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# MSN Messenger - Microsoft Network chat client
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# Pattern attributes: good slow notsofast
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# Protocol groups: chat proprietary
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# Wiki: http://www.protocolinfo.org/wiki/MSN_Messenger
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# Copyright (C) 2008 Matthew Strait, Ethan Sommer; See ../LICENSE
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#
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# Usually uses TCP port 1863
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# http://www.hypothetic.org/docs/msn/index.php
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# http://msnpiki.msnfanatic.com/
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#
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# This pattern has been tested and is believed to work well.
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msnmessenger
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# First branch: login
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# ver: allow versions up to 99.
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# I've never seen a cvr other than cvr0. Maybe this will be trouble later?
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# Can't anchor at the beginning because sometimes this is encapsulated in
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# HTTP. But either way, the first packet ends like this.
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# Second/Third branches: accepting/sending a message
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# I will assume that these can also be encapsulated in HTTP, although I have
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# not checked. Example of each direction:
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# ANS 1 quadong@hotmail.com 1139803431.29427 17522047
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# USR 1 quadong@hotmail.com 530423708.968145.366138
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# Branches are written entirely separately for better performance.
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ver [0-9]+ msnp[1-9][0-9]? [\x09-\x0d -~]*cvr0\x0d\x0a$|usr 1 [!-~]+ [0-9. ]+\x0d\x0a$|ans 1 [!-~]+ [0-9. ]+\x0d\x0a$
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