NIO CommKit Host Interface Installation and System Administration Manual

5-6

Programming with the CommKit Function Library

Making STREAMS-Based Outgoing Connections

If you are porting an application from CommKit 3.2 to CommKit 4.x of the

NIO CommKit Host Interface, be aware that the method for specifying the

Datakit interface board number for the outgoing connection has changed. In

earlier releases, you speciﬁed the outgoing board number with the

bndcall->qlen parameter of the tbind() function call.

In CommKit 4.x however, you specify the outgoing connection with the

name argument of the t_open() function call. To use t_open(), enter a

function call in the following format:

int t_open (name, oflag, info)

For example, to use Datakit interface board 0, you could use the following

function call:

fd = topen ("/dev/dktp0", O_RDWR, NULL);

The name argument points to a device special ﬁle which identiﬁes the

transport provider. The CommKit software has a separate device special ﬁle

for each Datakit interface board:

• /dev/dktp0 for Datakit interface board 0

• /dev/dktp1 for Datakit interface board 1, and so on

For more information on t_open(), refer to its online manual page.