NDT-DEV email list created

Revision: 434
Author:   

Date:     Mon Aug  1 08:27:15 2011
Log:      Added Middlebox test description.
http://code.google.com/p/ndt/source/detail?r=434

Modified:
 /wiki/NDTProtocol.wiki

=======================================
--- /wiki/NDTProtocol.wiki      Mon Aug  1 07:20:47 2011
+++ /wiki/NDTProtocol.wiki      Mon Aug  1 08:27:15 2011
@@ -219,7 +219,7 @@
 NDTP-Tests currently defines the following types of tests:

 || *C constant name* || *Integer value* || *Description* ||
-|| TEST_MID || 1 (1L << 0) || Middlebox test - a short throughput S2C test  
with a limited CWND to check for a duplex mismatch condition ||
+|| TEST_MID || 1 (1L << 0) || Middlebox test - a short throughput S2C test  
with a limited CWND to check for a duplex mismatch condition. Moreover, it  
also checks the MSS value and does NAT detection ||
 || TEST_C2S || 2 (1L << 1) || C2S throughput test ||
 || TEST_S2C || 4 (1L << 2) || S2C throughput test ||
 || TEST_SFW || 8 (1L << 3) || Simple firewall test ||
@@ -233,6 +233,24 @@
 It is highly RECOMMENDED that all new clients support TEST_STATUS  
mechanism.

 === Middlebox test ===
+
+Middlebox test is a short throughput S2C test with a limited CWND to check  
for a duplex mismatch condition. Moreover, this test uses pre-defined MSS  
value to check if any intermediate node will modify its connection settings.
+
+==== MID protocol ====
+
+As a first step Server MUST bind new port and send TEST_PREPARE message  
containing this port number to Client. Port number must be encoded as  
string.
+
+Next, Client MUST connect to this newly bound port and start reading data  
from Server.
+
+Server SHOULD check MSS value and MUST start 5 seconds throughput test.  
When the test is over, Server MUST send its results encoded as strings in  
the TEST_MSG message to Client. These results have the following format:
+{{{
+ServerIP;ClientIP;CurMSS;WinScaleSent;WinScaleRecv
+}}}
+
+Next, Client MUST send to server its calculated throughput value encoded  
as string (float format) in the TEST_MSG message.
+
+At the end Server MUST close MID test session by sending an empty  
TEST_FINALIZE message.
+
 === Simple firewall test ===

 Simple firewall test tries to find out any firewalls between Client and  
Server that will prevent connections to ephemeral port numbers. Test is  
performed in both directions (i.e. Client is trying to connect to Server  
(c2s) and Server is trying to connect to Client (s2c)).