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  1. ----- Stop and Wait Network Simulator Version 1.1 --------
  2.  
  3. Enter the number of messages to simulate: 20
  4. Enter packet loss probability [enter 0.0 for no loss]:.1
  5. Enter packet corruption probability [0.0 for no corruption]:.1
  6. Enter average time between messages from sender's layer5 [ > 0.0]:1000
  7. Enter TRACE:2
  8.  
  9. EVENT time: 93.569748, type: 1, fromlayer5 entity: A
  10.  
  11. EVENT time: 99.062195, type: 2, fromlayer3 entity: B
  12. B: Received OK. seq num 0 -> 1.
  13.  
  14. EVENT time: 101.561325, type: 2, fromlayer3 entity: A
  15. A: ACK OK. seq num 0 -> 1.
  16.  
  17. EVENT time: 1607.715088, type: 1, fromlayer5 entity: A
  18.  
  19. EVENT time: 1609.116333, type: 2, fromlayer3 entity: B
  20. B: Received OK. seq num 1 -> 0.
  21.  
  22. EVENT time: 1614.552979, type: 2, fromlayer3 entity: A
  23. A: ACK OK. seq num 1 -> 0.
  24.  
  25. EVENT time: 2322.031250, type: 1, fromlayer5 entity: A
  26.  
  27. EVENT time: 2325.527344, type: 2, fromlayer3 entity: B
  28. B: Received OK. seq num 0 -> 1.
  29.  
  30. EVENT time: 2328.412354, type: 2, fromlayer3 entity: A
  31. A: ACK OK. seq num 0 -> 1.
  32.  
  33. EVENT time: 3332.804199, type: 1, fromlayer5 entity: A
  34.  
  35. EVENT time: 3337.380615, type: 2, fromlayer3 entity: B
  36. B: Received OK. seq num 1 -> 0.
  37.  
  38. EVENT time: 3345.409912, type: 2, fromlayer3 entity: A
  39. A: ACK OK. seq num 1 -> 0.
  40.  
  41. EVENT time: 5057.893555, type: 1, fromlayer5 entity: A
  42.  
  43. EVENT time: 5063.455078, type: 2, fromlayer3 entity: B
  44. B: Received OK. seq num 0 -> 1.
  45. TOLAYER3: packet being lost
  46.  
  47. EVENT time: 5077.893555, type: 0, timerinterrupt entity: A
  48. A: Timeout detected.
  49. A: Resending packet, attempt 1.
  50.  
  51. EVENT time: 5083.841309, type: 2, fromlayer3 entity: B
  52. B: Duplicate packet, resending ACK.
  53.  
  54. EVENT time: 5086.039063, type: 2, fromlayer3 entity: A
  55. A: ACK OK. seq num 0 -> 1.
  56.  
  57. EVENT time: 5746.330078, type: 1, fromlayer5 entity: A
  58.  
  59. EVENT time: 5747.367676, type: 1, fromlayer5 entity: A
  60. A: Packet is still enroute - ignoring layer5!
  61. EVENT time: 5750.909180, type: 2, fromlayer3 entity: B
  62. B: Received OK. seq num 1 -> 0.
  63. TOLAYER3: packet being corrupted
  64.  
  65. EVENT time: 5759.888184, type: 2, fromlayer3 entity: A
  66. A: Checksum failed (expected 569, got 648).
  67. A: Resending packet, attempt 1.
  68.  
  69. EVENT time: 5761.808105, type: 2, fromlayer3 entity: B
  70. B: Duplicate packet, resending ACK.
  71. TOLAYER3: packet being corrupted
  72.  
  73. EVENT time: 5771.442871, type: 2, fromlayer3 entity: A
  74. A: Checksum failed (expected 569, got 1000568).
  75. A: Resending packet, attempt 2.
  76.  
  77. EVENT time: 5777.524414, type: 2, fromlayer3 entity: B
  78. B: Duplicate packet, resending ACK.
  79.  
  80. EVENT time: 5782.076172, type: 2, fromlayer3 entity: A
  81. A: ACK OK. seq num 1 -> 0.
  82.  
  83. EVENT time: 6231.452148, type: 1, fromlayer5 entity: A
  84. TOLAYER3: packet being corrupted
  85.  
