1.  ＃author souroot
2. : souroot@163.com
3. formular: (all the send packets in agents layer)
4.  #-(all the recieve packets in agents layer) as all the lost packets
5. {
6. send;
7. ;
8. }
9. {
10. if(($1)=="s" && ($4)=="AGT")
11. send++;
12. if(($1)=="r" && ($4)=="AGT")
13. ++;
14. }
15. {
16. "send is %d, recv is %d\n",send,recv;
17. "drop rate is %4f\n",(send-recv)/send;
18. }

$1代表第一列，$4代表第四列。BEGIN表示循环开始，END表示循环结束