Skip to main content

Search

Items tagged with: udp


 

ESP8266 Upgrade Gives IKEA LEDs UDP Superpowers


Image/Photo

#ledhacks #microcontrollers #networkhacks #esp03 #ikea #ledlighting #mosfet #udp #voltageregulator #hackaday
posted by pod_feeder_v2
ESP8266 Upgrade Gives IKEA LEDs UDP Superpowers


 

Article: Network Redirections in Bash.


by Anmol Sarma - software developer from Bengaluru ( #India ).

Preview/extract:

[...] it sends a UDP datagram containing a random number to port 1234 every 250 ms.

while true; do echo $RANDOM > /dev/udp/127.0.0.1/1234; sleep 0.25; done

I didn’t recall ever seeing a /dev/udp and so was a bit surprised that it worked.
Seemingly, a normal UDP socket was being created and written to using the regular sycall interface. That refuted my initial suspicion that some kind of a special file backed by the kernel was involved.
But who was actually creating the socket?
A peek at Bash’s code answered that question [...]

Tags: #linux #bash #ksh #scripting #script #networking #hacking #coding #code #codeanalyse #development #syscall #udp #tcp.


 
Classique attaque réflexion+amplification, grâce à #memcached. #UDP #Coriin

memcached fournit le meilleur rapport d'amplification de tous les protocoles vulnérables (SNMP, DNS, NTP).


 
Next version of #HTTP — HTTP/3 — will use #QUIC. (Over #UDP, encrypted by default, intended as a replacement for #TCP and #TLS.)

https://daniel.haxx.se/blog/2018/11/11/http-3/

(via https://toot.cafe/@tomayac/101058921775393699)
Image/Photo


 
We all know that #UDP does not guarantee the ordering of packets. But, in the real world, does reordering really happen? Measures with Chrome: 5 % client-side, 9 % server-side (no explanation for the ≠)

#IETF102


 
Instead of #DNS cookies, why not simply moving to TCP? Long discussion (people feel strongly about cookies). #UDP #IETF102