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CLOUDSTACK-4622:If a VM from guest network is added to network tier of VPC then IP reservation allows the CIDR to be a superset of Network CIDR for that VPC tier

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Signed-off-by: Jayapal <jayapal@apache.org>
This commit is contained in:
Saksham Srivastava 2013-09-13 14:45:35 +05:30 committed by Jayapal
parent 1a033eddae
commit ab4f095c68
2 changed files with 36 additions and 2 deletions
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23
utils/src/com/cloud/utils/net/NetUtils.java
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@ -837,13 +837,32 @@ public class NetUtils {
}
public static boolean isNetworkAWithinNetworkB(String cidrA, String cidrB) {
// This utility returns true if IP range of cidrA is same or lies completely in cidrB
// Returns true if networkA is same as networkB or networkA is a subset of networkB
Long[] cidrALong = cidrToLong(cidrA);
Long[] cidrBLong = cidrToLong(cidrB);
if (cidrALong == null || cidrBLong == null) {
return false;
}
long shift = 32 - cidrBLong[1];
return ((cidrALong[0] >> shift) == (cidrBLong[0] >> shift));
if (isSameIpRange(cidrA, cidrB)) {
return true;
}
String[] cidrPairFirst = cidrA.split("\\/");
String[] cidrPairSecond = cidrB.split("\\/");
Long networkSizeFirst = Long.valueOf(cidrPairFirst[1]);
Long networkSizeSecond = Long.valueOf(cidrPairSecond[1]);
String ipRangeFirst [] = NetUtils.getIpRangeFromCidr(cidrPairFirst[0], networkSizeFirst);
String ipRangeSecond [] = NetUtils.getIpRangeFromCidr(cidrPairFirst[0], networkSizeSecond);
long startIpFirst = NetUtils.ip2Long(ipRangeFirst[0]);
long endIpFirst = NetUtils.ip2Long(ipRangeFirst[1]);
long startIpSecond = NetUtils.ip2Long(ipRangeSecond[0]);
long endIpSecond = NetUtils.ip2Long(ipRangeSecond[1]);
if((startIpFirst >= startIpSecond) && (endIpFirst <= endIpSecond))
return true;
return false;
}
public static Long[] cidrToLong(String cidr) {

15
utils/test/com/cloud/utils/net/NetUtilsTest.java
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@ -174,4 +174,19 @@ public class NetUtilsTest extends TestCase {
public void testGetLocalIPString() {
assertNotNull(NetUtils.getLocalIPString());
}
public void testSubnet() {
//Test to check if a cidr is a part of another cidr
//Test 2 same cidrs
assertTrue(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/25", "10.1.1.0/25"));
//Tests when cidrA is smaller than cidrB
assertTrue(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/26", "10.1.1.0/25"));
assertTrue(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/25", "10.1.1.0/24"));
assertTrue(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/23", "10.1.1.0/22"));
assertTrue(NetUtils.isNetworkAWithinNetworkB("192.168.0.0/16" , "192.168.0.0/15"));
//Tests when cidrA is larger than cidrB
assertFalse(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/26", "10.1.1.0/27"));
assertFalse(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/24", "10.1.1.0/25"));
assertFalse(NetUtils.isNetworkAWithinNetworkB("10.1.1.0/22", "10.1.1.0/23"));
}
}