#include <mes2.h>

int main() {
	int	sk, size, port;
	char	data[32];
	struct sockaddr myaddr, recv;

	port = 2000;
	if(argc == 2) sscanf(argv[1], "%d", &port);
	sk = udp_socket();
	if(sk == -1) {
		printf("open failed.\r");
		return 0;
	}
	myaddr.sin_port = port;
	myaddr.sin_addr = 0;
	udp_bind(sk, &myaddr);
	for(;;) {
		size = recvfrom(sk, data, 32, &recv);
		if(size > 0) {
			if(data[0] == 'q') break;
			sendto(sk, data, size, &recv);
		}
	}
	udp_free(sk);
}