Avahi ssh publish (#476)

* add avahi-daemon and avahi-utils

* avahi override

* enable avahi daemon

* avahi publish

* Update userspace/usr/comma/avahi-publish-service.sh

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

* Update avahi-publish-service.sh

* Update userspace/files/avahi-ssh-publish.service

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

* add device alias

* remove openpilot reference

---------

Co-authored-by: Adeeb Shihadeh <adeebshihadeh@gmail.com>

Dockerfile.agnos

@@ -222,6 +222,9 @@ RUN echo "precedence ::ffff:0:0/96 100" >> /etc/gai.conf
 # Don't let logind delete /dev/shm
 COPY ./userspace/files/logind.conf /etc/systemd/logind.conf
 
+# Copy Avahi daemon override
+COPY ./userspace/files/avahi-override.conf /etc/systemd/system/avahi-daemon.service.d/override.conf
+
 # Remove qt network bearer plugins
 RUN rm -rf /usr/lib/aarch64-linux-gnu/qt5/plugins/bearer
 

userspace/files/avahi-override.conf

@@ -0,0 +1,3 @@
+[Unit]
+After=network.target
+Wants=network.target

userspace/files/avahi-ssh-publish.service

@@ -0,0 +1,16 @@
+[Unit]
+Description=Publish comma SSH service via Avahi
+After=avahi-daemon.service network.target
+Requires=avahi-daemon.service 
+Wants=network.target
+StartLimitIntervalSec=0
+
+[Service]
+Type=simple
+ExecStart=/usr/comma/avahi-publish-service.sh
+Restart=always
+RestartSec=5
+User=comma
+
+[Install]
+WantedBy=multi-user.target

userspace/install_extras.sh

@@ -13,7 +13,9 @@ apt-fast update && apt-fast install -y --no-install-recommends \
   ncdu \
   nfs-common \
   socat \
-  wavemon
+  wavemon \
+  avahi-daemon \
+  avahi-utils
 
 # color prompt
 sed -i 's/#force_color_prompt=yes/force_color_prompt=yes/g' /home/comma/.bashrc

userspace/services.sh

@@ -24,6 +24,8 @@ systemctl enable ssh-param-watcher.service
 systemctl enable adb-param-watcher.path
 systemctl enable adb-param-watcher.service
 systemctl enable logrotate-hourly.timer
+systemctl enable avahi-daemon
+systemctl enable avahi-ssh-publish.service
 
 # Disable some of our services
 systemctl disable agnos-tests.service

userspace/usr/comma/avahi-publish-service.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+# Read the raw device model
+RAW_MODEL=$(tr -d '\0' < /sys/firmware/devicetree/base/model)
+
+# Extract the device model (e.g., tici, tizi, mici)
+MODEL=$(echo "$RAW_MODEL" | sed 's/comma //g' | awk '{print $1}')
+
+[ -z "$MODEL" ] && MODEL="unknown"
+
+HOSTNAME=$(hostname)
+SERVICE_NAME="comma SSH - $MODEL - [$HOSTNAME]"
+
+ALIAS_FILE="/data/params/d_tmp/ApiCache_Device"
+ALIAS=$(jq -e -r '.alias // empty' "$ALIAS_FILE" 2>/dev/null | grep -E '\S' || echo "$RAW_MODEL")
+
+# Publish avahi service
+exec avahi-publish -s "$SERVICE_NAME" _ssh._tcp 22 "vendor=comma" "device=comma" "model=$MODEL" "alias=$ALIAS"