NIO CommKit Host Interface Installation and System Administration Manual

DKTLI(7) DKTLI(7)

E-87 CommKit Host Interface, Release 4.0

NAME

dktli – CommKit Interface Connection Oriented Transport Provider

SYNOPSIS

t = t_open("/dev/dktp0", O_RDWR, NULL);

DESCRIPTION

dktli is the CommKit Host Transport Provider that supports a Transport Provider Interface (TPI). Programs

can access dktli using the Transport Level Interface (TLI) [see UNIX System V Release 4.0 Programmer’s

Guide: Networking Interfaces for more information about TLI] where it supports the connection-oriented

with orderly release (T_COTS_ORD) service type. dktli supports all TLI connection-mode primitives and

all TLI common management primitives except t_optmgmt. dktli does not support any connectionless mode

primitives and does not support transmission of user data during any state other than data transfer.

dktli consists of the dktm multiplexing driver. dktli interfaces with the dkux(7) module (which provides call

management functions) and dkhs(7) driver at the bottom for call management and data transfer. dktli uses a

user-level daemon process dkdaemon(1M) to link and unlink dkhs(7) Streams below the multiplexing driver

dktm . The TPI becomes available when the dkdaemon(1M) process starts and the TPI becomes inaccessible

when the dkdaemon(1M) process stops.

The net_spec associated with dktli is dktpX, where X is the host hardware interface number. On systems

installed with more than one host hardware interface, application programs may access a particular hardware

interface through invoking t_open(3N) with the desired net_spec (for example, /dev/dktp0) as the argument.

A network server may offer a service with the name, LISTENAME, known to its clients by invoking

t_bind(3N) to bind LISTENAME to the transport endpoint.

EXAMPLE

The code fragments below illustrate how a client can establish an AT&T data switch circuit through dktli to

a server listening on address LISTENAME.

#include <tiuser.h>

struct t_call *sndcall;

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

t_bind(fd, NULL, NULL);

sndcall->addr.buf = "area/exchange/LISTENAME";

sndcall->addr.len = sizeof("area/exchange/LISTENAME");

t_connect(fd, sndcall, NULL);

FILES

/dev/dktpX control device for interface X

/usr/lib/libnsl.so TLI subroutine library