client.c:
1 //Client.cpp
2 #include "StdAfx.h"
3 #include <winsock2.h>
4 #include <stdio.h>
5 #include <windows.h>
6 #pragma comment(lib,"ws2_32.lib")
7 int main(int argc, char* argv[]){
8 //判断是否输入了IP地址和端口号
9 if(argc!=3){
10 printf("Usage: %s IPAddress PortNumber/n",argv[0]);
11 exit(-1);
12 }
13 //把字符串的IP地址转化为u_long
14 unsigned long ip;
15 if((ip=inet_addr(argv[1]))==INADDR_NONE){
16 printf("不合法的IP地址：%s",argv[1]);
17 exit(-1);
18 }
19 //把端口号转化成整数
20 short port;
21 if((port = atoi(argv[2]))==0){
22 printf("端口号有误！");
23 exit(-1);
24 }
25 printf("Connecting to %s:%d....../n",inet_ntoa(*(in_addr*)&ip),port);
26 WSADATA wsa;
27 //初始化套接字DLL
28 if(WSAStartup(MAKEWORD(2,2),&wsa)!=0){
29 printf("套接字初始化失败!");
30 exit(-1);
31 }
32 //创建套接字
33 SOCKET sock;
34 if((sock=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET){
35 printf("创建套接字失败！");
36 exit(-1);
37 }
38 struct sockaddr_in serverAddress;
39 memset(&serverAddress,0,sizeof(sockaddr_in));
40 serverAddress.sin_family=AF_INET;
41 serverAddress.sin_addr.S_un.S_addr = ip;
42 serverAddress.sin_port = htons(port);
43 //建立和服务器的连接
44 if(connect(sock,(sockaddr*)&serverAddress,sizeof(serverAddress))==SOCKET_ERROR){
45 printf("建立连接失败！");
46 exit(-1);
47 }
48 char buf[4096];
49 // while(1){
50 {
51 //printf(">");
52 //从控制台读取一行数据
53 //gets(buf);
54 //发送给服务器
55 if(send(sock,"wangkangluo1",strlen(buf),0)==SOCKET_ERROR){
56 printf("发送数据失败！");
57 exit(-1);
58 }
59 int bytes;
60 if((bytes=recv(sock,buf,sizeof(buf),0))==SOCKET_ERROR){
61 printf("接收数据失败!/n");
62 exit(-1);
63 }
64 buf[bytes]='/0';
65 printf("Message from %s: %s/n",inet_ntoa(serverAddress.sin_addr),buf);
66 }
67 //清理套接字占用的资源
68 WSACleanup();
69 return 0;
70 }
server.c:
1 // reboot3.cpp : 定义控制台应用程序的入口点。
2 //
3
4 #include "stdafx.h"
5
6 //Server.cpp
7 #include <winsock2.h>
8 #include <stdio.h>
9 #include <windows.h>
10 #pragma comment(lib,"ws2_32.lib")
11 int main(int argc, char* argv[]){
12 //判断是否输入了端口号
13 if(argc!=2){
14 printf("Usage: %s PortNumber/n",argv[0]);
15 exit(-1);
16 }
17 //把端口号转化成整数
18 short port;
19 if((port = atoi(argv[1]))==0){
20 printf("端口号有误！");
21 exit(-1);
22 }
23 WSADATA wsa;
24 //初始化套接字DLL
25 if(WSAStartup(MAKEWORD(2,2),&wsa)!=0){
26 printf("套接字初始化失败!");
27 exit(-1);
28 }
29 //创建套接字
30 SOCKET serverSocket;
31 if((serverSocket=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==INVALID_SOCKET){
32 printf("创建套接字失败！");
33 exit(-1);
34 }
35 struct sockaddr_in serverAddress;
36 memset(&serverAddress,0,sizeof(sockaddr_in));
37 serverAddress.sin_family=AF_INET;
38 serverAddress.sin_addr.S_un.S_addr = htonl(INADDR_ANY);
39 serverAddress.sin_port = htons(port);
40 //绑定
41 if(bind(serverSocket,(sockaddr*)&serverAddress,sizeof(serverAddress))==SOCKET_ERROR){
42 printf("套接字绑定到端口失败！端口: %d/n",port);
43 exit(-1);
44 }
45 //进入侦听状态
46 if(listen(serverSocket,SOMAXCONN)==SOCKET_ERROR){
47 printf("侦听失败！");
48 exit(-1);
49 }
50 printf("Server %d is listening....../n",port);
51 SOCKET clientSocket;//用来和客户端通信的套接字
52 struct sockaddr_in clientAddress;//用来和客户端通信的套接字地址
53 memset(&clientAddress,0,sizeof(clientAddress));
54 int addrlen = sizeof(clientAddress);
55 //接受连接
56 if((clientSocket=accept(serverSocket,(sockaddr*)&clientAddress,&addrlen))==INVALID_SOCKET){
57 printf("接受客户端连接失败！");
58 exit(-1);
59 }
60 printf("Accept connection from %s/n",inet_ntoa(clientAddress.sin_addr));
61 char buf[4096];
62 while(1){
63 //接收数据
64 int bytes;
65 if((bytes=recv(clientSocket,buf,sizeof(buf),0))==SOCKET_ERROR){
66 printf("接收数据失败!/n");
67 exit(-1);
68 }
69 buf[bytes]='/0';
70 printf("Message from %s: %s/n",inet_ntoa(clientAddress.sin_addr),buf);
71 if(send(clientSocket,buf,bytes,0)==SOCKET_ERROR){
72 printf("发送数据失败！");
73 exit(-1);
74 }
75 }
76 //清理套接字占用的资源
77 WSACleanup();
78 return 0;
79 }
完
来源：https://www.cnblogs.com/wangkangluo1/archive/2012/05/01/2477966.html