[ns] problem with prev_hop_
Hi All, The field prev_hop_ of struct hdr_cmn in ns/common/packet.h should have the value of the forwarding node. Unfortunately, this always shows 0. Please help me in getting the actual forwarding node. (This query has been posted several times by different individuals. I am not able to get any solution in the internet.) Thanks in advance. amar
Re: [ns] Regarding Re-compile error
Dear Gopi. The compiler error did told you what to do. You need to run configure. Any changes in Makefile would require fresh configure. rgds Saravanan K On Sun, Feb 3, 2013 at 6:40 AM, Gopi gopi_...@yahoo.co.in wrote: Dear ns-users, i am getting the following error while re-compiling, after modifications in makefile.in... Makefile.in is newer than Makefile. You need to re-run configure. false make: *** [Makefile] Error 1 can anyone help me to fix the error... Regards, T.Gopi.
[ns] Last Mile: ICIMP 2013 || June 23 - 28, 2013 - Rome, Italy
INVITATION: = Please consider to contribute to and/or forward to the appropriate groups the following opportunity to submit and publish original scientific results to ICIMP 2013. The submission deadline is February 13, 2013. Authors of selected papers will be invited to submit extended article versions to one of the IARIA Journals: http://www.iariajournals.org = == ICIMP 2013 | Call for Papers === CALL FOR PAPERS, TUTORIALS, PANELS ICIMP 2013, The Eighth International Conference on Internet Monitoring and Protection June 23 - 28, 2013 - Rome, Italy General page: http://www.iaria.org/conferences2013/ICIMP13.html Call for Papers: http://www.iaria.org/conferences2013/CfPICIMP13.html - regular papers - short papers (work in progress) - posters Submission page: http://www.iaria.org/conferences2013/SubmitICIMP13.html Submission deadline: February 13, 2013 Sponsored by IARIA, www.iaria.org Extended versions of selected papers will be published in IARIA Journals: http://www.iariajournals.org Print proceedings will be available via Curran Associates, Inc.: http://www.proceedings.com/9769.html Articles will be archived in the free access ThinkMind Digital Library: http://www.thinkmind.org Please note the Poster and Work in Progress options. The topics suggested by the conference can be discussed in term of concepts, state of the art, research, standards, implementations, running experiments, applications, and industrial case studies. Authors are invited to submit complete unpublished papers, which are not under review in any other conference or journal in the following, but not limited to, topic areas. All tracks are open to both research and industry contributions, in terms of Regular papers, Posters, Work in progress, Technical/marketing/business presentations, Demos, Tutorials, and Panels. Before submission, please check and conform with the Editorial rules: http://www.iaria.org/editorialrules.html ICIMP 2013 Topics (topics and submission details: see CfP on the site) TRASI: Internet traffic surveillance and interception Methods and context to classify legal and illegal traffic; Methods and procedure to classify wanted and undesired traffic; Overloads, attacks, and failures; Detection of attacks via protocols and applications; Undesired traffic evaluation; Traffic identification caused by malicious code (spam, virii, and worms, etc.); Traffic profile during disaster recovery; Traffic during active emergency services; Early warning on growing undesired traffic; Access control and audit detection points; Denial of service; Spoofing; Lawful interception; Multi-modal undesired traffic detection; Measurements and data mining correlation; Countermeasures on undesired traffic IPERF: Internet performance Performance-oriented design; Active and passive performance monitoring; Performance metrics and measurements; Measurement-based performance evaluation in Internet; System measurement and monitoring; Performance model verification and validation; Stochastic modeling (queues, Petri nets, etc.); Statistical performance; Performance of Internet routing; Performance optimization; Internet performance prediction; Internet performance evaluation studies; Internet performance testbeds; Performance evaluation of Web search engines; Performance evaluation of P2P systems RTSEC: Security for Internet-based real-time systems Security and availability of Web Services; Security/Performance trade-off; Distributed systems security; Language-based security; Formalisms for security and protocol verification; Performance on firewall protected real-time systems; Security management in real-time systems; Metrics and techniques for security risk assessment; Internet monitoring and response security service; Protecting emergency communications from misuse and exploitation; Maintaining security in the face of disaster; Intrusion prevention and detection systems; Secure networks from web-based threats DISAS: Disaster prevention and recovery Survivable networks on chips; Intrusion detection and defense; Alerting systems based on outstanding network events; Recovery methods in various networks; Disaster diagnosis and continuity plans; Fighting mechanisms for disaster of networks and applications; Global positioning systems; Vehicle localization and navigation systems; Disaster relief agencies to perform recovery operations; Survivability-driven defense and do-it-yourself disaster recovery; Security during disaster recovery; Budgeting disaster recovery; Networks emergency services; Reliable emergency communications and applications; Response to the networks emergency services; Disaster prevention and recovery; Fighting mechanisms for disaster of networks and applications; Networks resiliency methods; Recovery in various networks; Theory on robust networks; Customer protection and serviceability
Re: [ns] Code for editing packet header
Magdy,
I have not worked adding a new field in packet header in IP layer.
