This is the command dgrcla that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
dgrcla - DGR-based BP convergence layer adapter (input and output) task
dgrcla is a background "daemon" task that spawns two threads, one that handles DGR
convergence layer protocol input and a second that handles DGR convergence layer protocol
The input thread receives DGR messages via a UDP socket bound to local_hostname and
local_port_nbr, extracts bundles from those messages, and passes them to the bundle
protocol agent on the local ION node. (local_port_nbr defaults to 1113 if not specified.)
The output thread extracts bundles from the queues of bundles ready for transmission via
DGR to remote bundle protocol agents, encapsulates them in DGR messages, and sends those
messages to the appropriate remote UDP sockets as indicated by the host names and UDP port
numbers (destination induct names) associated with the bundles by the routing daemons that
Note that dgrcla is a "promiscuous" convergence layer daemon, able to transmit bundles to
any DGR destination induct. Its duct name is the name of the corresponding induct, rather
than the induct name of any single DGR destination induct to which it might be dedicated,
so scheme configuration directives that cite this outduct must provide destination induct
IDs. For the DGR convergence-layer protocol, destination induct IDs are identical to
induct names, i.e., they are of the form local_hostname[:local_port_nbr].
dgrcla 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. dgrcla can also be spawned and terminated in response to START and
STOP commands that pertain specifically to the DGR convergence layer protocol.
"0" dgrcla 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 dgrcla.
"1" dgrcla 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 dgrcla.
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