Inside Macintosh: Open Transport /

Chapter 11 - AppleTalk Service Providers / AppleTalk Service Provider Reference

Constants and Data Types

The AppleTalk Information Structure

You use the AppleTalk information structure to obtain information about the current AppleTalk environment for the node on which your application is running. The AppleTalk information structure is defined by the AppleTalkInfo data type.

struct AppleTalkInfo {
   DDPAddress  fOurAddress;
   DDPAddress  fRouterAddress;
   UInt16      fCableRange[2];
   UInt16      fFlags;
};

Field Description

fOurAddress

The network number and node ID of your node.

fRouterAddress

The network number and node ID of the closest router on your network.

fCableRange

A two-element array indicating the first and last network numbers for the current extended network to which the machine is connected. For nonextended networks, this returns an asterisk (*).

Flags

A set of flag bits that describe the network:

	Flag	Value	Description
	kATalkInfoIsExtended	0x0001	The current network is an extended network.
	kATalkInfoHasRouter	0x0002	There is a router on the same network as this machine.
	kATalkInfoOneZone	0x0004	This network has only one zone.

SEE ALSO

Use the OTATalkGetInfo function (page 11-20) to obtain the AppleTalkInfo data.