Nevertheless, just throwing some thoughts,
1. Have you included int tag_; in your Agent.h?
2. In MAC layer we have to mention the size of new field, one of the
purpose is, it could be factored in for the transmission time over
physical layer considering longer packet size now.Do see if the same
needed to be done for IP packet.
Good Luck.
rgds
Saravanan K
On Sat, Feb 2, 2013 at 9:18 PM, Magdy Fares mfare...@yahoo.com wrote:
How are you Sir,
In my project i need the code to do the following:
While the packet passes through the nodes in the path from the sender to the
receiver, each node has a unique id consists of for example 3 or 4 bits, and
there is a field of 16 bits in each packet header that holds the node id
after XORing it with the old value.
I acctually did the following:
1- In the structure hdr_ip in the file ip.h , i added a variable of type int
named tag_ to hold the node's id after doing XOR with the old values as i
said befor.
2- And also in the same place i added an access function lkie this int
tag() {return tag_;}
3- In the file ip.cc, in the function export_offsets() , i added this line
field_offset(tag_, OFFSET(hdr_ip, tag_));
I think, by these above three steps i added a new field in the packet headers
that carry the nodes id after doing XOR between old and new values.
In the file agent.cc, and in the function Agent::initpkt() , i added these
two lines:
iph-tag() = 3;
printf(\n This packet has a tag of %d, iph-tag_);
I think these two lines are used for debugging.
So, if these steps are correcet, is there any one can help me to build on
them to finish my task, please i need your help Urgently
Thank you friends,
Eng. Magdy Fadel
From: Magdy Fares mfare...@yahoo.com
To: ns-users@isi.edu ns-users@isi.edu
Sent: Saturday, February 2, 2013 12:14 AM
Subject: Code for editing packet header
To NS-Users,
I am a Ph.D. student of and part of my project trys to XOR some
data in the packet header while it travrses from the source to the
destination. So i *urgently* need code to accomplish this point please.
So, Any One have code for this plz forward it **Urgently.**
Thanks and regards,
Magdy
Fadel
Re: [ns] Regarding Routing
Gopi, Have you tried to google? Much information is there, just need to spend some time doing research. 1. For single hop network you dont need routing. You may use dumbagent. 2. There are some implementation for static routing in the web, some uses DSR as base and some created their own way for filling the routing table. Check out for NOAH or FixRT. Good luck. rgds Saravanan K On Wed, Jan 30, 2013 at 5:59 AM, gopi gopi_...@yahoo.co.in wrote: Dear ns users, can anyone tell me, how to add static routing for wireless network... Regards, T.Gopi.
Re: [ns] how to access the variables in .cc files?
