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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 function softreq(...) local ok, lib = pcall(require, ...); if ok then return lib; else return nil, lib; end end
local platform_table = require "util.human.io".table({ { width = 15, align = "right" }, { width = "100%" } });
-- Required to be able to find packages installed with luarocks
if not softreq "luarocks.loader" then -- LuaRocks 2.x
softreq "luarocks.require"; -- LuaRocks <1.x
end
local function missingdep(name, sources, msg, err) -- luacheck: ignore err
-- TODO print something about the underlying error, useful for debugging
print("");
print("**************************");
print("Prosody was unable to find "..tostring(name));
print("This package can be obtained in the following ways:");
print("");
for _, row in ipairs(sources) do
print(platform_table(row));
end
print("");
print(msg or (name.." is required for Prosody to run, so we will now exit."));
print("More help can be found on our website, at https://prosody.im/doc/depends");
print("**************************");
print("");
end
local function check_dependencies()
if _VERSION < "Lua 5.1" then
print "***********************************"
print("Unsupported Lua version: ".._VERSION);
print("At least Lua 5.1 is required.");
print "***********************************"
return false;
end
local fatal;
local lxp, err = softreq "lxp"
if not lxp then
missingdep("luaexpat", {
{ "Debian/Ubuntu", "sudo apt install lua-expat" };
{ "luarocks", "luarocks install luaexpat" };
{ "Source", "http://matthewwild.co.uk/projects/luaexpat/" };
}, nil, err);
fatal = true;
end
local socket, err = softreq "socket"
if not socket then
missingdep("luasocket", {
{ "Debian/Ubuntu", "sudo apt install lua-socket" };
{ "luarocks", "luarocks install luasocket" };
{ "Source", "http://www.tecgraf.puc-rio.br/~diego/professional/luasocket/" };
}, nil, err);
fatal = true;
elseif not socket.tcp4 then
-- COMPAT LuaSocket before being IP-version agnostic
socket.tcp4 = socket.tcp;
socket.udp4 = socket.udp;
end
local lfs, err = softreq "lfs"
if not lfs then
missingdep("luafilesystem", {
{ "luarocks", "luarocks install luafilesystem" };
{ "Debian/Ubuntu", "sudo apt install lua-filesystem" };
{ "Source", "http://www.keplerproject.org/luafilesystem/" };
}, nil, err);
fatal = true;
end
local ssl, err = softreq "ssl"
if not ssl then
missingdep("LuaSec", {
{ "Debian/Ubuntu", "sudo apt install lua-sec" };
{ "luarocks", "luarocks install luasec" };
{ "Source", "https://github.com/brunoos/luasec" };
}, "SSL/TLS support will not be available", err);
end
local bit, err = softreq"util.bitcompat";
if not bit then
missingdep("lua-bitops", {
{ "Debian/Ubuntu", "sudo apt install lua-bitop" };
{ "luarocks", "luarocks install luabitop" };
{ "Source", "http://bitop.luajit.org/" };
}, "WebSocket support will not be available", err);
end
local unbound, err = softreq"lunbound"; -- luacheck: ignore 211/err
if not unbound then
missingdep("lua-unbound", {
{ "Debian/Ubuntu", "sudo apt install lua-unbound" };
{ "luarocks", "luarocks install luaunbound" };
{ "Source", "https://www.zash.se/luaunbound.html" };
}, "Old DNS resolver library will be used", err);
else
package.preload["net.adns"] = function ()
local ub = require "net.unbound";
return ub;
end
end
local encodings, err = softreq "util.encodings"
if not encodings then
if err:match("module '[^']*' not found") then
missingdep("util.encodings", {
{ "Windows", "Make sure you have encodings.dll from the Prosody distribution in util/" };
{ "GNU/Linux", "Run './configure' and 'make' in the Prosody source directory to build util/encodings.so" };
});
else
print "***********************************"
print("util/encodings couldn't be loaded. Check that you have a recent version of libidn");
print ""
print("The full error was:");
print(err)
print "***********************************"
end
fatal = true;
end
local hashes, err = softreq "util.hashes"
if not hashes then
if err:match("module '[^']*' not found") then
missingdep("util.hashes", {
{ "Windows", "Make sure you have hashes.dll from the Prosody distribution in util/" };
{ "GNU/Linux", "Run './configure' and 'make' in the Prosody source directory to build util/hashes.so" };
});
else
print "***********************************"
print("util/hashes couldn't be loaded. Check that you have a recent version of OpenSSL (libcrypto in particular)");
print ""
print("The full error was:");
print(err)
print "***********************************"
end
fatal = true;
end
return not fatal;
end
local function log_warnings()
if _VERSION > "Lua 5.4" then
prosody.log("warn", "Support for %s is experimental, please report any issues", _VERSION);
elseif _VERSION < "Lua 5.2" then
prosody.log("warn", "%s has several issues and support is being phased out, consider upgrading", _VERSION);
end
local ssl = softreq"ssl";
if ssl then
local major, minor, veryminor, patched = ssl._VERSION:match("(%d+)%.(%d+)%.?(%d*)(M?)");
if not major or ((tonumber(major) == 0 and (tonumber(minor) or 0) <= 3 and (tonumber(veryminor) or 0) <= 2) and patched ~= "M") then
prosody.log("error", "This version of LuaSec contains a known bug that causes disconnects, see https://prosody.im/doc/depends");
end
end
local lxp = softreq"lxp";
if lxp then
if not pcall(lxp.new, { StartDoctypeDecl = false }) then
prosody.log("error", "The version of LuaExpat on your system leaves Prosody "
.."vulnerable to denial-of-service attacks. You should upgrade to "
.."LuaExpat 1.3.0 or higher as soon as possible. See "
.."https://prosody.im/doc/depends#luaexpat for more information.");
end
if not lxp.new({}).getcurrentbytecount then
prosody.log("error", "The version of LuaExpat on your system does not support "
.."stanza size limits, which may leave servers on untrusted "
.."networks (e.g. the internet) vulnerable to denial-of-service "
.."attacks. You should upgrade to LuaExpat 1.3.0 or higher as "
.."soon as possible. See "
.."https://prosody.im/doc/depends#luaexpat for more information.");
end
end
end
return {
softreq = softreq;
missingdep = missingdep;
check_dependencies = check_dependencies;
log_warnings = log_warnings;
};
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