Table of Contents
Advertisement
8.4 Command Control via the Network (continued)
Automatic Connection Break
The TCP connection will be automatically disconnected after there is no
communication for 30 seconds after being established.
Authentication
The projector does not accept commands without authentication success
when authentication is enabled. The projector uses a challenge response type
authentication with an MD5 (Message Digest 5) algorithm.
When the projector is using a LAN, a random 8 bytes will be returned if
authentication is enabled. Bind this received 8 bytes and the Password and digest
this data with the MD5 algorithm and add this in front of the commands to send.
The following is a sample if the Password is set to "password" and the random 8
bytes are "a572f60c".
1) Connect the projector.
2) Receive the random 8 bytes "a572f60c" from the projector.
3) Bind the random 8 bytes "a572f60c" and the Password "password" and it
becomes "a572f60cpassword".
4) Digest this bind "a572f60cpassword" with MD5 algorithm.
It will be "e3d97429adffa11bce1f7275813d4bde".
5) Add this "e3d97429adffa11bce1f7275813d4bde" in front of the commands
and send the data.
Send "e3d97429adffa11bce1f7275813d4bde"+command.
6) When the sending data is correct, the command will be performed and the
reply data will be returned. Otherwise, an authentication error will be returned.
NOTE
• As for the transmission of the second or subsequent commands, the
authentication data can be omitted when the same connection.
109
8. Other Functions
QM00973-1
Advertisement
Table of Contents
