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https://issues.apache.org/jira/browse/CLOUDSTACK-8506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14557252#comment-14557252
 ] 

ASF GitHub Bot commented on CLOUDSTACK-8506:
--------------------------------------------

Github user wilderrodrigues commented on a diff in the pull request:

    https://github.com/apache/cloudstack/pull/292#discussion_r30943691
  
    --- Diff: utils/src/com/cloud/utils/net/NetUtils.java ---
    @@ -329,35 +329,46 @@ public static String getMacAddress(InetAddress 
address) {
             return sb.toString();
         }
     
    -    public static long getMacAddressAsLong(InetAddress address) {
    +    public static long getMacAddressAsLong(final InetAddress address) {
             long macAddressAsLong = 0;
             try {
    -            NetworkInterface ni = 
NetworkInterface.getByInetAddress(address);
    -            byte[] mac = ni.getHardwareAddress();
    +            final NetworkInterface ni = 
NetworkInterface.getByInetAddress(address);
    +            final byte[] mac = ni.getHardwareAddress();
     
                 for (int i = 0; i < mac.length; i++) {
    -                macAddressAsLong |= ((long)(mac[i] & 0xff) << (mac.length 
- i - 1) * 8);
    +                macAddressAsLong |= (long)(mac[i] & 0xff) << (mac.length - 
i - 1) * 8;
                 }
     
    -        } catch (SocketException e) {
    +        } catch (final SocketException e) {
                 s_logger.error("SocketException when trying to retrieve MAC 
address", e);
             }
     
             return macAddressAsLong;
         }
     
    -    public static boolean ipRangesOverlap(String startIp1, String endIp1, 
String startIp2, String endIp2) {
    -        long startIp1Long = ip2Long(startIp1);
    +    public static boolean ipRangesOverlap(final String startIp1, final 
String endIp1, final String startIp2, final String endIp2) {
    +        final long startIp1Long = ip2Long(startIp1);
             long endIp1Long = startIp1Long;
             if (endIp1 != null) {
                 endIp1Long = ip2Long(endIp1);
             }
    -        long startIp2Long = ip2Long(startIp2);
    +        final long startIp2Long = ip2Long(startIp2);
             long endIp2Long = startIp2Long;
             if (endIp2 != null) {
                 endIp2Long = ip2Long(endIp2);
             }
     
    +        // check if the gatewayip is the part of the ip range being added.
    +        // RFC 3021 - 31-Bit Prefixes on IPv4 Point-to-Point Links
    +        //     GW              Netmask         Stat IP        End IP
    +        // 192.168.24.0 - 255.255.255.254 - 192.168.24.0 - 192.168.24.1
    +        // https://tools.ietf.org/html/rfc3021
    +        // Added by Wilder Rodrigues
    +        final int ip31bitPrefixOffSet = 1;
    +        if (startIp2Long - startIp1Long == startIp2Long - (endIp1Long - 
ip31bitPrefixOffSet)) {
    --- End diff --
    
    Nope, it's not. You should check the configurationImpl and see how the 
checks are done separately
    
    Or then look at the chat last night. The iPOverlaps method doens't check 
cidr, as I said before. It checks that there are only 2 ips in the range
    
    Why that? Because the conditions and all the ConfigurationImpl are doing 
the job in many steps
    
    We can discuss it further on Tuesday.
    
    Sent from my iPhone
    
    On 23 May 2015, at 11:09, Daan Hoogland 
<[email protected]<mailto:[email protected]>> wrote:
    
    
    In 
utils/src/com/cloud/utils/net/NetUtils.java<https://github.com/apache/cloudstack/pull/292#discussion_r30943403>:
    
    >          long endIp2Long = startIp2Long;
    >          if (endIp2 != null) {
    >              endIp2Long = ip2Long(endIp2);
    >          }
    >
    > +        // check if the gatewayip is the part of the ip range being 
added.
    > +        // RFC 3021 - 31-Bit Prefixes on IPv4 Point-to-Point Links
    > +        //     GW              Netmask         Stat IP        End IP
    > +        // 192.168.24.0 - 255.255.255.254 - 192.168.24.0 - 192.168.24.1
    > +        // https://tools.ietf.org/html/rfc3021
    > +        // Added by Wilder Rodrigues
    > +        final int ip31bitPrefixOffSet = 1;
    > +        if (startIp2Long - startIp1Long == startIp2Long - (endIp1Long - 
ip31bitPrefixOffSet)) {
    
    
    for any endIp1Long == startIp1Long +1 this condition is true, no matter 
what startIp2Long is let alone endIp2Long. So is it the intention to check 
(startIp1Long == endIp1Long - ip31bitPrefixOffSet) and return false if it is? 
This comes down to a check if this is indeed a /31 range and makes no sense to 
me.
    
    —
    Reply to this email directly or view it on 
GitHub<https://github.com/apache/cloudstack/pull/292/files#r30943403>.



> Make ACS compliant with the RFC 3021
> ------------------------------------
>
>                 Key: CLOUDSTACK-8506
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-8506
>             Project: CloudStack
>          Issue Type: Improvement
>      Security Level: Public(Anyone can view this level - this is the 
> default.) 
>            Reporter: Wilder Rodrigues
>            Assignee: Wilder Rodrigues
>
> On 21 May 2015, at 10:29, Singh, Devender <[email protected]> wrote:
> Hi Cloudstack Team,
> We had no problems building and using /31 networks on 4.2.0, but after our 
> upgrade to 4.4.2  we are no longer able to add new ones.
> We have a lot of them already in place.  As an example I pasted some output 
> from cloudmonkey on a link that is already established and working.
> Does anyone have a workaround, or can point me in the right direction for a 
> patch?
> (local) > list networks id=e044c442-48f7-4bae-8c5d-530423a249f7
> count = 1
> network:
> id = e044c442-48f7-4bae-8c5d-530423a249f7
> name = VLAN180
> acltype = Domain
> broadcastdomaintype = Vlan
> broadcasturi = vlan://180
> canusefordeploy = False
> cidr = 202.90.43.0/31
> displaynetwork = True
> displaytext = VM-UTILITY-2
> dns1 = 4.2.2.1
> domain = ROOT
> domainid = 8acf0368-e5b1-11e2-b5cf-2ef4cf18a6ae
> gateway = 202.90.43.0
> ispersistent = False
> issystem = False
> netmask = 255.255.255.254
> networkofferingavailability = Optional
> networkofferingconservemode = False
> networkofferingdisplaytext = private-guest1_switch
> networkofferingid = 0b63d457-5f5e-426f-a81e-8797e522eb8c
> networkofferingname = private-guest1_switch
> physicalnetworkid = cf4c2846-2418-4ba4-b307-6a6405860799
> related = e044c442-48f7-4bae-8c5d-530423a249f7
> restartrequired = False
> service:
> specifyipranges = True
> state = Setup
> strechedl2subnet = False
> subdomainaccess = True
> tags:
> traffictype = Guest
> type = Shared
> vlan = 180
> zoneid = 88066cb4-64ab-4c54-83a9-3279a1e030cb
> zonename = UTILITY-ZONE-1



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