遇到这个问题时运行 ns2 .tcl 文件时出现分段错误 (核心已转储)

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英文:

faced this problem when runnning ns2 .tcl file Segmentation fault (core dumped)

问题

I understand your request. Here are the translated portions of the text:

  1. Error message related to running an NS2 simulation:

    • "faced this problem when try to run ns2 simulation.tcl file below this error "Segmentation fault (core dumped)""

  2. Configuration options for the NS2 simulation:

    • Various configuration settings are specified for the simulation.

  3. Command for finding and deleting broken packages:

    • "I tried to find the broken packages and delete them forcefully using this command "sudo dpkg -l | grep ^..r | apt-get purge" and again the following error happened"

  4. Error message related to permission denied when running the package management command:

    • "[sudo] password for derara: E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied) E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?"
英文:

faced this problem when try to run ns2 simulation.tcl file below this error "Segmentation fault (core dumped)"

`

  1. `# define options 
  2.  set val(chan) Channel/WirelessChannel                                      ;# channel type
  3.  set val(prop) Propagation/TwoRayGround           ;# radio propagation             model 
  4.  set val(netif) Phy/Wireless                                     ;# network interface type 
  5.  set val(mac) Mac/802_11                                                        ;# MAC type 
  6.  set val(ifq) Queue/DropTail/PriQueue                 ;# interface queue type 
  7.  set val(ll) LL                                        ;#Link layer type 
  8.  set val(ant) Antenna/OmniAntenna                                ;# antenna model 
  9.  set val(ifqlen) 50                                                   ;# max packet in ifq
  10.  set val(nn) 50                                              ;# number of mobile nodes 
  1. set val(rp) MDAOMDV                                                        ;# Routing protocol 
  2. set val(x) 800                                                    ;# X dimension of topography 
  3. set val(y) 800                                                    ;# Y dimension of topography
  4. set val(stop) 50                                                    ;# time of simulation end  
  5. set val(energymodel) EnergyModel                                               ; 
  6. set val(n_ch) chan_1 
  7. #------------------------------------------------------------------------------ 
  8. # ------------------------------------------------------------------------------ 
  9. #remove-all-packet-headers 
  10. #add- packet header IP LL Mac AODV AOMDV ATR DSDV DSR OLSR UDP TCP CBR FTP   ;# needed headers 
  11. Mac /802_11 set CWMin_31 
  12. Mac /802_11 set CWMax_1023 
  13. Mac /802_set Slot Time _0.000020                                                  ;# 20us 
  14. Mac /802_11 set SIFS_0.000010                                                        ;# 10us 
  15. Mac /802_11 set preamble Length_144                                                 ;# 144 bit 
  16. Mac /802_11 set short preamble Length _                                          ;# 72 bit 
  17. Mac /802_ set preamble data rate_1.0e6                                              ;# 1Mbps
  18. Mac /802_11 set PLCP  Header Length_ 48                                              ;# 48 bits 
  19. Mac /802_11 set PLCP Data Rate_1.0e6                                               ;# 1Mbps 
  20. Mac /802_11 set Short PLCP Data Rate_2.0e6                                             ;# 2Mbps 
  21. Mac /802_11 set RTS Threshold_3000                                                 ;# bytes 
  22. Mac /802_11 set Short Retry Limit_7                                          ;# retransmissions 
  23. Mac /802_11 set Long Retry Limit _4                                      ;# retransmissions 
  24. Mac /802_11 set new chipset_ false                  ;# use new chipset , allowing a more recent packet to be correctly received in place of the first sensed packet 
  25. Mac /802_11 set Data Rate _2Mb                                ;# 802.11 data transmission rate 
  26. Mac/802_11 set basic Rate_1Mb                                ;# 802.11 basic transmission 
  27. Mac /802_11 set aarf_ false 
  28. # creating simulation: 
  29. set ns [new Simulator]
  30. #use colors to differentiate the traffics 
  31. $ns color 1 Green 
  32. # creating nam and trace file: 
  33. set trace fd[open mdaomdv.tr w] 
  34. set namtrace [open mdaomdv.nam w] 
  35. $ns trace _ all $ tracefd 
  36. $ns nam trace-all-wireless $nam trace $val (x) $ val(y) 
  37. #set up topography object 
  38. Set topo[new Topography] 
  39. $topo load_ flat grid $val(x) $val(y) 
  40. Set god_[create-god val(nn)] 
  41. #configure the nodes 
  42. $ns node-config-ad hoc routing $val (rp) \ 
  43. -ll Type $val(ll) \ 
  44. -mac Type $val(mac) \ 
  45. -ifq Type $ val (ifq)  \ 
  46. -ifq Len $val (ifqlen) \ 
  47. -ant Type $ val(ant) \ 
  48. -prop Type $ (prop) \ 
  49. -phy Type $val(net if) \ 
  50. -channel Type $ val (chann) \ 
  51. -topo Instance $topo \ 
  52. -agent Trace ON \ 
  53. -router Trace ON \ 
  54. -mac Trace OFF \ 
  55. -movement Trace ON 
  56. -channel $chan_1 \ 
  57. -energy Model $ val (energy model) \ 
  58. #-rx power 0.3 \ 
  59. #-tx power 0.6 \ 
  60. #-initial Energy 90 
  61. ## creating node object  
  62. For {set i 0} {$i < 20} { incr i } { 
  63. Set node _ ($i) [$ns node] 
  64. } for {set i 0} {$i < 20} {incr i } { 
  65. $node _($i) color blue 
  66. $ns at 0.0 "$node_($i) color blue"
  67. } 
  68. for {set i 20} {$i < 30 } { incr i } { 
  69. set node _($) [$ns node] 
  70. } 
  71. for {set i 20} {$i < 30 } {incr i } { 
  72. $node_($i) color cyan 
  73. $ns at 1.0 "$node_($i) color cyan"
  74. } 
  75. for {set i 30} {$i < 50 } { incr i } { 
  76. set node_($i) [$ns node] 
  77. } 
  78. for {set i 20} {$i < 50 } {incr i } { 
  79. $node_($i) color red 
  80. $ns at 2.0 "$node_($i) color red"
  81. } 
  82. ##provide initial location of mobile nodes. 
  83. for {set i 0} {$i < $val(nn) } { incr i } { 
  84. set xx [expr rand()*800] 
  85. set yy [expr rand()* 800] 
  86. $node_($i) set X_ $xx 
  87. $node_($i) set Y_ $yy 
  88. } 
  89. # Define node initial position in nam 
  90. for {set i 0} {$i < $val(nn)} { incr i } { 
  91. # defines the node size for nam  
  92. $ns initial_ node_ pos $node_($i) 30  
  93. }
  94. Proc stop {} { 
  95. Global ns tracefd nam trace 
  96. $ns flush-trace 
  97. Close $tracefd 
  98. Close $nam trace 
  99. Exec nam mdaomdv.nam &
  100. } 
  101. $ns run `

