From 47fee57312db62d9ea723c1db367042c27e5034c Mon Sep 17 00:00:00 2001 From: Rohit Yadav Date: Wed, 13 Aug 2014 14:54:26 +0200 Subject: [PATCH] CLOUDSTACK-4770: In MacAddress skip macAddress when parsed value is 0x00 In MacAddress class, we start by settig macAddress String as null and go through the output of ifconfig -a and pick the one string that is a valid mac address but is not 0x00 and 0xff. With each loop we set the macAddress to null so that it does not pick the last one if everything fails. Tested on Ubuntu where I had an interface called cloud0 whose mac id was 0x00 and it was skipped to get the next one: $ java -classpath com.cloud.utils.net.MacAddress addr in integer is 5071953436 addr in bytes is 0 1 2e 4f de 1c addr in char is 00:01:2e:4f:de:1c Signed-off-by: Rohit Yadav (cherry picked from commit 3b5aa42c6d87fb7e2573146efb8c7d2d0a4692b3) --- utils/src/com/cloud/utils/net/MacAddress.java | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) diff --git a/utils/src/com/cloud/utils/net/MacAddress.java b/utils/src/com/cloud/utils/net/MacAddress.java index 214ce68cf16..dc53e4a60e7 100755 --- a/utils/src/com/cloud/utils/net/MacAddress.java +++ b/utils/src/com/cloud/utils/net/MacAddress.java @@ -19,6 +19,8 @@ package com.cloud.utils.net; +import com.cloud.utils.NumbersUtil; + import java.io.BufferedReader; import java.io.File; import java.io.IOException; @@ -27,8 +29,6 @@ import java.net.InetAddress; import java.net.UnknownHostException; import java.util.Formatter; -import com.cloud.utils.NumbersUtil; - /** * copied from the public domain utility from John Burkard. * @author Johann Burkard @@ -114,8 +114,12 @@ public class MacAddress { String l = null; while ((l = in.readLine()) != null) { macAddress = MacAddress.parse(l); - if (macAddress != null && MacAddress.parseShort(macAddress) != 0xff) - break; + if (macAddress != null) { + short parsedShortMacAddress = MacAddress.parseShort(macAddress); + if (parsedShortMacAddress != 0xff && parsedShortMacAddress != 0x00) + break; + } + macAddress = null; } }