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core/s2smanager.lua @ 543:cf6e19ea1cbc
Fix logger ids for c2s and s2sout
author | Matthew Wild <mwild1@gmail.com> |
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date | Thu, 04 Dec 2008 16:41:32 +0000 |
parent | 519:cccd610a0ef9 |
child | 544:efde848869c5 |
rev | line source |
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519
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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 hosts = hosts; | |
23 local sessions = sessions; | |
24 local socket = require "socket"; | |
25 local format = string.format; | |
337 | 26 local t_insert, t_sort = table.insert, table.sort; |
255
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27 local get_traceback = debug.traceback; |
148 | 28 local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
29 = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; | |
30 | |
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31 local idna_to_ascii = require "util.encodings".idna.to_ascii; |
148 | 32 local connlisteners_get = require "net.connlisteners".get; |
33 local wraptlsclient = require "net.server".wraptlsclient; | |
34 local modulemanager = require "core.modulemanager"; | |
244
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35 local st = require "stanza"; |
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36 local stanza = st.stanza; |
148 | 37 |
38 local uuid_gen = require "util.uuid".generate; | |
39 | |
40 local logger_init = require "util.logger".init; | |
41 | |
42 local log = logger_init("s2smanager"); | |
43 | |
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44 local sha256_hash = require "util.hashes".sha256; |
148 | 45 |
46 local dialback_secret = "This is very secret!!! Ha!"; | |
47 | |
337 | 48 local dns = require "net.dns"; |
157
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49 |
148 | 50 module "s2smanager" |
51 | |
337 | 52 local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end |
53 | |
148 | 54 function send_to_host(from_host, to_host, data) |
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55 if data.name then data = tostring(data); end |
260
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56 local host = hosts[from_host].s2sout[to_host]; |
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57 if host then |
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58 -- We have a connection to this host already |
344
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59 if host.type == "s2sout_unauthed" and ((not data.xmlns) or data.xmlns == "jabber:client" or data.xmlns == "jabber:server") then |
337 | 60 (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now..."); |
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61 if not host.notopen and not host.dialback_key then |
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62 host.log("debug", "dialback had not been initiated"); |
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63 initiate_dialback(host); |
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64 end |
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65 |
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66 -- Queue stanza until we are able to send it |
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67 if host.sendq then t_insert(host.sendq, data); |
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68 else host.sendq = { data }; end |
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69 elseif host.type == "local" or host.type == "component" then |
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70 log("error", "Trying to send a stanza to ourselves??") |
256 | 71 log("error", "Traceback: %s", get_traceback()); |
258
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72 log("error", "Stanza: %s", tostring(data)); |
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73 else |
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74 (host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); |
225
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75 -- FIXME |
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76 if host.from_host ~= from_host then |
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77 log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
331 | 78 log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); |
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79 end |
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80 host.sends2s(data); |
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81 host.log("debug", "stanza sent over "..host.type); |
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82 end |
148 | 83 else |
84 log("debug", "opening a new outgoing connection for this stanza"); | |
85 local host_session = new_outgoing(from_host, to_host); | |
86 -- Store in buffer | |
87 host_session.sendq = { data }; | |
88 end | |
89 end | |
90 | |
91 local open_sessions = 0; | |
92 | |
93 function new_incoming(conn) | |
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94 local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; |
148 | 95 if true then |
96 session.trace = newproxy(true); | |
97 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
98 end | |
99 open_sessions = open_sessions + 1; | |
343 | 100 local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$")); |
101 session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end | |
148 | 102 return session; |
103 end | |
104 | |
105 function new_outgoing(from_host, to_host) | |
106 local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
260
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107 hosts[from_host].s2sout[to_host] = host_session; |
148 | 108 |
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109 local log; |
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110 do |
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111 local conn_name = "s2sout"..tostring(host_session):match("[a-f0-9]*$"); |
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112 log = logger_init(conn_name); |
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113 host_session.log = log; |
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114 end |
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115 |
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116 attempt_connection(host_session); |
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117 |
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118 return host_session; |
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119 end |
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120 |
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121 |
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122 function attempt_connection(host_session, err) |
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123 local from_host, to_host = host_session.from_host, host_session.to_host; |
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124 local conn, handler = socket.tcp() |
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125 |
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126 local connect_host, connect_port = idna_to_ascii(to_host), 5269; |
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127 |
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128 if not err then -- This is our first attempt |
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129 local answer = dns.lookup("_xmpp-server._tcp."..connect_host..".", "SRV"); |
337 | 130 |
131 if answer then | |
132 log("debug", to_host.." has SRV records, handling..."); | |
133 local srv_hosts = {}; | |
134 host_session.srv_hosts = srv_hosts; | |
135 for _, record in ipairs(answer) do | |
136 t_insert(srv_hosts, record.srv); | |
137 end | |
138 t_sort(srv_hosts, compare_srv_priorities); | |
139 | |
140 local srv_choice = srv_hosts[1]; | |
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141 host_session.srv_choice = 1; |
337 | 142 if srv_choice then |
143 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; | |
144 log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); | |
145 end | |
146 end | |
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147 elseif host_session.srv_hosts and #host_session.srv_hosts > host_session.srv_choice then -- Not our first attempt, and we also have SRV |
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148 host_session.srv_choice = host_session.srv_choice + 1; |
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149 local srv_choice = host_session.srv_hosts[host_session.srv_choice]; |
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150 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; |
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151 host_session.log("debug", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port); |
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152 else |
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153 host_session.log("debug", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); |
