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)