#include<unistd.h>
#include<sys/socket.h>
#include<netinet/ip.h>
#include<netinet/in.h>
#include<arpa/inet.h>
#include<stdio.h>

uint32_t secret_number = 42;

int main(){
	int fd = socket(AF_INET, SOCK_STREAM, 0);
	struct sockaddr_in address;
	address.sin_family = AF_INET; // ip version 4
	address.sin_port = htons(5130);
	address.sin_addr.s_addr = 0x0;
	
	bind(fd, (struct sockaddr*)&address, sizeof(address));
	listen(fd, 5);
	for(;;){
		int client_fd = accept(fd, 0, 0);
		char name[16];
		uint32_t guess;
		read(client_fd, name, 16);
		read(client_fd, &guess, 4);
		uint8_t points = 0;
		if(guess == secret_number)
			points = 2;
		else if(guess % secret_number == 0)
			points = 1;
		write(client_fd, &points, 1);
		close(client_fd);
		printf("Client %s scored %u points\n", name, points);
	}
	return 0;
}