Fri, 05 Dec 2008 19:40:46 +0000
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1 | -- Prosody IM v0.1 |
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2 | -- Copyright (C) 2008 Matthew Wild |
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3 | -- Copyright (C) 2008 Waqas Hussain |
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4 | -- |
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5 | -- This program is free software; you can redistribute it and/or |
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6 | -- modify it under the terms of the GNU General Public License |
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7 | -- as published by the Free Software Foundation; either version 2 |
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8 | -- of the License, or (at your option) any later version. |
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9 | -- |
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10 | -- This program is distributed in the hope that it will be useful, |
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11 | -- but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 | -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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13 | -- GNU General Public License for more details. |
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14 | -- |
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15 | -- You should have received a copy of the GNU General Public License |
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16 | -- along with this program; if not, write to the Free Software |
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17 | -- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. |
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18 | -- |
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19 | |
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20 | |
148 | 21 | |
22 | local logger = require "logger"; | |
23 | local lxp = require "lxp" | |
24 | local init_xmlhandlers = require "core.xmlhandlers" | |
25 | local sm_new_session = require "core.sessionmanager".new_session; | |
26 | local s2s_new_incoming = require "core.s2smanager".new_incoming; | |
27 | local s2s_streamopened = require "core.s2smanager".streamopened; | |
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28 | local s2s_streamclosed = require "core.s2smanager".streamclosed; |
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29 | local s2s_destroy_session = require "core.s2smanager".destroy_session; |
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30 | local s2s_attempt_connect = require "core.s2smanager".attempt_connection; |
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31 | local stream_callbacks = { ns = "http://etherx.jabber.org/streams", streamopened = s2s_streamopened, streamclosed = s2s_streamclosed, handlestanza = core_process_stanza }; |
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32 | |
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33 | function stream_callbacks.error(session, error, data) |
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34 | if error == "no-stream" then |
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35 | session:close("invalid-namespace"); |
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36 | else |
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37 | session.log("debug", "Server-to-server XML parse error: %s", tostring(error)); |
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38 | session:close("xml-not-well-formed"); |
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39 | end |
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40 | end |
331 | 41 | |
148 | 42 | local connlisteners_register = require "net.connlisteners".register; |
43 | ||
44 | local t_insert = table.insert; | |
45 | local t_concat = table.concat; | |
46 | 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 | |
47 | local m_random = math.random; | |
48 | local format = string.format; | |
49 | local sm_new_session, sm_destroy_session = sessionmanager.new_session, sessionmanager.destroy_session; --import("core.sessionmanager", "new_session", "destroy_session"); | |
50 | local st = stanza; | |
51 | ||
52 | local sessions = {}; | |
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53 | local xmppserver = { default_port = 5269, default_mode = "*a" }; |
148 | 54 | |
55 | -- These are session methods -- | |
56 | ||
57 | local function session_reset_stream(session) | |
58 | -- Reset stream | |
331 | 59 | local parser = lxp.new(init_xmlhandlers(session, stream_callbacks), "|"); |
148 | 60 | session.parser = parser; |
61 | ||
62 | session.notopen = true; | |
63 | ||
64 | function session.data(conn, data) | |
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65 | local ok, err = parser:parse(data); |
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66 | if ok then return; end |
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67 | session:close("xml-not-well-formed"); |
148 | 68 | end |
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69 | |
148 | 70 | return true; |
71 | end | |
72 | ||
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73 | |
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74 | local stream_xmlns_attr = {xmlns='urn:ietf:params:xml:ns:xmpp-streams'}; |
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75 | local function session_close(session, reason) |
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76 | local log = session.log or log; |
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77 | if session.conn then |
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78 | if reason then |
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79 | if type(reason) == "string" then -- assume stream error |
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80 | log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, reason); |
331 | 81 | session.sends2s(st.stanza("stream:error"):tag(reason, {xmlns = 'urn:ietf:params:xml:ns:xmpp-streams' })); |
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82 | elseif type(reason) == "table" then |
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83 | if reason.condition then |
