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.\" $OpenBSD: pppx.4,v 1.5 2020/01/23 00:31:40 dlg Exp $
.\"
.\" Copyright (c) 2013 YASUOKA Masahiko <yasuoka@yasuoka.net>
.\"
.\" Permission to use, copy, modify, and distribute this software for any
.\" purpose with or without fee is hereby granted, provided that the above
.\" copyright notice and this permission notice appear in all copies.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
.\" WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
.\" MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
.\" ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
.\" WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
.\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
.\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
.\"
.Dd $Mdocdate: January 23 2020 $
.Dt PPPX 4
.Os
.Sh NAME
.Nm pppx ,
.Nm pppac
.Nd PPP multiplexer device
.Sh SYNOPSIS
.Cd "pseudo-device pppx"
.Pp
.In sys/socket.h
.In sys/ioctl.h
.In net/pipex.h
.Sh DESCRIPTION
The
.Nm pppx
and
.Nm pppac
drivers works with the
.Xr npppd 8
daemon to provide network interfaces for Point-to-Point Protocol (PPP)
sessions by request from the daemon.
.Nm pppx
operates by allocating a network interface for each PPP
session.
.Nm pppac
concentrates multiple PPP sessions on a single network interface.
The interfaces also work with
.Xr pipex 4
to accelerate the performance of data packet forwarding,
and supports ioctls which are added by
.Xr pipex 4 .
.Pp
To use
.Nm pppx
or
.Nm pppac
from
.Xr npppd 8
the administrator needs to configure the interface configuration in
.Xr npppd.conf 5 .
Also the administrator needs to enable
.Xr pipex 4
by setting
.Va net.pipex.enable
to
.Sq 1
using
.Xr sysctl 8 .
.Sh SEE ALSO
.Xr inet 4 ,
.Xr inet6 4 ,
.Xr pipex 4 ,
.Xr hostname.if 5 ,
.Xr npppd.conf 5 ,
.Xr netstart 8 ,
.Xr npppd 8 ,
.Xr sysctl 8
.Sh HISTORY
The
.Nm pppx
driver first appeared in
.Ox 5.3 .
The
.Nm pppac
interface driver first appeared in
.Ox 6.7 .
.Sh AUTHORS
.An David Gwynne Aq Mt dlg@openbsd.org
.An Claudio Jeker Aq Mt claudio@openbsd.org
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