Recent changes to support-requests

SCTP protocol support

Mon, 26 Dec 2011 11:31:42 -0000

Protection and reliability above all else. Nowadays, information plays a significant role in my life. In connection with this very appropriate introduction would be implementing the protocol SCTP (Stream Control Transmission Protocol - «transfer protocol with flow control"), a new version. This will provide protection against SYN-flood attacks, the establishment of a safe connection (using a four-handshake), as well as pleasant innovation in the form of the conservation message boundaries, multi-threading, unordered delivery, support for multiple interfaces. Implementation of this protocol allows the network to bring a new level of speed, reliability, security and data transmission capabilities over the network. Because the new protocol was created, taking into account shortcomings of TCP, in view of the network and make full use of their opportunities, and special attention was paid to safety and security.

It is high time to promote, SCTP everywhere! Given the current active movement towards IPv6. + A lot of goodies from this extract is another good protocol SPDY. You can not hinder the development of technologies and the need to push modern protocols to the masses. It remains to convince Microsoft's usefulness and necessity of these protocols and to persuade them to intensive implementation. By the way Firefox is already implementing a protocol support SPDY (expected in version 11), as well as support going into the popular web-server nginx.

Lookup incorrect when contact in initial lookup contacts

Steve J — Fri, 18 Jun 2010 18:54:47 -0000

I used Jmule on 120 nodes over the planet-lab network, and I got a hard time to succeed publishing or searching. the issue I derived was on the lookup implementation, which from what I saw is an iterative lookup:
The 50 first nodes which are being used for the "possibleContact" list will not be tested for closure with the "targetID":

LookupTask.startLookup
106 public void startLookup() {
107 lookupStarted = true;
108 responseTime = System.currentTimeMillis();
109 possibleContacts.addAll(routingTable.getNearestContacts(targetID, initialLookupContacts)); /* these contacts will be rejected at line 157 */
110
111
112 int count = ALPHA;
113 if (count > possibleContacts.size()) count = possibleContacts.size();
114 for (int i = 0; i < count; i++) {
115 KadContact contact = getNearestContact(Utils.XOR(targetID,_jkad_manager.getClientID()), possibleContacts,usedContacts);
116
117 lookupContact(contact);
118 }

LookupTask.processResults
155 for(KadContact contact : results) {
156 if (usedContacts.contains(contact)) continue;
157 if (possibleContacts.contains(contact)) continue; /*here*/
158 if (inToleranceZone(Utils.XOR(contact.getContactID(), _jkad_manager.getClientID()), Utils.XOR(targetID, _jkad_manager.getClientID()), toleranceZone)) {
159
160 alpha.add(contact);
161 }
162 else
163 possibleContacts.add(contact);

I solved it by always looking for the tolerance zone, but as it may add performance issues another method may be to pre-check in the start lookup method.
hope it helps,
aureshy

make private components protected in JKad

Steve J — Sat, 22 May 2010 22:51:20 -0000

I am currently working on a academic project experimenting a new approach for tuning privacy and performance in P2P systems. I am using JKAD as the base for the test software and I can say it's amazingly well written. The only problem is that adding functionality without modifying the JKAD code is really painful.

The problem seems to come from the fact that singleton components are referred in other classes as private, which complicate the use of a derived classes.For example, if I want to use a subclass of kad.Kad, I have either to change KadUDPConnection in the Jar file, or copy the whole source file only because of the unique call Kad.getSingelton().receivePacket(rawPacket) .

If you see the potential issues I am talking about, I can contribute to the project to make the small changes needed to fix it.
Regards, aureshy

Text Version

Mario — Thu, 09 Jul 2009 06:42:27 -0000

Hello, It is possible to have a text version of jmule, or, at least, an interface using charva (textual windowing framework)?

JMule configuration (struts) help needed

Alexan Kahkejian — Sat, 04 Oct 2003 16:07:16 -0000

I compiled and installed jmule with struts GUI on tomcat
4.1.27 but I can't configure it.(always tries to connect
to localhost)

Could you please provide me some info about
preferences.xml , edonkeyservers.xml and other files
that hold configuration info (tag discription)

Thanks in advance
Alexan