Dear Shiny, This is a more of a programming question rather than NS2. Perhaps you can check with other programming related forums. In the programming point of view for sure it can be done but you have to check if it is logically sound from simulator or real life implementation point of view. Assume you like to read a content of source node address of an ACK packet from MAC layer (mac-802.11.cc) at Physical Layer (wireless-phy.cc), since current frame format of ACK does not carry that information, you may create a new field to carry this information for you. So when you read it at physical layer, your are not only reading the variables from two different files, but also logically sound, as you are reading the packet content which flows from MAC to Physical layer when it flows out from destination (Data) node. Good Luck. rgds Saravanan K On Wed, Jan 30, 2013 at 4:29 AM, shiny shiny@gmail.com wrote: hi all, how to include variables from one .cc file to other? -- With Regards, John Shiny.J
Re: [ns] Regarding Routing
Hello Saravanan, I have designed a protocol while rounning various simulations ...sometimes it chrashes due to... terminate called after throwing instance of 'std::bad_alloc' what():bad_alloc As of now from the internet I found this error is due to memory shortage ...means somehoe my protocol require large mermory... I need your suggestion...regarding What is the real problem and how to overcome it? Any suggestion would be appreciated. Itishi. From: Saravanan Kandasamy svana...@gmail.com To: ns-users@isi.edu ns-users@ISI.EDU Sent: Tuesday, 5 February 2013 7:07 AM Subject: Re: [ns] Regarding Routing Gopi, Have you tried to google? Much information is there, just need to spend some time doing research. 1. For single hop network you dont need routing. You may use dumbagent. 2. There are some implementation for static routing in the web, some uses DSR as base and some created their own way for filling the routing table. Check out for NOAH or FixRT. Good luck. rgds Saravanan K On Wed, Jan 30, 2013 at 5:59 AM, gopi gopi_...@yahoo.co.in wrote: Dear ns users, can anyone tell me, how to add static routing for wireless network... Regards, T.Gopi.
Re: [ns] Bind a float
Dear Rafeal, I am not sure where you like to do this binding. When you declare your variable number_ in file.h ensure you choose a data structure that accepts a float, e.g double number_; rgds Saravanan K On Mon, Jan 28, 2013 at 7:07 PM, Rafael P B Mota rafaelpera...@gmail.com wrote: How can I bind a float member ? For example, when I bind an integer (bind(value_,value_) it works. When I bind a float (bind(number_,number_) I receive errors. What can I do to solve this problem ? Thanks, -- Rafael Perazzo B Mota rafaelpera...@gmail.com Web-page: https://sites.google.com/site/rafaelperazzo/ Doutorando em Ciência da Computação Universidade de São Paulo (USP) Campus da Capital Instituto de Matemática e estatística (IME) --
Re: [ns] Transmission range
Rafael, You would need to spend more time with NS2 manual. 1. How can I change the transmission power to allow 2 nodes communicate themselves at a max distance of 5m ? It depends on the propagation model you are using. Since its just 5 m, you may check Friis as Two Way Ground behaves as Friis as it operate below cut off frequency (assuming you are operating in a frequency above 2GHz). You would find the right Pt_ value when Pr at 5m is =RxThreshold using your preferred propagation model. You may write you own simple code, use excel sheet or even use a built in program in NS2, I think its in the folder named tools. How can I calculate the Pt_ value ? 2. Refer above. What does a 0.28 Pt_ value mean ? 3. Its 0.28W rgds Saravanan K On Sat, Jan 26, 2013 at 7:56 PM, Rafael P B Mota rafaelpera...@gmail.com wrote: How can I change the transmission power to allow 2 nodes communicate themselves at a max distance of 5m ? How can I calculate the Pt_ value ? What does a 0.28 Pt_ value mean ? Thanks
Re: [ns] Packet loss effect on End2End Delay
Saleem, Why not create a test scenario in NS2 and find out the answer. You may induce packet loss systematically and observe your preferred parameter. rgds Saravanan K On Wed, Jan 30, 2013 at 11:03 AM, saleem khan star_s...@yahoo.com wrote: Hi All, is there any effect of packet loss on End2End Delay in OLSR routing protocol? For example if a routing protocol has more packet loss then wat about the end2end delay..either it will be increasing or decreasing with packet loss? Thanks in advance Muhammad Saleem Khan Ph.D(CS) , COMSATS Institute of Information Technology, Islamabad. Cell No# 0346-9754454
[ns] Regarding Scheduling a channel access.
Hi all I need some help. How can I make a node to access the channel a particular number of times. I mean suppose I have a number like 400 , then how can I make a node to transmit only 400 times and rest of the time in backoff. Please help me .Thanks in advance. Thanks. -- Bhyravajosyula Sai Vishnu Kiran MS in Computer Science mail-id: sbhyr...@asu.edu
Re: [ns] Regarding Scheduling a channel access.
