net snmp

 /etc/snmp/snmpd.conf

rocommunity public

agentAddress udp:161

pass .1.3.6.1.4.1.55554 /bin/bash /snmp.sh

 /snmp.sh

#!/bin/bash

opt=$1

oid=$2

echo "$(date) - called with opt=$opt oid=$oid" >> /tmp/snmp_script.log

if [ "$opt" = "-g" ]; then

  case "$oid" in

    ".1.3.6.1.4.1.55554.1.1.0")

      echo "$oid"

      echo "INTEGER"

      echo "1"

      ;;

    ".1.3.6.1.4.1.55554.1.2.0")

      echo "$oid"

      echo "STRING"

      echo "IPCamModelX"

      ;;

    *)

      exit 1

      ;;

  esac

elif [ "$opt" = "-n" ]; then

  # 簡單示範，回傳下一個 OID

  if [ "$oid" = ".1.3.6.1.4.1.55554.1.1.0" ]; then

    echo ".1.3.6.1.4.1.55554.1.2.0"

    echo "STRING"

    echo "IPCamModelX"

  else

    exit 1

  fi

elif [ "$opt" = "-s" ]; then

  # 如果要支援 set，這邊寫set邏輯

  exit 1

else

  exit 1

fi

Agent

 /usr/sbin/snmpd -V -f -Lo -C -c /etc/snmp/snmpd.conf -Dpass,persist,mib_modules

Client

snmpwalk -v2c -c public localhost .1.3.6.1.4.1.55554.1.1.0

Output

iso.3.6.1.4.1.55554.1.1.0 = INTEGER: 1

Pure RTSP over Websocket Player build in browser

 https://anzal.hashnode.dev/a-beginners-guide-to-rtsp-streaming-with-websockets-using-nodejs-and-ffmpeg

A Beginner’s Guide to RTSP Streaming with WebSockets Using Node.js and FFmpeg.