NAME¶
sstcpcli - DTN simple TCP convergence layer input task
SYNOPSIS¶
stcpcli local_hostname[:
local_port_nbr]
DESCRIPTION¶
stcpcli is a background "daemon" task comprising 1 + N threads:
one that handles TCP connections from remote
stcpclo tasks, spawning
sockets for data reception from those tasks, plus one input thread for each
spawned socket to handle data reception over that socket.
The connection thread simply accepts connections on a TCP socket bound to
local_hostname and
local_port_nbr and spawns reception threads.
The default value for
local_port_nbr, if omitted, is 4556.
Each reception thread receives bundles over the associated connected socket.
Each bundle received on the connection is preceded by a 32-bit unsigned
integer in network byte order indicating the length of the bundle. The
received bundles are passed to the bundle protocol agent on the local ION
node.
stcpcli is spawned automatically by
bpadmin in response to the 's'
(START) command that starts operation of the Bundle Protocol; the text of the
command that is used to spawn the task must be provided at the time the
"stcp" convergence layer protocol is added to the BP database. The
convergence layer input task is terminated by
bpadmin in response to an
'x' (STOP) command.
stcpcli can also be spawned and terminated in
response to START and STOP commands that pertain specifically to the STCP
convergence layer protocol.
EXIT STATUS¶
- "0"
- stcpcli terminated normally, for reasons noted in the
ion.log file. If this termination was not commanded, investigate
and solve the problem identified in the log file and use bpadmin to
restart stcpcli.
- "1"
- stcpcli terminated abnormally, for reasons noted in the
ion.log file. Investigate and solve the problem identified in the
log file, then use bpadmin to restart stcpcli.
FILES¶
No configuration files are needed.
ENVIRONMENT¶
No environment variables apply.
DIAGNOSTICS¶
The following diagnostics may be issued to the
ion.log log file:
- stcpcli can't attach to BP.
- bpadmin has not yet initialized Bundle Protocol operations.
- No such stcp duct.
- No STCP induct matching local_hostname and local_port_nbr
has been added to the BP database. Use bpadmin to stop the STCP
convergence-layer protocol, add the induct, and then restart the STCP
protocol.
- CLI task is already started for this duct.
- Redundant initiation of stcpcli.
- Can't get IP address for host
- Operating system error. Check errtext, correct problem, and restart
STCP.
- Can't open TCP socket
- Operating system error. Check errtext, correct problem, and restart
STCP.
- Can't initialize socket
- Operating system error. Check errtext, correct problem, and restart
STCP.
- stcpcli can't create access thread
- Operating system error. Check errtext, correct problem, and restart
STCP.
BUGS¶
Report bugs to <ion-bugs@korgano.eecs.ohiou.edu>
SEE ALSO¶
bpadmin(1),
bprc(5),
stcpclo(1)