Changeset

--- a/mod_proxy65/mod_proxy65.lua	Sat Apr 28 19:44:42 2012 +0100
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,269 +0,0 @@
--- Copyright (C) 2009 Thilo Cestonaro
--- 
--- This project is MIT/X11 licensed. Please see the
--- COPYING file in the source package for more information.
---
---[[
-* to restart the proxy in the console: e.g.
-module:unload("proxy65");
-> server.removeserver(<proxy65_port>);
-module:load("proxy65", <proxy65_jid>);
-]]--
-
-if module:get_host_type() ~= "component" then
-	error("proxy65 should be loaded as a component, please see http://prosody.im/doc/components", 0);
-end
-
-local jid_split = require "util.jid".split;
-local st = require "util.stanza";
-local componentmanager = require "core.componentmanager";
-local config_get = require "core.configmanager".get;
-local connlisteners = require "net.connlisteners";
-local sha1 = require "util.hashes".sha1;
-
-local host, name = module:get_host(), "SOCKS5 Bytestreams Service";
-local sessions, transfers, component, replies_cache = {}, {}, nil, {};
-
-local proxy_port = config_get(host, "core", "proxy65_port") or 5000;
-local proxy_interface = config_get(host, "core", "proxy65_interface") or "*";
-local proxy_address = config_get(host, "core", "proxy65_address") or (proxy_interface ~= "*" and proxy_interface) or host;
-local proxy_acl = config_get(host, "core", "proxy65_acl");
-
-local connlistener = { default_port = proxy_port, default_interface = proxy_interface, default_mode = "*a" };
-
-function connlistener.listener(conn, data)
-	local session = sessions[conn] or {};
-	
-	if session.setup == nil and data ~= nil and data:sub(1):byte() == 0x05 and data:len() > 2 then
-		local nmethods = data:sub(2):byte();
-		local methods = data:sub(3);
-		local supported = false;
-		for i=1, nmethods, 1 do
-			if(methods:sub(i):byte() == 0x00) then -- 0x00 == method: NO AUTH
-				supported = true;
-				break;
-			end
-		end
-		if(supported) then
-			module:log("debug", "new session found ... ")
-			session.setup = true;
-			sessions[conn] = session;
-			conn.write(string.char(5, 0));
-		end
-		return;
-	end
-	if session.setup then
-		if session.sha ~= nil and transfers[session.sha] ~= nil then
-			local sha = session.sha;
-			if transfers[sha].activated == true and transfers[sha].initiator == conn and transfers[sha].target ~= nil then
-				transfers[sha].target.write(data);
-				return;
-			end
-		end
-		if data ~= nil and data:len() == 0x2F and  -- 40 == length of SHA1 HASH, and 7 other bytes => 47 => 0x2F
-			data:sub(1):byte() == 0x05 and -- SOCKS5 has 5 in first byte
-			data:sub(2):byte() == 0x01 and -- CMD must be 1
-			data:sub(3):byte() == 0x00 and -- RSV must be 0
-			data:sub(4):byte() == 0x03 and -- ATYP must be 3
-			data:sub(5):byte() == 40 and -- SHA1 HASH length must be 40 (0x28)
-			data:sub(-2):byte() == 0x00 and -- PORT must be 0, size 2 byte
-			data:sub(-1):byte() == 0x00 		
-		then
-			local sha = data:sub(6, 45); -- second param is not count! it's the ending index (included!)
-			if transfers[sha] == nil then
-				transfers[sha] = {};
-				transfers[sha].activated = false;
-				transfers[sha].target = conn;
-				session.sha = sha;
-				module:log("debug", "target connected ... ");
-			elseif transfers[sha].target ~= nil then
-				transfers[sha].initiator = conn;
-				session.sha = sha;
-				module:log("debug", "initiator connected ... ");
-			end
-			conn.write(string.char(5, 0, 0, 3, sha:len()) .. sha .. string.char(0, 0)); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte)
-		else
-			log:module("warn", "Neither data transfer nor initial connect of a participator of a transfer.")
-			conn.close();
-		end
-	else
-		if data ~= nil then
-			module:log("warn", "unknown connection with no authentication data -> closing it");
-			conn.close();
-		end
-	end
-end
-
-function connlistener.disconnect(conn, err)
-	local session = sessions[conn];
-	if session then
-		if session.sha and transfers[session.sha] then
-			local initiator, target = transfers[session.sha].initiator, transfers[session.sha].target;
-			if initiator == conn and target ~= nil then
-				target.close();
-			elseif target == conn and initiator ~= nil then
-			 	initiator.close();
-			end
-			transfers[session.sha] = nil;
-		end
-		-- Clean up any session-related stuff here
-		sessions[conn] = nil;
-	end
-end
-
-local function get_disco_info(stanza)
-	local reply = replies_cache.disco_info;
-	if reply == nil then
-	 	reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#info")
-			:tag("identity", {category='proxy', type='bytestreams', name=name}):up()
-			:tag("feature", {var="http://jabber.org/protocol/bytestreams"});
-		replies_cache.disco_info = reply;
-	end
-
-	reply.attr.id = stanza.attr.id;
-	reply.attr.to = stanza.attr.from;
-	return reply;
-end
-
-local function get_disco_items(stanza)
-	local reply = replies_cache.disco_items;
-	if reply == nil then
-	 	reply = st.iq({type='result', from=host}):query("http://jabber.org/protocol/disco#items");
-		replies_cache.disco_items = reply;
-	end
-	
-	reply.attr.id = stanza.attr.id;
-	reply.attr.to = stanza.attr.from;
-	return reply;
-end
-
-local function _jid_join(node, host, resource)
-	local ret = host;
-	if ret then
-		if node then
-			ret = node .. "@" .. ret;
-		end
-		if resource then
-			ret = ret .. "/" .. resource;
-		end
-	end
-	return ret;
-end
-
-local function get_stream_host(origin, stanza)
-	local reply = replies_cache.stream_host;
-	local err_reply = replies_cache.stream_host_err;
-	local sid = stanza.tags[1].attr.sid;
-	local allow = false;
-	local jid_node, jid_host, jid_resource = jid_split(stanza.attr.from);
-	
-	if stanza.attr.from == nil then
-		jid_node = origin.username;
-		jid_host = origin.host;
-		jid_resource = origin.resource;
-	end
-	
-	if proxy_acl and #proxy_acl > 0 then
-		if host ~= nil then -- at least a domain is needed.
