TCP Time Server Program

Purpose - Server to send time to the client(TCP)

Program Status: Tested, Program Difficulty: Very Easy

Program written by G.Vivek Venkatesh

Screen-shot of output:



Program

server.c

#include "stdio.h"
#include "sys/types.h"
#include "netinet/in.h"
#include "string.h"
#include "sys/socket.h"
#include "stdlib.h"
#include "unistd.h"
#include "time.h"
main()
{
int sd,i,len,bi,nsd,port;
char content[30],buff[30],last_received[30];
struct sockaddr_in ser,cli;
if((sd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==-1)
{
printf("\n Socket problem");
return 0;
}
printf("\n Socket created\n");
bzero((char*)&cli,sizeof(ser));
printf("ENTER PORT NO:\n");
scanf("%d",&port);
printf("\n Port Address is %d\n:",port);
ser.sin_family=AF_INET;
ser.sin_port=htons(port);
ser.sin_addr.s_addr=htonl(INADDR_ANY);

bi=bind(sd,(struct sockaddr *)&ser,sizeof(ser));
if(bi==-1)
{
printf("\n bind error, port busy, plz change port in client and server");
return 0;
}
i=sizeof(cli);
listen(sd,5);
nsd = accept(sd,((struct sockaddr *)&cli),&i);

if(nsd==-1)
{
printf("\ncheck the description parameter\n");
return 0;
}
printf("\nConnection accepted");

time_t ticks;
ticks=time(NULL);
snprintf(buff,sizeof(buff),"%24s\r\n",ctime(&ticks));

send(nsd,buff,30,0);
printf("\n Bye..");
send(nsd,"EOF",4,0);
close(sd);
close(nsd);
return 0;
}


client.c

#include "stdio.h"
#include "sys/types.h"
#include "netinet/in.h"
#include "string.h"
#include "sys/socket.h"
#include "stdlib.h"
#include "unistd.h"
int main()
{
int sd,con,port,i;
char content[30];
struct sockaddr_in cli;
if((sd=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP))==-1)
{
printf("\n Socket problem");
return 0;
}
bzero((char*)&cli,sizeof(cli));
cli.sin_family = AF_INET;
printf("ENTER PORT NO");
scanf("%d",&port);
cli.sin_port=htons(port);
cli.sin_addr.s_addr=htonl(INADDR_ANY);
con=connect(sd,(struct sockaddr*)&cli,sizeof(cli));
if(con==-1)
{
printf("\n connection error");
return 0;
}
i=recv(sd,content,30,0);
printf("Received from server %s\n",content);
close(sd);
return 0;
}

Download Source code

tserver.c

tclient.c