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Apple Network Setup manual The maximum amount of data that packets of this protocol

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C H A P T E R 4

Network Setup Protocol Structures and Data Types

fTSDUSize	The maximum amount of data that packets of this protocol
	can carry. Must be 586, which is the basic AppleTalk
	datagram size.
fLoadType	Whether AppleTalk is active. See discussion below for
	possible values.
fNode	Most recently acquired node number or the ﬁxed node
	number to use.
fNetwork	Most recently acquired network number or the ﬁxed
	network number.
fRTMPRequestLimit	Must be 3. This ﬁeld is ignored by current versions of Open
	Transport.

fRTMPRequestInterval

The request interval in milliseconds. This ﬁeld must be 200.

This ﬁeld is ignored by current versions of Open Transport.

fAddressGenLimit Address generation limit. The default is 250.

fBRCAgingInterval The Best Routing Cache (BRC) aging interval in milliseconds. This ﬁeld must be 4000. This ﬁeld is ignored by current versions of Open Transport.

fRTMPAgingInterval The Router Table Maintenance Protocol (RTMP) aging interval in milliseconds. This ﬁeld must be 5000. This ﬁeld is ignored by current versions of Open Transport.

fMaxAddrTries The maximum number of retries that OT makes when trying to acquire an address. The default is 4096.

fDefaultChecksum When set to TRUE, a checksum is performed on the DDP packet. When set to FALSE, no checksum is performed. The default is FALSE.

fIsFixedNode Set to TRUE when ﬁxed node and network numbers are being used. The default value is FALSE.

fMyZone

The most recently acquired zone.

For a detailed description of DDP, see Inside Macintosh: Networking with Open Transport and Inside AppleTalk, Second edition.

The value of the fLoadType ﬁeld controls whether AppleTalk is active. The original deﬁnition of this ﬁeld was as an inactivity timeout (in minutes), similar to the inactivity timeout implemented for TCP/IP in current versions of Open Transport.

Before Open Transport 1.0 was released, it was realized that loading and unloading AppleTalk on demand was not possible, so the fLoadType ﬁeld was

152Protocol Structures

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Apple Network Setup manual The maximum amount of data that packets of this protocol

