Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
You might want to take a look at the Script NS Simulator for Beginners bei Eitan Altman and Tania Jimenez at http://www-sop.inria.fr/mistral/personnel/Eitan.Altman/COURS-NS/n3.pdf for a User's Guide. If you want to spend time on improving documentation I think this is where you should start. greetings, Martina Umlauft Ahmad Khayyat schrieb: A design decision like this can be accepted if it was supported by proper documentation, which is absolutely not the case for ns-2. IMHO, the biggest problem of ns-2 is lack of proper documentation. At least, there has to be two documents: a user's guide, and a developer's guide. ns manual is, again, a mixture of both that, in its current state, does not serve the purpose of any! I understand it is a work-in-progress, but it doesn't have a consistent format for different sections. The level of detail ranges across a wide spectrum in various sections. A user's guide has to worry about writing oTcl simulation scripts that only uses the simulator to run simulation scenarios. At least half of the problems discussed in the list can be avoided by having such a document. A developer's guide should present the simulator's architecture, and describe the design of individual modules. Moreover, it should clarify how to go about implementing new modules for every layer in the networking stack. The maintainers' requirements for including new modules in the distribution is a good move, if they were met more often! I'm very much interested in producing a more accessible documentation suite for ns-2. Such a great tool has much greater potential than it is credited for, only if it had proper documentation. To take a positive action, I'm willing to spend some time helping the dream of good ns-2 documentation happen. If anyone else is interested, please let's do something about it. PS. the #ns-2 IRC channel on irc.freenode.net could be a good place for such discussions! Regards, - Ahmad Khayyat Bo Wang wrote: Hi, IMHO, the mixture of C++ and oTcl is the most annoying feature of NS which makes it really hard to understand the code. Best, Bo Wang On 5/31/06, Ahmad Khayyat [EMAIL PROTECTED] wrote: Just a tiny hint.. When you trace the code, don't forget that ns-2 is a mixture of C++ and oTcl. Much of the object passing is done through oTcl. Faisal Siddiqui wrote: Hi Paul, Thanks for the link. I totally agree with you. I have spent so much time trying to understand as to how does the simulation flows through the source code, but can't really make any headways anymore. I am trying to implement a new control flow mechanism where no packet are dropped, but in order to do so I have read the queue size of the next hop so that the current node can decide whether to accept any more packets from other nodes or flag its exception indicatiing to all other nodes feeding into it to stop sending more packets to it. I am really stuck right now because I can't locate where in the source code does the current node find its next hop address and how does it find that out. I have bunch of more questions like how does the node and agents are located to each other because nodes don't store any information regarding agents or classifiers within them and vice-versa. I am still waiting if someone could lend some insight into it. Please let me know if you have any comments or if you find any help. Thanks, - Faisal On 5/21/06, Paul Vincent Craven [EMAIL PROTECTED] wrote: The proper link is: http://www.grid.unina.it/~vollero/resources/doc_ns2.27/html/index.html But the documentation there is limited at best. I'm in the same boat as you. I've spent a very long time trying to understand the passing of events around, how to switch between classifiers, etc. I'd love to find someone who really knows NS2 and hire them as a consultant for a few hours just to answer all my questions! Paul Vincent Craven [EMAIL PROTECTED]
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
Just a tiny hint.. When you trace the code, don't forget that ns-2 is a mixture of C++ and oTcl. Much of the object passing is done through oTcl. Faisal Siddiqui wrote: Hi Paul, Thanks for the link. I totally agree with you. I have spent so much time trying to understand as to how does the simulation flows through the source code, but can't really make any headways anymore. I am trying to implement a new control flow mechanism where no packet are dropped, but in order to do so I have read the queue size of the next hop so that the current node can decide whether to accept any more packets from other nodes or flag its exception indicatiing to all other nodes feeding into it to stop sending more packets to it. I am really stuck right now because I can't locate where in the source code does the current node find its next hop address and how does it find that out. I have bunch of more questions like how does the node and agents are located to each other because nodes don't store any information regarding agents or classifiers within them and vice-versa. I am still waiting if someone could lend some insight into it. Please let me know if you have any comments or if you find any help. Thanks, - Faisal On 5/21/06, Paul Vincent Craven [EMAIL PROTECTED] wrote: The proper link is: http://www.grid.unina.it/~vollero/resources/doc_ns2.27/html/index.html But the documentation there is limited at best. I'm in the same boat as you. I've spent a very long time trying to understand the passing of events around, how to switch between classifiers, etc. I'd love to find someone who really knows NS2 and hire them as a consultant for a few hours just to answer all my questions! Paul Vincent Craven [EMAIL PROTECTED]
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
Hi, IMHO, the mixture of C++ and oTcl is the most annoying feature of NS which makes it really hard to understand the code. Best, Bo Wang On 5/31/06, Ahmad Khayyat [EMAIL PROTECTED] wrote: Just a tiny hint.. When you trace the code, don't forget that ns-2 is a mixture of C++ and oTcl. Much of the object passing is done through oTcl. Faisal Siddiqui wrote: Hi Paul, Thanks for the link. I totally agree with you. I have spent so much time trying to understand as to how does the simulation flows through the source code, but can't really make any headways anymore. I am trying to implement a new control flow mechanism where no packet are dropped, but in order to do so I have read the queue size of the next hop so that the current node can decide whether to accept any more packets from other nodes or flag its exception indicatiing to all other nodes feeding into it to stop sending more packets to it. I am really stuck right now because I can't locate where in the source code does the current node find its next hop address and how does it find that out. I have bunch of more questions like how does the node and agents are located to each other because nodes don't store any information regarding agents or classifiers within them and vice-versa. I am still waiting if someone could lend some insight into it. Please let me know if you have any comments or if you find any help. Thanks, - Faisal On 5/21/06, Paul Vincent Craven [EMAIL PROTECTED] wrote: The proper link is: http://www.grid.unina.it/~vollero/resources/doc_ns2.27/html/index.html But the documentation there is limited at best. I'm in the same boat as you. I've spent a very long time trying to understand the passing of events around, how to switch between classifiers, etc. I'd love to find someone who really knows NS2 and hire them as a consultant for a few hours just to answer all my questions! Paul Vincent Craven [EMAIL PROTECTED]
