beelinescanner.service

[Unit]
Description=Beeline Scanner - 5-minute Task

[Service]
EnvironmentFile=-/opt/beelinescanner/environments.sh
WorkingDirectory=/opt/beelinescanner
Type=oneshot
ExecStart=/opt/beelinescanner/script.sh

beelinescanner.timer

# Option A: Run at fixed 5-minute clock intervals (e.g., 10:00, 10:05, 10:10)
OnCalendar=*:0/5

# Option B: Alternatively, run every 5 minutes relative to when it last started
# OnUnitActiveSec=5min

# Ensures the task runs immediately if the system was off during a scheduled time
Persistent=true

[Install]
WantedBy=timers.target

environments.sh

MACADDRESS="XX:XX:XX:XX:XX:XX"
RTSPUSER="admin"
RTSPPASS="12345678"

GO2RTCCAMERANAME="camera6_channel1"

install.sh

#!/bin/bash

# Check if programs are installed.
export DEBIAN_FRONTEND=noninteractive

apt-get update 

INSTALL_PROGRAM=""
if command -v curl >/dev/null; then
    echo "CURL is installed."
else
   INSTALL_PROGRAM="${INSTALL_PROGRAM} curl"
fi

if command -v jq >/dev/null; then
    echo "JQ is installed."
else
   INSTALL_PROGRAM="${INSTALL_PROGRAM} jq"
fi

if command -v nmap >/dev/null; then
    echo "NMAP is installed."
else
   INSTALL_PROGRAM="${INSTALL_PROGRAM} nmap"
fi

echo ${INSTALL_PROGRAM}

if [ -n "$INSTALL_PROGRAM" ]; then
   apt-get -qq -y install ${INSTALL_PROGRAM} --no-install-recommends
fi

if command -v yq >/dev/null; then
    echo "YQ is installed."
else
    curl -Ls "https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64" \
      -o /usr/local/bin/yq
    curl -Ls "https://github.com/mikefarah/yq/releases/latest/download/checksums" \
      -o /tmp/checksums
    if grep -q "$(sha256sum /usr/local/bin/yq | awk '{ print $1}')" /tmp/checksums; then
       echo "YQ checksum is matched."
    else
       echo "YQ checksums is not matched"
       exit 1
    fi
    chmod 0755 /usr/local/bin/yq
fi

mkdir -p /opt/beelinescanner

echo "Downloading script, environment, systemd timer, systemd service files."

curl -Ls "https://gist.githubusercontent.com/Nurmukhamed/88c73ca7f2f612238610c2ef8d5309bc/raw/67692232fcc9c1961df6b9695687070d3fb58731/script.sh" \
  -o /opt/beelinescanner/script.sh
chmod 0755 /opt/beelinescanner/script.sh

curl -Ls "https://gist.githubusercontent.com/Nurmukhamed/88c73ca7f2f612238610c2ef8d5309bc/raw/67692232fcc9c1961df6b9695687070d3fb58731/environments.sh" \
  -o /opt/beelinescanner/environments.sh
chmod 0755 /opt/beelinescanner/environments.sh

curl -Ls "https://gist.githubusercontent.com/Nurmukhamed/88c73ca7f2f612238610c2ef8d5309bc/raw/67692232fcc9c1961df6b9695687070d3fb58731/beelinescanner.timer" \
  -o /etc/systemd/system/beelinescanner.timer
  
curl -Ls "https://gist.githubusercontent.com/Nurmukhamed/88c73ca7f2f612238610c2ef8d5309bc/raw/67692232fcc9c1961df6b9695687070d3fb58731/beelinescanner.service" \
  -o /etc/systemd/system/beelinescanner.service
  
systemctl daemon-reload
systemctl enable --now beelinescanner.timer

script.sh

#!/bin/bash

# Constants


BEELINELAN="192.168.8.0/24"
FOLDER=/opt/beelinescanner
OUTPUTFILE=output.txt

FRIGATECONFIGFILE="/opt/frigate/config/config.yaml"

DOCKERCOMPOSEFILE="/opt/docker/main"

RTSPPORT="554"
RTSPPATH="cam/realmonitor?channel=1&subtype=0"
RTSPSTRING="rtsp://%s:%s@%s:%s/%s"

PWD="$(pwd)"
echo ${PWD}

# Use nmap to scan 192.168.8.0/24 network and save results in xml file.

nmap -sn "${BEELINELAN}" -oN "${FOLDER}/${OUTPUTFILE}" > /dev/null

# Set variables
ISFOUND="0"
IPADDRESS=""
HOSTNAME=""

# Reading file line by line.

while IFS= read -r line; do
  if [[ "${line}" =~ "Nmap scan report for" ]]; then
    LOOPIPADDRESS=""
    LOOPMACADDRESS=""
    if [[ "${line}" =~ [\(\)] ]]; then
      LOOPIPADDRESS="$(echo ${line} | awk '{ print $6 }')"
      LOOPIPADDRESS="$(echo ${LOOPIPADDRESS:1})"
      LOOPIPADDRESS="$(echo ${LOOPIPADDRESS%?})"
    else
      LOOPIPADDRESS="$(echo ${line} | awk '{ print $5 }')"
    fi
  fi
  if [[ "${line}" =~ "MAC Address:" ]]; then
    LOOPMACADDRESS="$(echo ${line} | awk '{ print $3 }')"
  fi

  if [[ "${LOOPMACADDRESS}" == "${MACADDRESS}" ]]; then
    IPADDRESS="${LOOPIPADDRESS}"
    ISFOUND="1"
  fi
done < "${FOLDER}/${OUTPUTFILE}"

# Get current ip address of camera from frigate config file using yq.
# Then strip rtsp line to ip address.

OLDIPADDRESS="$(yq ".go2rtc.streams.${GO2RTCCAMERANAME}[0]" "${FRIGATECONFIGFILE}")"
OLDIPADDRESS="$(echo $OLDIPADDRESS | sed 's%rtsp://%%')"
OLDIPADDRESS="$(echo $OLDIPADDRESS | sed "s%:${RTSPPORT}%%")"
OLDIPADDRESS="$(echo $OLDIPADDRESS | sed "s%/${RTSPPATH}%%")"
OLDIPADDRESS="$(echo $OLDIPADDRESS | sed "s%${RTSPUSER}:%%")"
OLDIPADDRESS="$(echo $OLDIPADDRESS | sed "s%${RTSPPASS}@%%")"

if [[ "${ISFOUND}" == "1" ]]; then
  if [[ "${IPADDRESS}" != "${OLDIPADDRESS}" ]]; then
    CURRENTRTSPSTRING="$(printf "${RTSPSTRING}" "${RTSPUSER}" "${RTSPPASS}" "${IPADDRESS}" "${RTSPPORT}" "${RTSPPATH}")"
    yq -i ".go2rtc.streams.${GO2RTCCAMERANAME}[0] = \"${CURRENTRTSPSTRING}\"" "${FRIGATECONFIGFILE}"

    cd "${DOCKERCOMPOSEFILE}"
    docker compose down -v frigate
    docker compose up -d frigate
    cd "${PWD}"
  fi
fi