Re: [ns] Could not schedule timer
Scott, I also got the error in the same routine. The error surfaces when the traffic increases a lot. Probably in that case it becomes difficult to handle the increased number of timers. If I change it to resched (as someone had suggested), then I start getting segmentation fault. If you come across some solution, please update me as well. Tarun http://bansal.tarun.googlepages.com/ On 2/17/07, Scott Ricketts [EMAIL PROTECTED] wrote: I am having the same problem (ns-2.30). The bad timer in my case is mhCS_, the carrier sense timer. It throws the error during the following call in SMAC::checkToSend() ... mhCS_.sched(CLKTICK2SEC(difs_) + cw); ... Tarun, can you investigate your code and try to find out when your error is getting thrown? Perhaps the author of this code might have some better intuition about the problem. Is it a bug in smac.cc, or am I doing something wrong? My code works fine when I replace Mac/SMAC with Mac for my MAC protocol -- but obviously I would prefer to use S-MAC. Thanks, Scott On 1/23/07, Tarun Bansal [EMAIL PROTECTED] wrote: I tried doing that...The error is coming from SMAC protocol. (I am simulating mobile wireless network with SMAC protocol using NS 2.29) SMAC is setting timer somewhere using sched and that gives the error. The error comes when timer is already scheduled and SMAC reschedules that. Anyone, who has faced this before? I would not like to play with SMAC code Regards Tarun On 1/23/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: This query has been posted in past also but my search for the solutions was unsuccessful: When I run my NS script with heavy traffic, the execution sometimes stop in between giving the error as Couldn't schedule timer. I am also using my own timer for acknowledgement timeout. Does this refer to the internal timer or my own defined timer? It seems that this is the internal timer (common/timer-handler.cc), unless you fprint the same text with your own timer. Make sure by e.g. editing the line fprintf(stderr,Couldn't schedule timer); in common/timer-handler.cc to fprintf(stderr,Couldn't schedule timer from timer-handler.cc); Then recompile ns-2, reinstall it, and run your tcl script. If the text that ns-2 prints out matches your changes in common/timer-handler.cc, then you know which timer this text refers to. How can I avoid this error? It seems that your ns-2 sets the timer to idle state somewhere. Try to check where it does it. Tarun Regards, Filip
Re: [ns] node genration problem
There seems to be a problem in your routing agent. Match your code
with that of DumbAgent (another routing protocol which does not do
anything): /ns/ns-allinone-2.30/ns-2.30/mobile/dumb-agent.*
Tarun Bansal
http://bansal.tarun.googlepages.com/
On 2/13/07, shams haq [EMAIL PROTECTED] wrote:
- Forwarded Message
From: shams haq [EMAIL PROTECTED]
To: ns-users@isi.edu
Sent: Monday, February 12, 2007 10:38:05 AM
Subject: tcl or routing agent problem
hi all buddies i am stuck at a point and need immediate help if anybody can
do for me i have run script simple-wireless.tcl on my routing agent my
routing agent do nothing but i have construct structure for my agent. when i
ran make my object file has been made but when in simple-wireless.tcl, i use
my own routing agent it gives following errors plz help me out in this
situation thanx in advance
num_nodes is set 2
warning: Please use -channel as shown in tcl/ex/wireless-mitf.tcl
INITIALIZE THE LIST xListHead
(_o17 cmd line 1)
invoked from within
_o17 cmd port-dmux _o26
invoked from within
catch $self cmd $args ret
invoked from within
if [catch $self cmd $args ret] {
set cls [$self info class]
global errorInfo
set savedInfo $errorInfo
error error when calling class $cls: $args $...
(procedure _o17 line 2)
(SplitObject unknown line 2)
invoked from within
$agent port-dmux $dmux_
(procedure _o14 line 11)
(Node/MobileNode add-target-rtagent line 11)
invoked from within
$self add-target-rtagent $agent $port
(procedure _o14 line 23)
(Node/MobileNode add-target line 23)
invoked from within
$self add-target $agent $port
(procedure _o14 line 15)
(Node attach line 15)
invoked from within
$node attach $ragent [Node set rtagent_port_]
(procedure _o3 line 71)
(Simulator create-wireless-node line 71)
invoked from within
_o3 create-wireless-node
(eval body line 1)
invoked from within
eval $self create-wireless-node $args
(procedure _o3 line 14)
(Simulator node line 14)
invoked from within
$ns_ node
(for body line 2)
invoked from within
for {set i 0} {$i $val(nn) } {incr i} {
set node_($i) [$ns_ node]
$node_($i) random-motion 0 ;# disable random motion
}
(file
/root/ns-allinone-2.28/ns-2.28/ns-tutorial/examples/simple-wireless.tcl
line 93)
[EMAIL PROTECTED] ns-2.28]#
regards;
shams
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[ns] Channel.h: Compilation error for Mac/Csma/Ca?
