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随想录(windows和linux进行socket通信)

覃榜言 2022-11-23 阅读 145


    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,


#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,


#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。    




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