微软RNDIS协议.docx

微软RNDIS协议.docx

《微软RNDIS协议.docx》由会员分享，可在线阅读，更多相关《微软RNDIS协议.docx（50页珍藏版）》请在冰豆网上搜索。

微软RNDIS协议

RemoteNDISSpecification

Rev1.1

August9,2002

©1998-2001MicrosoftCorporation.Allrightsreserved.

1Introduction

2

RemoteNDISisabus-independentclassspecificationforEthernet（802.3）networkdevicesondynamicPnPbussessuchasUSB,1394,BlueTooth,andInfiniBand.Thisspecificationdefinesabus-independentmessageprotocolbetweenahostPCandaRemoteNDISdeviceoverabstractcontrolanddatachannels.Alsoincludedarebus-mappingchapterswhichdefinespecificfeaturesofthespecificationontherespectivebusses.

The“legacy-free”PCrevolutioniseliminatingnotonlylegacyconnectionports（e.g.serial,parallel,PS/2）butalsolegacyexpansionbuseslikeISAandPCIinmainstreamPCs.Theresulting“sealedcase”PCswillrequireeitherbuilt-innetworkingsupportonthemotherboardorsupportfornetworkadaptersonexternalbusses.Thisspecificationdefinesamessageprotocolforexternalbusattachednetworkdevices.Itispreciseenoughtoallowvendor-independentclassdriversupportforRemoteNDISdevicesonthehostPC.

RemoteNDISisafairlysimpleextensionofthewell-understoodandtime-testedNDISarchitecture.NDISdefinesafunction-callinterfacefordevice-specificNDISminiportdrivers.Thisinterfacedefinesprimitivestosendandreceivenetworkdata,andtoqueryandsetconfigurationparametersandstatistics.RemoteNDISleveragesNDISbydefiningamessagewrappingfortheNDISminiportinterface,thusmovingtheNDIS-handlingcodefromaminiportdriverintothedeviceitself.Inthisandotherways,theRemoteNDISspecificationallowsforawiderangeofdevicefunctionalityandperformancelevels.

2.1LicenseAgreement

2.2

TheRemoteNDISSpecificationandanyaccompanyingmaterials（the“Specification”）providedbyMicrosoftisforyourpersonaluseonly,andmaybeusedsolelyforthepurposeofimplementingtheRemoteNDISprotocolmessagesettointerfacewith（i）aMicrosoftWindowsoperatingsystemor（ii）abusornetwork-connectedcommunicationsdevice,suchasaUSB,1394orTCP/IPdevice.THESPECIFICATIONMAYNOTBECOPIEDORDISTRIBUTED.

Microsoftmayhavecopyrights,patentsorpendingpatentapplicationscoveringsubjectmatterintheSpecification.TotheextentMicrosofthassuchcopyrights,patentsorapplications,Microsoftagreestograntanonexclusive,royalty-free,world-widelicenseunderthesecopyrights,patentsorapplicationssolelytoimplementtheRemoteNDISSpecificationtointerfacewith（i）aMicrosoftWindowsoperatingsystemor（ii）abusornetwork-connectedcommunicationsdevice,suchasaUSB,1394orTCP/IPdevice,onconditionthatyouagreenottoassertanyintellectualpropertyrightsagainstMicrosoftorothercompaniesfortheirimplementationoftheSpecification.MicrosoftreservesallotherrightsitmayhaveintheSpecification.ThefurnishingofthisdocumentdoesnotgiveyouanylicensetoanyotherMicrosoftpatents,trademarks,copyrights,orotherintellectualpropertyrights.Specifically,neitherthisdocumentnortheSpecificationgiveyouanylicensetotheNDISSpecificationortoUSBCommunicationDeviceClasstechnology.

TheSpecificationisprovided"ASIS"withoutwarrantyofanykind.Tothemaximumextentpermittedbyapplicablelaw,Microsoftfurtherdisclaimsallwarranties,includingwithoutlimitationanyimpliedwarrantiesofmerchantabilityandfitnessforaparticularpurpose,aswellaswarrantiesoftitleandnoninfringement.TheentireriskarisingoutoftheuseorperformanceoftheSpecificationremainswithyou.

Tothemaximumextentpermittedbyapplicablelaw,innoeventshallMicrosoftoritssuppliersbeliableforanyconsequential,incidental,direct,indirect,special,punitive,orotherdamageswhatsoever（including,withoutlimitation,damagesforlossofbusinessprofits,businessinterruption,lossofbusinessinformation,orotherpecuniaryloss）arisingoutoftheuseoforinabilitytousetheSpecification,evenifMicrosofthasbeenadvisedofthepossibilityofsuchdamages.Becausesomestates/jurisdictionsdonotallowtheexclusionorlimitationofliabilityforconsequentialorincidentaldamages,theabovelimitationmaynotapplytoyou.

3ConceptsandDefinitions

4

Thissectiondiscussesrequirementsandcharacteristicsofthechannelsusedtocommunicatebetweenthehostandtheremotedevice.Devicestatetransitionsandmajoroperationssuchasinitialization,haltandresetarealsodefinedhere.

4.1Controlchannel

4.2

Thespecificsofthecontrolchannelaregivenintheappropriatebus-mappingchapter.Thecontrolchannelmustbereliableandensuresequenceddelivery.Itisusedforallcommunicationexceptforthetransmissionofnetworkdatapackets.AllrequiredcontrolmessagesexceptREMOTE_NDIS_HALTandREMOTE_NDIS_INDICATE_STATUS_MSGarerequest/responseexchangesinitiatedbythehost.ThedevicemustrespondwithintheControlTimeoutPeriodasspecifiedintheappropriatebus-mappingchapter.

