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CID-1116482 cidrToLong cleanup of bitshift problem

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and some trivial testing
This commit is contained in:
Daan Hoogland 2015-11-10 16:18:52 +01:00
parent f9d5c6918c
commit 3ae4dd06f3
2 changed files with 55 additions and 18 deletions
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43
utils/src/main/java/com/cloud/utils/net/NetUtils.java
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@ -870,31 +870,44 @@ public class NetUtils {
public static Long[] cidrToLong(final String cidr) {
if (cidr == null || cidr.isEmpty()) {
return null;
throw new CloudRuntimeException("empty cidr can not be converted to longs");
}
final String[] cidrPair = cidr.split("\\/");
if (cidrPair.length != 2) {
return null;
throw new CloudRuntimeException("cidr is not formatted correctly: "+ cidr);
}
final String cidrAddress = cidrPair[0];
final String cidrSize = cidrPair[1];
if (!isValidIp(cidrAddress)) {
return null;
throw new CloudRuntimeException("cidr is not bvalid in ip space" + cidr);
}
int cidrSizeNum = -1;
try {
cidrSizeNum = Integer.parseInt(cidrSize);
} catch (final Exception e) {
return null;
}
final long numericNetmask = 0xffffffff >> MAX_CIDR - cidrSizeNum << MAX_CIDR - cidrSizeNum;
long cidrSizeNum = getCidrSizeFromString(cidrSize);
final long numericNetmask = (long)0xffffffff >> MAX_CIDR - cidrSizeNum << MAX_CIDR - cidrSizeNum;
final long ipAddr = ip2Long(cidrAddress);
final Long[] cidrlong = {ipAddr & numericNetmask, (long)cidrSizeNum};
return cidrlong;
}
/**
* @param cidrSize
* @return
* @throws CloudRuntimeException
*/
static long getCidrSizeFromString(final String cidrSize) throws CloudRuntimeException {
long cidrSizeNum = -1;
try {
cidrSizeNum = Integer.parseInt(cidrSize);
} catch (final NumberFormatException e) {
throw new CloudRuntimeException("cidrsize is not a valid int: " + cidrSize, e);
}
if(cidrSizeNum > 32 || cidrSizeNum < 0) {// assuming IPv4
throw new CloudRuntimeException("cidr size out of range: " + cidrSizeNum);
}
return cidrSizeNum;
}
public static String getCidrSubNet(final String cidr) {
if (cidr == null || cidr.isEmpty()) {
return null;
@ -908,13 +921,7 @@ public class NetUtils {
if (!isValidIp(cidrAddress)) {
return null;
}
long cidrSizeNum = -1;
try {
cidrSizeNum = Integer.parseInt(cidrSize);
} catch (final NumberFormatException e) {
throw new CloudRuntimeException("cidrsize is not valid", e);
}
long cidrSizeNum = getCidrSizeFromString(cidrSize);
final long numericNetmask = (long)0xffffffff >> MAX_CIDR - cidrSizeNum << MAX_CIDR - cidrSizeNum;
final String netmask = NetUtils.long2Ip(numericNetmask);
return getSubNet(cidrAddress, netmask);

30
utils/src/test/java/com/cloud/utils/net/NetUtilsTest.java
View File

@ -38,6 +38,7 @@ import java.util.TreeSet;
import org.apache.log4j.Logger;
import org.junit.Test;
import com.cloud.utils.exception.CloudRuntimeException;
import com.googlecode.ipv6.IPv6Address;
public class NetUtilsTest {
@ -439,4 +440,33 @@ public class NetUtilsTest {
String subnet = NetUtils.getCidrSubNet("10.10.10.10", 16);
assertTrue(cidr + " does not contain " + subnet,NetUtils.isIpWithtInCidrRange(subnet, cidr));
}
@Test
public void testIsValidCidrSize() {
final String cidrsize = "16";
long netbits = NetUtils.getCidrSizeFromString(cidrsize);
assertTrue(" does not compute " + cidrsize,netbits == 16);
}
@Test(expected=CloudRuntimeException.class)
public void testIsInvalidCidrSize() {
final String cidrsize = "33";
long netbits = NetUtils.getCidrSizeFromString(cidrsize);
assertTrue(" does not compute " + cidrsize,netbits == 16);
}
@Test(expected=CloudRuntimeException.class)
public void testIsInvalidCidrString() {
final String cidrsize = "ggg";
long netbits = NetUtils.getCidrSizeFromString(cidrsize);
assertTrue(" does not compute " + cidrsize,netbits == 16);
}
@Test
public void testCidrToLongArray() {
final String cidr = "10.192.10.10/10";
Long[] netbits = NetUtils.cidrToLong(cidr);
assertEquals("unexpected cidrsize " + netbits[1],10l, netbits[1].longValue());
assertEquals("(un)expected <" + 0x0ac00000L + "> netaddress " + netbits[0].longValue(),netbits[0].longValue(),0x0ac00000l);
}
}