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154 -- We're out of options |
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155 return false; |
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156 end |
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157 |
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158 -- Ok, we're going to try to connect |
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159 conn:settimeout(0); |
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160 local success, err = conn:connect(connect_host, connect_port); |
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161 if not success and err ~= "timeout" then |
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162 log("warn", "s2s connect() failed: %s", err); |
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163 end |
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164 |
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165 local cl = connlisteners_get("xmppserver"); |
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166 conn = wraptlsclient(cl, conn, connect_host, connect_port, 0, cl.default_mode or 1, hosts[from_host].ssl_ctx ); |
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167 host_session.conn = conn; |
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168 |
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169 -- Register this outgoing connection so that xmppserver_listener knows about it |
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170 -- otherwise it will assume it is a new incoming connection |
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171 cl.register_outgoing(conn, host_session); |
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172 |
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173 local w = conn.write; |
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174 host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end |
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175 |
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176 conn.write(format([[<stream:stream xmlns='jabber:server' xmlns:db='jabber:server:dialback' xmlns:stream='http://etherx.jabber.org/streams' from='%s' to='%s' version='1.0'>]], from_host, to_host)); |
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177 return true; |
148 | 178 end |
179 | |
180 function streamopened(session, attr) | |
186
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181 local send = session.sends2s; |
148 | 182 |
183 session.version = tonumber(attr.version) or 0; | |
184 if session.version >= 1.0 and not (attr.to and attr.from) then | |
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185 --print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); |
148 | 186 log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); |
187 end | |
188 | |
189 if session.direction == "incoming" then | |
190 -- Send a reply stream header | |
191 | |
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192 --for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end |
148 | 193 |
194 session.to_host = attr.to; | |
195 session.from_host = attr.from; | |
196 | |
197 session.streamid = uuid_gen(); | |
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198 (session.log or log)("debug", "incoming s2s received <stream:stream>"); |
148 | 199 send("<?xml version='1.0'?>"); |
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200 send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host }):top_tag()); |
331 | 201 if session.to_host and not hosts[session.to_host] then |
202 -- Attempting to connect to a host we don't serve | |
434
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203 session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host }); |
331 | 204 return; |
205 end | |
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206 if session.version >= 1.0 then |
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207 send(st.stanza("stream:features") |
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208 :tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up()); |
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209 end |
148 | 210 elseif session.direction == "outgoing" then |
211 -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
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212 if not attr.id then error("stream response did not give us a streamid!!!"); end |
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213 session.streamid = attr.id; |
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214 |
148 | 215 if not session.dialback_verifying then |
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216 initiate_dialback(session); |
148 | 217 else |
218 mark_connected(session); | |
219 end | |
220 end | |
259 | 221 |
148 | 222 session.notopen = nil; |
223 end | |
224 | |
190
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225 function initiate_dialback(session) |
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226 -- generate dialback key |
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227 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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228 session.sends2s(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key)); |
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229 session.log("info", "sent dialback key on outgoing s2s stream"); |
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230 end |
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231 |
148 | 232 function generate_dialback(id, to, from) |
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233 return sha256_hash(id..to..from..dialback_secret, true); |
148 | 234 end |
235 | |
236 function verify_dialback(id, to, from, key) | |
237 return key == generate_dialback(id, to, from); | |
238 end | |
239 | |
240 function make_authenticated(session) | |
241 if session.type == "s2sout_unauthed" then | |
242 session.type = "s2sout"; | |
243 elseif session.type == "s2sin_unauthed" then | |
244 session.type = "s2sin"; | |
245 else | |
246 return false; | |
247 end | |
248 session.log("info", "connection is now authenticated"); | |
249 | |
250 mark_connected(session); | |
251 | |
252 return true; | |
253 end | |
254 | |
255 function mark_connected(session) | |
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256 local sendq, send = session.sendq, session.sends2s; |
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257 |
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258 local from, to = session.from_host, session.to_host; |
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259 |
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260 session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
186
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261 |
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262 local send_to_host = send_to_host; |
190
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263 function session.send(data) send_to_host(to, from, data); end |
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264 |
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265 |
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266 if session.direction == "outgoing" then |
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267 if sendq then |
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268 session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); |
190
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269 for i, data in ipairs(sendq) do |
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270 send(data); |
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271 sendq[i] = nil; |
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272 end |
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273 session.sendq = nil; |
148 | 274 end |
275 end | |
276 end | |
277 | |
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278 function destroy_session(session) |
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279 (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
331 | 280 |
281 -- FIXME: Flush sendq here/report errors to originators | |
282 | |
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283 if session.direction == "outgoing" then |
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284 hosts[session.from_host].s2sout[session.to_host] = nil; |
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285 end |
331 | 286 |
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287 for k in pairs(session) do |
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288 if k ~= "trace" then |
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289 session[k] = nil; |
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290 end |
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291 end |
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292 end |
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293 |
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294 return _M; |