4.3Datachannel

4.4

Thespecificsofthedatachannelaregivenintheappropriatebus-mappingchapter.Thedatachannelisusedexclusivelyforthetransmissionofnetworkdatapackets.Itmayconsistofmultiplesub-channels（e.g.forvaryingqualityofservice）asdefinedintheappropriatebus-mappingchapter.Thereliabilityanddeliveryspecificsofthedatachannelarelikewisedefinedintherespectivebus-mappingchapter.

4.5InitializationandTeardown

4.6

Thecontrolanddatachannelsareinitializedasspecifiedintherespectivebus-mappingchapter.ThehostandRemoteNDISdevicethenexchangeinitializationmessages.ThehostsendsREMOTE_NDIS_INITIALIZE_MSGtothedevice,andthedeviceprovidesinformationaboutitstype,supportedmediumandversionintheresponsemessageREMOTE_NDIS_INITIALIZE_CMPLT.

EitherthehostortheremotedevicecanhaltthenetworkconnectioninanabortivefashionviatheREMOTE_NDIS_HALT_MSGmessage.Alloutstandingrequestsandpacketsshouldbediscardedonreceiptofthismessage.

4.7DeviceStateDefinitions

4.8

Followingbus-levelinitialization,thedeviceisintherndis-uninitializedstate.UponreceivingREMOTE_NDIS_INITIALIZE_MSGandreturningREMOTE_NDIS_INITIALIZE_CMPLTwithstatussuccess,thedeviceenterstherndis-initializedstate.

UponreceivingREMOTE_NDIS_SET_MSGfortheOID_GEN_CURRENT_PACKET_FILTERparameterwithanon-zerofilter,thedeviceenterstherndis-data-initializedstate.Whenintherndis-data-initializedstate,receivingREMOTE_NDIS_SET_MSGforOID_GEN_CURRENT_PACKET_FILTERwithazerofiltervalueforcesthedevicebackintotherndis-initializedstate.

ReceivingREMOTE_NDIS_HALT_MSGorabus-leveldisconnectorhard-resetatanytimeforcesthedeviceintotherndis-uninitializedstate.

4.8.1Halt

4.8.2

Atanytimethatthedeviceisintherndis-initializedorrndis-data-initializedstate,thehostcomputermayterminatetheRemoteNDISfunctionalityofthedeviceinanabortivefashionbysendingREMOTE_NDIS_HALT_MSGtothedevice.

4.8.3Reset

4.8.4

Thecommunicationchannelis“soft-reset”whenanerrorsuchasmessagetimeoutoccurs.Thehostmayinitiateasoft-resetatanytimewhenthedeviceisintherndis_initializedstatebysendingREMOTE_NDIS_RESET_MSGtothedevice（seedetailsbelow）;andthedevicemustsendaresponsemessagewhenithascompletedthereset.Forexample,thehostmayinitiateasoft-resetwhenanerror,suchasamessagetimeouthasoccurred.

Notethatthisisasoftresetinthesensethatanyhandles（e.g.VCsforconnection-orienteddevices）continuetobevalidafterthereset.TheRemoteNDISdevice,aspartoftheresetprocess,discardsalloutstandingrequestsandpackets.Theremotedevicemayresetsomeofitshardwarecomponents,butkeepsallcommunicationchannelstothehostintact.

4.8.4.1HardReset

4.8.4.2

IftheRemoteNDISdeviceperformsahardreset（i.e.reboot）,thiseventisassumedtobeequivalentof“Remove”followedby“Add”plug-and-playevents.ThehostNDISmini-portwillbehaltedandremoved,andanewinstancewillbeaddedandstarted.Allbus-levelandRemoteNDISinitializationwillbere-executed.ARemoteNDISdevicemayhard-resetitselfintheeventofacriticaldevicefailure.

4.9FlowControl

4.10

TheRemoteNDISdevicemayneedtoexerciseflowcontroltopreventthehostfromoverflowingitsdatabufferswithpackets.Anyflowcontrolprovisionsorrequirementsaregivenintherespectivebus-mappingchapter.

4.11ByteOrdering

4.12

Allnumericvaluesinmessagefieldsdefinedbythisspecificationareassumedtobecodedinlittle-endianformat,i.e.leastsignificantbytefirst.

4.13Encapsulation

4.14

ThissectiondoesnotspecifythewayNDISmessagesareencapsulatedinnativebusmessagesorprimitives.Pleaserefertotheappropriatebus-mappingchapterformoredetails.

4.15RemoteNDISVersion

4.16

Table21definestheRemoteNDISprotocolversionidentifiersexchangedbetweenhostanddevice.

Notethattheseareunrelatedtotherevisionnumberofthisspecification.

Table21:

RemoteNDISProtocolVersion

VersionIdentifier

Value

Description

RNDIS_MAJOR_VERSION

1

RemoteNDISMajorVersionspecifiedinthisdocument.

RNDIS_MINOR_VERSION

0

RemoteNDISMinorVersionspecifiedinthisdocument.

4.17StatusValues

4.18

TheRemoteNDISstatusvaluesaregenerallyequivalenttothe32-bitstatusvaluesdefinedintheWindows2000DDK.Specifically,highbitsetindicatesanerrorstateandthehighbitclearindicatesasuccessstate.ThespecificRemoteNDISstatusvaluesusedinthisspecificationarelistedbelow,otherscanbeinferredfromtheWindows2000DDKorMSDN.AdevicemayreturnanysemanticallycorrectRemoteNDISstatusva