Contents

I N S I D E M A C I N T O S H Network Setup Apple Computer, Inc 2000 Apple Computer, Inc. All rights reserved Contents About Network SetupUsing Network Setup About This ManualNetwork Setup Reference ChapterChapter 4 Network Setup Protocol Structures and Data Types Glossary IndexPage About Network Setup Using Network SetupFigures, Tables, and Listings ChapterPage About This Manual Conventions Used in This ManualFor More Information Inside AppleTalk, Second EditionInside Macintosh Networking with Open Transport Open Transport Advanced Client Programming, available atAbout Network Setup Network Setup ArchitectureThe architecture shown in Figure 1-1 had a number of drawbacks The following key points are to be taken from Figure Inside the Network Setup Library About Network Setup Figure 1-4 Structure of the Network Setup Library Inside the Network Setup LibraryHigh-level framework Mid-level database OTCfgNetwork Setup Database Fundamentals Database StructureDatabase Structure Example About Network Setup Figure 1-5 Sample organization of the default area18 Network Setup Database Fundamentals LocalTalk for Printer AppleTalk networkork protocol entityDatabase Operations Figure 1-6 shows this process diagrammatically Legacy Issues Preference CoherencyLegacy Synchronization Algorithm Mac OS version Network Setup Version HistoryVersion C H A P T E R About Network Setup24 Network Setup Version History Opening the Database for Reading Using Network SetupOpening and Closing the Network Setup Database 26 Opening and Closing the Network Setup Database Opening the Database for WritingUsing Network Setup Listing 2-1 Opening the database for reading Listing 2-2 Opening the database for writing Using Network SetupOpening and Closing the Network Setup Database Closing the Database After Reading Closing the Database After WritingUsing Network Setup Opening and Closing the Network Setup DatabaseListing 2-4 Closing the database after writing err = OTCfgCommitAreaModificationsdbRef, readArea, writeAreaWorking with Entities Listing All EntitieskCfgClassAnyEntity and kCfgTypeAnyEntity, respectively static OSStatus MyGetEntitiesListCfgDatabaseRef dbRef, CfgAreaID areaOSType entityClass OSType entityType CfgEntityRef **entityRefs CfgEntityInfo **entityInfosUsing Network Setup 32 Working with EntitiesThe next routine, shown in Listing 2-6, opens the database for reading, gets the entity references for all of the TCP/IP network connection entities in the default area using the MyGetEntitiesList routine in Listing 2-5, and prints their user-visible names. This routine calls a routine, MyGetEntityUserVisibleName, which hasn’t been documented yet. It is shown in Listing 2-9 in the section “Reading and Writing Preferences” page Reading and Writing Preferences Finding an Active EntityReading Fixed-size Preferences Using Network SetupListing 2-7 Reading a ﬁxed-size preference Reading and Writing PreferencesThe sample shown in Listing 2-7, which opens and closes the entity before reading each preference, is implemented in an inefﬁcient manner for the sake of clarity. If you are reading multiple preferences, it is more efﬁcient to open the entity once. Then read the preferences by calling OTCfgGetPrefs or OTCfgSetPrefs multiple times and close the entity when you’re done Reading Variable-size Preferences assertdbRef != nil assertentity != nil assertname != nilUsing Network Setup 38 Reading and Writing PreferencesWriting Preferences Iterating the Preferences in an Entity Using Network Setup Reading and Writing PreferencesWorking with Sets Finding the Active Set Entity The MyFindActiveSet routine in Listing 2-13 implements the ﬁrst two steps. It starts by getting a list of all of the set entities by calling the MyGetEntitiesList routine Listing 2-5. Then MyFindActiveSet iterates through all of the set entities, reading the kOTCfgSetsStructPref preference of each set entity. That preference maps to the CfgSetsStruct structure, which contains an fFlags member. One bit of the fFlags member, kOTCfgSetsFlagActiveMask, indicates whether this set entity is the active set entity. If it is, the routine breaks out of the loop and returns the set’s entity reference to the caller breaks out of the loop and returns the found entity 46 Working with Sets Using Network SetupListing 2-14 Finding the active entity of a given class and type Working with Sets Using Network SetupListing 2-15 Finding the active TCP/IP entity Areas and Sets Protocol-speciﬁc Topics TCP/IP Notesaccess the preference in its packed format cursor = UInt8 * packedPref Using Network SetupProtocol-speciﬁc Topics UInt8 *cursor Using Network Setup52 Protocol-speciﬁc Topics Remote Access Notes Modem Notes OTCfgRemoteClientLocks pageStoring Third-party Preferences in Apple Entities Network Setup and Third-party Protocol StacksNotes for Third Parties C H A P T E R Using Network Setup56 Notes for Third Parties Opening and Closing the Network Setup Database Network Setup ReferenceNetwork Setup Functions OTCfgOpenDatabase OTCfgCloseDatabaseManaging Areas OTCfgGetCurrentArea OTCfgSetCurrentArea OTCfgOpenAreaOTCfgCloseArea OTCfgBeginAreaModiﬁcations function resultOTCfgCommitAreaModiﬁcations function resultOTCfgAbortAreaModiﬁcations OTCfgIsSameAreaIDfunction result OTCfgAbortAreaModifications returns kCfgErrAreaNotFoundOTCfgGetAreaName function resultOTCfgSetAreaName function resultfunction result OTCfgGetAreasCountOTCfgGetAreasList that are available. On output, itemCount points to the number of function resultOTCfgCreateArea function resultOTCfgDuplicateArea function resultManaging Entities OTCfgDeleteAreaOTCfgGetEntitiesCount OTCfgGetEntitiesList entityType On input, a value of type CfgEntityType that speciﬁes the type that is to be matched. To specify all types, set entityType