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: }