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84 | local stanza = st.stanza("stream:error"):tag(reason.condition, stream_xmlns_attr):up(); |
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85 | if reason.text then |
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86 | stanza:tag("text", stream_xmlns_attr):text(reason.text):up(); |
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87 | end |
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88 | if reason.extra then |
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89 | stanza:add_child(reason.extra); |
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90 | end |
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91 | log("info", "Disconnecting %s[%s], <stream:error> is: %s", session.host or "(unknown host)", session.type, tostring(stanza)); |
331 | 92 | session.sends2s(stanza); |
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93 | elseif reason.name then -- a stanza |
331 | 94 | log("info", "Disconnecting %s->%s[%s], <stream:error> is: %s", session.from_host or "(unknown host)", session.to_host or "(unknown host)", session.type, tostring(reason)); |
95 | session.sends2s(reason); | |
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96 | end |
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97 | end |
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98 | end |
331 | 99 | session.sends2s("</stream:stream>"); |
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100 | session.conn.close(); |
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101 | xmppserver.disconnect(session.conn, "stream error"); |
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102 | end |
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103 | end |
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104 | |
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105 | |
148 | 106 | -- End of session methods -- |
107 | ||
108 | function xmppserver.listener(conn, data) | |
109 | local session = sessions[conn]; | |
110 | if not session then | |
111 | session = s2s_new_incoming(conn); | |
112 | sessions[conn] = session; | |
113 | ||
114 | -- Logging functions -- | |
115 | ||
116 | local mainlog, log = log; | |
117 | do | |
118 | local conn_name = "s2sin"..tostring(conn):match("[a-f0-9]+$"); | |
119 | log = logger.init(conn_name); | |
120 | end | |
121 | local print = function (...) log("info", t_concatall({...}, "\t")); end | |
122 | session.log = log; | |
123 | ||
124 | print("Incoming s2s connection"); | |
125 | ||
126 | session.reset_stream = session_reset_stream; | |
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127 | session.close = session_close; |
148 | 128 | |
129 | session_reset_stream(session); -- Initialise, ready for use | |
130 | ||
131 | -- FIXME: Below function should be session,stanza - and xmlhandlers should use :method() notation to call, | |
132 | -- this will avoid the useless indirection we have atm | |
133 | -- (I'm on a mission, no time to fix now) | |
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134 | |
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135 | -- Debug version -- |
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136 | -- local function handleerr(err) print("Traceback:", err, debug.traceback()); end |
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137 | -- session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end |
148 | 138 | end |
139 | if data then | |
140 | session.data(conn, data); | |
141 | end | |
142 | end | |
143 | ||
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144 | function xmppserver.disconnect(conn, err) |
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145 | local session = sessions[conn]; |
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146 | if session then |
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147 | if err and err ~= "closed" and session.srv_hosts then |
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148 | if s2s_attempt_connect(session, err) then |
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149 | return; -- Session lives for now |
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150 | end |
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151 | end |
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152 | (session.log or log)("info", "s2s disconnected: %s->%s (%s)", tostring(session.from_host), tostring(session.to_host), tostring(err)); |
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153 | s2s_destroy_session(session); |
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154 | sessions[conn] = nil; |
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155 | session = nil; |
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156 | collectgarbage("collect"); |
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157 | end |
148 | 158 | end |
159 | ||
160 | function xmppserver.register_outgoing(conn, session) | |
161 | session.direction = "outgoing"; | |
162 | sessions[conn] = session; | |
163 | ||
164 | session.reset_stream = session_reset_stream; | |
165 | session_reset_stream(session); -- Initialise, ready for use | |
166 | ||
167 | -- FIXME: Below function should be session,stanza - and xmlhandlers should use :method() notation to call, | |
168 | -- this will avoid the useless indirection we have atm | |
169 | -- (I'm on a mission, no time to fix now) | |
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170 | local function handleerr(err) print("Traceback:", err, debug.traceback()); end |
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171 | session.stanza_dispatch = function (stanza) return select(2, xpcall(function () return core_process_stanza(session, stanza); end, handleerr)); end |
148 | 172 | end |
173 | ||
174 | connlisteners_register("xmppserver", xmppserver); | |
175 | ||
176 | ||
177 | -- We need to perform some initialisation when a connection is created | |
178 | -- We also need to perform that same initialisation at other points (SASL, TLS, ...) | |
179 | ||
180 | -- ...and we need to handle data | |
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181 | -- ...and record all sessions associated with connections |