MSNP4 is the third released version of the Mobile Status Notification Protocol. It was introduced officially in Client Version 2.1.1047. *No commands for any service were known to be introduced in this version* *No error codes were known to be introduced in this version* *No commands were known to be removed in this version* Known changes (from [MSNP3](msnp3.md)): * ? * ? * ? * Honestly, we don't know. * New fields in initial profile, probably. Don't know why else, not sure why it required it's own protocol version. (none are parsed by the client either) * Client 2.2.1053 according to whatsnew.asp has Kids Passport support. Probably a new initial profile field by then. (Client doesn't parse 923 yet either) Client-server communication example: ``` C: VER 1 MSNP4 MSNP3 CVR0 S: VER 1 MSNP4 C: INF 2 S: INF 2 MD5 C: USR 3 MD5 I example@hotmail.com S: XFR 3 NS 10.0.0.5:1863 0 ``` Client disconnects from server Client opens a connection to 10.0.0.5:1863 ``` C: VER 4 MSNP4 MSNP3 CVR0 S: VER 4 MSNP4 C: INF 5 S: INF 5 MD5 C: USR 6 MD5 I example@hotmail.com S: USR 6 MDS S prefix C: USR 7 MD5 S $md5(prefix + password) S: USR 7 OK example@hotmail.com example%20user S: MSG Hotmail Hotmail 367 MIME-Version: 1.0 Content-Type: text/x-msmsgsprofile; charset=UTF-8 LoginTime: 1726321960 EmailEnabled: 1 MemberIdHigh: 1 MemberIdLow: 2 lang_preference: 1033 PreferredEmail: example@hotmail.com country: US PostalCode: Gender: Kid: 0 Age: BDayPre: Birthday: Wallet: Flags: 1027 sid: 507 kv: 11 MSPAuth: AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA$$ C: SYN 8 5 S: SYN 8 5 C: CHG 9 NLN S: CHG 9 NLN C: OUT ``` Client disconnects from server ``` S: OUT ``` Server disconnects client