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NAME

udpcli - UDP-based BP convergence layer input task

SYNOPSIS

udpcli local_hostname[:local_port_nbr]

DESCRIPTION

udpcli is a background "daemon" task that receives UDP datagrams via a UDP socket bound to local_hostname and local_port_nbr, extracts bundles from those datagrams, and passes them to the bundle protocol agent on the local ION node.

If not specified, port number defaults to 4556.

The convergence layer input task 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 "udp" 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. udpcli can also be spawned and terminated in response to START and STOP commands that pertain specifically to the UDP convergence layer protocol.

EXIT STATUS

  • "0"

    udpcli 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 udpcli.

  • "1"

    udpcli 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 udpcli.

FILES

No configuration files are needed.

ENVIRONMENT

No environment variables apply.

DIAGNOSTICS

The following diagnostics may be issued to the ion.log log file:

  • udpcli can't attach to BP.

    bpadmin has not yet initialized Bundle Protocol operations.

  • No such udp duct.

    No UDP induct matching local_hostname and local_port_nbr has been added to the BP database. Use bpadmin to stop the UDP convergence-layer protocol, add the induct, and then restart the UDP protocol.

  • CLI task is already started for this duct.

    Redundant initiation of udpcli.

  • Can't get IP address for host

    Operating system error. Check errtext, correct problem, and restart UDP.

  • Can't open UDP socket

    Operating system error. Check errtext, correct problem, and restart UDP.

  • Can't initialize socket

    Operating system error. Check errtext, correct problem, and restart UDP.

  • udpcli can't create receiver thread

    Operating system error. Check errtext, correct problem, and restart UDP.

BUGS

Report bugs to <https://github.com/nasa-jpl/ION-DTN/issues>

SEE ALSO

bpadmin(1), bprc(5), udpclo(1)