gistfile1.c

void TestReceives(CuTest *tc) {
	struct sockaddr_in serv_port, cli_port, dest, from;
	int server, client;
	char recv_buffer[255];
	int sent_bytes, received_bytes;
	socklen_t from_size;

	server = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (server <= 0) { fprintf(stderr, "no server\n"); exit(1); }
	serv_port.sin_family = AF_INET;
	serv_port.sin_addr.s_addr = INADDR_ANY;
	serv_port.sin_port = htons((unsigned short) SERVER_PORT);
	if (bind(server, (struct sockaddr*)&serv_port, sizeof(serv_port)) < 0) { fprintf(stderr, "no server bind\n"); exit(1); }
	if (fcntl(server, F_SETFL, O_NONBLOCK, 1) == -1) { fprintf(stderr, "no server nonblock\n"); exit(1); }

	client = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
	if (client <= 0) { fprintf(stderr, "no client\n"); exit(1); }
	cli_port.sin_family = AF_INET;
	cli_port.sin_addr.s_addr = INADDR_ANY;
	cli_port.sin_port = htons((unsigned short) CLIENT_PORT);
	if (bind(client, (struct sockaddr*)&cli_port, sizeof(cli_port)) < 0) { fprintf(stderr, "no client bind\n"); exit(1); }
	if (fcntl(client, F_SETFL, O_NONBLOCK, 1) == -1) { fprintf(stderr, "no client nonblock\n"); exit(1); }

	dest.sin_family = AF_INET;
	dest.sin_port = htons((unsigned short) SERVER_PORT);
	inet_aton("127.0.0.1", &dest.sin_addr);
	//dest.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
	//dest.sin_addr.s_addr = (1 << 24) | (0 << 16) | (0 << 8) | 127;

	sent_bytes = sendto(client, "test", sizeof(char) * 5, 0, (struct sockaddr*)&dest, sizeof(dest));
	received_bytes = recvfrom(server, recv_buffer, sizeof(char) * 5, 0, (struct sockaddr*)&from, &from_size); 

	CuAssertIntEquals(tc, sizeof(char) * 5, sent_bytes);
	CuAssertIntEquals(tc, sizeof(char) * 5, received_bytes);
	CuAssertStrEquals(tc, "test", recv_buffer);
}