Software / code / prosody
Annotate
core/s2smanager.lua @ 3950:27947d66b814
s2smanager: retire_session(): Add a 'reason' parameter
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Fri, 24 Dec 2010 04:47:18 +0000 |
| parent | 3948:d0b8fa486458 |
| child | 3951:b8d930c21a3a |
| rev | line source |
|---|---|
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Remove version number from copyright headers
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1 -- Prosody IM |
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Update copyright headers for 2010
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2 -- Copyright (C) 2008-2010 Matthew Wild |
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3 -- Copyright (C) 2008-2010 Waqas Hussain |
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4 -- |
| 758 | 5 -- This project is MIT/X11 licensed. Please see the |
| 6 -- COPYING file in the source package for more information. | |
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7 -- |
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8 |
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9 |
| 148 | 10 |
| 11 local hosts = hosts; | |
| 12 local sessions = sessions; | |
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13 local core_process_stanza = function(a, b) core_process_stanza(a, b); end |
|
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s2smanager: Timeout DNS requests after 60 seconds (or dns_timeout in config)
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14 local add_task = require "util.timer".add_task; |
| 148 | 15 local socket = require "socket"; |
| 16 local format = string.format; | |
| 337 | 17 local t_insert, t_sort = table.insert, table.sort; |
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18 local get_traceback = debug.traceback; |
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19 local tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber, setmetatable |
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20 = tostring, pairs, ipairs, getmetatable, newproxy, error, tonumber, setmetatable; |
| 148 | 21 |
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(Basic) IDNA and SRV fallback support
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22 local idna_to_ascii = require "util.encodings".idna.to_ascii; |
| 148 | 23 local connlisteners_get = require "net.connlisteners".get; |
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s2smanager: Add filters for outgoing bytes and stanzas
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24 local initialize_filters = require "util.filters".initialize; |
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25 local wrapclient = require "net.server".wrapclient; |
| 148 | 26 local modulemanager = require "core.modulemanager"; |
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244
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27 local st = require "stanza"; |
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28 local stanza = st.stanza; |
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Fixed: s2smanager: Apply nameprep on hostnames passed in stream tag (part of issue #57)
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29 local nameprep = require "util.encodings".stringprep.nameprep; |
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core.s2smanager, mod_console, mod_saslauth, util.certverification: rename util.certverification to util.x509
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30 local cert_verify_identity = require "util.x509".verify_identity; |
| 148 | 31 |
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s2smanager: Remove dependency on eventmanager
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32 local fire_event = prosody.events.fire_event; |
| 148 | 33 local uuid_gen = require "util.uuid".generate; |
| 34 | |
| 35 local logger_init = require "util.logger".init; | |
| 36 | |
| 37 local log = logger_init("s2smanager"); | |
| 38 | |
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Switched from md5 to sha256 for dialback key generation
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39 local sha256_hash = require "util.hashes".sha256; |
| 148 | 40 |
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s2smanager: Compatibility with domains which use CNAMEs
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41 local adns, dns = require "net.adns", require "net.dns"; |
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s2smanager: Fix access of 'config' global without requiring configmanager
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42 local config = require "core.configmanager"; |
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s2smanager: Timeout unauthed s2s connections
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43 local connect_timeout = config.get("*", "core", "s2s_timeout") or 60; |
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s2smanager: Lower default DNS timeout to 15s (it's now a per-DNS-server timeout, rather than total timeout), use net.dns's new timeout system, and remove our custom timeout handlers
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44 local dns_timeout = config.get("*", "core", "dns_timeout") or 15; |
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core.s2smanager: Don't recurse CNAMEs infinitely :)
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45 local max_dns_depth = config.get("*", "core", "dns_max_depth") or 3; |
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46 |
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47 dns.settimeout(dns_timeout); |
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48 |
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s2smanager: Fire s2s{in,out}-established when new s2s connections are ready
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49 local prosody = _G.prosody; |
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Add support for dialback piggy-backing. Fixes #37. Thanks to CShadowRun for helping me test :)
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50 incoming_s2s = {}; |
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51 prosody.incoming_s2s = incoming_s2s; |
