UDP ECHO PROGRAM

*************************************SERVER*********************************

#include <sys/types.h>         
#include <sys/socket.h>
#include<stdio.h>
#include <unistd.h>
#include<netinet/in.h>
#include<string.h>
#define SERV_TCP_PORT 5035

int main(int argc,char**argv)
{
    int sockfd,clientfd,len;
    char tubelight[100];
    struct sockaddr_in server1,client1;
    sockfd=socket(AF_INET,SOCK_DGRAM,0);
    if(sockfd==-1)
    {
        printf("Socket Creation Fail\n");
    }
    else
    printf("Socet Created....\n");
    server1.sin_family=AF_INET;
    server1.sin_port=htons(SERV_TCP_PORT);
    server1.sin_addr.s_addr=INADDR_ANY;
    bind(sockfd,(struct sockaddr*)&server1,sizeof(server1));
   
    printf("Binding......\n");
    listen(sockfd,5);
    printf("Listening.........\n");
    len=sizeof(client1);
    printf("Accepted......\n\n\n");
    recvfrom(sockfd,tubelight,100,0,(struct sockaddr*)&client1,&len);
    printf("TUBELIGHT=%s",tubelight);
    sendto(sockfd,tubelight,100,0,(struct sockaddr*)&client1,len);
    close(sockfd);
}
   

***************************************CLIENT*********************************


#include<stdio.h>
#include <sys/types.h>         
#include <sys/socket.h>
#include<netinet/in.h>
#include<string.h>
#define SERV_TCP_PORT 5035
int main(int argc,char **argv)
{
    int sockfd,len;
    char tubelight[100];
    struct sockaddr_in server1;
    struct hostent *server;
    sockfd=socket(AF_INET,SOCK_DGRAM,0);
    if(sockfd==-1)
        printf("Error in Creation.....\n");
    server1.sin_family=AF_INET;
    server1.sin_port=htons(SERV_TCP_PORT);
    server1.sin_addr.s_addr=inet_addr("127.0.0.1");
    connect(sockfd,(struct sockaddr*)&server1,sizeof(server1))    ;
    len=sizeof(server1);
    printf("TUBELIGHT:-");
    fgets(tubelight,100,stdin);
    sendto(sockfd,tubelight,100,0,(struct sockaddr*)&server1,len);
    bzero(tubelight,sizeof(tubelight));
    recvfrom(sockfd,tubelight,100,0,(struct sockaddr*)&server1,&len);
    printf("server=%s",tubelight);
    close(sockfd);
}