First commit, where do you want to go tomorrow?

1 files changed, 275 insertions, 0 deletions

diff --git a/main.lua b/main.lua
new file mode 100644
index 00000000..cb6e03fd
--- /dev/null
+++ b/main.lua
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+require "luarocks.require"
+
+require "copas"
+require "socket"
+require "ssl"
+require "lxp"
+
+function log(type, area, message)
+	print(type, area, message);
+end
+
+require "core.stanza_dispatch"
+require "core.rostermanager"
+require "core.offlinemessage"
+require "util.stanza"
+require "util.jid"
+
+-- Locals for faster access --
+local t_insert = table.insert;
+local t_concat = table.concat;
+local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end
+local m_random = math.random;
+local format = string.format;
+local st = stanza;
+------------------------------
+
+users = {};
+hosts = 	{ 
+			["localhost"] = 	{
+							type = "local";
+							connected = true;
+							sessions = {};
+						};
+			["getjabber.ath.cx"] = 	{
+							type = "local";
+							connected = true;
+							sessions = {};
+						};
+		}
+
+local hosts, users = hosts, users;
+
+local ssl_ctx, msg = ssl.newcontext { mode = "server", protocol = "sslv23", key = "/home/matthew/ssl_cert/server.key",
+    certificate = "/home/matthew/ssl_cert/server.crt", capath = "/etc/ssl/certs", verify = "none", }
+        
+if not ssl_ctx then error("Failed to initialise SSL/TLS support: "..tostring(msg)); end
+
+
+function connect_host(host)
+	hosts[host] = { type = "remote", sendbuffer = {} };
+end
+
+function handler(conn)
+	local copas_receive, copas_send = copas.receive, copas.send;
+	local reqdata, sktmsg;
+	local session = { sendbuffer = { external = {} }, conn = conn, notopen = true, priority = 0 }
+
+
+	-- Logging functions --
+
+	local mainlog, log = log;
+	do
+		local conn_name = tostring(conn):match("%w+$");
+		log = function (type, area, message) mainlog(type, conn_name, message); end
+	end
+	local print = function (...) log("info", "core", t_concatall({...}, "\t")); end
+	session.log = log;
+
+	--	--	--
+
+	-- Send buffers --
+
+	local sendbuffer = session.sendbuffer;
+	local send = function (data) return t_insert(sendbuffer, tostring(data)); end;
+	local send_to = 	function (to, stanza)
+					local node, host, resource = jid.split(to);
+					print("Routing stanza to "..to..":", node, host, resource);
+					if not hosts[host] then
+						print("   ...but host offline, establishing connection");
+						connect_host(host);
+						t_insert(hosts[host].sendbuffer, stanza); -- This will be sent when s2s connection succeeds					
+					elseif hosts[host].connected then
+						print("   ...putting in our external send buffer");
+						t_insert(sendbuffer.external, { node = node, host = host, resource = resource, data = stanza});
+						print("   ...there are now "..tostring(#sendbuffer.external).." stanzas in the external send buffer");
+					end
+				end
+	session.send, session.send_to = send, send_to;
+
+	--	--	--
+	print("Client connected");
+	conn = ssl.wrap(copas.wrap(conn), ssl_ctx);
+	
+	do
+		local succ, msg
+		conn:settimeout(15)
+		while not succ do
+			succ, msg = conn:dohandshake()
+			if not succ then
+				print("SSL: "..tostring(msg));
+				if msg == 'wantread' then
+					socket.select({conn}, nil)
+				elseif msg == 'wantwrite' then
+					socket.select(nil, {conn})
+				else
+					-- other error
+				end
+			end
+		end
+	end
+	print("SSL handshake complete");
+	-- XML parser initialisation --
+
+	local parser;
+	local stanza;
+	
+	local stanza_dispatch = init_stanza_dispatcher(session);
+
+	local xml_handlers = {};
+	
+	do
+		local ns_stack = { "" };
+		local curr_ns = "";
+		local curr_tag;
+		function xml_handlers:StartElement(name, attr)
+			curr_ns,name = name:match("^(.+):(%w+)$");
+			print("Tag received:", name, tostring(curr_ns));
+			if not stanza then
+				if session.notopen then
+					if name == "stream" then
+						session.host = attr.to or error("Client failed to specify destination hostname");
+			                        session.version = attr.version or 0;
+			                        session.streamid = m_random(1000000, 99999999);
+			                        print(session, session.host, "Client opened stream");
+			                        send("<?xml version='1.0'?>");
+			                        send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' >", session.streamid, session.host));
+			                        --send("<stream:features>");
+			                        --send("<mechanism>PLAIN</mechanism>");
+        			                --send [[<register xmlns="http://jabber.org/features/iq-register"/> ]]
+        			                --send("</stream:features>");
