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What is a “callback” in C and how are they implemented?

...ack is invoked. In the following program we create a socket to listen for TCP connection requests and when a request is received, the function doing the listening then invokes the callback function provided. This simple application can be exercised by running it in one window while using the telnet...
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MySQL show current connection info

...ver (GPL) Protocol version: 10 Connection: localhost via TCP/IP Server characterset: latin1 Db characterset: latin1 Client characterset: gbk Conn. characterset: gbk TCP port: 3306 Uptime: 7 min 16 sec Threads: 1 Questions: 21 Slow q...
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What is “overhead”?

...being used. Examples: Protocol overhead: Ethernet frames, IP packets and TCP segments all have headers, TCP connections require handshake packets. Thus, you cannot use the entire bandwidth the hardware is capable of for your actual data. You can reduce the overhead by using larger packet sizes and...
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Minimal web server using netcat

...can respond to the request. A web session should go something like this. TCP session is established. Browser Request Header: GET / HTTP/1.1 Browser Request Header: Host: www.google.com Browser Request Header: \n #Note: Browser is telling Webserver that the request header is complete. Server Respon...
https://www.tsingfun.com/it/bigdata_ai/1073.html 

初窥InnoDB的Memcached插件 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...cho "stats" | nc localhost 11211 换句话说,MySQL已经兼容Memcached协议,可以直接使用Memcached命令。 配置 在安装步骤里,我们导入了一个名为innodb_memcached_config.sql的脚本,它除了导入测试数据外,还创建了Memcached插件所需要的配置信...
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Using node.js as a simple web server

...ould make sure the port is open to the world, e.g.: iptables -I INPUT 1 -p tcp --dport 60090 -j ACCEPT (on many Linux systems) – Blisterpeanuts Dec 11 '17 at 22:57 ...
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Mac OSX Lion DNS lookup order [closed]

...or otherwise), no AAAA query is issued, as it seems to be satisfied that a TCP connection was at least possible. On a related note, if you make heavy use of the hosts file (for adblocking, local web development, etc), you may want to look into running your own local DNS resolver. There is a consi...
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Convert line-endings for whole directory tree (Git)

...rom the web sfk webrequest - send HTTP request to a server sfk tcpdump - print TCP conversation between programs sfk udpdump - print incoming UDP requests sfk udpsend - send UDP requests sfk ip - tell own machine's IP address(es). ...
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Can I run multiple programs in a Docker container?

...ever. With two different containers, the two parts still communicate over TCP/IP, but unless the ports have been locked down specifically (not recommended, as you'd be unable to run more than one copy), you would have to pass the new port that the database has been exposed as to the application, so...
https://www.tsingfun.com/it/cpp/1947.html 

进程间通信(IPC)的几种方式 - C/C++ - 清泛网 - 专注C/C++及内核技术

...三种:1)普通管道PIPE, 通常有种限制,一是半双工,只能单向传输;二是只能在父子进程间使用. 2)流管道s_pipe: 去除了第一种限制,可以双向传输. 3)命名管道:name_pipe, 去除了第二种限制,可以在许多并不相关的进程之间进行通讯. 系统IPC...