MMSprotocol 微软MMS协议详解.docx

MMSprotocol 微软MMS协议详解.docx

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MMSprotocol微软MMS协议详解

MMSstreamingprotocolWebsitehttp:

//get.to/sdp

“puttingtheMMSjigsawpuzzletogetherpiecebypiece”

UPDATEHISTORY

Update31.10.02

NewMMScommand20toclient–commandadded.

Command01toclientupdated.

Command05toclientupdated.

Command07toserverupdated.

Command11toclientupdated.

Command15toserverupdated.

Update01.10.02

Command01toClient–structureupdated

Command02toServer–dataupdated

Command02toClient–dataupdated

Command05toClient–structureupdated

Command06toClient–dataaddedatend

Command07toServer–structureupdated

Command09toServer–dataupdated

Command0dtoServer–dataupdated

Command11toServer–dataupdated

Command1AtoServer–dataupdated

Section‘MMSPreHeaders’thewholesectionwasupdated,newdataadded

Section‘MMSCommandProtocolStateSequences’enddetailsupdated

Update30.09.02

Newsectionadded:

‘IEEE754-1985doubleprecisionvalues’

AllMMSfunctionsinthisdocumentusingthis8bytedoubleprecisionvaluehavebeenupdated,includingtheMMScommandheadersection.

Command05toClientupdated

Command06toClientupdated

Command07toServerupdated

Update12.09.02

Newsectionadded:

‘MMSflags’tohopefullyexplainfurtherhowtheywork.

Command01toserver–textchanged.

Command02toserverand02toclient–textchanged.

Command05toclient-basicstructurenowincluded.

Command06toclient–structureextended

Command11toclient–extrainfoadded,nowincludes‘packetpair’

Command18toserver-updated

Section‘MMScommandprotocolstatesequences’hasbeenupdated

Section‘MMSpre-headers’Newitem‘MMStimingpacketpairs’added

Section‘ASFUDP/TCPpacketre-syncronisation’updated.

Section‘Timecodes,mediapacketsandASFheadersforlivebroadcasts’extendedwithnewsummary.

Update20.06.02

Documenterrorcorrectioninsection:

‘MMSPreHeaders’subsection:

‘MMSHeaderPre-Headers’

Thelinedidread“notincludingthepreheaderfield”

Andhasbeencorrectedandnowreads“includingthepreheaderfieldlength”.

Update04.05.02

Newsectionadded‘MMSProxyServers’-anoverallexplanation.

Section‘KnownMMScommands’–ClienttoServercommand01updated

Section‘KnownMMScommands’–Anewcommandadded;servertoclient0A.

Update2404.02

Allreferencesto‘SessionID’havebeenreplacedwithanewvalue‘PacketIDType’

Update23.04.02

Section‘knownMMScommands’newdataaddedtocommand06toclient

Changemadetocommand07toserver（packetIDtype）

Changemadetocommand15toserver（packetIDtype）

Section‘Abouterrorcodes…’someinaccuratetexthasbeenremoved

Update22.04.02

Section‘knownMMScommands’newdataaddedtocommand01toclient

Section‘MMSpreheaders’Are-writetoexplainmoreclearlyhowtheywork

Section‘MMSstatesequences’hasbeencleanedup

Allsections–Fontupdatedtoshowhexcodesmoreclearly

Update20.04.02

Section‘ASFUDP/TCPpacketresynchronisation’theUDP‘beeffood’commandupdated

Section‘knownMMScommands’regardingcommand1Atoserver,updated

Section‘knownMMScommands’regardingcommand15toclient,updated

Update20.03.02

Section‘MMScommandprotocolstatesequences’-textadded

Section‘command05toserver’–updatedwithnewDRMinfo

Update13.03.02

Section‘command06toclient’-updatedwithnewinfo

Section‘command15toclient’-updatedwithnewinforegardingdatablocks

Section‘command18toserver’–updatedexplanation

Update01.03.02

Majornewsandupdatetodocument:

-MicroSofthasreleaseditsownASFv1.0specificationdocumentandisnowfreelyavailableattheirwebsite.Anditsabouttimetoo!

.Becauseofthisnewlyavailableinformation,thisMMSdocumentwillnowonlycontaininformationregardingMMSprotocolanddoesnotincludeASF1.0structures.Itsbeenalongtimecoming,thisinformationisabreakthroughintermsofwritingnewcodeusingASF1.0.ie.Codeusingwindowsmediaformat.

Section:

‘LetstalkaboutASFformat’hasbeenupdatedandallsectionsregardingASF1.0removed.

Section:

‘Yourpersonaldatasecurityflaw’hasbeenupdated.

Update18.01.02

Section‘ErrorcodesandCommandlevelprefix1”updatedwithanewCommandLevelvalue.

Prefix1datainsomeclienttoservercommandshasbeenupdatedwiththeCommandLevelvalue.

Section‘KnownMMSCommands’:

Moredataaddedtothe0x15clienttoservercommand.

Slightchangemadetocommand02clienttoserverextradatafield.

Slightchangemadetocommand05clienttoserverextradatafield.

Section‘TheMMScommandpacketheader’hasnewappendedtext.

Update15.01.02

NewAcknowledgmentssectionaddedattheend.

Section‘knownMMScommands’

Command1Apasswordencryptionexplained.

Command01toclient–moreinformationadded

Section‘KnownGUIDs’anewobjecthasbeenadded.

