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

#define PORT 5842
#define MAXDATASIZE 16

int main(int argc, char *argv[])
{
    int sockfd, numbytes;  
    char buf[200];
    struct hostent *he;
    struct sockaddr_in their_addr; // connector's address information 

    if (argc != 2) {
        fprintf(stderr,"usage: client hostname\n");
        exit(1);
    }

    if ((he=gethostbyname(argv[1])) == NULL) {  // get the host info 
        herror("gethostbyname");
        exit(1);
    }

    if ((sockfd = socket(PF_INET, SOCK_STREAM, 0)) == -1) {
        perror("socket");
        exit(1);
    }

    their_addr.sin_family = AF_INET;    // host byte order 
    their_addr.sin_port = htons(PORT);  // short, network byte order 
    their_addr.sin_addr = *((struct in_addr *)he->h_addr);
    memset(their_addr.sin_zero, '\0', sizeof their_addr.sin_zero);

    if (connect(sockfd, (struct sockaddr *)&their_addr, sizeof(struct sockaddr)) == -1) {
        perror("connect");
        exit(1);
    }
	
	unsigned int value[4];
	int i;
	unsigned long long result = 0;
	
	for(i = 0; i<4; i++) {
		if ((numbytes=recv(sockfd, buf, 4, 0)) != -1) {
			value[i] = (unsigned int) *buf;
			result += (unsigned int) value[i];
			printf("Value %d: %u\n", i, value[i]);
		}
	}
	
    
    printf("Total: %llu\n", result);
	
		if ((numbytes=send(sockfd, &result, 8, 0)) == 8) {
			printf("\nSent reply... lets get response\n");
			for(i = 0;i<200;i++) {
				if(recv(sockfd, buf, 1, 0) == 1) {
				printf("%c", buf[0]);
			}
		}
	}
	    	
    close(sockfd);

    return 0;
}