Connection Handoff | HP UX 11i v2 Networking Software instruction

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.

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Chapter 1

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HP UX 11i v2 Networking Software manual Connection Handoff, Message Flow Successful Connection Establishment

Contents

Dlpi Programmer’s Guide Edition Legal 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 Files Service Interface Data Link Layer Dlpi Connection-mode Service Modes of Communication Data 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, Fddi HP’s Dlsap Address Format for Fibre Channel Dlsap Promiscuous Mode Clariﬁcations Dlpi Services Dlerrorack DlinforeqDlinfoack Dlhpppareq Dlresetreq DlresetindDlresetres Dlresetcon Local Management Services Information Reporting ServiceDlhprawdatareq Dlhprawdataind Attach Service Bind Service Binding 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 Service Connection Handoff 12 Message Flow Successful Connection Establishment 13 Message Flow Token Retrieval 16 Message Flow Both Primitives are Destroyed by Provider Data Transfer Service 19 Message Flow Normal Data Transfer Connection Release Service 20 Message Flow DLS User-Invoked Connection Release Reset Service 23 Message Flow DLS User-Invoked Connection Reset Connectionless-mode Services Connectionless Data Transfer Raw-mode Services Error Reporting Service XID and Test Service Raw-mode Data Transfer 31 Message Flow XID Service XID and Test Packet Handling 32 Message Flow Test Service An Example 33 Message Flow a Connection-Mode Example Dlpi Primitives Dlpi Primitives Local Management Primitives PPA Initialization/De-initialization Dlhpppareq Dlhpppaack Dlhpppaack Dlinforeq MTU Dlinfoack Dlcsmacd DltpbDltpr Dlmetro Dlchar DlctcaDlfddi Dlother Dlhprawdls DlacldlsDlunknown DLSTYLE1 DLSTYLE2 Dlaccess DlattachreqDlbadppa Dldetachreq DloutstateDlsyserr Dlbindreq Dlbadaddr DlinitfailedDlnotinit Dlbindack Dlunbindreq Dlsubsbindreq Dlpeerbind Dlhierarchicalbind Dlsubsbindack Dltoomany Dlsubsunbindreq Dlenabmultireq Dldisabmultireq Dlnotsupported Dlpromisconreq Dlnotenab Dlpromiscphys DlpromiscsapDlpromiscmulti Dlpromiscoffreq Dlokack Dlerrorack Dlphysaddrreq Dlfactphysaddr Dlcurrphysaddr Dlphysaddrack DlsetphysaddrreqDlphysaddrack Dlphysaddrreq Dlsetphysaddrreq Dlgetstatisticsreq DlgetstatisticsackDlbusy Dlgetstatisticsreq Dlhpmulticastlistreq Dlgetstatisticsack Dlhpmulticastlistack Dlhpmulticastlistack Connectionless-mode Service Primitives Dlunitdatareq Dlbaddata Dlunitdataind Dluderrorind Message is valid in state Dlidle Raw Mode Service Primitives Dlhprawdatareq Dlhprawdataind Dlbadprim Raw Mode Service Primitives Connection-mode Service Primitives Connection-Oriented Dlpi ExtensionsDlhpinforeq Dlhpinfoack Dlhpinforeq Dlhpinfoack Connection-mode Service Primitives Connection-mode Service Primitives Dlhpsetacktoreq Dlhpsetacktoreq Dlhpsetptoreq Dlhpsetptoreq Dlhpsetrejtoreq DlhpsetbusytoreqDlhpsetrejtoreq Dlhpsetsendacktoreq Dlhpsetbusytoreq Dlhpsetmaxretriesreq DlhpsetsendacktoreqDlhpsetmaxretriesreq Dlhpsetackthreshreq DLOUTCONPENDING, Dlinconpending Dlhpsetlocalwinreq Dlhpsetremotewinreq Dlhpclearstatsreq Dlhpsetremotewinreq Dlhpsetlocalbusyreq DlhpclearstatsreqDlhpsetlocalbusyreq Dlhpclearlocalbusyreq Dlhpclearlocalbusyreq Dlconnectreq Dlconnectind DlbadqosparamDlbadqostype 112 Dlconnectres 114 Dlconnectcon DlbadtokenDlbadcorr Dlpending 116 Dltokenreq Dltokenack Dldatareq Dldataind Dldisconnectreq 120 Dldisconnectind Dlresetreq Dlresetind Dlresetres Dlresetcon 126 Primitives to Handle XID and Test Operations Dltestreq Dltestind Dltestauto Chapter 129 Dltestres Dltestcon Dlxidreq Dlxidind Dlxidauto 134 Dlxidres Dlpollfinal Dlxidcon Chapter 137 Dlpi States User Reset Dluserreset Dlresetcon Prov Reset DlprovresetDlresetres Resetres Udqos Pend Dludqos DLDISCON9 Pend PendingDlinconpending DLDISCON11 Chapter 141 142 Sample Programs Connection Mode Longareasize Appendix 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 SAP Appendix 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 establishment 174 Glossary Index