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.

内存泄漏定位工具之 valgrind

 https://blog.csdn.net/weixin_45631738/article/details/129541098?utm_medium=distribute.pc_relevant.none-task-blog-2~default~baidujs_baidulandingword~default-1-129541098-blog-124682490.235^v43^pc_blog_bottom_relevance_base8&spm=1001.2101.3001.4242.2&utm_relevant_index=4

Free scrum board

1. Redmine
1.  Redmine Plugins & Themes 介紹：那些我成功安裝的外掛
2. Plugins Directory » Redmine Dashboard
3. 如何用 Redmine 做專案管理＆體驗心得
4. 
   
   
   
2. OpenProject
1. 
   
   
   
3. Asana
1. 
   
   
   
2. 2G only
4. Gitlab
1. 
   
   
   
5. JIRA
1. 10G only

libevent timer

https://www.cnblogs.com/osbreak/p/17823102.html

 #include <iostream>

#include <event2/event.h> #include <signal.h> using namespace std; void timer(int sockfd, short what, void* arg) { cout << "[timer2]" << endl; } int main(int argc, char* argv[]) { event_base* base = event_base_new(); // 持久事件 event *ev = event_new(base,-1,EV_PERSIST,timer,0); //超时优化性能优化，默认event 用二叉堆存储（完全二叉树） 插入删除O（logn） //优化到双向队列 插入删除O（1） static timeval tv_in = {3,0}; const timeval *t; t = event_base_init_common_timeout(base,&tv_in); event_add(ev3,t3); // 性能优化：插入性能 O(1) // 进入事件主循环 event_base_dispatch(base); event_base_free(base); return 0; }

valgrind compilation

 https://blog.csdn.net/HZHejo/article/details/124682490

Check libraries dependence

 

Ref: https://albert-oma.blogspot.com/

check libraries dependence:

$ arm-linux-gnueabihf-readelf -d ./gst-launch-1.0