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Matrix Connection Test
This is a command that can be run from the games console matrix_connectionTest to test the clients ability to connect to a server, it does a minimal amount to connect and then disconnect, this makes it a great first test for a server emu :>
This page will try to describe in detail what needs to be done to be able to have a server pass this test and makes a good place to start getting familiar with the networking protocol and see how the basics work.
Run matrix_connectionTest 127.0.0.1 in the games console to start the test connection to localhost 127.0.0.1, with out a server it will fail, but below is how it should look if there is a server running on 127.0.0.1:25000.
06:04 RAM:1675MB FPS:142 INFO RENDER >matrix_connectionTest 127.0.0.1
06:04 RAM:1675MB FPS:142 INFO RENDER matrix_connectionTest: Testing 1 hosts ...
06:04 RAM:1675MB FPS:142 DEBUG NETWORK GameServer socket 'matrix_connection_test' created.
06:04 RAM:1675MB FPS:142 INFO NETWORK GameSocket 'matrix_connection_test' connecting to 127.0.0.1:25000
06:04 RAM:1675MB FPS:142 DEBUG NETWORK Created Socket 3756
06:04 RAM:1675MB FPS:142 DEBUG NETWORK 'matrix_connection_test' Entering State Initializing(1)
06:04 RAM:1675MB FPS:142 DEBUG NETWORK Game socket 'matrix_connection_test' opened on port 63133
06:04 RAM:1675MB FPS:142 TRACE NETWORK matrix_connection_test Sent INIT (timeout=400, count=1)
06:04 RAM:1675MB FPS:142 DEBUG NETWORK 'matrix_connection_test' Entering State Transferring(2)
06:04 RAM:1675MB FPS:142 TRACE NETWORK matrix_connection_test Sent TRANSFER (timeout=800, count=1)
06:04 RAM:1675MB FPS:142 DEBUG NETWORK 'matrix_connection_test' Entering State Connecting(3)
06:04 RAM:1675MB FPS:142 TRACE NETWORK matrix_connection_test[1] Reliable Channel INIT (seqstart=1)
06:04 RAM:1675MB FPS:142 TRACE NETWORK matrix_connection_test[2] Reliable Channel INIT (seqstart=1)
06:04 RAM:1675MB FPS:142 TRACE NETWORK matrix_connection_test Sent CONNECT (timeout=800, count=2)
06:05 RAM:1675MB FPS:143 TRACE NETWORK matrix_connection_test Sent CONNECT (timeout=400, count=1)
06:05 RAM:1675MB FPS:143 DEBUG NETWORK 'matrix_connection_test' Entering State Connected(5)
06:05 RAM:1675MB FPS:143 DEBUG NETWORK Game socket 'matrix_connection_test' connected.
06:05 RAM:1675MB FPS:143 NOTCE GAME matrix_connectionTest: 127.0.0.1 SUCCESS
06:05 RAM:1675MB FPS:143 DEBUG NETWORK 'matrix_connection_test@63133->127.0.0.1:25000' Entering State Destroyed(8)
06:05 RAM:1675MB FPS:143 DEBUG NETWORK Game socket 'matrix_connection_test@63133->127.0.0.1:25000' closed by owner.
06:05 RAM:1675MB FPS:143 DEBUG NETWORK Closing socket 3756
06:05 RAM:1675MB FPS:143 DEBUG NETWORK 'matrix_connection_test@63133->127.0.0.1:25000' Entering State Closed(9)
06:05 RAM:1675MB FPS:143 TRACE NETWORK matrix_connection_test@63133->127.0.0.1:25000[1] Reliable Channel FINISH (recv_ack=1, send_ack=1)
06:05 RAM:1675MB FPS:143 TRACE NETWORK matrix_connection_test@63133->127.0.0.1:25000[2] Reliable Channel FINISH (recv_ack=0, send_ack=0)
06:05 RAM:1675MB FPS:143 DEBUG NETWORK GameServer socket 'matrix_connection_test@63133->127.0.0.1:25000' deleted.Here is a message by message walk through. C 🖥️ Means this message came from the client. S 🖧 Means this message came from the server.
Note: Every UDP packet to or from the server starts with a uint SocketID.
[uint] [char * 4] [uint]
SocketID MsgID Protocol Version
----------- ----------- -----------
00 00 00 00 50 4F 4B 45 00 04 5B A3
0 POKE 2740651008
The client send a POKE Jack message with the protocol version that it is using.
[uint] [char * 4] [uint]
SocketID MsgID Socket ID
----------- ----------- -----------
00 00 00 00 48 45 48 45 AE 75 EA 41
0 HEHE 1105884590
The server replies back to the port the POKE came from with a HEHE message with this connections assigned SocketID.