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52 local incoming_s2s = incoming_s2s; |
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53 |
| 148 | 54 module "s2smanager" |
| 55 | |
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56 function compare_srv_priorities(a,b) |
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57 return a.priority < b.priority or (a.priority == b.priority and a.weight > b.weight); |
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58 end |
| 337 | 59 |
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s2smanager: Only bounce real stanzas on s2s failure, not dialback and friends (thanks elghinn)
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60 local bouncy_stanzas = { message = true, presence = true, iq = true }; |
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s2smanager: Have both destroy_session and bounce_sendq accept a reason string to include in bounced stanzas
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61 local function bounce_sendq(session, reason) |
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62 local sendq = session.sendq; |
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63 if sendq then |
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s2smanager: Miscellaneous logging improvements, changing levels, improving messages and using session loggers where possible
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64 session.log("info", "sending error replies for "..#sendq.." queued stanzas because of failed outgoing connection to "..tostring(session.to_host)); |
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65 local dummy = { |
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66 type = "s2sin"; |
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67 send = function(s) |
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68 (session.log or log)("error", "Replying to to an s2s error reply, please report this! Traceback: %s", get_traceback()); |
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69 end; |
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70 dummy = true; |
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71 }; |
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72 for i, data in ipairs(sendq) do |
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73 local reply = data[2]; |
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74 local xmlns = reply.attr.xmlns; |
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s2smanager: brackets, just to be sure :)
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75 if not(xmlns) and bouncy_stanzas[reply.name] then |
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76 reply.attr.type = "error"; |
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77 reply:tag("error", {type = "cancel"}) |
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78 :tag("remote-server-not-found", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):up(); |
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79 if reason then |
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80 reply:tag("text", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}):text("Connection failed: "..reason):up(); |
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81 end |
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82 core_process_stanza(dummy, reply); |
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83 end |
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84 sendq[i] = nil; |
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85 end |
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86 session.sendq = nil; |
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87 end |
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88 end |
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89 |
| 148 | 90 function send_to_host(from_host, to_host, data) |
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91 if not hosts[from_host] then |
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92 log("warn", "Attempt to send stanza from %s - a host we don't serve", from_host); |
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93 return false; |
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94 end |
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95 local host = hosts[from_host].s2sout[to_host]; |
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96 if host then |
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97 -- We have a connection to this host already |
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stanza_router, s2smanager, modulemanager: Fix for handling of the default namespace on stanzas, causing sometimes jabber:client to be sent over s2s, and accepted
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98 if host.type == "s2sout_unauthed" and (data.name ~= "db:verify" or not host.dialback_key) then |
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99 (host.log or log)("debug", "trying to send over unauthed s2sout to "..to_host); |
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100 |
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101 -- Queue stanza until we are able to send it |
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102 if host.sendq then t_insert(host.sendq, {tostring(data), st.reply(data)}); |
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103 else host.sendq = { {tostring(data), st.reply(data)} }; end |
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Remove an incorrect line which I didn't add, and fix the proper way. Corrects the sending of stanzas over unauthed s2sout's. Also fixes mod_dialback to send stanzas and not strings.
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104 host.log("debug", "stanza [%s] queued ", data.name); |
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105 elseif host.type == "local" or host.type == "component" then |
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106 log("error", "Trying to send a stanza to ourselves??") |
| 256 | 107 log("error", "Traceback: %s", get_traceback()); |
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258
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Yep, s2s definitely works now. This is just a small fix for logging...
