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NAME

dccplsi - DCCP-based LTP link service input task

SYNOPSIS

dccplsi {local_hostname | @}[:local_port_nbr]

DESCRIPTION

dccplsi is a background "daemon" task that receives DCCP datagrams via a DCCP socket bound to local_hostname and local_port_nbr, extracts LTP segments from those datagrams, and passes them to the local LTP engine. Host name "@" signifies that the host name returned by hostname(1) is to be used as the socket's host name. If not specified, port number defaults to 1113.

The link service input task is spawned automatically by ltpadmin in response to the 's' command that starts operation of the LTP protocol; the text of the command that is used to spawn the task must be provided as a parameter to the 's' command. The link service input task is terminated by ltpadmin in response to an 'x' (STOP) command.

EXIT STATUS

  • "0"

    dccplsi 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 ltpadmin to restart dccplsi.

  • "1"

    dccplsi terminated abnormally, for reasons noted in the ion.log file. Investigate and solve the problem identified in the log file, then use ltpadmin to restart dccplsi.

FILES

No configuration files are needed.

ENVIRONMENT

No environment variables apply.

DIAGNOSTICS

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

  • dccplsi can't initialize LTP.

    ltpadmin has not yet initialized LTP protocol operations.

  • LSI task is already started.

    Redundant initiation of dccplsi.

  • LSI can't open DCCP socket. This probably means DCCP is not supported on your system.

    Operating system error. This probably means that you are not using an operating system that supports DCCP. Make sure that you are using a current Linux kernel and that the DCCP modules are being compiled. Check errtext, correct problem, and restart dccplsi.

  • LSI can't initialize socket.

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

  • LSI can't create listener thread.

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

BUGS

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

SEE ALSO

ltpadmin(1), dccplso(1), owltsim(1)