tcpclo - Online in the Cloud

PROGRAM:

NAME

tcpclo - DTN TCPCL-compliant convergence layer adapter output task

SYNOPSIS

tcpclo remote_hostname[:remote_port_nbr]

DESCRIPTION

tcpclo is a background "daemon" task that connects to a remote node's TCP socket at
remote_hostname and remote_port_nbr. It sends a contact header, and it records the
acknowledgement flag, reactive fragmentation flag and negative acknowledgements flag in
the contact header it receives from its peer tcpcli task. It then begins extracting
bundles from the queues of bundles ready for transmission via TCP to this remote bundle
protocol agent and transmitting those bundles over the connected socket to that node.
Each transmitted bundle is preceded by message type, segmentation flags, and an SDNV
indicating the size of the bundle (in bytes).

If not specified, remote_port_nbr defaults to 4556.

Note that tcpclo is not a "promiscuous" convergence layer daemon: it can transmit bundles
only to the node to which it is connected, so scheme configuration directives that cite
this outduct need only provide the protocol name and the outduct name as specified on the
command line when tcpclo is started.

tcpclo is spawned automatically by bpadmin in response to the 's' (START) command that
starts operation of the Bundle Protocol, and it is terminated by bpadmin in response to an
'x' (STOP) command. tcpclo can also be spawned and terminated in response to START and
STOP commands that pertain specifically to the TCP convergence layer protocol.

EXIT STATUS

"0" tcpclo 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 the TCPCL protocol.

"1" tcpclo 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 the TCPCL
protocol.

Use tcpclo online using onworks.net services