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Change sed usage back into one sed script for incompetent versions of sed
148 | 1 | |
2 | local hosts = hosts; | |
3 | local sessions = sessions; | |
4 | local socket = require "socket"; | |
5 | local format = string.format; | |
337 | 6 | local t_insert, t_sort = table.insert, table.sort; |
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7 | local get_traceback = debug.traceback; |
148 | 8 | local tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber |
9 | = tostring, pairs, ipairs, getmetatable, print, newproxy, error, tonumber; | |
10 | ||
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11 | local idna_to_ascii = require "util.encodings".idna.to_ascii; |
148 | 12 | local connlisteners_get = require "net.connlisteners".get; |
13 | local wraptlsclient = require "net.server".wraptlsclient; | |
14 | local modulemanager = require "core.modulemanager"; | |
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15 | local st = require "stanza"; |
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16 | local stanza = st.stanza; |
148 | 17 | |
18 | local uuid_gen = require "util.uuid".generate; | |
19 | ||
20 | local logger_init = require "util.logger".init; | |
21 | ||
22 | local log = logger_init("s2smanager"); | |
23 | ||
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24 | local sha256_hash = require "util.hashes".sha256; |
148 | 25 | |
26 | local dialback_secret = "This is very secret!!! Ha!"; | |
27 | ||
337 | 28 | local dns = require "net.dns"; |
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29 | |
148 | 30 | module "s2smanager" |
31 | ||
337 | 32 | local function compare_srv_priorities(a,b) return a.priority < b.priority or a.weight < b.weight; end |
33 | ||
148 | 34 | function send_to_host(from_host, to_host, data) |
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35 | if data.name then data = tostring(data); end |
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36 | local host = hosts[from_host].s2sout[to_host]; |
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37 | if host then |
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38 | -- We have a connection to this host already |
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39 | if host.type == "s2sout_unauthed" and ((not data.xmlns) or data.xmlns == "jabber:client" or data.xmlns == "jabber:server") then |
337 | 40 | (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host..", authing it now..."); |
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41 | if not host.notopen and not host.dialback_key then |
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42 | host.log("debug", "dialback had not been initiated"); |
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43 | initiate_dialback(host); |
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44 | end |
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45 | |
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46 | -- Queue stanza until we are able to send it |
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47 | if host.sendq then t_insert(host.sendq, data); |
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48 | else host.sendq = { data }; end |
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49 | elseif host.type == "local" or host.type == "component" then |
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50 | log("error", "Trying to send a stanza to ourselves??") |
256 | 51 | log("error", "Traceback: %s", get_traceback()); |
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52 | log("error", "Stanza: %s", tostring(data)); |
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53 | else |
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54 | (host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); |
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55 | -- FIXME |
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56 | if host.from_host ~= from_host then |
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57 | log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
331 | 58 | log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); |
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59 | end |
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60 | host.sends2s(data); |
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61 | host.log("debug", "stanza sent over "..host.type); |
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62 | end |
148 | 63 | else |
64 | log("debug", "opening a new outgoing connection for this stanza"); | |
65 | local host_session = new_outgoing(from_host, to_host); | |
66 | -- Store in buffer | |
67 | host_session.sendq = { data }; | |
68 | end | |
69 | end | |
70 | ||
71 | local open_sessions = 0; | |
72 | ||
73 | function new_incoming(conn) | |
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74 | local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming" }; |
148 | 75 | if true then |
76 | session.trace = newproxy(true); | |
77 | getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; print("s2s session got collected, now "..open_sessions.." s2s sessions are allocated") end; | |
78 | end | |
79 | open_sessions = open_sessions + 1; | |
343 | 80 | local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$")); |
81 | session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end | |
148 | 82 | return session; |
83 | end | |
84 | ||
85 | function new_outgoing(from_host, to_host) | |
86 | local host_session = { to_host = to_host, from_host = from_host, notopen = true, type = "s2sout_unauthed", direction = "outgoing" }; | |
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87 | hosts[from_host].s2sout[to_host] = host_session; |
148 | 88 | |
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89 | local log; |
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90 | do |
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91 | local conn_name = "s2sout"..tostring(conn):match("[a-f0-9]*$"); |
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92 | log = logger_init(conn_name); |
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93 | host_session.log = log; |
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94 | end |
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95 | |
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96 | attempt_connection(host_session); |
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97 | |
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98 | return host_session; |
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99 | end |
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100 | |
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101 | |
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102 | function attempt_connection(host_session, err) |
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103 | local from_host, to_host = host_session.from_host, host_session.to_host; |
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104 | local conn, handler = socket.tcp() |
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105 | |
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106 | local connect_host, connect_port = idna_to_ascii(to_host), 5269; |
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107 | |
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108 | if not err then -- This is our first attempt |
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109 | local answer = dns.lookup("_xmpp-server._tcp."..connect_host..".", "SRV"); |
337 | 110 | |
111 | if answer then | |
112 | log("debug", to_host.." has SRV records, handling..."); | |
113 | local srv_hosts = {}; | |
114 | host_session.srv_hosts = srv_hosts; | |
115 | for _, record in ipairs(answer) do | |
116 | t_insert(srv_hosts, record.srv); | |
117 | end | |
118 | t_sort(srv_hosts, compare_srv_priorities); | |
119 | ||
120 | local srv_choice = srv_hosts[1]; | |
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121 | host_session.srv_choice = 1; |
337 | 122 | if srv_choice then |
123 | connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; | |
124 | log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); | |
125 | end | |
126 | end | |
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127 | 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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128 | host_session.srv_choice = host_session.srv_choice + 1; |
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129 | local srv_choice = host_session.srv_hosts[host_session.srv_choice]; |
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130 | connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; |
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131 | 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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132 | else |
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133 | host_session.log("debug", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); |
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134 | -- We're out of options |