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108 log("error", "Stanza: %s", tostring(data)); |
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109 return false; |
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110 else |
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111 (host.log or log)("debug", "going to send stanza to "..to_host.." from "..from_host); |
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Just committing this warning, because I want to know if the problem really affects us
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112 -- FIXME |
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113 if host.from_host ~= from_host then |
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114 log("error", "WARNING! This might, possibly, be a bug, but it might not..."); |
| 331 | 115 log("error", "We are going to send from %s instead of %s", tostring(host.from_host), tostring(from_host)); |
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116 end |
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117 host.sends2s(data); |
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118 host.log("debug", "stanza sent over "..host.type); |
|
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119 end |
| 148 | 120 else |
| 121 log("debug", "opening a new outgoing connection for this stanza"); | |
| 122 local host_session = new_outgoing(from_host, to_host); | |
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123 |
| 148 | 124 -- Store in buffer |
|
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125 host_session.sendq = { {tostring(data), st.reply(data)} }; |
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126 log("debug", "stanza [%s] queued until connection complete", tostring(data.name)); |
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127 if (not host_session.connecting) and (not host_session.conn) then |
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128 log("warn", "Connection to %s failed already, destroying session...", to_host); |
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129 destroy_session(host_session); |
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130 return false; |
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131 end |
| 148 | 132 end |
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133 return true; |
| 148 | 134 end |
| 135 | |
| 136 local open_sessions = 0; | |
| 137 | |
| 138 function new_incoming(conn) | |
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139 local session = { conn = conn, type = "s2sin_unauthed", direction = "incoming", hosts = {} }; |
| 148 | 140 if true then |
| 141 session.trace = newproxy(true); | |
|
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142 getmetatable(session.trace).__gc = function () open_sessions = open_sessions - 1; end; |
| 148 | 143 end |
| 144 open_sessions = open_sessions + 1; | |
| 343 | 145 local w, log = conn.write, logger_init("s2sin"..tostring(conn):match("[a-f0-9]+$")); |
|
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146 session.log = log; |
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147 local filter = initialize_filters(session); |
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148 session.sends2s = function (t) |
|
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149 log("debug", "sending: %s", t.top_tag and t:top_tag() or t:match("^([^>]*>?)")); |
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150 if t.name then |
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151 t = filter("stanzas/out", t); |
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152 end |
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153 if t then |
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154 t = filter("bytes/out", tostring(t)); |
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155 if t then |
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156 return w(conn, t); |
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157 end |
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158 end |
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159 end |
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160 incoming_s2s[session] = true; |
|
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161 add_task(connect_timeout, function () |
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162 if session.conn ~= conn or |
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163 session.type == "s2sin" then |
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164 return; -- Ok, we're connect[ed|ing] |
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165 end |
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166 -- Not connected, need to close session and clean up |
|
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167 (session.log or log)("warn", "Destroying incomplete session %s->%s due to inactivity", |
|
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168 session.from_host or "(unknown)", session.to_host or "(unknown)"); |
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169 session:close("connection-timeout"); |
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170 end); |
| 148 | 171 return session; |
| 172 end | |
| 173 | |
|
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174 function new_outgoing(from_host, to_host, connect) |
|
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175 local host_session = { to_host = to_host, from_host = from_host, host = from_host, |
|
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176 notopen = true, type = "s2sout_unauthed", direction = "outgoing", |
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177 open_stream = session_open_stream }; |
|
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178 |
|
260
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179 hosts[from_host].s2sout[to_host] = host_session; |
| 148 | 180 |
|
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181 local log; |
|
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182 do |
|
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183 local conn_name = "s2sout"..tostring(host_session):match("[a-f0-9]*$"); |
|
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184 log = logger_init(conn_name); |
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185 host_session.log = log; |
|
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|
186 end |
|
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187 |
|
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188 initialize_filters(host_session); |
|
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189 |
|
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190 if connect ~= false then |
|
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191 -- Kick the connection attempting machine into life |
|
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192 attempt_connection(host_session); |
|
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193 end |