+						log("info", "core", "Stream opened successfully");
+						session.notopen = nil;
+						return;
+					end
+					error("Client failed to open stream successfully");
+				end
+				if name ~= "iq" and name ~= "presence" and name ~= "message" then
+					error("Client sent invalid top-level stanza");
+				end
+				stanza = st.stanza(name, { to = attr.to, type = attr.type, id = attr.id, xmlns = curr_ns });
+				curr_tag = stanza;
+			else
+				attr.xmlns = curr_ns;
+				stanza:tag(name, attr);
+			end
+		end
+		function xml_handlers:CharacterData(data)
+			if data:match("%S") then
+				stanza:text(data);
+			end
+		end
+		function xml_handlers:EndElement(name)
+			curr_ns,name = name:match("^(.+):(%w+)$");
+			--print("<"..name.."/>", tostring(stanza), tostring(#stanza.last_add < 1), tostring(stanza.last_add[#stanza.last_add].name));
+			if (not stanza) or #stanza.last_add < 0 or (#stanza.last_add > 0 and name ~= stanza.last_add[#stanza.last_add].name) then error("XML parse error in client stream"); end
+			-- Complete stanza
+			print(name, tostring(#stanza.last_add));
+			if #stanza.last_add == 0 then
+				stanza_dispatch(stanza);
+				stanza = nil;
+			else
+				stanza:up();
+			end
+		end
+--[[		function xml_handlers:StartNamespaceDecl(namespace)
+			table.insert(ns_stack, namespace);
+			curr_ns = namespace;
+			log("debug", "parser", "Entering namespace "..tostring(curr_ns));
+		end
+		function xml_handlers:EndNamespaceDecl(namespace)
+			table.remove(ns_stack);
+			log("debug", "parser", "Leaving namespace "..tostring(curr_ns));
+			curr_ns = ns_stack[#ns_stack];
+			log("debug", "parser", "Entering namespace "..tostring(curr_ns));
+		end
+]]
+	end
+	parser = lxp.new(xml_handlers, ":");
+
+	--	--	--
+
+	-- Main loop --
+	print "Receiving..."
+	reqdata = copas_receive(conn, 1);
+	print "Received"
+	while reqdata do
+		parser:parse(reqdata);
+		if #sendbuffer.external > 0 then
+			-- Stanzas queued to go to other places, from us
+			-- ie. other local users, or remote hosts that weren't connected before
+			print(#sendbuffer.external.." stanzas queued for other recipients, sending now...");
+			for n, packet in pairs(sendbuffer.external) do
+				if not hosts[packet.host] then
+					connect_host(packet.host);
+					t_insert(hosts[packet.host].sendbuffer, packet.data);
+				elseif hosts[packet.host].type == "local" then
+					print("   ...is to a local user")
+					local destuser = hosts[packet.host].sessions[packet.node];
+					if destuser and destuser.sessions then
+						if not destuser.sessions[packet.resource] then
+							local best_resource;
+							for resource, session in pairs(destuser.sessions) do
+								if not best_session then best_session = session;
+								elseif session.priority >= best_session.priority and session.priority >= 0 then
+									best_session = session;
+								end
+							end
+							if not best_session then
+								offlinemessage.new(packet.node, packet.host, packet.data);
+							else
+								print("resource '"..packet.resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
+								packet.resource = best_session.resource;
+							end
+						end
+						if destuser.sessions[packet.resource] == session then
+							log("warn", "core", "Attempt to send stanza to self, dropping...");
+						else
+							print("...sending...");
+							copas_send(destuser.sessions[packet.resource].conn, tostring(packet.data));
+							print("...sent")
+						end
+					elseif packet.data.name == "message" then
+						print("   ...will be stored offline");
+						offlinemessage.new(packet.node, packet.host, packet.data);
+					elseif packet.data.name == "iq" then
+						print("   ...is an iq");
+						send(st.reply(packet.data)
+							:tag("error", { type = "cancel" })
+								:tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
+					end
+					print("   ...removing from send buffer");
+					sendbuffer.external[n] = nil;
+				end
+			end
+		end
+		
+		if #sendbuffer > 0 then 
+			for n, data in ipairs(sendbuffer) do
+				print "Sending..."
+				copas_send(conn, data);
+				print "Sent"
+				sendbuffer[n] = nil;
+			end
+		end
+		print "Receiving..."
+		repeat
+			reqdata, sktmsg = copas_receive(conn, 1);
+			if sktmsg == 'wantread' then
+				print("Received... wantread");
+				--socket.select({conn}, nil)
+				--print("Socket ready now...");
+			elseif sktmsg then
+				print("Received socket message:", sktmsg);
+			end
+		until reqdata or sktmsg == "closed";
+		print("Received", tostring(reqdata));
+	end
+	log("info", "core", "Client disconnected, connection closed");
+end
+
+server = socket.bind("*", 5223)
+assert(server, "Failed to bind to socket")
+copas.addserver(server, handler)
+
+copas.loop();