.\"
.\" Copyright (c) 2001-2003
.\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
.\" 	All rights reserved.
.\"
.\" Author: Harti Brandt <harti@FreeBSD.org>
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" $Begemot: libunimsg/sscop/sscop.1,v 1.3 2004/07/08 08:22:28 brandt Exp $
.\"
.Dd October 28, 2003
.Dt SSCOP 1
.Os
.Sh NAME
.Nm sscop
.Nd "SSCOP transport protocol"
.Sh SYNOPSIS
.Nm
.Op Fl Fbefhirwx3
.Op Fl V Ar X
.Op Fl W Ar N
.Op Fl a Ar p Ns Li = Ns Ar v
.Op Fl l Ar N
.Op Fl t Ar t Ns Li = Ns Ar m
.Op Fl v Ar X
.Sh DESCRIPTION
The
.Nm
tool implements the Q.2110 transport protocol.
Normally the program reads from standard input and sends this input over
the SSCOP protocol on the standard output file descriptor. This means, that
the standard output file descriptor should be connected in read-write mode.
The program takes the
following arguments:
.Bl -tag -width ".It Fl a Ar p Ns Li = Ns Ar v"
.It Fl F
Use frameing on the SSCOP connection (see the
.Fl f
option).
.It Fl V Ar X
Set the verbose flag to the hex value
.Ar X .
.It Fl W Ar N
Set the initial SSCOP window to
.Ar N .
.It Fl a Ar p Ns Li = Ns Ar v
Set SSCOP parameter
.Ar p
to the value
.Ar v .
The following parameters may be set:
.Bl -tag -width ".It Li stat Ns = Ns Ar N"
.It Li j Ns = Ns Ar N
Set the maximum SSCOP-UU data size to
.Ar N
octets.
.It Li k Ns = Ns Ar N
Set the maximum SSCOP SDU data size to
.Ar N
octets.
.It Li cc Ns = Ns Ar N
Set the parameter
.Li MaxCC
(maximum number of connection control message re-transmissions) to
the value
.Ar N .
.It Li pd Ns = Ns Ar N
Set the parameter
.Li MaxPD
(maximum acceptable number of outstanding unacknowledged SD PDUs before
sending a POLL) to the value
.Ar N .
.It Li stat Ns = Ns Ar N
Set the parameter
.Li MaxSTAT
(maximum number of elements placed in a STAT PDU) to the value
.Ar N .
.El
.It Fl b
Enable the ATM-Forum SSCOP robustness enhancement.
.It Fl e
Exit when there is an end of file condition on the input file or the
SSCOP indicates a release confirmation.
.It Fl f
Use the framing protocol for communication over the SSCOP link. See
.Xr frame l
(libbegemot) for framing.
.It Fl h
Print a short help information and exit.
.It Fl i
Try not to read from the user input file descriptor. Assume that we a receiving
only.
.It Fl l Ar N
Loose every Nth message. This is used for testing.
.It Fl r
Revert user and SSCOP file descriptors. That means, that user input and output
is done on standard output and SSCOP input and output on standard input.
.It Fl t Ar t Ns Li = Ns Ar m
Set SSCOP timer
.Ar t
to
.Ar m
milliseconds. The following timers may be set:
.Bl -tag -width ".It Li stat Ns = Ns Ar N"
.It Li cc Ns = Ns Ar m
Set the connection control timer to
.Ar m .
This timer controls the retransmission of connection control messages.
.It Li poll Ns = Ns Ar m
Set the poll timer to
.Ar m .
This timer controls the transmission of POLL messages.
.It Li ka Ns = Ns Ar m
Set the keep-alive timer to
.Ar m .
This timer controls the maximum length of the transient phase.
.It Li nr Ns = Ns Ar m
Set the no-response timer to
.Ar m .
This timer controls the maximum time between two received STAT PDUs before
the connection is aborted.
.It Li idle Ns = Ns Ar m
Set the idle timer to
.Ar m .
This timer controls the length of the idle phase.
.El
.It Fl v Ar X
Set the SSCOP library verbose flag to the hex value.
.It Fl w
Don't start the SSCOP protocol. Wait for a establish indication from the remote
side.
.It Fl x
Enable to POLL after retransmission flag.
.It Fl 3
Send user output to file descriptor 3.
.El
.Sh EXAMPLES
The following command line sends the file
.Pa Makefile
over a pipe (this depends on the feature that pipes are bi-directional):
.Bd -literal
cat Makefile | sscop -reF | sscop -weF
.Ed
.Sh SEE ALSO
.Xr libunimsg 3
.Sh STANDARDS
The implemented protocol conforms to ITU-T recommendation Q.2110.
.Sh AUTHORS
.An Hartmut Brandt Aq harti@FreeBSD.org