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
Hi, snip On Monday 22 May 2006 14:25, Paul Vincent Craven wrote: As for routing, I'd recommend finding the article Implementing MANET Routing Protocols in ns2 http://ants.dif.um.es/masimum/nsrt-howto/html/nsrt-howto.html. I think the site it used to be at is gone. You might need to search around the web some to find it. snip Sorry for the off-topic, but I'd like to clarify this. The URL changed some time ago, now you can find the tutorial in http://masimum.inf.um.es/?Documents Please note that the domain name has changed from dif to inf. Until December, you can use http://masimum.dif.um.es/, but it will be no longer available when 2007 arrives. So, use http://masimum.inf.um.es/ instead. Best regards, fran
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
dear faisal, you can check out this link http://www.grid.unina it/~vollero/resources/doc_ns2.27/html/index.html for ns2 source code documentation. regards Mahmudul Haque Azad Undergraduate Student Department of Computer Science Engineering Bangladesh University of Engineering Technology http://www.mhazad.tk +880 191 622 735 ---Original Message--- From: Faisal Siddiqui Date: 05/20/06 11:32:35 To: ns-users Subject: [ns] Does anyone in this forum has detailed knowledge about the NS2source code? Hi, I am really curious to know if anybody in this forum has detailed knowledge about the network simulator source code. I have a lot of questions and I have tried posting it here but haven't received any responses with people who are the architects of the source code. I really want to know once the node is created through node.cc, is that node referenced anywhere else in the source code? I tried to step through each step of the source code and could not find any reference to it. In the document, it says that classifiers are associated with each node. Is there any ways of accessing these classifier from the node itelf? I mean from the static node list created from node.cc. Is it possible to access queues associated with each classifier (link)? The variable target_ is used all over the source code without providing any satisfactory explanation for its usage in various places. What does target_ really means? Does it means the next hop node for the packet? If thats the case then why it's address doesn't match with the address of one of the nodes from the static node list created initially from node.cc? If someone here knows the inside out of the simulator, please comment on the above questions. Thanks, - Faisal
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
Hi, I can't open the page because it reports it can't find the server. Could you possibly check the link. Thanks in advance. - Faisal On 5/21/06, Mahmudul Haque Azad [EMAIL PROTECTED] wrote: dear faisal, you can check out this link http://www.grid.unina it/~vollero/resources/doc_ns2.27/html/index.html for ns2 source code documentation. regards Mahmudul Haque Azad Undergraduate Student Department of Computer Science Engineering Bangladesh University of Engineering Technology http://www.mhazad.tk +880 191 622 735 ---Original Message--- From: Faisal Siddiqui Date: 05/20/06 11:32:35 To: ns-users Subject: [ns] Does anyone in this forum has detailed knowledge about the NS2source code? Hi, I am really curious to know if anybody in this forum has detailed knowledge about the network simulator source code. I have a lot of questions and I have tried posting it here but haven't received any responses with people who are the architects of the source code. I really want to know once the node is created through node.cc, is that node referenced anywhere else in the source code? I tried to step through each step of the source code and could not find any reference to it. In the document, it says that classifiers are associated with each node. Is there any ways of accessing these classifier from the node itelf? I mean from the static node list created from node.cc. Is it possible to access queues associated with each classifier (link)? The variable target_ is used all over the source code without providing any satisfactory explanation for its usage in various places. What does target_ really means? Does it means the next hop node for the packet? If thats the case then why it's address doesn't match with the address of one of the nodes from the static node list created initially from node.cc? If someone here knows the inside out of the simulator, please comment on the above questions. Thanks, - Faisal
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
The proper link is: http://www.grid.unina.it/~vollero/resources/doc_ns2.27/html/index.html But the documentation there is limited at best. I'm in the same boat as you. I've spent a very long time trying to understand the passing of events around, how to switch between classifiers, etc. I'd love to find someone who really knows NS2 and hire them as a consultant for a few hours just to answer all my questions! Paul Vincent Craven [EMAIL PROTECTED]
Re: [ns] Does anyone in this forum has detailed knowledge about the NS2source code?
Hi Paul, Thanks for the link. I totally agree with you. I have spent so much time trying to understand as to how does the simulation flows through the source code, but can't really make any headways anymore. I am trying to implement a new control flow mechanism where no packet are dropped, but in order to do so I have read the queue size of the next hop so that the current node can decide whether to accept any more packets from other nodes or flag its exception indicatiing to all other nodes feeding into it to stop sending more packets to it. I am really stuck right now because I can't locate where in the source code does the current node find its next hop address and how does it find that out. I have bunch of more questions like how does the node and agents are located to each other because nodes don't store any information regarding agents or classifiers within them and vice-versa. I am still waiting if someone could lend some insight into it. Please let me know if you have any comments or if you find any help. Thanks, - Faisal On 5/21/06, Paul Vincent Craven [EMAIL PROTECTED] wrote: The proper link is: http://www.grid.unina.it/~vollero/resources/doc_ns2.27/html/index.html But the documentation there is limited at best. I'm in the same boat as you. I've spent a very long time trying to understand the passing of events around, how to switch between classifiers, etc. I'd love to find someone who really knows NS2 and hire them as a consultant for a few hours just to answer all my questions! Paul Vincent Craven [EMAIL PROTECTED]
