1 # MSN Messenger - Microsoft Network chat client
2 # Pattern attributes: good slow notsofast
3 # Protocol groups: chat proprietary
4 # Wiki: http://www.protocolinfo.org/wiki/MSN_Messenger
6 # Usually uses TCP port 1863
7 # http://www.hypothetic.org/docs/msn/index.php
8 # http://msnpiki.msnfanatic.com/
10 # This pattern has been tested and is believed to work well.
15 # ver: allow versions up to 99.
16 # I've never seen a cvr other than cvr0. Maybe this will be trouble later?
17 # Can't anchor at the beginning because sometimes this is encapsulated in
18 # HTTP. But either way, the first packet ends like this.
19 # Second/Third branches: accepting/sending a message
20 # I will assume that these can also be encapsulated in HTTP, although I have
21 # not checked. Example of each direction:
22 # ANS 1 quadong@hotmail.com 1139803431.29427 17522047
23 # USR 1 quadong@hotmail.com 530423708.968145.366138
25 # Branches are written entirely separately for better performance.
26 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$