prosody
a2bd6e85a457
util/uuid.lua

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Software / code / prosody

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util/uuid.lua @ 10654:a2bd6e85a457

mod_ping: Fix double response to internal ping When responding to a ping from elsewhere in the same Prosody the send function will be host_send from core.hostmanager, which does not return anything. Tailcalling it therefore lets the iq event fall trough to handle_unhandled_stanza in core.stanza_router, which responds with an error. This error also goes into handle_unhandled_stanza which discards it. Noticed because I have a module that points out when a stanza error reply is created without a text argument.
author Kim Alvefur <zash@zash.se>
date Fri, 21 Feb 2020 23:30:47 +0100
parent 7078:ec17115e3721
child 12355:a0ff5c438e9d
line wrap: on
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-- 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;
};