HP UX 11i v2 Networking Software manual Data Transfer Service, Message Flow Normal Data Transfer

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Introduction to DLPI

DLPI Services

Figure 1-18 Message Flow: DL_DISCONNECT Indication Arrives after DL_CONNECT Response is Sent

DL_CONNECT request

DL_DISCONNECT request

DL_OK acknowledge

DL_CONNECT indication

DL_CONNECT response

DL_OK acknowledge

DL_DISCONNECT

indication

Data Transfer Service

The connection-mode data transfer service provides for the exchange of user data in either direction or in both directions simultaneously between DLS users. Data is transmitted in logical groups called data link service data units (DLSDUs). The DLS provider preserves both the sequence and boundaries of DLSDUs as they are transmitted.

Normal data transfer is neither acknowledged nor confirmed. It is up to the DLS users, if they so choose, to implement a confirmation protocol.

Each DL_DATA_REQ primitive conveys a DLSDU from the local DLS user to the DLS provider. Similarly, each DL_DATA_IND primitive conveys a DLSDU from the DLS provider to the remote DLS user. The normal flow of messages is illustrated in Figure 1-19.

Figure 1-19 Message Flow: Normal Data Transfer

DL_DATA request

DL_DATA indication

Chapter 1

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Contents Edition Dlpi Programmer’s GuideLegal Notices Page Page Contents Contents Contents Sample Programs Printing History Page Appendix a Sample Programs PrefacePage Introduction to Dlpi Introduction to Dlpi HP Dlpi Features Header Files Device File FormatData Link Layer Service InterfaceDlpi Modes of Communication Connection-mode ServiceData Link Layer Connectionless-mode Service Dlpi AddressingPhysical Attachment Identification HP PPA Format HP’s Dlsap Address Format 802.3, Ethernet, Token Ring, Fddi Data Link User IdentificationHP’s Dlsap Address Format for Fibre Channel Dlsap Promiscuous Mode Clarifications Dlpi Services Dlhpppareq DlerrorackDlinforeq DlinfoackDlresetcon DlresetreqDlresetind DlresetresDlhprawdataind Local Management ServicesInformation Reporting Service DlhprawdatareqBind Service Attach ServiceBinding Reserved IEEESAPS/EthertypesSnap Message Flow Binding a Stream to a Dlsap Message Flow Enabling a Specific Multicast Address on a Connection Establishment Service Connection-mode Services 12 Message Flow Successful Connection Establishment Connection Handoff13 Message Flow Token Retrieval 16 Message Flow Both Primitives are Destroyed by Provider 19 Message Flow Normal Data Transfer Data Transfer Service20 Message Flow DLS User-Invoked Connection Release Connection Release ServiceReset Service 23 Message Flow DLS User-Invoked Connection Reset Connectionless Data Transfer Connectionless-mode ServicesError Reporting Service Raw-mode ServicesRaw-mode Data Transfer XID and Test ServiceXID and Test Packet Handling 31 Message Flow XID ServiceAn Example 32 Message Flow Test Service33 Message Flow a Connection-Mode Example Dlpi Primitives Dlpi Primitives PPA Initialization/De-initialization Local Management PrimitivesDlhpppareq Dlhpppaack Dlhpppaack MTU DlinforeqDlinfoack Dlmetro DlcsmacdDltpb DltprDlother DlcharDlctca DlfddiDlhprawdls DlacldlsDlunknown DLSTYLE2 DLSTYLE1Dlaccess DlattachreqDlbadppa Dldetachreq DloutstateDlsyserr Dlbindreq Dlbadaddr DlinitfailedDlnotinit Dlbindack Dlunbindreq Dlsubsbindreq Dlhierarchicalbind DlpeerbindDltoomany DlsubsbindackDlsubsunbindreq Dlenabmultireq Dlnotsupported DldisabmultireqDlnotenab DlpromisconreqDlpromiscphys DlpromiscsapDlpromiscmulti Dlpromiscoffreq Dlokack Dlerrorack Dlphysaddrreq Dlfactphysaddr Dlcurrphysaddr Dlphysaddrreq DlphysaddrackDlsetphysaddrreq DlphysaddrackDlsetphysaddrreq Dlgetstatisticsreq DlgetstatisticsreqDlgetstatisticsack DlbusyDlgetstatisticsack DlhpmulticastlistreqDlhpmulticastlistack Dlhpmulticastlistack Dlunitdatareq Connectionless-mode Service PrimitivesDlbaddata Dlunitdataind Dluderrorind Message is valid in state Dlidle Dlhprawdatareq Raw Mode Service PrimitivesDlbadprim DlhprawdataindRaw Mode Service Primitives Connection-mode Service Primitives Connection-Oriented Dlpi ExtensionsDlhpinforeq Dlhpinforeq DlhpinfoackDlhpinfoack Connection-mode Service Primitives Connection-mode Service Primitives Dlhpsetacktoreq DlhpsetacktoreqDlhpsetptoreq DlhpsetptoreqDlhpsetrejtoreq DlhpsetbusytoreqDlhpsetrejtoreq Dlhpsetbusytoreq DlhpsetsendacktoreqDlhpsetmaxretriesreq DlhpsetsendacktoreqDlhpsetmaxretriesreq DLOUTCONPENDING, Dlinconpending DlhpsetackthreshreqDlhpsetlocalwinreq Dlhpsetremotewinreq Dlhpsetremotewinreq DlhpclearstatsreqDlhpsetlocalbusyreq DlhpclearstatsreqDlhpsetlocalbusyreq Dlhpclearlocalbusyreq DlhpclearlocalbusyreqDlconnectreq Dlconnectind DlbadqosparamDlbadqostype 112 Dlconnectres 114 Dlpending DlconnectconDlbadtoken Dlbadcorr116 Dltokenack DltokenreqDldatareq Dldisconnectreq Dldataind120 Dldisconnectind Dlresetreq Dlresetind Dlresetres Dlresetcon 126 Dltestreq Primitives to Handle XID and Test OperationsDltestauto DltestindChapter 129 Dltestres Dltestcon Dlxidreq Dlxidauto Dlxidind134 Dlpollfinal DlxidresDlxidcon Chapter 137 Dlpi States Udqos Pend Dludqos User Reset DluserresetDlresetcon Prov Reset Dlprovreset Dlresetres ResetresDLDISCON11 DLDISCON9Pend Pending DlinconpendingChapter 141 142 Sample Programs Longareasize Connection ModeAppendix a 145 146 Appendix a 147 148 Appendix a 149 150 Appendix a 151 152 Appendix a 153 154 Appendix a 155 Snap SAP Connectionless ModeAppendix a 157 158 Appendix a 159 160 Appendix a 161 162 Appendix a 163 164 Appendix a 165 166 Raw Mode 168 Appendix a 169 170 Appendix a 171 Raw Mode 172 Connection establishment Glossary174 Glossary Index
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