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mod_c2s, sessionmanager, xmppclient_listener: Move all c2s network and stream logic into a new module, mod_c2s
This commit is contained in:
Matthew Wild
parent
29f37bbccc
commit
13b36f8ded
2 changed files with 87 additions and 91 deletions
224
plugins/mod_c2s.lua
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224
plugins/mod_c2s.lua
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-- Prosody IM
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-- Copyright (C) 2008-2010 Matthew Wild
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-- Copyright (C) 2008-2010 Waqas Hussain
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--
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-- This project is MIT/X11 licensed. Please see the
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-- COPYING file in the source package for more information.
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--
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module:set_global();
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local new_xmpp_stream = require "util.xmppstream".new;
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local nameprep = require "util.encodings".stringprep.nameprep;
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local portmanager = require "core.portmanager";
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local sessionmanager = require "core.sessionmanager";
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local st = require "util.stanza";
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local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session;
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local uuid_generate = require "util.uuid".generate;
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local xpcall, tostring, type = xpcall, tostring, type;
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local format = string.format;
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local traceback = debug.traceback;
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local xmlns_xmpp_streams = "urn:ietf:params:xml:ns:xmpp-streams";
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local log = module._log;
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local opt_keepalives = module:get_option_boolean("tcp_keepalives", false);
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local sessions = module:shared("sessions");
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local stream_callbacks = { default_ns = "jabber:client", handlestanza = core_process_stanza };
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local listener = { default_port = 5222, default_mode = "*a" };
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--- Stream events handlers
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local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'};
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local default_stream_attr = { ["xmlns:stream"] = "http://etherx.jabber.org/streams", xmlns = stream_callbacks.default_ns, version = "1.0", id = "" };
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function stream_callbacks.streamopened(session, attr)
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local send = session.send;
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session.host = attr.to;
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if not session.host then
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session:close{ condition = "improper-addressing",
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text = "A 'to' attribute is required on stream headers" };
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return;
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end
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session.host = nameprep(session.host);
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session.version = tonumber(attr.version) or 0;
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session.streamid = uuid_generate();
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(session.log or session)("debug", "Client sent opening <stream:stream> to %s", session.host);
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if not hosts[session.host] then
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-- We don't serve this host...
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session:close{ condition = "host-unknown", text = "This server does not serve "..tostring(session.host)};
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return;
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end
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send("<?xml version='1.0'?>");
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send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' version='1.0' xml:lang='en'>", session.streamid, session.host));
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(session.log or log)("debug", "Sent reply <stream:stream> to client");
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session.notopen = nil;
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-- If session.secure is *false* (not nil) then it means we /were/ encrypting
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-- since we now have a new stream header, session is secured
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if session.secure == false then
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session.secure = true;
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end
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local features = st.stanza("stream:features");
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hosts[session.host].events.fire_event("stream-features", { origin = session, features = features });
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module:fire_event("stream-features", session, features);
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send(features);
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end
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function stream_callbacks.streamclosed(session)
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session.log("debug", "Received </stream:stream>");
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session:close();
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end
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function stream_callbacks.error(session, error, data)
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if error == "no-stream" then
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session.log("debug", "Invalid opening stream header");
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session:close("invalid-namespace");
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elseif error == "parse-error" then
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(session.log or log)("debug", "Client XML parse error: %s", tostring(data));
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session:close("not-well-formed");
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elseif error == "stream-error" then
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local condition, text = "undefined-condition";
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for child in data:children() do
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if child.attr.xmlns == xmlns_xmpp_streams then
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if child.name ~= "text" then
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condition = child.name;
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else
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text = child:get_text();
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end
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if condition ~= "undefined-condition" and text then
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break;
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end
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end
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end
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text = condition .. (text and (" ("..text..")") or "");
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session.log("info", "Session closed by remote with error: %s", text);
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session:close(nil, text);
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end
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end
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local function handleerr(err) log("error", "Traceback[c2s]: %s: %s", tostring(err), traceback()); end
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function stream_callbacks.handlestanza(session, stanza)
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stanza = session.filter("stanzas/in", stanza);
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if stanza then
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return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
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end
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end
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--- Session methods
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local function session_close(session, reason)
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local log = session.log or log;
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if session.conn then
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if session.notopen then
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session.send("<?xml version='1.0'?>");
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session.send(st.stanza("stream:stream", default_stream_attr):top_tag());
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end
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if reason then
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if type(reason) == "string" then -- assume stream error
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log("info", "Disconnecting client, <stream:error> is: %s", reason);
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session.send(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' }));
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elseif type(reason) == "table" then
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if reason.condition then
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local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up();
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if reason.text then
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stanza:tag("text", stream_xmlns_attr):text(reason.text):up();
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end
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if reason.extra then
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stanza:add_child(reason.extra);
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end
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log("info", "Disconnecting client, <stream:error> is: %s", tostring(stanza));
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session.send(stanza);
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elseif reason.name then -- a stanza
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log("info", "Disconnecting client, <stream:error> is: %s", tostring(reason));
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session.send(reason);
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end
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end
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end
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session.send("</stream:stream>");
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session.conn:close();
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listener.ondisconnect(session.conn, (reason and (reason.text or reason.condition)) or reason or "session closed");
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end
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end
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--- Port listener
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function listener.onconnect(conn)
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local session = sm_new_session(conn);
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sessions[conn] = session;
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session.log("info", "Client connected");
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-- Client is using legacy SSL (otherwise mod_tls sets this flag)
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if conn:ssl() then
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session.secure = true;
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end
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if opt_keepalives then
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conn:setoption("keepalive", opt_keepalives);
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end
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session.close = session_close;
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local stream = new_xmpp_stream(session, stream_callbacks);
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session.stream = stream;
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session.notopen = true;
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function session.reset_stream()
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session.notopen = true;
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session.stream:reset();
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end
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local filter = session.filter;
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function session.data(data)
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data = filter("bytes/in", data);
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if data then
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local ok, err = stream:feed(data);
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if ok then return; end
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log("debug", "Received invalid XML (%s) %d bytes: %s", tostring(err), #data, data:sub(1, 300):gsub("[\r\n]+", " "):gsub("[%z\1-\31]", "_"));
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session:close("not-well-formed");
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end
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end
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session.dispatch_stanza = stream_callbacks.handlestanza;
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end
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function listener.onincoming(conn, data)
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local session = sessions[conn];
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if session then
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session.data(data);
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end
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end
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function listener.ondisconnect(conn, err)
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local session = sessions[conn];
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if session then
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(session.log or log)("info", "Client disconnected: %s", err);
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sm_destroy_session(session, err);
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sessions[conn] = nil;
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session = nil;
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end
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end
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function listener.associate_session(conn, session)
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sessions[conn] = session;
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end
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portmanager.register_service("c2s", {
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listener = listener;
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default_port = 5222;
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encryption = "starttls";
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});
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portmanager.register_service("legacy_ssl", {
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listener = listener;
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encryption = "ssl";
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});
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