Connectionless-mode Services | HP UX 11i v2 Networking Software

Introduction to DLPI

DLPI Services

Figure 1-25 Message Flow: DLS Provider-Invoked Connection Reset

DL_RESET indication

DL_RESET response

DL_OK acknowledge

DL_RESET indication

DL_RESET response

DL_OK acknowledge

Figure 1-26 illustrates the message ﬂow for a reset invoked simultaneously by one DLS user and the DLS provider.

Figure 1-26 Message Flow: Simultaneous DLS User & DLS Provider-Invoked Connection Reset

DL_RESET request

	DL_RESET
	indication
	DL_RESET
DL_RESET	response
confirm	DL_OK
	DL_OK
	acknowledge

Connectionless-mode Services

The connectionless-mode services enable a DLS user to transfer units of data to peer DLS users without incurring the overhead of establishing and releasing a connection. The connectionless service does not, however, guarantee reliable delivery of data units between peer DLS users (e.g. lack of ﬂow control may cause buffer resource shortages that result in data being discarded).

Once a stream has been initialized via the local management services, it may be used to send and retrieve connectionless data units.

Connectionless Data Transfer

The connectionless data transfer service provides for the exchange of user data (DLSDUs) in either direction or in both directions simultaneously without having to establish a data link connection. Data

Chapter 1

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HP UX 11i v2 Networking Software manual Connectionless-mode Services, Connectionless Data Transfer

Contents

Edition Dlpi Programmer’s Guide Legal 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 Format Data Link Layer Service Interface Dlpi Modes of Communication Connection-mode Service Data Link Layer Dlpi Addressing Connectionless-mode ServicePhysical Attachment Identiﬁcation HP PPA Format HP’s Dlsap Address Format 802.3, Ethernet, Token Ring, Fddi Data Link User Identiﬁcation HP’s Dlsap Address Format for Fibre Channel Dlsap Promiscuous Mode Clariﬁcations Dlpi Services Dlhpppareq DlerrorackDlinforeq Dlinfoack Dlresetcon DlresetreqDlresetind Dlresetres Dlhprawdataind Local Management ServicesInformation Reporting Service Dlhprawdatareq Bind Service Attach Service Reserved IEEESAPS/Ethertypes BindingSnap 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 Handoff 13 Message Flow Token Retrieval 16 Message Flow Both Primitives are Destroyed by Provider 19 Message Flow Normal Data Transfer Data Transfer Service 20 Message Flow DLS User-Invoked Connection Release Connection Release Service Reset Service 23 Message Flow DLS User-Invoked Connection Reset Connectionless Data Transfer Connectionless-mode Services Error Reporting Service Raw-mode Services Raw-mode Data Transfer XID and Test Service XID and Test Packet Handling 31 Message Flow XID Service An Example 32 Message Flow Test Service 33 Message Flow a Connection-Mode Example Dlpi Primitives Dlpi Primitives PPA Initialization/De-initialization Local Management Primitives Dlhpppareq Dlhpppaack Dlhpppaack MTU Dlinforeq Dlinfoack Dlmetro DlcsmacdDltpb Dltpr Dlother DlcharDlctca Dlfddi Dlacldls DlhprawdlsDlunknown DLSTYLE2 DLSTYLE1 Dlattachreq DlaccessDlbadppa Dloutstate DldetachreqDlsyserr Dlbindreq Dlinitfailed DlbadaddrDlnotinit Dlbindack Dlunbindreq Dlsubsbindreq Dlhierarchicalbind Dlpeerbind Dltoomany Dlsubsbindack Dlsubsunbindreq Dlenabmultireq Dlnotsupported Dldisabmultireq Dlnotenab Dlpromisconreq Dlpromiscsap DlpromiscphysDlpromiscmulti Dlpromiscoffreq Dlokack Dlerrorack Dlphysaddrreq Dlfactphysaddr Dlcurrphysaddr Dlphysaddrreq DlphysaddrackDlsetphysaddrreq Dlphysaddrack Dlsetphysaddrreq Dlgetstatisticsreq DlgetstatisticsreqDlgetstatisticsack Dlbusy Dlgetstatisticsack Dlhpmulticastlistreq Dlhpmulticastlistack Dlhpmulticastlistack Dlunitdatareq Connectionless-mode Service Primitives Dlbaddata Dlunitdataind Dluderrorind Message is valid in state Dlidle Dlhprawdatareq Raw Mode Service Primitives Dlbadprim Dlhprawdataind Raw Mode Service Primitives Connection-Oriented Dlpi Extensions Connection-mode Service PrimitivesDlhpinforeq Dlhpinforeq Dlhpinfoack Dlhpinfoack Connection-mode Service Primitives Connection-mode Service Primitives Dlhpsetacktoreq Dlhpsetacktoreq Dlhpsetptoreq Dlhpsetptoreq Dlhpsetbusytoreq DlhpsetrejtoreqDlhpsetrejtoreq Dlhpsetbusytoreq Dlhpsetsendacktoreq Dlhpsetsendacktoreq DlhpsetmaxretriesreqDlhpsetmaxretriesreq DLOUTCONPENDING, Dlinconpending Dlhpsetackthreshreq Dlhpsetlocalwinreq Dlhpsetremotewinreq Dlhpsetremotewinreq Dlhpclearstatsreq Dlhpclearstatsreq DlhpsetlocalbusyreqDlhpsetlocalbusyreq Dlhpclearlocalbusyreq Dlhpclearlocalbusyreq Dlconnectreq Dlbadqosparam DlconnectindDlbadqostype 112 Dlconnectres 114 Dlpending DlconnectconDlbadtoken Dlbadcorr 116 Dltokenack Dltokenreq Dldatareq Dldisconnectreq Dldataind 120 Dldisconnectind Dlresetreq Dlresetind Dlresetres Dlresetcon 126 Dltestreq Primitives to Handle XID and Test Operations Dltestauto Dltestind Chapter 129 Dltestres Dltestcon Dlxidreq Dlxidauto Dlxidind 134 Dlpollfinal Dlxidres Dlxidcon Chapter 137 Dlpi States Udqos Pend Dludqos User Reset DluserresetDlresetcon Prov Reset Dlprovreset Dlresetres Resetres DLDISCON11 DLDISCON9Pend Pending Dlinconpending Chapter 141 142 Sample Programs Longareasize Connection Mode Appendix 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 Mode 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 Connection establishment Glossary 174 Glossary Index