-			for _, acl in ipairs(proxy_acl) do
-				local acl_node, acl_host, acl_resource = jid_split(acl);
-				if ((acl_node ~= nil and acl_node == jid_node) or acl_node == nil) and
-				   ((acl_host ~= nil and acl_host == jid_host) or acl_host == nil) and
-				   ((acl_resource ~= nil and acl_resource == jid_resource) or acl_resource == nil) then
-					allow = true;
-				end
-			end
-		end
-	else
-		allow = true;
-	end
-	if allow == true then
-		if reply == nil then
-			reply = st.iq({type="result", from=host})
-				:query("http://jabber.org/protocol/bytestreams")
-				:tag("streamhost", {jid=host, host=proxy_address, port=proxy_port});
-			replies_cache.stream_host = reply;
-		end
-	else
-		module:log("warn", "Denying use of proxy for %s", tostring(_jid_join(jid_node, jid_host, jid_resource)));
-		if err_reply == nil then
-			err_reply = st.iq({type="error", from=host})
-				:query("http://jabber.org/protocol/bytestreams")
-				:tag("error", {code='403', type='auth'})
-				:tag("forbidden", {xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'});
-			replies_cache.stream_host_err = err_reply;
-		end
-		reply = err_reply;
-	end
-	reply.attr.id = stanza.attr.id;
-	reply.attr.to = stanza.attr.from;
-	reply.tags[1].attr.sid = sid;
-	return reply;
-end
-
-module.unload = function()
-	componentmanager.deregister_component(host);
-	connlisteners.deregister(module.host .. ':proxy65');
-end
-
-local function set_activation(stanza)
-	local from, to, sid, reply = nil;
-	from = stanza.attr.from;
-	if stanza.tags[1] ~= nil and tostring(stanza.tags[1].name) == "query" then
-		if stanza.tags[1].attr ~= nil then
-			sid = stanza.tags[1].attr.sid;
-		end
-		if stanza.tags[1].tags[1] ~= nil and tostring(stanza.tags[1].tags[1].name) == "activate" then
-			to = stanza.tags[1].tags[1][1];
-		end
-	end
-	if from ~= nil and to ~= nil and sid ~= nil then
-		reply = st.iq({type="result", from=host, to=from});
-		reply.attr.id = stanza.attr.id;
-	end
-	return reply, from, to, sid;
-end
-
-function handle_to_domain(origin, stanza)
-	local to_node, to_host, to_resource = jid_split(stanza.attr.to);
-	if to_node == nil then
-		local type = stanza.attr.type;
-		if type == "error" or type == "result" then return; end
-		if stanza.name == "iq" and type == "get" then
-			local xmlns = stanza.tags[1].attr.xmlns
-			if xmlns == "http://jabber.org/protocol/disco#info" then
-				origin.send(get_disco_info(stanza));
-				return true;
-			elseif xmlns == "http://jabber.org/protocol/disco#items" then
-				origin.send(get_disco_items(stanza));
-				return true;
-			elseif xmlns == "http://jabber.org/protocol/bytestreams" then
-				origin.send(get_stream_host(origin, stanza));
-				return true;
-			end
-		elseif stanza.name == "iq" and type == "set" then
-			local reply, from, to, sid = set_activation(stanza);
-			if reply ~= nil and from ~= nil and to ~= nil and sid ~= nil then
-				local sha = sha1(sid .. from .. to, true);
-				if transfers[sha] == nil then
-					module:log("warn", "Recieved request to activate transfer with no participants");
-					module:log("debug", "The sha1 of the transfer which should be activated was: %s", sha);
-				elseif(transfers[sha] ~= nil and transfers[sha].initiator ~= nil and transfers[sha].target ~= nil) then
-					origin.send(reply);
-					transfers[sha].activated = true;
-				end
-			else
-				module:log("error", "activation failed: sid: %s, initiator: %s, target: %s", tostring(sid), tostring(from), tostring(to));
-			end
-		end
-	end
-	return;
-end
-
-if not connlisteners.register(module.host .. ':proxy65', connlistener) then
-	error("mod_proxy65: Could not establish a connection listener. Check your configuration please.");
-	error(" one possible cause for this would be that two proxy65 components share the same port.");
-end
-
-connlisteners.start(module.host .. ':proxy65');
-component = componentmanager.register_component(host, handle_to_domain);