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select、poll、epoll之间的区别总结[整理] - C/C++ - 清泛网 - 专注C/C++及内核技术
...这个poll方法是sock_poll，sock_poll根据情况会调用到tcp_poll,udp_poll或者datagram_poll）
（4）以tcp_poll为例，其核心实现就是__pollwait，也就是上面注册的回调函数。
（5）__pollwait的主要工作就是把current（当前进程）挂到设备的等待队列...
Keep-alive header clarification
...orward the packet accordingly, so it doesn't go up to transport layer (TCP/UDP), nor it go the application layer to see the keep-alive header. So basically keep-alive is explicitly between the client and the server, and implicitly it lets session aware devices -e.g. firewalls- opened to that explic...
Find the PID of a process that uses a port on Windows
... 0.0.0.0:9999 0.0.0.0:0 LISTENING 15776
UDP [fe80::81ad:9999:d955:c4ca%2]:1900 *:* 12331
The most likely candidate usually ends up first, but if the process has ended before you run your script you may end up with PID 12331 instead...
ByteArray 扩展 - 字节数组处理工具 · App Inventor 2 中文网
...网络通信
处理网络协议中的二进制数据，如TCP/UDP数据包的解析和构造。
2. 文件格式处理
读写各种文件格式，如图片、音频、配置文件等。
3. 数据加密
实现简单的加密算法，对数...
Ruby off the rails
...o be displayed and then tells computers in the walls to play the media via UDP.
It's the most reliable part of the entire exhibit.
Ruby was used for the other major part of the exhibit, the Wall though I didn't have much to do with that. Most of the graphics were prototyped in ruby using interface...
Get a specific bit from byte
I have a byte, specifically one byte from a byte array which came in via UDP sent from another device. This byte stores the on/off state of 8 relays in the device.
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How to change port number for apache in WAMP
...08 as common alternative http ports. en.wikipedia.org/wiki/List_of_TCP_and_UDP_port_numbers
– L. L. Learner
Mar 11 '17 at 22:16
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How to test an Internet connection with bash?
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In Bash, using it's network wrapper through /dev/{udp,tcp}/host/port:
if : >/dev/tcp/8.8.8.8/53; then
echo 'Internet available.'
else
echo 'Offline.'
fi
(: is the Bash no-op, because you just want to test the connection, but not processing.)
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Live-stream video from one android phone to another over WiFi
...continuous video but with much less effort.
For communication you may use UDP sockets(Faster and less complex) or DLNA (Not sure how that works).
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SensorUtil 传感器工具扩展：在后台和屏幕关闭时保持传感器工作 · App Inv...
...秒通过 GetValues 方法获取读数
向 255.255.255.255:2222 发送 UDP 广播
使用 UrsSensorAverager 计算 X 值的滚动平均
磁场传感器数据平滑
使用 UrsAverager 组件处理 MagneticFieldSensor 数据（UrsSensorAverager 不支持此传感器）...