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Nov 14th, 2019
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  1.  
  2. //PACKET TCP/PACKET LEVEL TEST
  3. for (int i = 0; i < packetCount; i++) { //1 LOOP = 1 PACKET
  4. //packet transmitted cost = transmit cost and error check cost
  5. a2.pTotalCost += a2.pTransCost + a2.pCheckCost;
  6. float r;
  7.  
  8. //using frame error probability and frame count to find errors
  9. for (int i = 0; i < a2.packetSize; i++) {
  10. //probability failure check
  11. r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
  12.  
  13. //if a single frame has an error, we need to re-transmit entire packet
  14. //so the loop going through all frames in a packet will end
  15. if (r <= a2.errRate) {
  16. a2.errorCount++;
  17. //ending loop through 1 packet if an error is found
  18. i = a2.packetSize;
  19. }
  20.  
  21. }
  22.  
  23. //if single packet had an error, while-loop activates and tries to re-transmit and error check
  24. while (r <= a2.errRate) {
  25. //transmit packet again if it fails, and error check again
  26. a2.pTotalCost += a2.pTransCost + a2.pCheckCost;
  27.  
  28. //using probability for error in frames of failed packet
  29. for (int i = 0; i < a2.packetSize; i++) {
  30. r = static_cast <float> (rand()) / static_cast <float> (RAND_MAX);
  31.  
  32. if (r <= a2.errRate) {
  33. a2.errorCount++;
  34. //ending loop through 1 packet if an error is found
  35. //while-loop will activate again and try to re-transmit and error check
  36. i = a2.packetSize;
  37. }
  38.  
  39. }
  40. }
  41.  
  42. }
  43.  
  44. cout << "Number of Packets with Errors: " << a2.errorCount << endl;
  45. cout << "Total Cost of transmitting and error checking " << packetCount << " packets: " << a2.pTotalCost << endl;
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