Why you want to do that? Aint the objective of a network is to provide as much throughput as you can? You said nothing about your setup, protocols you are using etc. Dont have the liberty to assume ourselves. A typical reason on getting lack of support -- SK On Mon, Feb 4, 2013 at 10:54 PM, Sai Bhyravajosyula sbhyr...@asu.edu wrote: Hi all I need some help. How can I make a node to access the channel a particular number of times. I mean suppose I have a number like 400 , then how can I make a node to transmit only 400 times and rest of the time in backoff. Please help me .Thanks in advance. Thanks. -- Bhyravajosyula Sai Vishnu Kiran MS in Computer Science mail-id: sbhyr...@asu.edu
Re: [ns] Regarding Scheduling a channel access.
Thanks for the reply. Rather than throughput the concept here is the fairness. Setup protocols : MAC802.11 , AODV,CBR in UDP. Main objective is to use a magical number in sensing or accessing the channel. Please let me know if you have any further questions. On Mon, Feb 4, 2013 at 4:19 PM, Saravanan Kandasamy svana...@gmail.com wrote: Why you want to do that? Aint the objective of a network is to provide as much throughput as you can? You said nothing about your setup, protocols you are using etc. Dont have the liberty to assume ourselves. A typical reason on getting lack of support -- SK On Mon, Feb 4, 2013 at 10:54 PM, Sai Bhyravajosyula sbhyr...@asu.edu wrote: Hi all I need some help. How can I make a node to access the channel a particular number of times. I mean suppose I have a number like 400 , then how can I make a node to transmit only 400 times and rest of the time in backoff. Please help me .Thanks in advance. Thanks. -- Bhyravajosyula Sai Vishnu Kiran MS in Computer Science mail-id: sbhyr...@asu.edu -- Bhyravajosyula Sai Vishnu Kiran MS in Computer Science mail-id: sbhyr...@asu.edu
Re: [ns] Regarding Scheduling a channel access.
Hi, Do note it is no longer 802.11 once done the below changes. Your network might crumble after the 400th packets as the queue works as FIFO, only when a packet goes out another will replace it. There are two ways to do this, 1. Open ns manual and look for mobile node schema for wireless diagram. Do see which variable places the actual packet in channel. Look for the variable in your code, put a counter there, anything above it you can trigger channel as busy. 2. Since you are testing only cbr. Can generate only 400 packets and increase the queue size to accommodate 400 packets or more. Can measure fairness while not compromising the integrity of the protocols. If like to test say 500pkts on the same network, can do the same but with queue size 500 pkts or more. It becomes like infinite queue scenario. rgds Saravanan K On Mon, Feb 4, 2013 at 11:24 PM, Sai Bhyravajosyula sbhyr...@asu.edu wrote: Thanks for the reply. Rather than throughput the concept here is the fairness. Setup protocols : MAC802.11 , AODV,CBR in UDP. Main objective is to use a magical number in sensing or accessing the channel. Please let me know if you have any further questions. On Mon, Feb 4, 2013 at 4:19 PM, Saravanan Kandasamy svana...@gmail.com wrote: Why you want to do that? Aint the objective of a network is to provide as much throughput as you can? You said nothing about your setup, protocols you are using etc. Dont have the liberty to assume ourselves. A typical reason on getting lack of support -- SK On Mon, Feb 4, 2013 at 10:54 PM, Sai Bhyravajosyula sbhyr...@asu.edu wrote: Hi all I need some help. How can I make a node to access the channel a particular number of times. I mean suppose I have a number like 400 , then how can I make a node to transmit only 400 times and rest of the time in backoff. Please help me .Thanks in advance. Thanks. -- Bhyravajosyula Sai Vishnu Kiran MS in Computer Science mail-id: sbhyr...@asu.edu -- Bhyravajosyula Sai Vishnu Kiran MS in Computer Science mail-id: sbhyr...@asu.edu
[ns] how to estimate transmission failures in mac layer?
hi all, how to calculate number of transmission failures in mac layer using ns2? -- With Regards, John Shiny.J
