DISPLAYING DATE AND TIME USING UDP

By karthick , in , 3 Comments

Server program

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

int main()
{
int sfd,r,bi,port;
char buff[1024];
struct sockaddr_in servaddr,cliaddr;
socklen_t clilen;
sfd=socket(AF_INET,SOCK_DGRAM,0);
if(sfd==-1)
{
perror("Socket");
return 0;
}

printf("\n Enter the port no:");
scanf("%d",&port);
printf("The port no is:%d\n",port);
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(port);
servaddr.sin_addr.s_addr = INADDR_ANY;

bi=bind(sfd,(struct sockaddr*)&servaddr,sizeof(servaddr));
if(bi==-1)
{
perror("Bind()");
return 0;
}

clilen = sizeof(cliaddr);
r=recvfrom(sfd,buff,sizeof(buff),0,(struct sockaddr*)&cliaddr,&clilen);
buff[r]=0;
time_t ticks;
ticks = time(NULL);
snprintf(buff,sizeof(buff),"%24s\r\n",ctime(&ticks));
sendto(sfd,buff,sizeof(buff),0,(struct sockaddr*)&cliaddr,sizeof(cliaddr));
exit(0);
return 0;
}

Client program

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

int main()
{
int listenfd,port,r;
char buff[1024];
struct sockaddr_in servaddr,cliaddr;
socklen_t servlen;
listenfd = socket(AF_INET,SOCK_DGRAM,0);
if(listenfd==-1)
{
perror("Socket");
return 0;
}

printf("\n Enter the port no:");
scanf("%d",&port);
printf("The port no is:%d",port);
servaddr.sin_family = AF_INET;
servaddr.sin_port = htons(port);
servaddr.sin_addr.s_addr = INADDR_ANY;
sendto(listenfd,buff,sizeof(buff),0,(struct sockaddr*)&servaddr,sizeof(servaddr));
r=recvfrom(listenfd,buff,sizeof(buff),0,(struct sockaddr*)&servaddr,&servlen);
buff[r]=0;
printf("\n The time received from the server:%s\n",buff);
exit(0);
return 0;
}


OUTPUT

SERVER

[11ca013@mcalinux network]$ cc 3udpser.c
[11ca013@mcalinux network]$ ./a.out

 Enter the port no:8686
The port no is:8686

CLIENT

[11ca013@mcalinux network]$ cc 3udpcli.c
[11ca013@mcalinux network]$ ./a.out
                                              
Enter the port no:8686
The port no is:8686

 The time received from the server: Thu Feb 14 14:16:44 2013

3 Response to "DISPLAYING DATE AND TIME USING UDP"

  1. Unknown says:
    21 June 2017 at 19:07
    This comment has been removed by the author.
    mani says:
    30 November 2018 at 21:48

    Thank you sir.

    Anonymous says:
    24 November 2020 at 13:05

    r,bi ?

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