NS2网络模拟(2)-丢包率

1: #NS2_有线部分\LossRate.awk

2:

3: BEGIN {

4:     #Initialize the variable

5:     Lost = 0;      #the Sum of Lost packet

6:     Send = 0;      #the Sum of Send packet

7: }

8:

9: {

10: #Event Abbreviation Type Value

11: #%g %d %d %s %d %s %d %d.%d %d.%d %d %d

12: #Normal Event

13:         #r: Receive

14:         #d: Drop

15:         #e: Error

16:         #+: Enqueue

17:         #-: Dequeue

18: #double  Time

19: #int  (Link-layer) Source Node

20: #int  (Link-layer) Destination Node

21: #string  Packet Name

22: #int  Packet Size

23: #string  Flags

24: #int  Flow ID

25: #int  (Network-layer) Source Address

26: #int  Source Port

27: #int  (Network-layer) Destination Address

28: #int  Destination Port

29: #int  Sequence Number

30: #int  Unique Packet ID

31:

32:     #Evaluate the fields to new viariables

33:     EVENT       = $1;

34:     TIME        = $2;

35:     SRCNODE     = $3

36:     DSTNODE     = $4;

37:     PKTNAME     = $5;

38:     PKTSIZE     = $6;

39:     FLAGS       = $7;

40:     FLOWID      = $8;

41:     SRCADDPORT  = $9;

42:     DSTADDPORT  = $10;

43:     SEQNO       = $11;

44:     PKTID       = $12;

45:

46:     #Count up the packets send from n1

47:     if (EVENT == "+" && SRCNODE == 1 && DSTNODE == 0 && PKTNAME == "tcp")

48:         Send ++;

49:     #Count up the drop packet

50:     if (EVENT == "d" && SRCNODE == 0 && DSTNODE == 1 && PKTNAME == "ack")

51:         Lost ++;

52: }

53:

54: END {

55:     printf("TCP:number of packets send: %d lost: %d\n", Send, Lost);

56:     printf("TCP:the loss rate of packets: %.5f\n", Lost/Send);

57: }