|
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194 |
|
2419
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195 if not host_session.sends2s then |
|
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196 -- A sends2s which buffers data (until the stream is opened) |
|
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197 -- note that data in this buffer will be sent before the stream is authed |
|
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198 -- and will not be ack'd in any way, successful or otherwise |
|
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199 local buffer; |
|
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200 function host_session.sends2s(data) |
|
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|
201 if not buffer then |
|
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|
202 buffer = {}; |
|
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203 host_session.send_buffer = buffer; |
|
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|
204 end |
|
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|
205 log("debug", "Buffering data on unconnected s2sout to %s", to_host); |
|
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|
206 buffer[#buffer+1] = data; |
|
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|
207 log("debug", "Buffered item %d: %s", #buffer, tostring(data)); |
|
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|
208 end |
|
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|
209 end |
|
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|
210 |
|
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|
211 return host_session; |
|
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diff
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|
212 end |
|
353
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Remove an old FIXME comment
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diff
changeset
|
213 |
|
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|
214 |
|
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|
215 function attempt_connection(host_session, err) |
|
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216 local from_host, to_host = host_session.from_host, host_session.to_host; |
|
3309
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diff
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217 local connect_host, connect_port = to_host and idna_to_ascii(to_host), 5269; |
|
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218 |
|
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219 if not connect_host then |
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220 return false; |
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221 end |
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222 |
|
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223 if not err then -- This is our first attempt |
|
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|
224 log("debug", "First attempt to connect to %s, starting with SRV lookup...", to_host); |
| 974 | 225 host_session.connecting = true; |
|
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226 local handle; |
|
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227 handle = adns.lookup(function (answer) |
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228 handle = nil; |
| 974 | 229 host_session.connecting = nil; |
| 230 if answer then | |
| 231 log("debug", to_host.." has SRV records, handling..."); | |
| 232 local srv_hosts = {}; | |
| 233 host_session.srv_hosts = srv_hosts; | |
| 234 for _, record in ipairs(answer) do | |
| 235 t_insert(srv_hosts, record.srv); | |
| 236 end | |
| 237 t_sort(srv_hosts, compare_srv_priorities); | |
| 238 | |
| 239 local srv_choice = srv_hosts[1]; | |
| 240 host_session.srv_choice = 1; | |
| 241 if srv_choice then | |
| 242 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; | |
| 243 log("debug", "Best record found, will connect to %s:%d", connect_host, connect_port); | |
| 244 end | |
| 245 else | |
| 246 log("debug", to_host.." has no SRV records, falling back to A"); | |
| 337 | 247 end |
| 974 | 248 -- Try with SRV, or just the plain hostname if no SRV |
|
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249 local ok, err = try_connect(host_session, connect_host, connect_port); |
|
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250 if not ok then |
|
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251 if not attempt_connection(host_session, err) then |
|
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252 -- No more attempts will be made |
|
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253 destroy_session(host_session, err); |
|
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254 end |
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255 end |
| 974 | 256 end, "_xmpp-server._tcp."..connect_host..".", "SRV"); |
|
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257 |
| 974 | 258 return true; -- Attempt in progress |
|
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259 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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260 host_session.srv_choice = host_session.srv_choice + 1; |
|
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261 local srv_choice = host_session.srv_hosts[host_session.srv_choice]; |
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262 connect_host, connect_port = srv_choice.target or to_host, srv_choice.port or connect_port; |
|
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|
263 host_session.log("info", "Connection failed (%s). Attempt #%d: This time to %s:%d", tostring(err), host_session.srv_choice, connect_host, connect_port); |
|
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264 else |
|
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265 host_session.log("info", "Out of connection options, can't connect to %s", tostring(host_session.to_host)); |
|
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266 -- We're out of options |
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267 return false; |
|
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268 end |
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269 |
|
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270 if not (connect_host and connect_port) then |
|
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271 -- Likely we couldn't resolve DNS |
|
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272 log("warn", "Hmm, we're without a host (%s) and port (%s) to connect to for %s, giving up :(", tostring(connect_host), tostring(connect_port), tostring(to_host)); |
|
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273 return false; |
|
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|
274 end |
|
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275 |
| 974 | 276 return try_connect(host_session, connect_host, connect_port); |
| 277 end | |
| 278 | |
