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)