[ns]help! How to read this wireless tracefile.

[Xiaobing Fan <fanxiaob@cse.msu.edu>]

Dear all,

Below is a portion of my tracefile from a simple wireless simulation.
Could somebody please tell me where the packet identifier is? And what
do "RTR" "AGT" and "IFQ" represent? How do I derive the delay of one
certain packet from this?

Many Thanks!

Xiaobing

s 1.592955340 _0_ RTR  --- 37 tcp 1020 [0 0 0 0] ------- [0:0 1:0 32 1]
[22 0] 0 0
r 1.594245611 _0_ AGT  --- 34 ack 60 [a2 0 1 800] ------- [1:0 0:0 32 0]
[11 0] 1 0
s 1.594245611 _0_ AGT  --- 38 tcp 1000 [0 0 0 0] ------- [0:0 1:0 32 0]
[23 0] 0 0
r 1.594245611 _0_ RTR  --- 38 tcp 1000 [0 0 0 0] ------- [0:0 1:0 32 0]
[23 0] 0 0
s 1.594245611 _0_ RTR  --- 38 tcp 1020 [0 0 0 0] ------- [0:0 1:0 32 1]
[23 0] 0 0
s 1.594245611 _0_ AGT  --- 39 tcp 1000 [0 0 0 0] ------- [0:0 1:0 32 0]
[24 0] 0 0
r 1.594245611 _0_ RTR  --- 39 tcp 1000 [0 0 0 0] ------- [0:0 1:0 32 0]
[24 0] 0 0
s 1.594245611 _0_ RTR  --- 39 tcp 1020 [0 0 0 0] ------- [0:0 1:0 32 1]
[24 0] 0 0
D 1.594270611 _0_ IFQ  --- 39 tcp 1020 [0 1 0 800] ------- [0:0 1:0 32 1]
[24 0] 0 0
r 1.599415314 _1_ AGT  --- 24 tcp 1020 [a2 1 0 800] ------- [0:0 1:0 32 1]
[13 0] 1 0
s 1.599415314 _1_ AGT  --- 40 ack 40 [0 0 0 0] ------- [1:0 0:0 32 0] [13
0] 0 0
r 1.599415314 _1_ RTR  --- 40 ack 40 [0 0 0 0] ------- [1:0 0:0 32 0] [13
0] 0 0
s 1.599415314 _1_ RTR  --- 40 ack 60 [0 0 0 0] ------- [1:0 0:0 32 0] [13
0] 0 0
r 1.604345585 _1_ AGT  --- 25 tcp 1020 [a2 1 0 800] ------- [0:0 1:0 32 1]
[14 0] 1 0
s 1.604345585 _1_ AGT  --- 41 ack 40 [0 0 0 0] ------- [1:0 0:0 32 0] [14
0] 0 0
r 1.604345585 _1_ RTR  --- 41 ack 40 [0 0 0 0] ------- [1:0 0:0 32 0] [14
0] 0 0