client's log
=============================
The Data packet # 85 (512 bytes) is recieved from the sever.
Sending Ack block # 85
The Data packet # 86 (512 bytes) is recieved from the sever.
Sending Ack block # 86
Invalid block number . Ending transcation
<:: TFTPClient ::> mode normal
	MODE = Normal
<:: TFTPClient ::> server localhost:6900
Host name is : localhost at port : 6900 .
<:: TFTPClient ::> get test.doc
The Data packet # 1 (512 bytes) is recieved from the sever.
Sending Ack block # 1
The Data packet # 2 (512 bytes) is recieved from the sever.
Sending Ack block # 2
.
.
.
The Data packet # 150 (512 bytes) is recieved from the sever.
Sending Ack block # 150
The Data packet # 151 (0 bytes) is recieved from the sever.
Sending Ack block # 151
The file has been read from the server.
<:: TFTPClient ::> 

error sim log
========================================================================
46.2: Relay[Client[51387]->Server[51390]]: Sending NORMAL ACK 85 to /127.0.0.1:51390
46.2: Relay[Server[51390]->Client[51387]]: Sending NORMAL DATA 86 to /127.0.0.1:51387
46.2: Relay[Client[51387]->Server[51390]]: Sending NORMAL ACK 86 to /127.0.0.1:51390
46.2: Relay[Server[51390]->Client[51387]]: Received DATA 87, MANGLEBLOCK
46.2: Relay[Server[51390]->Client[51387]]: Sending MANGLEBLOCK RAW PACKET to /127.0.0.1:51387
46.2: Relay[Client[51387]->Server[51390]]: Sending NORMAL ERROR 4 'Invalid Block number' to /127.0.0.1:51390
46.2: Session[Client[51387]<->Server[51390]]: Received ERROR, closing relays.
46.2: Relay[Client[51387]->Server[51390]]: Finished.
46.2: Relay[Server[51390]->Client[51387]]: Finished.


server's log 
========================================================================
04/04/08 12:31 AM :: RRQ from /127.0.0.1:51360 Started
04/04/08 12:31 AM :: Received ERROR 4Invalid Block number from /127.0.0.1:51360
04/04/08 12:31 AM :: Invalid Packet from /127.0.0.1:51360 Expected ACK, received ERROR
04/04/08 12:31 AM :: Unknown Error
04/04/08 12:31 AM :: RRQ from /127.0.0.1:51360 Completed