1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
-- 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
-- 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(string.format("%15s | %s", table.unpack(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 5.2" then
print "***********************************"
print("Unsupported Lua version: ".._VERSION);
print("At least Lua 5.2 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" };
}, nil, err);
end
local bit, err = softreq"prosody.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["prosody.net.adns"] = function ()
local ub = require "prosody.net.unbound";
return ub;
end
end
local encodings, err = softreq "prosody.util.encodings"
if not encodings then
if err:match("module '[^']*' not found") then
missingdep("prosody.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 "prosody.util.hashes"
if not hashes then
if err:match("module '[^']*' not found") then
missingdep("prosody.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 support is deprecated, upgrade as soon as possible", _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;
};
|
