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

SS

COP-UU data
size

to N
octets.

k=N Set

the maximum

SS

COP SDU data
size

to N
octets.

cc=N Set

the parame

ter

MaxCC (maximum

number of
con

nection control

message retrans

missions)
to

the value N.

pd=N Set

the parame

ter

MaxPD (maximum

acceptable
num

ber of outstand

ing unacknowl

edged SD
PDUs

before
send

ing a POLL)
to

the value N.

stat=N Set

the parame

ter

MaxSTAT
(max

imum number
of

elements
placed

in a STAT
PDU)

to the
val

ue N.

-b Enable the ATM-Forum SSCOP

robustness

enhancement.

-e Exit when there is an end of

file condi

tion 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 informa

tion 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 mil

liseconds. The

following timers may be set:

cc=m Set

the connec

tion

control
timer

to m.
This

timer controls

the
re

transmission
of

connection
con

trol messages.

poll=m Set

the poll

timer

to m.
This

timer controls

the transmis

sion of POLL
mes

sages.

ka=m Set

the keep

alive

timer to
m.

This timer
con

trols the
max

imum length
of

the transient
phase.

nr=m Set

the no

re

sponse timer
to

m. This
timer

controls
the

maximum time
be

tween two
re

ceived STAT
PDUs

before the
con

nection is
abort

ed.

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 proto

col. Wait for a

establish indication from the

remote side.

-x Enable to POLL after retrans

mission flag.

-3 Send user output to file de

scriptor 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>

BSD October 28, 2003

BSD