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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#define PORT 53
#define MAXLINE 1024
int
main ()
{
int sockfd;
char buffer[MAXLINE];
char *hello = "Hello from server";
struct sockaddr_in servaddr, cliaddr;
char name[128] = { 0 };
// Creating socket file descriptor
if ((sockfd = socket (AF_INET, SOCK_DGRAM, 0)) < 0)
{
perror ("socket creation failed");
exit (EXIT_FAILURE);
}
memset (&servaddr, 0, sizeof (servaddr));
memset (&cliaddr, 0, sizeof (cliaddr));
// Filling server information
servaddr.sin_family = AF_INET; // IPv4
servaddr.sin_addr.s_addr = inet_addr ("182.167.50.30");
servaddr.sin_port = htons (PORT);
if (bind (sockfd, (const struct sockaddr *) &servaddr,
sizeof (servaddr)) < 0)
{
perror ("bind failed");
exit (EXIT_FAILURE);
}
int len, n;
n = recvfrom (sockfd, (char *) buffer, MAXLINE,
MSG_WAITALL, (struct sockaddr *) &cliaddr, &len);
buffer[n] = '\0';
(void) gethostname (name, 127);
printf ("Client : %s \n", buffer);
sendto (sockfd, (const char *) hello, strlen (hello),
MSG_CONFIRM, (const struct sockaddr *) &cliaddr, len);
printf ("%s\n", hello);
return 0;
}
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