NAME

udplsi - UDP-based LTP link service input task

SYNOPSIS

udplsi {local_hostname | @}[:local_port_nbr]

DESCRIPTION

udplsi is a background "daemon" task that receives UDP datagrams via a UDP 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"

udplsi 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 udplsi.
"1"

udplsi 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 udplsi.

FILES

No configuration files are needed.

ENVIRONMENT

No environment variables apply.

DIAGNOSTICS

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

udplsi can't initialize LTP.

ltpadmin has not yet initialized LTP protocol operations.
LSI task is already started.

Redundant initiation of udplsi.
LSI can't open UDP socket

Operating system error. Check errtext, correct problem, and restart udplsi.
LSI can't initialize socket

Operating system error. Check errtext, correct problem, and restart udplsi.
LSI can't create receiver thread

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

BUGS

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