9 {
10     WORD sockVersion = MAKEWORD(2, 2);
11     WSADATA data;
12     if(WSAStartup(sockVersion, &data)!=0)
13     {
14         return 0;
15     }
16     while(true){
17         SOCKET sclient = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
18         if(sclient == INVALID_SOCKET)
19         {
20             printf("invalid socket!");
21             return 0;
22         }
23 
24         sockaddr_in serAddr;
25         serAddr.sin_family = AF_INET;
26         serAddr.sin_port = htons(8888);
27         serAddr.sin_addr.S_un.S_addr = inet_addr("127.0.0.1");
28         if(connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
29         {  //连接失败
30             printf("connect error !");
31             closesocket(sclient);
32             return 0;
33         }
34 
35         string data;
36         cin>>data;
37         const char * sendData;
38         sendData = data.c_str();   //string转const char*
39         //char * sendData = "你好，TCP服务端，我是客户端\n";
40         send(sclient, sendData, strlen(sendData), 0);
41         //send()用来将数据由指定的socket传给对方主机
42         //int send(int s, const void * msg, int len, unsigned int flags)
43         //s为已建立好连接的socket，msg指向数据内容，len则为数据长度，参数flags一般设0
44         //成功则返回实际传送出去的字符数，失败返回-1，错误原因存于error
45 
46         char recData[255];
47         int ret = recv(sclient, recData, 255, 0);
48         if(ret>0){
49             recData[ret] = 0x00;
50             printf(recData);
51         }
52         closesocket(sclient);
53     }
54 
55 
56     WSACleanup();
57     return 0;
58 
59 }