client.c

#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<stdlib.h>
#include<stdio.h>
#define MAX 80
#define PORT 43454
#define SA struct sockaddr
int main()
{
    char buff[MAX];
    int sockfd,len,n;
    struct sockaddr_in servaddr;
    sockfd=socket(AF_INET,SOCK_DGRAM,0);
    if(sockfd==-1)
    {
        printf("socket creation failed...\n");
        exit(0);
    }
    else
    printf("Socket successfully created..\n");
    bzero(&servaddr,sizeof(len));
    servaddr.sin_family=AF_INET;
    servaddr.sin_addr.s_addr=inet_addr("127.0.0.1");
    servaddr.sin_port=htons(PORT);
    len=sizeof(servaddr);
    for(;;)
    {
        printf("\nEnter string : ");
        n=0;
        while((buff[n++]=getchar())!='\n');
        sendto(sockfd,buff,sizeof(buff),0,(SA *)&servaddr,len);
        bzero(buff,sizeof(buff));
        recvfrom(sockfd,buff,sizeof(buff),0,(SA *)&servaddr,&len);
        printf("From Server : %s\n",buff);
        if(strncmp("exit",buff,4)==0)
        {
            printf("Client Exit...\n");
            break;
        }
    }
            close(sockfd);
}