I was trying to compile mac/mac-csma.cc and mac/mac-csma.h by making relevant changes in the makefile. But it seems to give some problems. After making changes, when I do make depend and Make, it gives the following errors: mac/mac-csma.cc: In member function 'virtual void MacCsma::send(Packet*)': mac/mac-csma.cc:107: error: 'class Channel' has no member named 'txstop' mac/mac-csma.cc:135: error: 'class Channel' has no member named 'contention' mac/mac-csma.cc: In member function 'virtual void MacCsma::backoff(Handler*, Packet*, double)': mac/mac-csma.cc:148: error: 'class Channel' has no member named 'txstop' mac/mac-csma.cc: In member function 'virtual void MacCsma::endofContention(Packet*)': mac/mac-csma.cc:163: error: 'class Channel' has no member named 'send' mac/mac-csma.cc: In member function 'virtual void MacCsmaCd::endofContention(Packet*)': mac/mac-csma.cc:173: error: 'class Channel' has no member named 'collision' mac/mac-csma.cc:174: error: 'class Channel' has no member named 'jam' mac/mac-csma.cc: In member function 'virtual void MacCsmaCa::send(Packet*)': mac/mac-csma.cc:185: error: 'class Channel' has no member named 'txstop' mac/mac-csma.cc:191: error: 'class Channel' has no member named 'contention' make: *** [mac/mac-csma.o] Error 1 When I looked through channel.h, I found that all those variables have been commented. Just want to know why those variables have been commented? I am using NS2.30 on FC4 machine Thanks Tarun Bansal
Re: [ns] Could not schedule timer
I tried doing that...The error is coming from SMAC protocol. (I am simulating mobile wireless network with SMAC protocol using NS 2.29) SMAC is setting timer somewhere using sched and that gives the error. The error comes when timer is already scheduled and SMAC reschedules that. Anyone, who has faced this before? I would not like to play with SMAC code Regards Tarun On 1/23/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: This query has been posted in past also but my search for the solutions was unsuccessful: When I run my NS script with heavy traffic, the execution sometimes stop in between giving the error as Couldn't schedule timer. I am also using my own timer for acknowledgement timeout. Does this refer to the internal timer or my own defined timer? It seems that this is the internal timer (common/timer-handler.cc), unless you fprint the same text with your own timer. Make sure by e.g. editing the line fprintf(stderr,Couldn't schedule timer); in common/timer-handler.cc to fprintf(stderr,Couldn't schedule timer from timer-handler.cc); Then recompile ns-2, reinstall it, and run your tcl script. If the text that ns-2 prints out matches your changes in common/timer-handler.cc, then you know which timer this text refers to. How can I avoid this error? It seems that your ns-2 sets the timer to idle state somewhere. Try to check where it does it. Tarun Regards, Filip
Re: [ns] error while loading shared libraries: libpcap.so.0.6.2
Search for Problem: Things built OK but don't run because of missing shared libraries on http://www.isi.edu/nsnam/ns/ns-problems.html Regards Tarun On 1/15/07, zenith siea [EMAIL PROTECTED] wrote: error while loading shared libraries: libpcap.so.0.6.2: the error: [EMAIL PROTECTED] ~]$ ns ns: error while loading shared libraries: libpcap.so.0.6.2: cannot open shared object file: No such file or directory There is an error when i am trying to exec some ns simulation script. I have just installed FedoraCore4 Linux with all packages, and then i downloaded and installed the latest ns2.30 succesfully. this error occured whenever i execute ns