--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.lua Fri Aug 22 21:09:04 2008 +0000
@@ -0,0 +1,275 @@
+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();