udpping
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Details for udpping
Package name
- udpping
License
- MIT
Last updated
- 1 October 2026 - latest/stable
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Source code
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A `gping`-style latency grapher over plain UDP echo (RFC 862) instead of ICMP.
How it works
- Every
--intervalms, a packet containing a fresh GUID (16 bytes) is sent to<host>:<port>. - When a reply arrives, its 16-byte payload is matched back to the GUID that was sent, and the elapsed time is the round-trip time.
- A packet with no reply within
--timeoutms counts as dropped. - Time is divided into
--display-intervalms ticks. Every packet belongs to the tick it was sent in (not the tick its reply lands in), so a tick's column keeps updating with new data even after later ticks have already appeared on screen - a late reply, or a drop, can still land a mark on a column that's scrolled a few positions to the left.
> Note: the target must actually run a UDP echo service that sends > back exactly what it received. Most servers on the internet do not run > this; you'll typically point this at your own echo listener (many > simple ones exist in a few lines of Python/Go/etc.), or a router/appliance > that offers RFC 862 echo.
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