prosody
3f49c35607ca
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 11936:3f49c35607ca

mod_smacks: Fix timer lifetimes to follow session instead of module module:add_timer() creates a timer that stops working after the module is reloaded or unloaded, in order to prevent leaks. However, when the timers control vital session behavior, breakage occurs after reload. E.g. sessions would stop requesting acks and stop responding to acks.
author Kim Alvefur <zash@zash.se>
date Wed, 24 Nov 2021 21:27:45 +0100
parent 7078:ec17115e3721
child 12355:a0ff5c438e9d
line wrap: on
line source

-- Prosody IM
-- Copyright (C) 2008-2010 Matthew Wild
-- Copyright (C) 2008-2010 Waqas Hussain
--
-- This project is MIT/X11 licensed. Please see the
-- COPYING file in the source package for more information.
--

local random = require "util.random";
local random_bytes = random.bytes;
local hex = require "util.hex".to;
local m_ceil = math.ceil;

local function get_nibbles(n)
	return hex(random_bytes(m_ceil(n/2))):sub(1, n);
end

local function get_twobits()
	return ("%x"):format(random_bytes(1):byte() % 4 + 8);
end

local function generate()
	-- generate RFC 4122 complaint UUIDs (version 4 - random)
	return get_nibbles(8).."-"..get_nibbles(4).."-4"..get_nibbles(3).."-"..(get_twobits())..get_nibbles(3).."-"..get_nibbles(12);
end

return {
	get_nibbles=get_nibbles;
	generate = generate ;
	-- COMPAT
	seed = random.seed;
};