I tried to find the broken packages and delete them forcefully using this command "sudo dpkg -l | grep ^..r | apt-get purge" and again the following error happened

[sudo] password for derara: E: Could not open lock file /var/lib/dpkg/lock-frontend - open (13: Permission denied)
E: Unable to acquire the dpkg frontend lock (/var/lib/dpkg/lock-frontend), are you root?

答案1

得分: 0

以下是翻译好的部分：

"Segmentation fault is not caused by any "broken Ubuntu packages", but by plenty of typos etc. errors in your "mdaomdv.tcl" file."
"分段错误不是由任何“损坏的Ubuntu软件包”引起的，而是由您的“mdaomdv.tcl”文件中的许多拼写错误等错误引起的。"

"Section "ns node-config": <kbd>Space</kbd> after \ is forbidden."
"部分“ns node-config”：在\后<kbd>Space</kbd>是禁止的。"

"The tcl/otcl code: For is spelled 'for', Set is 'set', Proc is 'proc', Global is 'global', Close is 'close', Exec is 'exec'."
"Tcl/otcl代码：For拼写为'for'，Set拼写为'set'，Proc拼写为'proc'，Global拼写为'global'，Close拼写为'close'，Exec拼写为'exec'。"

"For correct spelling, please read e.g. EnergyModel-examples-7.tar.gz https://drive.google.com/file/d/1g8WnlHHHnNXBLc0rwJY4i1z9uieKtl9s/view?usp=sharing"
"正确的拼写，请阅读例如EnergyModel-examples-7.tar.gz https://drive.google.com/file/d/1g8WnlHHHnNXBLc0rwJY4i1z9uieKtl9s/view?usp=sharing"

"Ref. https://drive.google.com/drive/folders/0B7S255p3kFXNSmRYb2lGcDRUdWs?resourcekey=0-vrEMHtGTFP3yLoTQz_UAwA&amp;usp=share_link"
"参考 https://drive.google.com/drive/folders/0B7S255p3kFXNSmRYb2lGcDRUdWs?resourcekey=0-vrEMHtGTFP3yLoTQz_UAwA&amp;usp=share_link"

