2 -- Copyright (C) 2008-2011 Matthew Wild
3 -- Copyright (C) 2008-2011 Waqas Hussain
4 -- Copyright (C) 2009 Thilo Cestonaro
6 -- This project is MIT/X11 licensed. Please see the
7 -- COPYING file in the source package for more information.
12 local jid_compare, jid_prep = require "util.jid".compare, require "util.jid".prep;
13 local st = require "util.stanza";
14 local sha1 = require "util.hashes".sha1;
15 local b64 = require "util.encodings".base64.encode;
16 local server = require "net.server";
17 local portmanager = require "core.portmanager";
19 local sessions, transfers = module:shared("sessions", "transfers");
20 local max_buffer_size = 4096;
24 function listener.onincoming(conn, data)
25 local session = sessions[conn] or {};
27 local transfer = transfers[session.sha];
28 if transfer and transfer.activated then -- copy data between initiator and target
29 local initiator, target = transfer.initiator, transfer.target;
30 (conn == initiator and target or initiator):write(data);
32 end -- FIXME server.link should be doing this?
34 if not session.greeting_done then
35 local nmethods = data:byte(2) or 0;
36 if data:byte(1) == 0x05 and nmethods > 0 and #data == 2 + nmethods then -- check if we have all the data
37 if data:find("%z") then -- 0x00 = 'No authentication' is supported
38 session.greeting_done = true;
39 sessions[conn] = session;
40 conn:write("\5\0"); -- send (SOCKS version 5, No authentication)
41 module:log("debug", "SOCKS5 greeting complete");
44 end -- else error, unexpected input
45 conn:write("\5\255"); -- send (SOCKS version 5, no acceptable method)
47 module:log("debug", "Invalid SOCKS5 greeting recieved: '%s'", b64(data));
48 else -- connection request
49 --local head = string.char( 0x05, 0x01, 0x00, 0x03, 40 ); -- ( VER=5=SOCKS5, CMD=1=CONNECT, RSV=0=RESERVED, ATYP=3=DOMAIMNAME, SHA-1 size )
50 if #data == 47 and data:sub(1,5) == "\5\1\0\3\40" and data:sub(-2) == "\0\0" then
51 local sha = data:sub(6, 45);
53 conn:write("\5\0\0\3\40" .. sha .. "\0\0"); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
54 if not transfers[sha] then
56 transfers[sha].target = conn;
58 module:log("debug", "SOCKS5 target connected for session %s", sha);
59 else -- transfers[sha].target ~= nil
60 transfers[sha].initiator = conn;
62 module:log("debug", "SOCKS5 initiator connected for session %s", sha);
63 server.link(conn, transfers[sha].target, max_buffer_size);
64 server.link(transfers[sha].target, conn, max_buffer_size);
66 else -- error, unexpected input
67 conn:write("\5\1\0\3\0\0\0"); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
69 module:log("debug", "Invalid SOCKS5 negotiation recieved: '%s'", b64(data));
74 function listener.ondisconnect(conn, err)
75 local session = sessions[conn];
77 if transfers[session.sha] then
78 local initiator, target = transfers[session.sha].initiator, transfers[session.sha].target;
79 if initiator == conn and target ~= nil then
81 elseif target == conn and initiator ~= nil then
84 transfers[session.sha] = nil;
86 -- Clean up any session-related stuff here
91 function module.add_host(module)
92 local host, name = module:get_host(), module:get_option_string("name", "SOCKS5 Bytestreams Service");
94 local proxy_address = module:get_option_string("proxy65_address", host);
95 local proxy_port = next(portmanager.get_active_services():search("proxy65", nil)[1] or {});
96 local proxy_acl = module:get_option_array("proxy65_acl");
98 -- COMPAT w/pre-0.9 where proxy65_port was specified in the components section of the config
99 local legacy_config = module:get_option_number("proxy65_port");
100 if legacy_config then
101 module:log("warn", "proxy65_port is deprecated, please put proxy65_ports = { %d } into the global section instead", legacy_config);
104 module:depends("disco");
105 module:add_identity("proxy", "bytestreams", name);
106 module:add_feature("http://jabber.org/protocol/bytestreams");
108 module:hook("iq-get/host/http://jabber.org/protocol/bytestreams:query", function(event)
109 local origin, stanza = event.origin, event.stanza;
112 while proxy_acl and #proxy_acl > 0 do -- using 'while' instead of 'if' so we can break out of it
113 local jid = stanza.attr.from;
115 for _, acl in ipairs(proxy_acl) do
116 if jid_compare(jid, acl) then allow = true; break; end
118 if allow then break; end
119 module:log("warn", "Denying use of proxy for %s", tostring(stanza.attr.from));
120 origin.send(st.error_reply(stanza, "auth", "forbidden"));
124 local sid = stanza.tags[1].attr.sid;
125 origin.send(st.reply(stanza):tag("query", {xmlns="http://jabber.org/protocol/bytestreams", sid=sid})
126 :tag("streamhost", {jid=host, host=proxy_address, port=proxy_port}));
130 module:hook("iq-set/host/http://jabber.org/protocol/bytestreams:query", function(event)
131 local origin, stanza = event.origin, event.stanza;
133 local query = stanza.tags[1];
134 local sid = query.attr.sid;
135 local from = stanza.attr.from;
136 local to = query:get_child_text("activate");
137 local prepped_to = jid_prep(to);
139 local info = "sid: "..tostring(sid)..", initiator: "..tostring(from)..", target: "..tostring(prepped_to or to);
140 if prepped_to and sid then
141 local sha = sha1(sid .. from .. prepped_to, true);
142 if not transfers[sha] then
143 module:log("debug", "Activation request has unknown session id; activation failed (%s)", info);
144 origin.send(st.error_reply(stanza, "modify", "item-not-found"));
145 elseif not transfers[sha].initiator then
146 module:log("debug", "The sender was not connected to the proxy; activation failed (%s)", info);
147 origin.send(st.error_reply(stanza, "cancel", "not-allowed", "The sender (you) is not connected to the proxy"));
148 --elseif not transfers[sha].target then -- can't happen, as target is set when a transfer object is created
149 -- module:log("debug", "The recipient was not connected to the proxy; activation failed (%s)", info);
150 -- origin.send(st.error_reply(stanza, "cancel", "not-allowed", "The recipient is not connected to the proxy"));
151 else -- if transfers[sha].initiator ~= nil and transfers[sha].target ~= nil then
152 module:log("debug", "Transfer activated (%s)", info);
153 transfers[sha].activated = true;
154 transfers[sha].target:resume();
155 transfers[sha].initiator:resume();
156 origin.send(st.reply(stanza));
158 elseif to and sid then
159 module:log("debug", "Malformed activation jid; activation failed (%s)", info);
160 origin.send(st.error_reply(stanza, "modify", "jid-malformed"));
162 module:log("debug", "Bad request; activation failed (%s)", info);
163 origin.send(st.error_reply(stanza, "modify", "bad-request"));
169 module:provides("net", {