SSCOP(1) FreeBSD General Commands Manual SSCOP(1)
NAME
sscop - SSCOP transport protocol
SYNOPSIS
sscop [-Fbefhirwx3] [-V X] [-W N] [-a p=v] [-l N] [-t t=m] [-v X]
DESCRIPTION
The sscop 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:
-F Use frameing on the SSCOP connection (see
the -f option).
-V X Set the verbose flag to the hex value X.
-W N Set the initial SSCOP window to N.
-a p=v Set SSCOP parameter p to the value v. The
following parameters may be set:
j=N Set the maximum
SSCOP-UU data
size to N
octets.
k=N Set the maximum
SSCOP SDU data
size to N
octets.
cc=N Set the
parameter MaxCC
(maximum number
of connection
control message
re-
transmissions)
to the value N.
pd=N Set the
parameter MaxPD
(maximum
acceptable
number of
outstanding
unacknowledged
SD PDUs before
sending a POLL)
to the value N.
stat=N Set the
parameter
MaxSTAT (maximum
number of
elements placed
in a STAT PDU)
to the value N.
-b Enable the ATM-Forum SSCOP robustness
enhancement.
-e Exit when there is an end of file
condition on the input file or the SSCOP
indicates a release confirmation.
-f Use the framing protocol for communication
over the SSCOP link. See frame(l)
(libbegemot) for framing.
-h Print a short help information and exit.
-i Try not to read from the user input file
descriptor. Assume that we a receiving
only.
-l N Loose every Nth message. This is used for
testing.
-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.
-t t=m Set SSCOP timer t to m milliseconds. The
following timers may be set:
cc=m Set the
connection
control timer to
m. This timer
controls the
retransmission
of connection
control
messages.
poll=m Set the poll
timer to m.
This timer
controls the
transmission of
POLL messages.
ka=m Set the keep-
alive timer to
m. This timer
controls the
maximum length
of the transient
phase.
nr=m Set the no-
response timer
to m. This
timer controls
the maximum time
between two
received STAT
PDUs before the
connection is
aborted.
idle=m Set the idle
timer to m.
This timer
controls the
length of the
idle phase.
-v X Set the SSCOP library verbose flag to the
hex value.
-w Don't start the SSCOP protocol. Wait for a
establish indication from the remote side.
-x Enable to POLL after retransmission flag.
-3 Send user output to file descriptor 3.
EXAMPLES
The following command line sends the file Makefile over a pipe (this
depends on the feature that pipes are bi-directional):
cat Makefile | sscop -reF | sscop -weF
SEE ALSO
libunimsg(3)
STANDARDS
The implemented protocol conforms to ITU-T recommendation Q.2110.
AUTHORS
Hartmut Brandt <harti@FreeBSD.org>
FreeBSD 13.1-RELEASE-p6 October 28, 2003 FreeBSD 13.1-RELEASE-p6
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