to kCfgTypeAnyEntity. For a list of possible types, see “Entity Classes and Types” page OTCfgIsSameEntityRef OTCfgCreateEntityOn input, a value of type CfgDatabaseRef page 98 that function resultOTCfgDeleteEntity OTCfgDuplicateEntityfunction result const CfgEntityRef* entityRef, const CfgEntityRef* newEntityRefOTCfgGetEntityLogicalName OTCfgGetEntityName function result NoneOTCfgSetEntityName function resultfunction result OTCfgGetEntityAreaOTCfgChangeEntityArea Managing Preferences function result NoneOTCfgOpenPrefs function resultOTCfgClosePrefs OTCfgGetPrefsSizevoid* data, ByteCount length OTCfgGetPrefsfunction result const void* data, ByteCount length OTCfgSetPrefsfunction result OTCfgGetPrefsTOCCount OTCfgGetPrefsTOC OTCfgGetDefault OTCfgDeletePrefsOTCfgGetTemplate Preference Utilities function resultOTCfgEncrypt OTCfgDecryptInstalling and Removing a Notiﬁcation Callback OTCfgInstallNotiﬁerOn input, a value of type CfgDatabaseRef page 98 that function resultfunction result Application-Deﬁned RoutinesOTCfgRemoveNotiﬁer Network Setup Structures and Data Types Notiﬁcation Callback RoutineCfgDatabaseRef CfgAreaIDField descriptions CfgEntityRefCfgEntityInfo CfgEntityAccessID CfgPrefsHeaderCfgResourceLocator CfgSetsStructFlags for this set. For possible values, see the enumeration CfgSetsElement CfgSetsVectorNetwork Setup Constants Entity Classes and TypesWildcard Classes and Types Common Preference Types Per-connection Preference TypesGlobal Preference Types Global Backward Compatibility Preference Types Set Entity Preference TypesBackward Compatibility Preference Types Invalid Area ID OTCfgUserMode PreferenceResult Codes TCP/IP Structures Network Setup Protocol Structures and Data TypesProtocol Structures OTCfgTCPInterfacesUnpacked modulekMaxModuleNameSize partsizeofOTCfgTCPInterfacesPackedPart OTCfgTCPInterfacesPackedOTCfgTCPInterfacesPackedPart OTCfgTCPDHCPLeaseInfo OTCfgTCPDNSServersList OTCfgTCPLockslockDNSServersList lockAdminDomainNamelockLocalDomainName Set to TRUE to lock the “Router address” text ﬁeld OTCfgTCPRoutersListEntry page 119 structures OTCfgTCPRoutersListOTCfgTCPRoutersListEntry OTCfgTCPSearchDomains OTCfgTCPSearchListOTCfgTCPUnloadAttr Apple Remote Access Structures OTCfgRemoteAlternateAddress OTCfgRemoteApplicationOTCfgRemoteARAP regUserOrGuestLock OTCfgRemoteClientLocksuseVerboseLogLock The “Allow error correction and compression in modem” OTCfgRemoteClientMisc OTCfgRemoteConnectconnectAutomatically canInteractOTCfgRemotePPPConnectScript issueConnectedRemindersallowModemDataCompression If Notification Manager reminders are enabled, the number OTCfgRemoteDialAssist isAssisted to 1 to use Dial Assist. When isAssisted is set tomade. Only valid if dialMode is not kOTCfgRemoteRedialNone OTCfgRemoteDialingadditionalPtr OTCfgRemoteIPCP OTCfgRemoteLCP lowerLayerName36kOTCfgRemoteAcceptedVersion. When reading the version OTCfgRemotePassword OTCfgRemoteLogOptionsconfigIDs1 OTCfgRemoteServerconfigCount OTCfgRemoteServerPort struct OTCfgRemoteServerPortOTCfgRemoteNetworkProtocol serialLayerNamekMaxProviderNameSizeOTCfgRemoteTerminal Access mode flags. For possible values, see theNetwork Setup Protocol Structures and Data Types Must be TRUEOTCfgRemoteUserMode OTCfgRemoteX25 Modem Structures OTCfgModemGeneralOTCfgModemApplication OTCfgModemLocks AppleTalk Structures OTCfgATalkGeneral OTCfgATalkGeneralAARP OTCfgATalkGeneralADSP fMaxConsecutiveDataPacketsPage OTCfgATalkGeneralASP fDefaultReleaseTimer OTCfgATalkGeneralATPfDefaultRetryInterval OTCfgATalkGeneralDDP Network Setup Protocol Structures and Data TypesProtocol Structures fMyZonekZIPMaxZoneLength+1The maximum amount of data that packets of this protocol OTCfgATalkGeneralNBP OTCfgATalkGeneralPAP fDefaultTickleIntervalfDefaultTickleRetries fDefaultPAPEOMEnabledOTCfgATalkGeneralZIP OTCfgATalkLocks OTCfgATalkNetworkArchitecture Constant descriptions kOTCfgATalkPortLockMaskInfrared Structures OTCfgATalkPortDeviceTypeProtocol Constants and Other Data Types OTCfgIRGeneralTCP/IP Constants and Other Data Types Network Setup Protocol Structures and Data Types“AppleTalk Constants and Other Data Types” page “Infrared Constants and Other Data Types” pageMasks for the kOTCfgProtocolOptionsPref Preference kDontShutDownOnARPCollisionMask =0x0002 0x0004OTCfgTCPConﬁgMethod Apple Remote Access Constants and Other Data Types ARA Per-Connection Preferences TypesNetwork Setup Protocol Structures and Data Types The preference type for the OTCfgRemoteARAP page 124 structureThe preference type for the OTCfgRemoteDialing page 131 structure The preference type for the OTCfgRemoteClientLocks page 125 structureThe preference type for the OTCfgRemoteConnect page 127 structure ARA Global Preference Types OTCfgRemotePPPConnectScriptOTCfgRemoteProtocol OTCfgRemoteLogLevel OTCfgRemoteDialModeOTCfgRemoteAnswerMode OTCfgRemoteNetworkProtocolOTCfgRemoteNetAccessMode Modem Constants and Other Data TypesModem Global Preference Types OTCfgModemDialingToneModeAppleTalk Constants and Other Data Types Per-connection AppleTalk Preference TypesInfrared Constants and Other Data Types Global AppleTalk Preference TypesOTCfgIRPortSetting Glossary maximum transmission unit MTU The maximum number of bytes in a packet media access control address The six-byte Transmission Control Protocol/Internet Protocol A connection-oriented transport-layer Internet protocol that provides reliable full-duplex data transmission Index Page named areas network connection entities 16 Network Setup notiﬁcation routine installing 94 removinglegacy preference ﬁles mid-level database 15 modem constants 170 multihoming 12Page set entities 16 active, number of 43 using setting entity names 81 structuresTCP/IP constants 160 preferences temporary area 20 third-party developers 55 type, entityI N D E