From f413d8fe914f8567bb55c0b21745ad29b4a686c6 Mon Sep 17 00:00:00 2001
From: wiedehopf <wiedehopf@users.noreply.github.com>
Date: Tue, 5 Nov 2024 17:35:36 +0100
Subject: [PATCH] add option to disable MLAT (#85)

currently MLAT can't be disabled contrary to the readme
---
 README.md                                    | 3 ++-
 docker-compose.yml                           | 3 ++-
 rootfs/etc/s6-overlay/scripts/55-mlat-client | 4 ++++
 rootfs/etc/s6-overlay/scripts/mlat-client    | 5 +++++
 4 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 414ef17..dde4322 100644
--- a/README.md
+++ b/README.md
@@ -86,10 +86,11 @@ To add `RadarVirtuel` to an existing Docker Stack, simply copy and paste the rel
 | `LAT`             | This is your station latitude (used with MLAT)                                                                                                                                                                                               |                                                                                                                 |
 | `LON`             | This is your station longitude (used with MLAT)                                                                                                                                                                                              |                                                                                                                 |
 | `ALT`             | This is your antenna altitude above the ellipsoid (MSL). Use "ft" for feet or "m" for meters                                                                                                                                                 |                                                                                                                 |
+| `ENABLE_MLAT`     | Enable MLAT                                                                                                                                                                                                                                  | `true` (default) / `false`                                                                                      |
 
 ## MLAT Configuration
 
-By default, MLAT is switched ON in the container. Please make sure to configure a valid `MLAT_HOST`, `LAT`, `LON`, and `ALT` in your `docker-compose.yml` setup. If you want to switch off MLAT, simply set `MLAT_HOST` to empty. You will see a message in the logs encouraging to configure MLAT, followed by a message saying that MLAT is disabled.
+By default, MLAT is switched ON in the container. Please make sure to configure a valid `MLAT_HOST`, `LAT`, `LON`, and `ALT` in your `docker-compose.yml` setup. If you want to switch off MLAT, simply set `ENABLE_MLAT` to false.
 
 ## Timezone configuration
 
diff --git a/docker-compose.yml b/docker-compose.yml
index bd1c112..d192a24 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -28,7 +28,8 @@ services:
       - FEEDER_KEY=${RV_FEEDER_KEY}
       - SOURCE_HOST=${HOSTNAME}:30002
       - RV_SERVER=mg2.adsbnetwork.com:50050
-      # MLAT related params; set "MLAT_HOST=" (empty) to disable MLAT
+      # MLAT related params
+      - ENABLE_MLAT=true
       - MLAT_HOST=${HOSTNAME}:30005
       - MLAT_SERVER=mlat.adsbnetwork.com:50000
       - LAT=${FEEDER_LAT}
diff --git a/rootfs/etc/s6-overlay/scripts/55-mlat-client b/rootfs/etc/s6-overlay/scripts/55-mlat-client
index fd26a97..295a9f6 100755
--- a/rootfs/etc/s6-overlay/scripts/55-mlat-client
+++ b/rootfs/etc/s6-overlay/scripts/55-mlat-client
@@ -19,6 +19,10 @@
 
 source /scripts/common
 
+if chk_disabled "${ENABLE_MLAT}"; then
+    exit 0
+fi
+
 "${s6wrap[@]}" echo "Initializing mlat-client..."
 
 MLAT_FLAG="/run/mlat-down"
diff --git a/rootfs/etc/s6-overlay/scripts/mlat-client b/rootfs/etc/s6-overlay/scripts/mlat-client
index 26a99be..6737be7 100755
--- a/rootfs/etc/s6-overlay/scripts/mlat-client
+++ b/rootfs/etc/s6-overlay/scripts/mlat-client
@@ -19,6 +19,11 @@
 
 source /scripts/common
 
+if chk_disabled "${ENABLE_MLAT}"; then
+    "${s6wrap[@]}" echo "MLAT is DISABLED (ENABLE_MLAT set to $ENABLE_MLAT)"
+    stop_service
+fi
+
 "${s6wrap[@]}" echo "Started as an s6 service"
 
 MLAT_CMD="/usr/local/bin/mlat-client"