HP UX 11i v2 Networking Software manual Connection Handoff

Page 36

Introduction to DLPI

DLPI Services

Figure 1-12 Message Flow: Successful Connection Establishment

DL_CONNECT request

DL_CONNECT confirm

DL_CONNECT indication

DL_CONNECT response

DL_OK acknowledge

Once the connection is established, the DLS users may exchange user data using DL_DATA_REQ and DL_DATA_IND.

The DLS user may accept an incoming connect request on either the stream where the connect indication arrived or at an alternate, responding stream. The responding stream is indicated by a token in the DL_CONNECT_RES. This token is a value associated with the responding stream and is obtained by issuing a DL_TOKEN_REQ on that stream. The DLS provider responds to this request by generating a token for the stream and returning it to the DLS user in a DL_TOKEN_ACK.

Connection Handoff

Connections may be established on a stream other than that which received the DL_CONNECT_IND by passing a non-zero dl_resp_token in the DL_CONNECT_RES. The dl_resp_token value is obtained by doing a DL_TOKEN_REQ on the stream the connection is being passed to (the data stream). The DL_CONNECT_RES is done on the stream which received the DL_CONNECT_IND (the control stream). Both the control and data streams must be bound on the same local SAP. After the DL_CONNECT_RES, the control stream will be left in the INCON_PEND state if there are more outstanding connect indications; otherwise, it will be left in the IDLE state. The data stream will be in the DATAXFER state.

The normal sequence of messages for obtaining a token is illustrated in Figure 1-13.

36

Chapter 1

Image 36

Contents Dlpi Programmer’s Guide EditionLegal Notices Page Page Contents Contents Contents Sample Programs Printing History Page Preface Appendix a Sample ProgramsPage Introduction to Dlpi Introduction to Dlpi HP Dlpi Features Device File Format Header FilesService Interface Data Link LayerDlpi Connection-mode Service Modes of CommunicationData Link Layer Connectionless-mode Service Dlpi AddressingPhysical Attachment Identiﬁcation HP PPA Format Data Link User Identiﬁcation HP’s Dlsap Address Format 802.3, Ethernet, Token Ring, FddiHP’s Dlsap Address Format for Fibre Channel Dlsap Promiscuous Mode Clariﬁcations Dlpi Services Dlerrorack DlinforeqDlinfoack DlhpppareqDlresetreq DlresetindDlresetres DlresetconLocal Management Services Information Reporting ServiceDlhprawdatareq DlhprawdataindAttach Service Bind ServiceBinding Reserved IEEESAPS/EthertypesSnap Message Flow Binding a Stream to a Dlsap Message Flow Enabling a Speciﬁc Multicast Address on a Connection-mode Services Connection Establishment ServiceConnection Handoff 12 Message Flow Successful Connection Establishment13 Message Flow Token Retrieval 16 Message Flow Both Primitives are Destroyed by Provider Data Transfer Service 19 Message Flow Normal Data TransferConnection Release Service 20 Message Flow DLS User-Invoked Connection ReleaseReset Service 23 Message Flow DLS User-Invoked Connection Reset Connectionless-mode Services Connectionless Data TransferRaw-mode Services Error Reporting ServiceXID and Test Service Raw-mode Data Transfer31 Message Flow XID Service XID and Test Packet Handling32 Message Flow Test Service An Example33 Message Flow a Connection-Mode Example Dlpi Primitives Dlpi Primitives Local Management Primitives PPA Initialization/De-initializationDlhpppareq Dlhpppaack Dlhpppaack Dlinforeq MTUDlinfoack Dlcsmacd DltpbDltpr DlmetroDlchar DlctcaDlfddi DlotherDlhprawdls DlacldlsDlunknown DLSTYLE1 DLSTYLE2Dlaccess DlattachreqDlbadppa Dldetachreq DloutstateDlsyserr Dlbindreq Dlbadaddr DlinitfailedDlnotinit Dlbindack Dlunbindreq Dlsubsbindreq Dlpeerbind DlhierarchicalbindDlsubsbindack DltoomanyDlsubsunbindreq Dlenabmultireq Dldisabmultireq DlnotsupportedDlpromisconreq DlnotenabDlpromiscphys DlpromiscsapDlpromiscmulti Dlpromiscoffreq Dlokack Dlerrorack Dlphysaddrreq Dlfactphysaddr Dlcurrphysaddr Dlphysaddrack DlsetphysaddrreqDlphysaddrack DlphysaddrreqDlsetphysaddrreq Dlgetstatisticsreq DlgetstatisticsackDlbusy DlgetstatisticsreqDlhpmulticastlistreq DlgetstatisticsackDlhpmulticastlistack Dlhpmulticastlistack Connectionless-mode Service Primitives DlunitdatareqDlbaddata Dlunitdataind Dluderrorind Message is valid in state Dlidle Raw Mode Service Primitives DlhprawdatareqDlhprawdataind DlbadprimRaw Mode Service Primitives Connection-mode Service Primitives Connection-Oriented Dlpi ExtensionsDlhpinforeq Dlhpinfoack DlhpinforeqDlhpinfoack Connection-mode Service Primitives Connection-mode Service Primitives Dlhpsetacktoreq DlhpsetacktoreqDlhpsetptoreq DlhpsetptoreqDlhpsetrejtoreq DlhpsetbusytoreqDlhpsetrejtoreq Dlhpsetsendacktoreq DlhpsetbusytoreqDlhpsetmaxretriesreq DlhpsetsendacktoreqDlhpsetmaxretriesreq Dlhpsetackthreshreq DLOUTCONPENDING, DlinconpendingDlhpsetlocalwinreq Dlhpsetremotewinreq Dlhpclearstatsreq DlhpsetremotewinreqDlhpsetlocalbusyreq DlhpclearstatsreqDlhpsetlocalbusyreq Dlhpclearlocalbusyreq DlhpclearlocalbusyreqDlconnectreq Dlconnectind DlbadqosparamDlbadqostype 112 Dlconnectres 114 Dlconnectcon DlbadtokenDlbadcorr Dlpending116 Dltokenreq DltokenackDldatareq Dldataind Dldisconnectreq120 Dldisconnectind Dlresetreq Dlresetind Dlresetres Dlresetcon 126 Primitives to Handle XID and Test Operations DltestreqDltestind DltestautoChapter 129 Dltestres Dltestcon Dlxidreq Dlxidind Dlxidauto134 Dlxidres DlpollfinalDlxidcon Chapter 137 Dlpi States User Reset Dluserreset Dlresetcon Prov Reset DlprovresetDlresetres Resetres Udqos Pend DludqosDLDISCON9 Pend PendingDlinconpending DLDISCON11Chapter 141 142 Sample Programs Connection Mode LongareasizeAppendix a 145 146 Appendix a 147 148 Appendix a 149 150 Appendix a 151 152 Appendix a 153 154 Appendix a 155 Connectionless Mode Snap SAPAppendix 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 Glossary Connection establishment174 Glossary Index

Related manuals

Manual 94 pages 16.8 Kb

Manual 74 pages 39 Kb

Manual 236 pages 18.16 Kb

Manual 12 pages 39.66 Kb

Manual 28 pages 49.76 Kb