incorrections

Threaded UDP relay for CMR+ GPS corrections

Designed to be a python drop in replacement for samplicator

• Listens on specified UDP port for data from a specified source IP
• Forwards data to each IP in the config file on the specified port
• Interactive mode (curses TUI) or non-interactive mode (periodic log output)

Install

pip install .

Requires Python 3.6+ and psutil.

Usage

Interactive mode (curses TUI, Linux only)

incorrections --bind-ip 10.0.0.1 --source-ip 10.0.0.2

Non-interactive mode (headless / systemd)

incorrections --no-interactive --interval 300 --bind-ip 10.0.0.1 --source-ip 10.0.0.2

Prints a keepalive stats line every --interval seconds (default 300).

All options

--source-ip     Source IP to filter packets from (default: 192.168.20.69)
--listen-port   Local UDP port to listen on (default: 5019)
--bind-ip       Local IP to bind to (default: 192.168.20.81)
--dest-port     Destination port for forwarded packets (default: 5019)
--conf          IP list config file (default: sample.conf)
--no-interactive  Non-interactive mode: log stats to stdout
--interval      Stats print interval in seconds (default: 300)

IP List File Format

Default file: sample.conf

Plain IPs (one per line):

10.20.66.109
10.20.66.110

Or samplicator format (source:dest/port):

10.20.23.230:10.20.66.109/5019

Lines beginning with # are comments. Port-per-IP is not used — port is set globally via --dest-port.

Tests

pip install pytest
python -m pytest test_gps3.py -v