【转】mingw中的socket基础

原文地址：http://blog.neohope.com/2012/01/14/mingw_socket_basic/
1.客户端简单例子
myc.c

1. #define MINGW32
   
2.  
   
3. #include <stdio.h>
   
4. #include <stdlib.h>
   
5. #include <string.h>
   
6.  
   
7. #ifdef MINGW32
   
8. #include <winsock2.h>
   
9. #else
   
10. #include <sys/socket.h>
    
11. #include <arpa/inet.h>
    
12. #endif
    
13.  
    
14. #define MAXLINE 1024
    
15.  
    
16. int main(int argc,char **argv)
    
17. {
    
18.   int sockfd,n;
    
19.   char receline[MAXLINE+1];
    
20.   struct sockaddr_in serveraddr;
    
21.  
    
22.   //输入参数太少，退出
    
23.   if(argc != 2)
    
24.   {
    
25.     printf("Usage :%s IP_address\n", argv[0]);
    
26.     exit(0);
    
27.   }
    
28.  
    
29.   #ifdef MINGW32
    
30.   //Winsows下启用socket
    
31.   WSADATA wsadata;
    
32.   if(WSAStartup(MAKEWORD(1,1),&wsadata)==SOCKET_ERROR)
    
33.   {
    
34.     printf("WSAStartup() fail\n");
    
35.     exit(0);
    
36.   }
    
37.   #endif
    
38.  
    
39.   //建立socket
    
40.   if((sockfd=socket(AF_INET,SOCK_STREAM,0))==-1)
    
41.   {
    
42.     printf("socket() fail\n");
    
43.     exit(0);
    
44.   }
    
45.  
    
46.   //设置协议及Port
    
47.   memset(&serveraddr,0,sizeof(serveraddr));
    
48.   serveraddr.sin_family = AF_INET;
    
49.   serveraddr.sin_port=htons(1024);
    
50.  
    
51.   //设置IP
    
52.   serveraddr.sin_addr.s_addr=inet_addr(argv[1]);
    
53.  
    
54.   //连接
    
55.   if(connect(sockfd,(struct sockaddr *)&serveraddr,sizeof(serveraddr))==-1)
    
56.   {
    
57.     printf("connect() fail\n");
    
58.     exit(0);
    
59.   }
    
60.  
    
61.   //读取数据并输入到标准输出
    
62.   #ifdef MINGW32
    
63.   while((n=recv(sockfd,receline,MAXLINE,0))>0)
    
64.   #else
    
65.   while((n=read(sockfd,receline,MAXLINE))>0)
    
66.   #endif
    
67.   {
    
68.     receline[n]=0;
    
69.     if(fputs(receline,stdout)==EOF)
    
70.     {
    
71.       printf("fputs() error\r\n");
    
72.     }
    
73.   }
    
74.  
    
75.   //没有获取数据
    
76.   if(n<0)
    
77.   {
    
78.     printf("read() fail\n");
    
79.   }
    
80.  
    
81.   #ifdef MINGW32
    
82.   //Winsows下关闭socket
    
83.   closesocket(sockfd);
    
84.   WSACleanup();
    
85.   #endif
    
86.  
    
87.   exit(0);
    
88. }

2.服务端简单例子
mys.c

1. #define MINGW32
   
2.  
   
3. #include <stdio.h>
   
4. #include <stdlib.h>
   
5. #include <string.h>
   
6.  
   
7. #ifdef MINGW32
   
8. #include <winsock2.h>
   
9. #else
   
10. #include <sys/socket.h>
    
11. #include <arpa/inet.h>
    
12. #endif
    
13.  
    
14. #define LISTENQ 10
    
15.  
    
16. int main(int argc,char *argv[])
    
17. {
    
18.   int serverfd,connectfd;
    
19.   struct sockaddr_in serveraddr;
    
20.   char buff[1024];
    
21.   time_t tlick;
    
22.   int iRet;
    
23.  
    
24.   #ifdef MINGW32
    
25.   //Winsows下启用socket
    
26.   WSADATA wsadata;
    
27.   if(WSAStartup(MAKEWORD(1,1),&wsadata)==SOCKET_ERROR)
    
28.   {
    
29.     printf("WSAStartup() fail\n");
    
30.     exit(0);
    
31.   }
    
32.   #endif
    
33.  
    
34.   //新建socket
    
35.   printf("socket()\n");
    
36.   serverfd=socket(AF_INET,SOCK_STREAM,0);
    
37.   if(serverfd==-1)
    
38.   {
    
39.     printf("socket() fail\n");
    
40.     exit(0);
    
41.   }
    
42.  
    
43.   //清零
    
44.   memset(&serveraddr,0,sizeof(serveraddr));
    
45.  
    
46.   //设置协议
    
47.   serveraddr.sin_family=AF_INET;
    
48.   //设置IP
    
49.   serveraddr.sin_addr.s_addr=htonl(INADDR_ANY);
    
50.   //设置Port
    
51.   serveraddr.sin_port=htons(1024);
    
52.  
    
53.   //绑定端口，监听1024端口的任何请求
    
54.   printf("bind()\n");
    
55.   iRet=bind(serverfd,(struct sockaddr*)&serveraddr,sizeof(serveraddr));
    
56.   if(iRet==-1)
    
57.   {
    
58.     printf("bind() fail\n");
    
59.     exit(0);
    
60.   }
    
61.  
    
62.   //监听端口，最大并发数10
    
63.   printf("listen()\n");
    
64.   iRet=listen(serverfd,LISTENQ);
    
65.   if(iRet==-1)
    
66.   {
    
67.     printf("listen() fail\n");
    
68.     exit(0);
    
69.   }
    
70.  
    
71.   //接受请求，发送主机时间
    
72.   for(;;)
    
73.   {
    
74.     printf("Waiting for connection...\n");
    
75.     //接受请求
    
76.     connectfd=accept(serverfd,(struct sockaddr*)NULL,NULL);
    
77.     //获取时间
    
78.     tlick=time(NULL);
    
79.     //格式化时间
    
80.     snprintf(buff,sizeof(buff),"From mys:\n%s",ctime(&tlick));
    
81.     //写入时间
    
82.     //关闭请求
    
83.     #ifdef MINGW32
    
84.     send(connectfd,buff,strlen(buff),0);
    
85.     closesocket(connectfd);
    
86.     #else
    
87.     write(connectfd,buff,strlen(buff));
    
88.     close(connectfd);
    
89.     #endif
    
90.   }
    
91.  
    
92.   #ifdef MINGW32
    
93.   //Winsows下关闭socket
    
94.   closesocket(serverfd);
    
95.   WSACleanup();
    
96.   #endif
    
97.  
    
98.   //退出
    
99.   exit(0);
    
100. }

3.Makefile

1. all:mys myc
3. mys:mys.c
4. gcc -g -o mys mys.c -l wsock32
6. myc:myc.c
7. gcc -g -o myc myc.c -l wsock32
9. clean:
10. del *~ *.o *.exe