diff options
| author | Joe Robinson <joe@lc8n.com> | 2010-10-27 14:21:09 +0100 |
|---|---|---|
| committer | Joe Robinson <joe@lc8n.com> | 2010-10-27 14:21:09 +0100 |
| commit | 063284837c8c366e5502b1b0264b8eb807b61732 (patch) | |
| tree | fff3a1e1e5afaa671485b9d990704658276627ac /org/apache/commons/net/ntp/NtpUtils.java | |
Basic upload functionality to predifined location, with basic file browser
Diffstat (limited to 'org/apache/commons/net/ntp/NtpUtils.java')
| -rw-r--r-- | org/apache/commons/net/ntp/NtpUtils.java | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/org/apache/commons/net/ntp/NtpUtils.java b/org/apache/commons/net/ntp/NtpUtils.java new file mode 100644 index 0000000..ca1fb41 --- /dev/null +++ b/org/apache/commons/net/ntp/NtpUtils.java @@ -0,0 +1,113 @@ +package org.apache.commons.net.ntp;
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+/***
+ * Common NtpUtils Helper class.
+ *
+ * @author Jason Mathews, MITRE Corp
+ *
+ * @version $Revision: 489397 $ $Date: 2006-12-21 16:28:51 +0000 (Thu, 21 Dec 2006) $
+ */
+public final class NtpUtils {
+
+ /***
+ * Returns 32-bit integer address to IPv4 address string "%d.%d.%d.%d" format.
+ *
+ * @param address the 32-bit address
+ * @return the raw IP address in a string format.
+ */
+ public static String getHostAddress(int address)
+ {
+ return ((address >>> 24) & 0xFF) + "." +
+ ((address >>> 16) & 0xFF) + "." +
+ ((address >>> 8) & 0xFF) + "." +
+ ((address >>> 0) & 0xFF);
+ }
+
+ /***
+ * Returns NTP packet reference identifier as IP address.
+ *
+ * @param packet NTP packet
+ * @return the packet reference id (as IP address) in "%d.%d.%d.%d" format.
+ */
+ public static String getRefAddress(NtpV3Packet packet)
+ {
+ int address = (packet == null) ? 0 : packet.getReferenceId();
+ return getHostAddress(address);
+ }
+
+ /***
+ * Get refId as reference clock string (e.g. GPS, WWV, LCL). If string is
+ * invalid (non-ASCII character) then returns empty string "".
+ * For details refer to the <A HREF="http://www.eecis.udel.edu/~mills/ntp/html/refclock.html#list">Comprehensive
+ * List of Clock Drivers</A>.
+ *
+ * @param message
+ * @return reference clock string if primary NTP server
+ */
+ public static String getReferenceClock(NtpV3Packet message) {
+ if (message == null)
+ return "";
+ int refId = message.getReferenceId();
+ if (refId == 0)
+ return "";
+ StringBuffer buf = new StringBuffer(4);
+ // start at highest-order byte (0x4c434c00 -> LCL)
+ for (int shiftBits = 24; shiftBits >= 0; shiftBits -= 8)
+ {
+ char c = (char) ((refId >>> shiftBits) & 0xff);
+ if (c == 0) break; // 0-terminated ASCII string
+ if (!Character.isLetterOrDigit(c))
+ return "";
+ buf.append(c);
+ }
+ return buf.toString();
+ }
+
+ /***
+ * Return human-readable name of message mode type (RFC 1305).
+ *
+ * @param mode
+ * @return mode name
+ */
+ public static String getModeName(int mode)
+ {
+ switch (mode) {
+ case NtpV3Packet.MODE_RESERVED:
+ return "Reserved";
+ case NtpV3Packet.MODE_SYMMETRIC_ACTIVE:
+ return "Symmetric Active";
+ case NtpV3Packet.MODE_SYMMETRIC_PASSIVE:
+ return "Symmetric Passive";
+ case NtpV3Packet.MODE_CLIENT:
+ return "Client";
+ case NtpV3Packet.MODE_SERVER:
+ return "Server";
+ case NtpV3Packet.MODE_BROADCAST:
+ return "Broadcast";
+ case NtpV3Packet.MODE_CONTROL_MESSAGE:
+ return "Control";
+ case NtpV3Packet.MODE_PRIVATE:
+ return "Private";
+ default:
+ return "Unknown";
+ }
+ }
+
+}
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