Echelon OpenLDV User Manual Page 170
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162 Custom Lookup Extension Component Programming
Overview
This appendix describes the interfaces and methods that your custom lookup
extension component can use or must implement:
• Implement
o ILdvxConfigure (optional)
o ILdvxLookup (required)
• Use
o ILdvxSCO
o ILdvxSCO2
o ILdvxSCO_TCP
A lookup extension component must implement ILdvxLookup, and can
optionally implement ILdvxConfigure. During its operation, the lookup
extension component calls methods of the ILdvxSCO, ILdvxSCO2, and
ILdvxSCO_TCP interfaces. Types and error codes used by the RNIs are
declared in the LdvxTypes.h and LdvxResult.h header files, or in the Ldvx.tlb
type library.
The SampleLookupCsv.cpp and SampleLookupVBNet.vb sample lookup
extension components use the methods described in this chapter. See Sample
Lookup Extension Component on page 132 for more information about these
examples.
ILdvxConfigure Interface
This configuration interface is an optional interface implemented by an xDriver
lookup extension component. It defines methods that are used to pass
configuration information (instance name and options) to the lookup extension
component at instantiation.
SetInstance Method
Applies to: xDriver Lookup Extension Component
This method is passed the instance name of the lookup extension component for a
session. Typically, each profile has its own instance of a lookup extension
component.
Profiles can be configured to share an instance of an xDriver lookup extension
component by using the same instance name, which allows a single xDriver
lookup extension component to be shared by multiple profiles. The instance
name itself can be used as a key internally. You can set the lookup instance to be
used by a given xDriver profile with the OpenLDV xDriver Profile Editor. For
more information, see xDriver Profiles on page 134.
- OpenLDV 1
- Programmer’s Guide 1
- Welcome 3
- Audience 3
- Examples 4
- Related Documentation 4
- Table of Contents 5
- Introduction 9
- ONWORKS network: 10
- OpenLDV Driver 11
- Client Applications 11
- Network Interfaces 12
- Installing the OpenLDV SDK 14
- Using the OpenLDV API 17
- ONWORKS network 18
- Application Layer 20
- Presentation Layer 21
- Overview of the OpenLDV API 21
- The OpenLDV API 23
- ONWORKS interface device 24
- ONWORKS name (such as 24
- LDVDevices Structure 46
- LdvCombineFlags Enumeration 47
- LdvDeviceCaps Enumeration 48
- LDVDriverInfo Structure 50
- LdvDriverID Enumeration 51
- LdvDriverType Enumeration 52
- OpenLDV API Return Codes 53
- ONWORKS Interfaces 57
- msgSize); 62
- Constructing Messages 66
- Application Buffer Structure 66
- Layer 2 Buffer Structure 69
- Application Layer Header 69
- Layer 2 Header 69
- Layer 5 Buffer Structure 70
- Message Header 70
- ExpMsgHdr 71
- NetVarHdr 73
- ONWORKS transceivers 74
- Network Address 75
- RcvAddrDtl 78
- RespAddrDtl 80
- Message Data 81
- UnprocessedNV 82
- ExplicitMsg 82
- Downlink Commands 84
- Uplink Commands 85
- Immediate Commands 85
- Network Interface Commands 85
- Common Definitions 98
- Dispatchers 98
- Toolkits and User Interface 99
- Developer Example Diagram 100
- ONWORKS 101
- LNS Applications for xDriver 106
- Extending xDriver 107
- Downlink Sessions 108
- 102 Extending xDriver 110
- Typical Downlink Scenario 111
- Uplink Sessions 112
- ONWORKS network, in a 114
- Typical Uplink Scenario 115
- Session Control Object 116
- Authentication Key Handling 119
- ONWORKS \xDriver\Components 123
- Add a COM Object 124
- Test the Lookup Extension 132
- Optional Steps 132
- Add a COM Class 135
- LNS Programming with xDriver 145
- ONWORKS networks 147
- ONWORKS networks by 148
- Uplink Sample Application 150
- Custom Network Interfaces 155
- Overview 156
- Windows Registry Entries 158
- LNS Methods and Events for 161
- AcceptIncomingSession 162
- Remarks 162
- BeginIncomingSessionEvents 163
- EndIncomingSessionEvents 163
- NetworkInterfaces.Item( ) 164
- Syntax 164
- OnIncomingSessionEvent 165
- ReleasePendingUpdates 166
- Custom Lookup Extension 169
- Component Programming 169
- ILdvxConfigure Interface 170
- SetInstance Method 170
- Returns 171
- SetOptions Method 171
- ILdvxLookup Interface 172
- DownlinkLookup Method 172
- UpdateLookup Method 173
- UplinkLookup Method 173
- ILdvxSCO Interface 174
- GetDownlinkKey Method 177
- GetUplinkKey Method 180
- SetAuthenticationFlag Method 181
- SetDownlinkKey Method 183
- SetEncryptionType Method 183
- SetLNSNetworkName Method 184
- SetUplinkKey Method 186
- ILdvxSCO_TCP Interface 186
- GetRemoteTCPAddress Method 187
- GetRemoteTCPPort Method 187
- SetRemoteTCPAddress Method 188
- SetRemoteTCPPort Method 188
- ILdvxSCO2 Interface 189
- GetNeuronID Method 189
- 184 Index 192
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