Protocols/MSNP/Commands/CHL

CHL

The CHL command is an unsolicited command coming from the server which is used to verify that the client currently connected is an official client (MSN Messenger, Windows Live Messenger, etc.).

CHL TrID challengestring

• TrID: The Protocols/MSNP/TransactionID of the command. Always 0.
• challengestring: A string required for the response

A challenge must be replied to using the QRY command.

Challenge Response

The challenge system varies over different MSNP versions.

• For MSNP8, 9, and 10 see Protocols/MSNP/MSNP8/Challenges
• For MSNP11 and later, see Protocols/MSNP/MSNP11/Challenges
• MSNP13 and 14 uses updated keys, see Protocols/MSNP/MSNP13/Challenges
• MSNP15 on later uses updated keys, see Protocols/MSNP/MSNP15/Changes