Update30.12.01

Section-‘KnownMMScommands’

Command1Abothserverandclientsent,updated.

Command01toserverand01toclientupdated

Command18toserverand15toclientupdated

Command06toclientupdated

Section–‘MMSCommandProtocolStateSequences’updated.

Update28.12.01

Section–‘knownMMScommands’:

-

01toclientchanged,

05toserverchanged,

15toclientre-writeandnewdata,

18toserverchanged.

Update12.12.01

Section–‘knownMMScommands’hasanewcommand‘0x1A’addedtothelist

Update07.12.01

Section-‘knownMMScommands’hasnewinformationoncommand15（toclient）added

Section-‘MMScommandstatesequences’hasbeenupdatedwithnewinformation

Newsection-‘ErrorCodes’hasbeenadded

Update29.11.01

Item–‘SomeknownGUIDsforobjects’hasbeenupdatedwithanewURLobject

Item–‘ASFHeaderObjects’hasbeenupdatedwithnewdata

Item–‘KnownMMSCommands’newdataaddedtocommand01toserver

update27.11.01

Thedocumenthasbeensignificantlyre-writtenandnowcombinescommandspecificdatawithMMScommands.TheresultisamorecleardescriptionofwhatisknownofMMScommandsandtheirinnerdataworkings.Therearedistinctpatternsnowstartingtoemergewithincommands.Theadditionof‘prefix’datashouldhelpdeveloperstowritecommandfunctions.Thisshouldbethewayforwardinthewaythisdocumentispresentedinthefuture.

Item–‘Thecommand06’hasbeenupdatedwithnewinformation

Item–‘CommandPackets’arenowreferredtoas‘CommandPacketheaders’

update18.11.01

Item-‘StreamBitRateSelectionObject’isnowStreamMBRobject-updated

ItemundertheASFHeaderobjectssection–‘FileObject’datahasbeenupdated

Othersmalltextchangesweremadeinthedocument,manlytoclearupafewpoints

update4.11.01

Section–‘KnownMMSCommands’thecommands0x0d,0x28and0x30mentioned.

Section–‘MMSpreHeaders’nowincludesnewdata

Section–‘MMScommandprotocolStateSequences’updated

Section–‘CommandSpecificData…’updated,are-writeforcommand0x07

update1.11.01

Section–‘ASFUDP/TCPpacketresynchronisation’hasbeentotallyre-writtenwithnewdata

Section–‘KnownMMScommands’,18and15updatedalittle

Section–‘Commandspecificdata’command07updated

Othersmallchangesmade

update28.10.01

Section‘ASFHeaderObjects’,anewstreamingbitrateobjecthasbeenadded,alsomoreupdatestotheexistingobjects.

Section‘SomeKnownGUIDs…’hasbeenupdatedwiththisnewobject

update27.10.01

Section–‘ASFHeaderObjects’,yetmoredataaddedregardingtitles,versionsandcodecs

update25.10.01

Section-‘ASFHeaderObjects’theTitle,VersionandCodecobjectshavebeenupdated

Section-‘Commandspecificdata…’sub-heading‘SwitchElementsorstreamIDs’hasbeenupdated

update24.10.01

Section–‘SomeknownGUIDs…’hasbeenupdatedwithnewGUIDobjects

Section–‘ASFheaderobjects’hasbeenupdatedwithsomenewobjectdata

Newitem–‘Yourpersonaldatasecurityflaw’

update10.10.01

Thecommandservertoclient06-newdatahasbeenentered.

Section:

‘Youcandownloadbroadbandmediafileswithanarrowbandmodem!

’hasbeenre-written

Section:

‘ASFPacketsynchronisation…’hasbeenupdatedandextended

Section:

‘Switch’ElementsorStreamIDvaluesincommandpacket’hasbeenupdated

Section‘MMSPre-Headers‘–hasnewdataadded

Section‘MMSCommandprotocolstatesequences’–asmalladjustmentmadeintext

update28.09.01

Section:

‘ASFHeaderobjectdata‘-FileObjecttablehasbeenupdatedwithnewdata.

Section:

‘TimeCodes,mediapacketsandASFheadersforLivebroadcasts’undersummaryhaschanged.

Section:

‘Notesregardingpacketlengthsanddatarates’hasbeenupdated.

AsectionshowingIPpacket,ASFpacketandsegmentrelationshiphasbeenadded.

>>>Startofhistory

Introwithbacktobasics

Therearetwotypesofcommonlyusedserver,bothcanhandlevideoandaudiomediatransmissionovertheinternet,butwithgoodandbadpointsforeach.

Theyare,StandardHostWebServersandStreamingMediaServers.

StandardhostserversuseabasicHTTPprotocolandarenormallyusedforholdingthingslikewebsites,FTPandemail.Streamingmediaserversarededicatedmediaserversandusetwopossibletypesofstreamingapplicationprotocol（asusedbyMicroSoft®）.ThoseareHTTPversion1.0or1.1andMMS（MultiMediaServer）protocol.NotethattheHTTPprotocolusedbystreamingserversisamodifiedversionofstandardwebserverHTTPprotocolandhasextendedpragmacommandstoallowrealtimestreaming.NormalHTTPdoesnotallowforthis.

Streamingmediaservershavedistinctdifferencescomparedtonormalhostwebservers.OnedifferenceisthatmediaplacedonanormalhostwebserverusingstandardHTTPprotocoldoesnotrequireaspecialserverorsoftwareforviewi