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

struct packet {
    char oper[5];
    int int1;
    int int2;
};

struct resultpacket {
    int success;
    int result;
};

// Driver code
int main() {
	int sockfd;
	char buffer[10];
	char *hello = "Hello from server";
	struct sockaddr_in servaddr, cliaddr;

	// Creating socket file descriptor
	if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
		perror("socket creation failed");
		exit(EXIT_FAILURE);
	}

	memset(&servaddr, 0, sizeof(servaddr));
	memset(&cliaddr, 0, sizeof(cliaddr));

	// Filling server information
	servaddr.sin_family = AF_INET; // IPv4
	servaddr.sin_addr.s_addr = INADDR_ANY;
	servaddr.sin_port = htons(8080);

	// Bind the socket with the server address
	if ( bind(sockfd, (const struct sockaddr *)&servaddr,
			sizeof(servaddr)) < 0 )
	{
		perror("bind failed");
		exit(EXIT_FAILURE);
	}

	int len, n;
	n = recvfrom(sockfd, (char *)buffer, 10,
				MSG_WAITALL, ( struct sockaddr *) &cliaddr,
				&len);
	buffer[n] = '\0';
	printf("Client : %s\n", buffer);
	sendto(sockfd, (const char *)hello, strlen(hello),
		MSG_CONFIRM, (const struct sockaddr *) &cliaddr,
			len);
	printf("Hello message sent.\n");

	return 0;
}