[uint] [char * 4] [uint] [ushort]
SocketID MsgID Socket ID Streaming Protocol Version
----------- ----------- ----------- -----
00 00 00 00 50 4F 4B 45 AE 75 EA 41 42 E2
0 KISS 1105884590 57922
The client says what Streaming protocol version it is using. And note that the socket id isn't set in the header as that would then miss identify this message as somethign other than a JACK message, it is added as part of the message instead.
[uint] [char * 4] [ushort] [ushort]
SocketID MsgID Game Server Port Sequence Start
----------- ----------- ----- -----
00 00 00 00 48 45 48 45 9B 0E D7 7E
0 HUGG 3739 32471
The last message in the handshake from the server gives the client a port to send the rest of its messages over and the sequence number it should use to start its message channels with. More on that in the Sequence number page. (TODO: link to page)
The rest of these messages are sent to the port given in the HUGG message
Note: If the SocketID isn't 0 then what follows is a byte buffer of X game packets, the start of each of these packets is a common two byte header of the form.
[2bits] [2bits] [1bit] [11bits]
Channel Resend Count Is Splitted Length
There is a better and more indepth explanation of this header in the protocol overview page.
[uint] [ushort] [byte] [long]
SocketID Packet Header MessageID ClientUnixTime
----------- ----- -- -----------------------
AE 75 EA 41 00 0B 04 58 29 D4 B7 0B 00 00 00
1105884590 *See below* 4 50328775000
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 11
This is the client sending a request to the server with its time as a micro second unix epoch. This is used as the connections heartbeat and is periodically.
[uint] [ushort] [byte] [long] [long]
SocketID Packet Header MessageID ClientUnixTime ServerUnixTime
----------- ----- -- ----------------------- -----------------------
AE 75 EA 41 00 13 05 58 29 D4 B7 0B 00 00 00 EB FA 0A 0A 49 28 05 00
1105884590 *See below* 5 50328775000 1451669049768683
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 19
The reply to the clients request, it send back the client time that was given in the request as well as the servers time.
[uint] [ushort] [byte] [long]
SocketID Packet Header MessageID ClientUnixTime
----------- ----- -- -----------------------
AE 75 EA 41 00 0B 04 E0 89 D4 B7 0B 00 00 00
1105884590 *See below* 4 50328812000
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 11
Another time sync request. Note: Perhaps its one per reliable channel (Channel 1 and 2) ?
[uint] [ushort] [byte] [long] [long]
SocketID Packet Header MessageID ClientUnixTime ServerUnixTime
----------- ----- -- ----------------------- -----------------------
AE 75 EA 41 00 13 05 E0 89 D4 B7 0B 00 00 00 E2 7F 0B 0A 49 28 05 00
1105884590 *See below* 5 50328812000 1451669049768683
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 19
The reply for the second time sync request.
[uint] [ushort] [ushort] [byte] [byte x 26]
SocketID Packet Header Sequence Num MessageID Unkown
----------- ----- ----- -- -----------------------------------------------------------------------------
AE 75 EA 41 40 1F 9B 0E 11 00 4D 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
1105884590 *See below* 3739 17
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
1 0 False 31
Don't really know much about this form of the login packet for the connection test.
[uint] [ushort] [byte] [ushort] [ushort]
SocketID Packet Header MessageID Sequence Num ACK For
----------- ----- -- ----- -----
AE 75 EA 41 00 07 02 9B 0F 9B 0E
1105884590 *See below* 2 3995 3739
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 7
An ack for a message on the matrix channel that had the sequence number 3739 and that was the last Login packet.
[uint] [ushort] [ushort] [byte] [byte x 10]
SocketID Packet Header Sequence Num MessageID Unknown
----------- ----- ----- ----- --------------------------------
AE 75 EA 41 40 0F 9B 0E 22 22 00 00 00 00 00 00 00 00 00 00
1105884590 *See below* 3739 34
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
1 0 False 15
[uint] [ushort] [byte] [ushort] [ushort]
SocketID Packet Header MessageID Sequence Num ACK For
----------- ----- -- ----- -----
AE 75 EA 41 00 07 02 9B 0F 9B 0E
1105884590 *See below* 2 3995 3739
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 7
[uint] [ushort] [byte x 5]
SocketID Packet Header Zeros
----------- ----- -----
AE 75 EA 41 00 07 00 00 00 00 00
1105884590 *See below*
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 15
[uint] [ushort] [byte x 5]
SocketID Packet Header Zeros
----------- ----- -----
AE 75 EA 41 00 07 00 00 00 00 00
1105884590 *See below*
Packet header expanded
00 0B
[2bits] [2bits] [1bit] [11bits]
--------- ------------ ------------ ------------
Channel Resend Count Is Splitted Length
0 0 False 15
And that its, that whats needed to complete the connection test. So if you implement a server that passes this, then I guess you have a server emulator, just prob not the most interesting one :>