UNIX Domain Socket Communication instance

Source: Internet
Author: User
Tags unix domain socket file permissions
Socket Server side: SERVER.C
Socket read-Write default non-blocking
#include <stdio.h> #include <stdlib.h> #include <string.h> #include <malloc.h> #include <sys /types.h> #include <errno.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/select.h > #include <unistd.h> #include <termios.h> #include <sys/stat.h>/********** Timer header file ************** * * #include <sys/time.h> #include <signal.h>/*********** Socket communication header file **********/#include <sys/	socket.h> #include <sys/un.h> #define Unix_domain "/tmp/unix2.domain" static char recv_php_buf[256];		Buffer static int recv_php_num=0 receiving the client data;
Receives the total length of the client data const char RECV_PHP_BUF1[20]={0X00,0X01,0X02,0X03,0X04,0X05,0X06}; 
	void Main () {socklen_t clt_addr_len; 
	int listen_fd; 
	int com_fd; 
	int ret=0; 
	
	int i; 
	int Len; 
	struct Sockaddr_un clt_addr; 
	struct Sockaddr_un srv_addr; 
		while (1) {//Create socket for communication, the communication domain is UNIX communication domain Listen_fd=socket (af_unix,sock_stream,0); if (listen_fd<0) {perror ("Cannot create listening socket "); 
		Continue 
				else {while (1) {//Set server address parameter Srv_addr.sun_family=af_unix; 
				strncpy (srv_addr.sun_path,unix_domain,sizeof (Srv_addr.sun_path)-1); 
				Unlink (Unix_domain); 
				Binding sockets and server address information Ret=bind (LISTEN_FD, (struct sockaddr*) &srv_addr,sizeof (SRV_ADDR)); 
					if (ret==-1) {perror ("Cannot bind server socket"); 
					Close (LISTEN_FD); 
					Unlink (Unix_domain); 
				Break 
				//the socket is monitored to determine whether there is a connection request Ret=listen (listen_fd,1); 
					if (ret==-1) {perror ("Cannot listen the client connect request"); 
					Close (LISTEN_FD); 
					Unlink (Unix_domain); 
				Break chmod (unix_domain,00777);//Set Communication file permissions while (1) {///when there is a connection request, call the Accept function to establish a connection between the server and the client len=sizeof (CLT 
					_ADDR); 
					Com_fd=accept (LISTEN_FD, (struct sockaddr*) &clt_addr,&len); 
						if (com_fd<0) {perror ("Cannot accept client connect request"); 
						Close (LISTEN_FD); Unlink (UNIX_domain); 
					Break 
					//Read and output the connection information sent by the client memset (recv_php_buf,0,256); 
					Recv_php_num=read (com_fd,recv_php_buf,sizeof (RECV_PHP_BUF));
					printf ("\n=====recv=====\n"); 
					for (i=0;i<recv_php_num;i++) printf ("%d", recv_php_buf[i]);
					printf ("\ n"); /*if (recv_php_buf[0]==0x02) {if (recv_php_buf[recv_php_num-1]==0x00) {recv_php_buf[recv_php_num-1
						]=0x01;
						else {recv_php_buf[recv_php_num-1]=0x00;
					}} * * *//recv_php_buf[20]+=1;
					Write (Com_fd,recv_php_buf,recv_php_num);
					printf ("\n=====send=====\n"); 
					for (i=0;i<recv_php_num;i++) printf ("%d", recv_php_buf[i]);
					printf ("\ n");
					Write (com_fd,recv_php_buf,20);

 Close (COM_FD)//Note To turn off the connection symbol, or it will exceed the number of connections and the error}}}
socket client: client.c 
#include <stdio.h> #include <stdlib.h> #include <string.h> #include <malloc.h> #include <sys /types.h> #include <errno.h> #include <sys/stat.h> #include <fcntl.h> #include <sys/select.h > #include <unistd.h> #include <termios.h> #include <sys/stat.h>/********** Timer header file ************** * * #include <sys/time.h> #include <signal.h>/*********** Socket communication header file **********/#include <sys/ socket.h> #include <sys/un.h> #include <sys/ioctl.h> #pragma pack (1)//set to 1-byte alignment #define UNIX_DOMAIN2 "	
/tmp/unix2.domain "Static Char recv_php_buf[256]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07};
	struct Test {char A;
	int b;




int C;
}se;
	void Main (void) {int connect_fd;
	int ret=0;
	int i; 
	static struct Sockaddr_un srv_addr;
	printf ("IPC communication thread \ n"); 
		while (1)//{//create socket for communication, the communication domain is UNIX communication domain Connect_fd=socket (af_unix,sock_stream,0); 
		printf ("%d\n", CONNECT_FD); if (connect_fd<0) {PerroR ("Cannot create communication socket"); 
			printf ("%d\n", CONNECT_FD);
		Continue 
				else {//while (1)//{Srv_addr.sun_family=af_unix;
			
				strcpy (srv_addr.sun_path,unix_domain2); 
				Connect Server Ret=connect (connect_fd, (struct sockaddr*) &srv_addr,sizeof (SRV_ADDR)); 
					if (ret==-1) {close (CONNECT_FD);
					printf ("Connect fail\n");			Break
					Recreate the socket} else {//Otherwise, connect the server successfully//while (1)//{se.a=0x01;
					se.b=0x01020304;
					se.c=0x05060708;
					Write (connect_fd,recv_php_buf,20);//Transfer data to an external application, sending the actual length//write (connect_fd,&se,sizeof (struct test)); 							 memset (recv_php_buf,0,sizeof (RECV_PHP_BUF));
					Empty Socket_buf//sleep (1);
					Fcntl (Connect_fd,f_setel,o_nonblock);
					Read (connect_fd,recv_php_buf,sizeof (RECV_PHP_BUF));
					printf ("Receive over\n");
					for (i=0;i<20;i++) printf ("%x", Recv_php_buf[i]);
					printf ("%x", se.a);
					printf ("%x", se.b); printf ("%x", se.c);
					Close (CONNECT_FD);							
				Break
		}//}//close (CONNECT_FD); }
	
	//}

}



Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.