/* Connect to loopback address port 65535, unconnect, shutdown for reading, and
   then test receiving a datagram. */

#include "udp.h"

int main(void)
{
	signal(SIGPIPE, sigpipe);
	int fd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if ( fd < 0 )
		err(1, "socket");
	struct sockaddr_in sin;
	memset(&sin, 0, sizeof(sin));
	sin.sin_family = AF_INET;
	sin.sin_addr.s_addr = htobe32(INADDR_LOOPBACK);
	sin.sin_port = htobe16(65535);
	if ( connect(fd, (const struct sockaddr*) &sin, sizeof(sin)) < 0 )
		err(1, "first connect");
	struct sockaddr cos;
	memset(&cos, 0, sizeof(cos));
	cos.sa_family = AF_UNSPEC;
	if ( connect(fd, (const struct sockaddr*) &cos, sizeof(cos)) < 0 )
		err(1, "second connect");
	if ( shutdown(fd, SHUT_RD) )
		err(1, "shutdown");
	char x;
	ssize_t amount = recv(fd, &x, sizeof(x), MSG_DONTWAIT);
	if ( amount < 0 )
		err(1, "recv");
	else if ( amount == 0 )
		puts("EOF");
	return 0;
}