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

int main(int args, char ** argv){
	struct sockaddr_in sad;
	sad.sin_port = htons(5141);
	sad.sin_addr.s_addr = INADDR_ANY;
	sad.sin_family = AF_INET;

	int skt = socket(AF_INET, SOCK_STREAM, 0);
	bind(skt, (struct sockaddr *)(&sad), sizeof(struct sockaddr_in));
	listen(skt, 5);
	int client_fd;
	struct sockaddr_in client_addr;
	for(;;){
		socklen_t client_address_length;
		client_fd = accept(skt, (struct sockaddr*)&client_addr, &client_address_length);
		printf("Accepted a connection from %s\n", inet_ntoa(client_addr.sin_addr));
		int numbers[2];
		ssize_t readlen = recv(client_fd, numbers, sizeof(numbers), MSG_WAITALL);
		printf("We read %ld bytes and will add %d and %d\n", readlen, numbers[0], numbers[1]);
		int result = numbers[0] + numbers[1];
		write(client_fd, &result, sizeof(result));
		close(client_fd);
	}
	close(skt);
	return 0;
}