"Besides that, traffic is missing in the file. I added a line source cbr-50-20-4-512ns to include a necessary example of traffic/communication → Your edited file, example "111_aomdv.tcl" + the traffic file : The AOMDV protocol is used, instead of your unknown MDAOMDV. The two files were uploaded to → → https://drive.google.com/drive/folders/14vdJfoIqqKj34clkdxuN0IclHc0o0Oml?usp=share_link"
"除此之外，文件中缺少流量。我添加了一行source cbr-50-20-4-512ns，以包含必要的流量/通信示例 → 您编辑的文件，示例“111_aomdv.tcl” + 流量文件：使用AOMDV协议，而不是您不知道的MDAOMDV。这两个文件已上传到 → → https://drive.google.com/drive/folders/14vdJfoIqqKj34clkdxuN0IclHc0o0Oml?usp=share_link"

请注意，由于文本中包含了一些HTML转义字符，如"，<，&等，这些字符在翻译中保留了原样。

英文:

Segmentation fault is not caused by any "broken Ubuntu packages", but by plenty of typos etc. errors in your "mdaomdv.tcl" file.
Section "ns node-config": <kbd>Space</kbd> after \ is forbidden.
The tcl/otcl code: For is spelled 'for', Set is 'set', Proc is 'proc', Global is 'global', Close is 'close', Exec is 'exec'.
For correct spelling, please read e.g. EnergyModel-examples-7.tar.gz https://drive.google.com/file/d/1g8WnlHHHnNXBLc0rwJY4i1z9uieKtl9s/view?usp=sharing

Ref. https://drive.google.com/drive/folders/0B7S255p3kFXNSmRYb2lGcDRUdWs?resourcekey=0-vrEMHtGTFP3yLoTQz_UAwA&amp;usp=share_link

Besides that, traffic is missing in the file. I added a line source cbr-50-20-4-512ns to include a necessary example of traffic/communication → Your edited file, example "111_aomdv.tcl" + the traffic file : The AOMDV protocol is used, instead of your unknown MDAOMDV. The two files were uploaded to → →
https://drive.google.com/drive/folders/14vdJfoIqqKj34clkdxuN0IclHc0o0Oml?usp=share_link