  86. EVENT time: 6239.164063, type: 2, fromlayer3 entity: B
  87. B: Checksum failed, dropping packet (expected 2080, got 2066).
  88.  
  89. EVENT time: 6244.859863, type: 2, fromlayer3 entity: A
  90. A: Got NAK.
  91. A: Resending packet, attempt 1.
  92.  
  93. EVENT time: 6252.713379, type: 2, fromlayer3 entity: B
  94. B: Received OK. seq num 0 -> 1.
  95.  
  96. EVENT time: 6255.239746, type: 2, fromlayer3 entity: A
  97. A: ACK OK. seq num 0 -> 1.
  98.  
  99. EVENT time: 6528.275391, type: 1, fromlayer5 entity: A
  100.  
  101. EVENT time: 6530.276367, type: 2, fromlayer3 entity: B
  102. B: Received OK. seq num 1 -> 0.
  103. TOLAYER3: packet being corrupted
  104.  
  105. EVENT time: 6536.289551, type: 2, fromlayer3 entity: A
  106. A: Checksum failed (expected 581, got 660).
  107. A: Resending packet, attempt 1.
  108.  
  109. EVENT time: 6540.485840, type: 2, fromlayer3 entity: B
  110. B: Duplicate packet, resending ACK.
  111. TOLAYER3: packet being lost
  112.  
  113. EVENT time: 6556.289551, type: 0, timerinterrupt entity: A
  114. A: Timeout detected.
  115. A: Resending packet, attempt 2.
  116. TOLAYER3: packet being lost
  117.  
  118. EVENT time: 6576.289551, type: 0, timerinterrupt entity: A
  119. A: Timeout detected.
  120. A: Resending packet, attempt 3.
  121.  
  122. EVENT time: 6577.833008, type: 2, fromlayer3 entity: B
  123. B: Duplicate packet, resending ACK.
  124.  
  125. EVENT time: 6581.622070, type: 2, fromlayer3 entity: A
  126. A: ACK OK. seq num 1 -> 0.
  127.  
  128. EVENT time: 8422.437500, type: 1, fromlayer5 entity: A
  129.  
  130. EVENT time: 8429.832031, type: 2, fromlayer3 entity: B
  131. B: Received OK. seq num 0 -> 1.
  132.  
  133. EVENT time: 8431.697266, type: 2, fromlayer3 entity: A
  134. A: ACK OK. seq num 0 -> 1.
  135.  
  136. EVENT time: 10136.235352, type: 1, fromlayer5 entity: A
  137.  
  138. EVENT time: 10140.147461, type: 2, fromlayer3 entity: B
  139. B: Received OK. seq num 1 -> 0.
  140.  
  141. EVENT time: 10144.671875, type: 2, fromlayer3 entity: A
  142. A: ACK OK. seq num 1 -> 0.
  143.  
  144. EVENT time: 10954.620117, type: 1, fromlayer5 entity: A
  145. TOLAYER3: packet being corrupted
  146.  
  147. EVENT time: 10963.281250, type: 2, fromlayer3 entity: B
  148. B: Checksum failed, dropping packet (expected 2160, got 2142).
  149.  
  150. EVENT time: 10970.300781, type: 2, fromlayer3 entity: A
  151. A: Got NAK.
  152. A: Resending packet, attempt 1.
  153.  
  154. EVENT time: 10972.086914, type: 2, fromlayer3 entity: B
  155. B: Received OK. seq num 0 -> 1.
  156.  
  157. EVENT time: 10977.523438, type: 2, fromlayer3 entity: A
  158. A: ACK OK. seq num 0 -> 1.
  159.  
  160. EVENT time: 12506.180664, type: 1, fromlayer5 entity: A
  161. TOLAYER3: packet being lost
  162.  
  163. EVENT time: 12526.180664, type: 0, timerinterrupt entity: A
  164. A: Timeout detected.
  165. A: Resending packet, attempt 1.
  166.  
  167. EVENT time: 12530.135742, type: 2, fromlayer3 entity: B
  168. B: Received OK. seq num 1 -> 0.
  169.  
