prosody
233196135048
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 11034:233196135048

mod_component: Reply with a different error when not connected The wait, service-unavailable is overloaded by XEP-0045 to mean that the room has reached the maximum number of users. See #1495. Bouncing errors for components is tricky since there is no way to tell that it comes from the server hosting the component, not from the other end of the component connection.
author Kim Alvefur <zash@zash.se>
date Mon, 13 Apr 2020 02:46:03 +0200
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;
};