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135 | return false; |
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136 | end |
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137 | |
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138 | -- Ok, we're going to try to connect |
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139 | conn:settimeout(0); |
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140 | local success, err = conn:connect(connect_host, connect_port); |
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141 | if not success and err ~= "timeout" then |
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142 | log("warn", "s2s connect() failed: %s", err); |
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143 | end |
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144 | |
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145 | local cl = connlisteners_get("xmppserver"); |
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146 | conn = wraptlsclient(cl, conn, connect_host, connect_port, 0, cl.default_mode or 1, hosts[from_host].ssl_ctx ); |
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147 | host_session.conn = conn; |
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148 | |
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149 | -- Register this outgoing connection so that xmppserver_listener knows about it |
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150 | -- otherwise it will assume it is a new incoming connection |
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151 | cl.register_outgoing(conn, host_session); |
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152 | |
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153 | local w = conn.write; |
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154 | host_session.sends2s = function (t) log("debug", "sending: %s", tostring(t)); w(tostring(t)); end |
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155 | |
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156 | 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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157 | return true; |
148 | 158 | end |
159 | ||
160 | function streamopened(session, attr) | |
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161 | local send = session.sends2s; |
148 | 162 | |
163 | session.version = tonumber(attr.version) or 0; | |
164 | if session.version >= 1.0 and not (attr.to and attr.from) then | |
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165 | --print("to: "..tostring(attr.to).." from: "..tostring(attr.from)); |
148 | 166 | log("warn", (session.to_host or "(unknown)").." failed to specify 'to' or 'from' hostname as per RFC"); |
167 | end | |
168 | ||
169 | if session.direction == "incoming" then | |
170 | -- Send a reply stream header | |
171 | ||
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172 | --for k,v in pairs(attr) do print("", tostring(k), ":::", tostring(v)); end |
148 | 173 | |
174 | session.to_host = attr.to; | |
175 | session.from_host = attr.from; | |
176 | ||
177 | session.streamid = uuid_gen(); | |
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178 | (session.log or log)("debug", "incoming s2s received <stream:stream>"); |
148 | 179 | send("<?xml version='1.0'?>"); |
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180 | 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 | 181 | if session.to_host and not hosts[session.to_host] then |
182 | -- Attempting to connect to a host we don't serve | |
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183 | session:close({ condition = "host-unknown"; text = "This host does not serve "..session.to_host }); |
331 | 184 | return; |
185 | end | |
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186 | if session.version >= 1.0 then |
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187 | send(st.stanza("stream:features") |
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188 | :tag("dialback", { xmlns='urn:xmpp:features:dialback' }):tag("optional"):up():up()); |
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189 | end |
148 | 190 | elseif session.direction == "outgoing" then |
191 | -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
190
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192 | if not attr.id then error("stream response did not give us a streamid!!!"); end |
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193 | session.streamid = attr.id; |
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194 | |
148 | 195 | if not session.dialback_verifying then |
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196 | initiate_dialback(session); |
148 | 197 | else |
198 | mark_connected(session); | |
199 | end | |
200 | end | |
259 | 201 | |
148 | 202 | session.notopen = nil; |
203 | end | |
204 | ||
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205 | function initiate_dialback(session) |
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206 | -- generate dialback key |
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207 | session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
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208 | 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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209 | session.log("info", "sent dialback key on outgoing s2s stream"); |
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210 | end |
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211 | |
148 | 212 | function generate_dialback(id, to, from) |
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213 | return sha256_hash(id..to..from..dialback_secret, true); |
148 | 214 | end |
215 | ||
216 | function verify_dialback(id, to, from, key) | |
217 | return key == generate_dialback(id, to, from); | |
218 | end | |
219 | ||
220 | function make_authenticated(session) | |
221 | if session.type == "s2sout_unauthed" then | |
222 | session.type = "s2sout"; | |
223 | elseif session.type == "s2sin_unauthed" then | |
224 | session.type = "s2sin"; | |
225 | else | |
226 | return false; | |
227 | end | |
228 | session.log("info", "connection is now authenticated"); | |
229 | ||
230 | mark_connected(session); | |
231 | ||
232 | return true; | |
233 | end | |
234 | ||
235 | function mark_connected(session) | |
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236 | local sendq, send = session.sendq, session.sends2s; |
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237 | |
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238 | local from, to = session.from_host, session.to_host; |
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239 | |
190
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240 | session.log("debug", session.direction.." s2s connection "..from.."->"..to.." is now complete"); |
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241 | |
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242 | local send_to_host = send_to_host; |
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243 | function session.send(data) send_to_host(to, from, data); end |
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244 | |
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245 | |
190
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246 | if session.direction == "outgoing" then |
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247 | if sendq then |
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248 | session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); |
190
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249 | for i, data in ipairs(sendq) do |
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250 | send(data); |
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251 | sendq[i] = nil; |
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252 | end |
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253 | session.sendq = nil; |
148 | 254 | end |
255 | end | |
256 | end | |
257 | ||
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258 | function destroy_session(session) |
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259 | (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
331 | 260 | |
261 | -- FIXME: Flush sendq here/report errors to originators | |
262 | ||
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263 | if session.direction == "outgoing" then |
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264 | hosts[session.from_host].s2sout[session.to_host] = nil; |
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265 | end |
331 | 266 | |
164
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267 | for k in pairs(session) do |
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268 | if k ~= "trace" then |
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269 | session[k] = nil; |
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270 | end |
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271 | end |
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272 | end |
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273 | |
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274 | return _M; |