yellows111
f267b61dde
information for MSNP4 found: adds the client codebase parameter to SND and CVR (and an empty to CVQ, but that lasted all the way to MSNP7 lol, does that for MSNP3 fallback too which is kind of funny) 18 commands left.
3.8 KiB
Introduction
CVR is a command introduced with MSNP2.
It is a Notification Server and as of MSNP8 a Dispatch Server command, without either a request or response payload.
Sends the current client information and retrieves the latest avaliable version of the client. Related to CVQ.
Client/Request
CVR TrID locale system-type system-ver system-arch requesting-library client-version {client-identification} {user-handle}
Where locale is a 16-bit hexadecimally encoded LCID. 0x0409 is the LCID for English, United States.
Where system-type is a string that defines the operating system you are using, such as winnt.
Where system-ver is the major and minor version of the operating system, such as 5.1.
Where system-arch is the architecture of the processor that is used to run the client, usually i386.
Where requesting-library is the name of the library that requested this CVR, usually MSMSGS or MSNMSGR.
Where client-version is the current client's major, minor and patch version, should be in the format of "{M}M.m.pppp".
Where client-identification is the internal name of the codebase used to create requesting-library, usually MSMSGS or an empty parameter.
Included since MSNP4. Non-empty since MSNP8.
Where user-handle is the user's handle. Included since MSNP8.
Server/Response
CVR TrID recommended-version recommended-version-2 minimum-allowed-version download-url fallback-url
Where recommended-version is the current version of the client for this system.
Where recommended-version-2 is (usually) the same as recommended-version,
Could possibly be a maximum allowed version? (forced downgrade)
Where minimum-allowed-version is the lowest version the server considers "safe" to connect with.
If the client's client-version is lower than the server's minimum-allowed-version,
the client should automatically disconnect from the server,
and request an forced upgrade using the binary provided in download-url.
Where download-url is the file to download and open to update this client to recommended-version.
Where fallback-url is the URL the client opens if it failed to download download-url for any reason.
Examples
*NOTE: This has been line-breaked.
Lines beginning with .. are continuations of the previous line."
Post-login
C: CVR 1 0x0409 win 4.10 i386 MSMSGS 1.0.0863 MSMSGS
S: CVR 1 5.0.0537 5.0.0537 1.0.0863
.. http://download.microsoft.com/download/msnmessenger/install/5.0/w98nt42kmexp/en-us/setupdl.exe
.. http://messenger.microsoft.com
Client asks if user would like to update, and stays connected.
Pre-login
Since MSNP8.
C: CVR 2 0x0409 winnt 5.1 i386 MSNMSGR 6.0.0602 MSMSGS example@hotmail.com
S: CVR 2 7.0.0813 7.0.0813 6.2.0205
.. http://msgr.dlservice.microsoft.com/download/5/d/9/5d9bb5b2-49c7-4890-94ab-d1d5e44a0e6d/Install_MSN_Messenger.exe
.. http://messenger.msn.com
Client disconnects from server, since it sees that minimum-allowed is above it's client-version.
Invalid client identification or version
This response may or may not disconnect you.
C: CVR 3 0x0409 winnt 5.0 i386 MSNMSGR 99.9.9999 MSMSGS
S: 420 3
C: CVR 4 0x0409 winnt 5.0 i386 YCOMM 0.1.0023 MSMSGS
S: 420 4
Invalid language ID
C: CVR 5 0x1111 winnt 5.1 MSNMSGR 6.0.0602 MSMSGS example@hotmail.com
S: 710 5
Invalid CVR
C: CVR 6 spaghetti
S: 731 6
Server disconnects client.