ser1.c

/*
 *  ser1.c  -   For ICT374 Topic 8
 *              Hong Xie
 *              Last modified: 16/10/2020
 *      test for UNIX domain stream socket (server part)
 *      This is a very **crude** program.
 */

#include  <unistd.h>
#include  <stdlib.h>
#include  <sys/types.h>
#include  <sys/socket.h>
#include  <sys/un.h>
#include  <string.h>
#include  <errno.h>

char serversockname[]="serversocket";

int main()
{
     int sd, nsd, n;
     char buf[256];
     struct sockaddr_un server_addr;
     struct sockaddr_un client_addr;
     int  client_addr_len;

     /* set up listening socket sd */
     sd = socket(PF_UNIX, SOCK_STREAM, 0);

     /* bind server address to socket sd */
     server_addr.sun_family = PF_UNIX;
     strcpy(server_addr.sun_path, serversockname);
     bind(sd, (struct sockaddr *)&server_addr,sizeof(server_addr));

     /* set socket sd to a listening socket */
     listen(sd, 1);

     /* accept connection request */
     client_addr_len = sizeof(client_addr);
     nsd = accept(sd, (struct sockaddr *)&client_addr, (socklen_t *)&client_addr_len);

     /* data transfer on connected socket ns */
     n = read(nsd, buf, sizeof(buf));
     write(nsd, buf, n);

     exit(0);
}