111_aomdv.tcl

  1.  # define options 
  2.  set val(chan) Channel/WirelessChannel                                      ;# channel type
  3.  set val(prop) Propagation/TwoRayGround           ;# radio propagation             model 
  4.  set val(netif) Phy/WirelessPhy          ;# !!!EDITED !!!  ;# network interface type 
  5.  set val(mac) Mac/802_11                                                        ;# MAC type 
  6.  set val(ifq) Queue/DropTail/PriQueue                 ;# interface queue type 
  7.  set val(ll) LL                                        ;#Link layer type 
  8.  set val(ant) Antenna/OmniAntenna                                ;# antenna model 
  9.  set val(ifqlen) 50                                                   ;# max packet in ifq
  10.  set val(nn)	50                                              ;# number of mobile nodes 
  12. set val(rp) 	AOMDV			;# MDAOMDV   ;# Routing protocol 
  13. set val(x) 800                                                    ;# X dimension of topography 
  14. set val(y) 800                                                    ;# Y dimension of topography
  15. set val(stop) 500                                                   ;# time of simulation end  
  16. set val(energymodel) EnergyModel                                               ; 
  17. set val(n_ch) chan_1
  18. set val(initialenergy)  90   ;# edited/added ##########  ;# Initial energy in Joules
  19. #----------------------------------------- 
  20. # ---------------------------------------- 
  21. #remove-all-packet-headers 
  22. #add- packet header IP LL Mac AODV AOMDV ATR DSDV DSR OLSR UDP TCP CBR FTP   ;# needed headers 
  23. Mac /802_11 set CWMin_31 
  24. Mac /802_11 set CWMax_1023 
  25. Mac /802_set Slot Time _0.000020                                                  ;# 20us 
  26. Mac /802_11 set SIFS_0.000010                                                        ;# 10us 
  27. Mac /802_11 set preamble Length_144                                                 ;# 144 bit 
  28. Mac /802_11 set short preamble Length _                                          ;# 72 bit 
  29. Mac /802_ set preamble data rate_1.0e6                                              ;# 1Mbps
  30. Mac /802_11 set PLCP  Header Length_ 48                                              ;# 48 bits 
  31. Mac /802_11 set PLCP Data Rate_1.0e6                                               ;# 1Mbps 
  32. Mac /802_11 set Short PLCP Data Rate_2.0e6                                             ;# 2Mbps 
  33. Mac /802_11 set RTS Threshold_3000                                                 ;# bytes 
  34. Mac /802_11 set Short Retry Limit_7                                          ;# retransmissions 
  35. Mac /802_11 set Long Retry Limit _4                                      ;# retransmissions 
  36. Mac /802_11 set new chipset_ false                  ;# use new chipset , allowing a more recent packet to be correctly received in place of the first sensed packet
  38. Mac /802_11 set Data Rate _2Mb                                ;# 802.11 data transmission rate 
  39. Mac/802_11 set basic Rate_1Mb                                ;# 802.11 basic transmission 
  40. Mac /802_11 set aarf_ false
  42.  
  43. # creating simulation: 
  44. set ns [new Simulator]
  45. # use colors to differentiate the traffics 
  46. $ns color 1 green 
  47. # creating nam and trace file: 
  48. set tracefd [open mdaomdv.tr w]		;# edited 
  49. set namtrace [open mdaomdv.nam w] 
  50. $ns trace-all $tracefd		 ;# edited
  51. $ns namtrace-all-wireless $namtrace $val(x) $val(y)		;# edited
  53.  
  54. #set up topography object   		
  55. set topo	[new Topography]	;# edited		
  56. $topo load_flatgrid $val(x) $val(y)	;# edited
  58. set god_	[create-god val(nn)]
  59.  
  60. #configure the nodes		#### section is edited #################
  61. ## all lines in this section are edited, +added: -initialEnergy $val(initialenergy) #####
  62. $ns node-config -adhocRouting $val(rp) \
  63. -llType $val(ll) \
  64. -macType $val(mac) \
  65. -ifqType $val(ifq) \
  66. -ifqLen $val(ifqlen) \
  67. -antType $val(ant) \
  68. -propType $val(prop) \
  69. -phyType $val(netif) \
  70. -channelType $val(chan) \
  71. -topoInstance $topo \
  72. -agentTrace ON \
  73. -routerTrace ON \
  74. -macTrace OFF \
  75. -movementTrace ON \
  76. -n_chType  $val(n_ch) \
  77. -energyModel $val(energymodel) \
  78. #-rx power 0.3 \
  79. #-tx power 0.6 \
  80. -initialEnergy $val(initialenergy)
  83. ## creating node object  ### edited section ################
  84. for {set i 0} {$i &lt; $val(nn) } {incr i} {
  85. 		set node_($i) [$ns node]	
  86. #		$node_($i) random-motion 0
  87. 		}
  89. for {set i 0} {$i &lt; 20} {incr i} {		;# edited
  90. $node_($i) color blue
  91. $ns at 0.0 &quot;$node_($i) color blue&quot;
  92. } 
  93. for {set i 20} {$i &lt; 30} {incr i} { 
  94. set node_($) [$ns node]				
  95. } 
  96. for {set i 20} {$i &lt; 30} {incr i} { 
  97. $node_($i) color cyan
  98. $ns at 1.0 &quot;$node_($i) color cyan&quot;
  99. } 
  100. for {set i 30} {$i &lt; 50} {incr i} { 
  101. set node_($i) [$ns node] 
  102. }
  103. for {set i 20} {$i &lt; 50} {incr i} {
  104. $node_($i) color red
  105. $ns at 2.0 &quot;$node_($i) color red&quot;
  106. }
  108. source cbr-50-20-4-512ns
  109.  
  110. # provide initial location of mobile nodes 
  111. for {set i 0} {$i &lt; $val(nn) } { incr i } { 
  112. set xx [expr rand()*800] 
  113. set yy [expr rand()* 800] 
  114. $node_($i) set X_ $xx 
  115. $node_($i) set Y_ $yy 
  116. }
  117.  
  118. # Define node initial position in nam    ;# this section is edited #####
  119. for {set i 0} {$i &lt; $val(nn)} {incr i} { 
  120. # defines the node size for nam  
  121. $ns initial_node_pos $node_($i) 30  
  122. }
  124. proc stop {} { 
  125. global ns tracefd nam trace 
  126. $ns flush-trace 
  127. close $tracefd 
  128. close $nam trace 
  129. }
  131. # Tell all the nodes when the simulation ends ###############
  132. for {set i 0} {$i &lt; $val(nn) } {incr i} {
  133.     $ns at $val(stop).000000001 &quot;$node_($i) reset&quot;;
  134. }
  135. $ns at $val(stop).00000001 &quot;puts \&quot;NS EXITING...\&quot; ; $ns halt&quot;
  137. $ns run
  139. exec nam mdaomdv.nam &amp;

huangapple
  • 本文由 发表于 2023年3月3日 22:17:25
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  • ns2
  • simulation
  • ubuntu
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