  170. EVENT time: 12532.083008, type: 2, fromlayer3 entity: A
  171. A: ACK OK. seq num 1 -> 0.
  172.  
  173. EVENT time: 13012.666016, type: 1, fromlayer5 entity: A
  174. TOLAYER3: packet being lost
  175.  
  176. EVENT time: 13032.666016, type: 0, timerinterrupt entity: A
  177. A: Timeout detected.
  178. A: Resending packet, attempt 1.
  179. TOLAYER3: packet being corrupted
  180.  
  181. EVENT time: 13040.983398, type: 2, fromlayer3 entity: B
  182. B: Checksum failed, dropping packet (expected 2200, got 1002199).
  183. TOLAYER3: packet being lost
  184.  
  185. EVENT time: 13052.666016, type: 0, timerinterrupt entity: A
  186. A: Timeout detected.
  187. A: Resending packet, attempt 2.
  188.  
  189. EVENT time: 13056.750977, type: 2, fromlayer3 entity: B
  190. B: Received OK. seq num 0 -> 1.
  191.  
  192. EVENT time: 13057.762695, type: 2, fromlayer3 entity: A
  193. A: ACK OK. seq num 0 -> 1.
  194.  
  195. EVENT time: 14714.500000, type: 1, fromlayer5 entity: A
  196.  
  197. EVENT time: 14718.871094, type: 2, fromlayer3 entity: B
  198. B: Received OK. seq num 1 -> 0.
  199.  
  200. EVENT time: 14722.414063, type: 2, fromlayer3 entity: A
  201. A: ACK OK. seq num 1 -> 0.
  202.  
  203. EVENT time: 15531.602539, type: 1, fromlayer5 entity: A
  204. TOLAYER3: packet being corrupted
  205.  
  206. EVENT time: 15538.181641, type: 2, fromlayer3 entity: B
  207. B: Checksum failed, dropping packet (expected 2240, got 2218).
  208. TOLAYER3: packet being corrupted
  209.  
  210. EVENT time: 15542.797852, type: 2, fromlayer3 entity: A
  211. A: Checksum failed (expected 605, got 684).
  212. A: Resending packet, attempt 1.
  213.  
  214. EVENT time: 15544.162109, type: 2, fromlayer3 entity: B
  215. B: Received OK. seq num 0 -> 1.
  216.  
  217. EVENT time: 15548.698242, type: 2, fromlayer3 entity: A
  218. A: ACK OK. seq num 0 -> 1.
  219.  
  220. EVENT time: 17149.937500, type: 1, fromlayer5 entity: A
  221.  
  222. EVENT time: 17154.982422, type: 2, fromlayer3 entity: B
  223. B: Received OK. seq num 1 -> 0.
  224.  
  225. EVENT time: 17161.273438, type: 2, fromlayer3 entity: A
  226. A: ACK OK. seq num 1 -> 0.
  227.  
  228. EVENT time: 19084.382813, type: 1, fromlayer5 entity: A
  229.  
  230. EVENT time: 19088.869141, type: 2, fromlayer3 entity: B
  231. B: Received OK. seq num 0 -> 1.
  232.  
  233. EVENT time: 19096.300781, type: 2, fromlayer3 entity: A
  234. A: ACK OK. seq num 0 -> 1.
  235.  
  236. EVENT time: 20836.939453, type: 1, fromlayer5 entity: A
  237. TOLAYER3: packet being lost
  238.  
  239. EVENT time: 20856.939453, type: 0, timerinterrupt entity: A
  240. A: Timeout detected.
  241. A: Resending packet, attempt 1.
  242.  
  243. EVENT time: 20860.761719, type: 2, fromlayer3 entity: B
  244. B: Received OK. seq num 1 -> 0.
  245.  
  246. EVENT time: 20867.583984, type: 2, fromlayer3 entity: A
  247. A: ACK OK. seq num 1 -> 0.
  248.  
  249. EVENT time: 22299.386719, type: 1, fromlayer5 entity: A
  250. TOLAYER3: packet being lost
  251.  
  252. EVENT time: 22319.386719, type: 0, timerinterrupt entity: A
  253. Simulator terminated at time 22319.386719
  254. after sending 20 msgs from layer5
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