This project uses Go to simulate a simplified version of an OLSR ad hoc network as defined by RFC 3626. For the simulation, each node is run as a goroutine, with an input and output channel. A controller is used to facilitate message interchange based on a supplied network topology.
There is a single executable, with no need to spawn additional processes.
All communication is facilitated through Go channels, and each node logs all communication to files.
Executing olsrsim with no arguments will show a usage message.
During execution, all messages sent and received by nodes will be logged to stdout.
Post execution, a new directory log will appear. This directory will include three
log files for each node:
{NODE_ID}_in.txt:
A log file containing all messages that the given node received during the
execution.
{NODE_ID}_out.txt:
A log file containing all messages that the given node sent during the
execution.
{NODE_ID}_received.txt:
A log file containing all data that the given node received during the
execution.
-nf string
Node configuration file path.
A path to a text file which includes newline separated node configurations.
The configurations have the following format:
{SRC_NODE_ID} {DST_NODE_ID} "{MSG}" {MSG_DELAY}
EXAMPLE FILE CONTENTS
0 2 "(0 -> 2)" 30
1 4 "(1 -> 4)" 40
2 3 "hello 3, from 2" 40
3 6 "(3 -> 6)" 40
4 0 "(4 -> 0)" 30
5 1 "this is 5, 1" 30
6 5 "(6 -> 5)" 30
-tf string
Topology file path.
A path to a text file which includes newline separated topology values.
The values have the following format:
{TICK_NUM} {UP | DOWN} {FROM_NODE_ID} {TO_NODE_ID}
EXAMPLE FILE CONTENTS
10 UP 0 1
10 UP 1 0
20 DOWN 0 1
20 DOWN 1 0
21 UP 0 2
25 UP 2 0
-t int
Tick duration in milliseconds. Specifies how fast the simulation will run.
(default 1000)
-rt int
Number of ticks the simulation will run for. (default 120)
The following command uses the included testdata to run a demonstration simulation.
olsrsim -nf ./testdata/test_node_config.txt -tf ./testdata/test_topology.txt
The following command sets the tick rate to 100ms, increasing the simulation speed.
olsrsim -nf ./testdata/test_node_config.txt -tf ./testdata/test_topology.txt -t 100