| Methods Summary |
|---|
| public static synchronized int | getNextPort()
if (!failedOnce) {
try {
ServerSocket ss = new ServerSocket(0);
int port = ss.getLocalPort();
ss.close();
return port;
} catch (Exception ex) {
failedOnce = true;
}
}
return getNextPort_unsafe();
|
| public static synchronized int | getNextPortForUDP()Returns 1 free ports to be used.
return getNextPortsForUDP(1)[0];
|
| public static synchronized int | getNextPort_unsafe()
if (++lastAssignedPort > 65534) {
lastAssignedPort = 6000;
}
return lastAssignedPort;
|
| public static synchronized int[] | getNextPortsForUDP(int num)Returns the specified number of free ports to be used.
if (num <= 0) {
throw new IllegalArgumentException("Invalid ports number: " + num);
}
DatagramSocket[] dss = new DatagramSocket[num];
int[] ports = new int[num];
try {
for (int i = 0; i < num; ++i) {
dss[i] = new DatagramSocket(0);
ports[i] = dss[i].getLocalPort();
}
} catch (Exception ex) {
throw new Error("Unable to get " + num + " ports for UDP: " + ex);
} finally {
for (int i = 0; i < num; ++i) {
if (dss[i] != null) {
dss[i].close();
}
}
}
return ports;
|
| private static int | somewhatRandomPort()
Calendar c = Calendar.getInstance(TimeZone.getTimeZone("UTC"));
int minutes = c.get(Calendar.MINUTE);
int seconds = c.get(Calendar.SECOND);
return 6000 + (1000 * minutes) + ((seconds / 6) * 100);
|
