『转』windows和linux进行socket通信

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    在公司里面，我们平时使用的机器一般都是windows系统，但是开发、编译的机器往往是linux服务器。通过ping、ftp、samba、telnet、ssh，人们可以很方便与服务器连接。windows系统使用的是windows socket，而linux使用的posix socket，那么这两个socket之间是怎么通信的呢？网上关于windows与windows通信的代码很多，linux与linux通信的代码也很多，但是windows和linux通信的代码很少。这里，我就想写一个简单的socket代码，实现linux和windows的通信。

    其实，广义一点看，网页访问、邮箱、游戏、聊天工具都是利用socket实现的，当然后面实现的逻辑要比我们写的代码复杂的多。但是，我们完全可以利用简单的代码来说明socket通信问题，能做到这一点就足够了。这也是我一直推崇的方法，用最简单的代码表达最实际的功能。

    windows侧的client代码，

[cpp] view plain copy print ?

  1. #include <stdio.h> 

  2. #include <Windows.h> 

  3.   

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

  5. #define  PORT 4000 

  6. #define  IP_ADDRESS "192.168.1.102" 

  7.   

  8. int main(int argc,char* argv[]) 

  9. { 

  10.     WSADATA  Ws; 

  11.     SOCKET ClientSocket; 

  12.     struct sockaddr_in ClientAddr; 

  13.     int Ret = 0; 

  14.     char SendBuffer[MAX_PATH]; 

  15.  

  16.     /* Init Windows Socket */ 

  17.     if ( WSAStartup(MAKEWORD(2,2), &Ws) != 0 ) 

  18.     { 

  19.         printf("Init Windows Socket Failed::%d\n", GetLastError()); 

  20.         return -1; 

  21.     } 

  22.   

  23.     /* Create Socket */ 

  24.     ClientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); 

  25.     if ( ClientSocket == INVALID_SOCKET ) 

  26.     { 

  27.         printf("Create Socket Failed::%d\n", GetLastError()); 

  28.         return -1; 

  29.     } 

  30.  

  31.     ClientAddr.sin_family = AF_INET; 

  32.     ClientAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS); 

  33.     ClientAddr.sin_port = htons(PORT); 

  34.     memset(ClientAddr.sin_zero, 0x00, 8); 

  35.  

  36.     /* connect socket */ 

  37.     Ret = connect(ClientSocket,(struct sockaddr*)&ClientAddr,sizeof(ClientAddr)); 

  38.     if ( Ret == SOCKET_ERROR ) 

  39.     { 

  40.         printf("Connect Error::%d\n", GetLastError()); 

  41.         return -1; 

  42.     } 

  43.     else 

  44.     { 

  45.         printf("Connect succedded!\n"); 

  46.     } 

  47.  

  48.     while (1) 

  49.     { 

  50.         scanf("%s", SendBuffer); 

  51.  

  52.         /* send data to server */ 

  53.         Ret = send(ClientSocket, SendBuffer, (int)strlen(SendBuffer), 0); 

  54.         if ( Ret == SOCKET_ERROR ) 

  55.         { 

  56.             printf("Send Info Error::%d\n", GetLastError()); 

  57.             break; 

  58.         } 

  59.          

  60.         if('q' == SendBuffer[0]) 

  61.         { 

  62.             break; 

  63.         } 

  64.     } 

  65.      

  66.     /* close socket */ 

  67.     closesocket(ClientSocket); 

  68.     WSACleanup(); 

  69.   

  70.     return 0; 

  71. } 

  72.   

    #include <stdio.h>
    #include <Windows.h>

    #pragma comment(lib,"ws2_32.lib")
    #define PORT 4000
    #define IP_ADDRESS "192.168.1.102"

    int main(int argc, char* argv[])
    {
    WSADATA Ws;
    SOCKET ClientSocket;
    struct sockaddr_in ClientAddr;
    int Ret = 0;
    char SendBuffer[MAX_PATH];

    /* Init Windows Socket */
if ( WSAStartup(MAKEWORD(2,2), &Ws) != 0 )
{
    printf("Init Windows Socket Failed::%d\n", GetLastError());
    return -1;
}

/* Create Socket */
ClientSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
if ( ClientSocket == INVALID_SOCKET )
{
    printf("Create Socket Failed::%d\n", GetLastError());
    return -1;
}

ClientAddr.sin_family = AF_INET;
ClientAddr.sin_addr.s_addr = inet_addr(IP_ADDRESS);
ClientAddr.sin_port = htons(PORT);
memset(ClientAddr.sin_zero, 0x00, 8);

/* connect socket */
Ret = connect(ClientSocket,(struct sockaddr*)&ClientAddr, sizeof(ClientAddr));
if ( Ret == SOCKET_ERROR )
{
    printf("Connect Error::%d\n", GetLastError());
    return -1;
}
else
{
    printf("Connect succedded!\n");
}

while (1)
{
    scanf("%s", SendBuffer);

	/* send data to server */
    Ret = send(ClientSocket, SendBuffer, (int)strlen(SendBuffer), 0);
    if ( Ret == SOCKET_ERROR )
    {
        printf("Send Info Error::%d\n", GetLastError());
        break;
    }
	
	if('q' == SendBuffer[0])
	{
		break;
	}
}

/* close socket */
closesocket(ClientSocket);
WSACleanup();

return 0;

    }

    linux侧的server代码，

[cpp] view plain copy print ?

  1. #include <netinet/in.h>     

  2. #include <sys/types.h>     

  3. #include <sys/socket.h>     

  4. #include <stdio.h>         

  5. #include <stdlib.h>        

  6. #include <string.h>        

  7.  

