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OpenLDV Programmer’s Guide 57

Sending and Receiving Messages

with the OpenLDV API

This chapter describes the network interface message commands that

your OpenLDV application can send and receive through a network

interface, as well as the application buffer structure that each type of

message requires.

1 2 ... 60 61 62 63 64 65 66 67 68 69 70 ... 193 194

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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