simulation: [EMAIL PROTECTED] ~]$ ns ns: error while loading shared libraries: libpcap.so.0.6.2: cannot open shared object file: No such file or directory [EMAIL PROTECTED] ~]$ ns example.tcl ns: error while loading shared libraries: libpcap.so.0.6.2: cannot open shared object file: No such file or directory I have tried to use another old version ns2.26 in this FC4 system, the same error comes out too. It seems that its not because ns but FC4. I have googled this error, comes out only one result, it is just the same as my error, is is in this ns maillist, but the only reply to that mail is very simple, only one url(http://gamma.isi.edu/pipermail/ns-users/attachments/20040221/e48d6fb7/attachment.html) is given as the answer, but, I just can not conncet to this url! so, i have to do it my self, i tried to do some trick by doing some ln: [EMAIL PROTECTED] ~]$ ns ns: error while loading shared libraries: libpcap.so.0.6.2: cannot open shared object file: No such file or directory [EMAIL PROTECTED] ~]$ whereis libpcap.* libpcap: /usr/lib/libpcap.a /usr/lib/libpcap.so [EMAIL PROTECTED] ~]$ cd /usr/lib/ [EMAIL PROTECTED] lib]$ ls -l -s -a libpcap.* 224 -rw-r--r-- 1 root root 220660 2005-04-28 libpcap.a 4 lrwxrwxrwx 1 root root 16 1月 6 11:53 libpcap.so - libpcap.so.0.8.3 4 lrwxrwxrwx 1 root root 16 1月 6 11:53 libpcap.so.0 - libpcap.so.0.8.3 4 lrwxrwxrwx 1 root root 16 1月 6 11:53 libpcap.so.0.8 - libpcap.so.0.8.3 160 -rwxr-xr-x 1 root root 152240 2005-04-28 libpcap.so.0.8.3 160 -rwxr-xr-x 1 root root 152240 1月 11 16:13 libpcap.so.0.8.3.backup [EMAIL PROTECTED] lib]$ ln -s libpcap.so.0.8.3 libpcap.so.0.6.2 ln: 正在创建连至'libpcap.so.0.8.3'的符号链接'libpcap.so.0.6.2': 权限不够 [EMAIL PROTECTED] lib]$ sudo ln -s libpcap.so.0.8.3 libpcap.so.0.6.2 Password: [EMAIL PROTECTED] lib]$ ls -l -s -a libpcap.* 224 -rw-r--r-- 1 root root 220660 2005-04-28 libpcap.a 4 lrwxrwxrwx 1 root root 16 1月 6 11:53 libpcap.so - libpcap.so.0.8.3 4 lrwxrwxrwx 1 root root 16 1月 6 11:53 libpcap.so.0 - libpcap.so.0.8.3 4 lrwxrwxrwx 1 root root 16 1月 11 17:11 libpcap.so.0.6.2 - libpcap.so.0.8.3 4 lrwxrwxrwx 1 root root 16 1月 6 11:53 libpcap.so.0.8 - libpcap.so.0.8.3 160 -rwxr-xr-x 1 root root 152240 2005-04-28 libpcap.so.0.8.3 160 -rwxr-xr-x 1 root root 152240 1月 11 16:13 libpcap.so.0.8.3.backup [EMAIL PROTECTED] lib]$ ns ns: /usr/lib/libstdc++.so.5: version `CXXABI_1.2' not found (required by ns) ns: /usr/lib/libstdc++.so.5: version `GLIBCPP_3.2' not found (required by ns) [EMAIL PROTECTED] lib]$ So, some more errors comes out, it is not a simple puzzle, and i do not know what to do the next step. Will ns be ok in FC4 if i make ns with out LBNL packet capture library? I have read part viii emulation chapter 39 of the ns manual, also i have read configure file and make file, i find no configure option to disable emulation function of ns, what should i do? How to let ns run in my FC4?
[ns] Broadcasting user defined packets
Hi All, I was playing with the ping packet tutorial by Marc Greis. I want to send ping packets over a broadcast address in wireless media. I was able to port ping program to wireless media. My question is how do I set the destination address as broadcast address. In mailing list, I found that the solution is: hdr_ip* hdrip = (hdr_ip*)pkt-access(off_ip_); hdrip-daddr() = IP_BROADCAST; hdr_cmn* cmh = (hdr_cmn*)HDR_CMN(pkt); cmh-direction() = hdr_cmn::DOWN; cmh-next_hop_ = IP_BROADCAST; cmh-addr_type_ = NS_AF_INET; However since PING is an user defined packet, there won't be an IP part of it. So how do we set the next hop information so as to make it as a broadcast packet? Tarun