  8. #define HELLO_WORLD_SERVER_PORT    4000 

  9. #define LENGTH_OF_LISTEN_QUEUE 20 

  10. #define BUFFER_SIZE 1024 

  11.  

  12. int main(int argc,char **argv) 

  13. { 

  14.     struct sockaddr_in server_addr; 

  15.     int server_socket; 

  16.     int opt = 1; 

  17.     

  18.     bzero(&server_addr,sizeof(server_addr));  

  19.      

  20.     server_addr.sin_family = AF_INET; 

  21.     server_addr.sin_addr.s_addr = htons(INADDR_ANY); 

  22.     server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT); 

  23.  

  24.     /* create a socket */ 

  25.     server_socket = socket(PF_INET,SOCK_STREAM,0); 

  26.     if( server_socket < 0) 

  27.     { 

  28.         printf("Create Socket Failed!"); 

  29.         exit(1); 

  30.     } 

  31.   

  32.     /* bind socket to a specified address*/ 

  33.     setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &opt,sizeof(opt)); 

  34.     if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr))) 

  35.     { 

  36.         printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT);  

  37.         exit(1); 

  38.     } 

  39.  

  40.     /* listen a socket */ 

  41.     if(listen(server_socket, LENGTH_OF_LISTEN_QUEUE)) 

  42.     { 

  43.         printf("Server Listen Failed!");  

  44.         exit(1); 

  45.     } 

  46.      

  47.     /* run server */ 

  48.     while (1)  

  49.     { 

  50.         struct sockaddr_in client_addr; 

  51.         int client_socket;       

  52.         socklen_t length; 

  53.         char buffer[BUFFER_SIZE]; 

  54.  

  55.         /* accept socket from client */ 

  56.         length = sizeof(client_addr); 

  57.         client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length); 

  58.         if( client_socket < 0) 

  59.         { 

  60.             printf("Server Accept Failed!\n"); 

  61.             break; 

  62.         } 

  63.          

  64.         /* receive data from client */ 

  65.         while(1) 

  66.         { 

  67.             bzero(buffer, BUFFER_SIZE); 

  68.             length = recv(client_socket, buffer, BUFFER_SIZE, 0); 

  69.             if (length < 0) 

  70.             { 

  71.                 printf("Server Recieve Data Failed!\n"); 

  72.                 break; 

  73.             } 

  74.              

  75.             if('q' == buffer[0]) 

  76.             { 

  77.                 printf("Quit from client!\n"); 

  78.                 break; 

  79.             } 

  80.              

  81.             printf("%s\n", buffer); 

  82.         }    

  83.          

  84.         close(client_socket); 

  85.     } 

  86.      

  87.     close(server_socket); 

  88.     return 0; 

  89. } 

    #include <netinet/in.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <stdio.h>
    #include <stdlib.h>
    #include <string.h>

    #define HELLO_WORLD_SERVER_PORT 4000
    #define LENGTH_OF_LISTEN_QUEUE 20
    #define BUFFER_SIZE 1024

    int main(int argc, char **argv)
    {
    struct sockaddr_in server_addr;
    int server_socket;
    int opt = 1;

    bzero(&server_addr,sizeof(server_addr)); 

server_addr.sin_family = AF_INET;
server_addr.sin_addr.s_addr = htons(INADDR_ANY);
server_addr.sin_port = htons(HELLO_WORLD_SERVER_PORT);

/* create a socket */
server_socket = socket(PF_INET,SOCK_STREAM,0);
if( server_socket < 0)
{
    printf("Create Socket Failed!");
    exit(1);
}

/* bind socket to a specified address*/
setsockopt(server_socket, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
if( bind(server_socket,(struct sockaddr*)&server_addr,sizeof(server_addr)))
{
    printf("Server Bind Port : %d Failed!", HELLO_WORLD_SERVER_PORT); 
    exit(1);
}

/* listen a socket */
if(listen(server_socket, LENGTH_OF_LISTEN_QUEUE))
{
    printf("Server Listen Failed!"); 
    exit(1);
}

/* run server */
while (1) 
{
    struct sockaddr_in client_addr;
	int client_socket;		
    socklen_t length;
	char buffer[BUFFER_SIZE];

	/* accept socket from client */
	length = sizeof(client_addr);
    client_socket = accept(server_socket, (struct sockaddr*)&client_addr, &length);
    if( client_socket < 0)
    {
        printf("Server Accept Failed!\n");
        break;
    }
    
	/* receive data from client */
	while(1)
	{
		bzero(buffer, BUFFER_SIZE);
		length = recv(client_socket, buffer, BUFFER_SIZE, 0);
		if (length < 0)
		{
			printf("Server Recieve Data Failed!\n");
			break;
		}
		
		if('q' == buffer[0])
		{
			printf("Quit from client!\n");
			break;
		}
		
		printf("%s\n", buffer);
	}	
	
    close(client_socket);
}

close(server_socket);
return 0;

    }

    windows侧的代码使用vc6.0编译就可以，而linux侧的代码用gcc就ok了，即gcc server.c -o server。首先，在linux侧输入./server，然后打开widnows侧的client程序，然后在windows侧的每一个字符输入都会在linux打印出来。如果想退出，输入q即可。但是此时server不会退出，它在等待下一个client的通信，继续服务于大家，就是这么简单。

    这里的server和client代码是根据网友的代码修改而来，一并表示感谢。如有侵权，请邮件告知。

本文章迁移自http://blog.csdn.net/timberwolf_2012/article/details/8574809

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