| 279 function try_connect(host_session, connect_host, connect_port) | |
|
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280 host_session.connecting = true; |
|
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281 local handle; |
|
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282 handle = adns.lookup(function (reply) |
|
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283 handle = nil; |
|
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284 host_session.connecting = nil; |
|
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285 |
|
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286 -- COMPAT: This is a compromise for all you CNAME-(ab)users :) |
|
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287 if not (reply and reply[#reply] and reply[#reply].a) then |
|
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288 local count = max_dns_depth; |
|
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289 reply = dns.peek(connect_host, "CNAME", "IN"); |
|
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290 while count > 0 and reply and reply[#reply] and not reply[#reply].a and reply[#reply].cname do |
|
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291 log("debug", "Looking up %s (DNS depth is %d)", tostring(reply[#reply].cname), count); |
|
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292 reply = dns.peek(reply[#reply].cname, "A", "IN") or dns.peek(reply[#reply].cname, "CNAME", "IN"); |
|
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293 count = count - 1; |
|
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294 end |
|
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295 end |
|
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|
296 -- end of CNAME resolving |
|
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|
297 |
|
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298 if reply and reply[#reply] and reply[#reply].a then |
|
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|
299 log("debug", "DNS reply for %s gives us %s", connect_host, reply[#reply].a); |
|
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300 return make_connect(host_session, reply[#reply].a, connect_port); |
|
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diff
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|
301 else |
|
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|
302 log("debug", "DNS lookup failed to get a response for %s", connect_host); |
|
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|
303 if not attempt_connection(host_session, "name resolution failed") then -- Retry if we can |
|
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|
304 log("debug", "No other records to try for %s - destroying", host_session.to_host); |
|
2783
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s2smanager: Give reasons to destroy_session in more cases, including when DNS lookup fails
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2781
diff
changeset
|
305 destroy_session(host_session, "DNS resolution failed"); -- End of the line, we can't |
|
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|
306 end |
|
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|
307 end |
|
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|
308 end, connect_host, "A", "IN"); |
|
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|
309 |
|
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|
310 return true; |
|
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|
311 end |
|
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|
312 |
|
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diff
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|
313 function make_connect(host_session, connect_host, connect_port) |
|
2813
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s2smanager: Use s2smanager log() if session doesn't have a logger (thanks Flo)
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2801
diff
changeset
|
314 (host_session.log or log)("info", "Beginning new connection attempt to %s (%s:%d)", host_session.to_host, connect_host, connect_port); |
|
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diff
changeset
|
315 -- Ok, we're going to try to connect |
| 974 | 316 |
| 317 local from_host, to_host = host_session.from_host, host_session.to_host; | |
| 318 | |
| 319 local conn, handler = socket.tcp() | |
|
2712
9c579864b20a
s2smanager: Log and fail gracefully when unable to create socket for outgoing s2s connection (thanks foucault)
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diff
changeset
|
320 |
|
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diff
changeset
|
321 if not conn then |
|
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diff
changeset
|
322 log("warn", "Failed to create outgoing connection, system error: %s", handler); |
|
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diff
changeset
|
323 return false, handler; |
|
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2711
diff
changeset
|
324 end |
| 974 | 325 |
|
434
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diff
changeset
|
326 conn:settimeout(0); |
|
0d7ba3742f7a
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diff
changeset
|
327 local success, err = conn:connect(connect_host, connect_port); |
|
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diff
changeset
|
328 if not success and err ~= "timeout" then |
|
1468
83b297a412a2
s2smanager: Log the hostname and address when s2s connection fails instantly
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parents:
1450
diff
changeset
|
329 log("warn", "s2s connect() to %s (%s:%d) failed: %s", host_session.to_host, connect_host, connect_port, err); |
|
1492
aaeccebad0f3
s2smanager: Fix to correctly bounce stanzas if first connection attempt fails instantly
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parents:
1468
diff
changeset
|
330 return false, err; |
|
434
0d7ba3742f7a
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360
diff
changeset
|
331 end |
|
0d7ba3742f7a
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parents:
360
diff
changeset
|
332 |
|
0d7ba3742f7a
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360
diff
changeset
|
333 local cl = connlisteners_get("xmppserver"); |
|
2545
99700e601d16
s2smanager: Update for new server SSL API (don't pass a sslctx)
Matthew Wild <mwild1@gmail.com>
parents:
2539
diff
changeset
|
334 conn = wrapclient(conn, connect_host, connect_port, cl, cl.default_mode or 1 ); |
|
434
0d7ba3742f7a
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diff
changeset
|
335 host_session.conn = conn; |
|
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diff
changeset
|
336 |
|
3146
aaaea4cdbf10
s2smanager: Add filters for outgoing bytes and stanzas
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parents:
2951
diff
changeset
|
337 local filter = initialize_filters(host_session); |
|
2019
c712ea57b877
s2smanager: Use session-specific logger to log outgoing data on outgoing s2s connections
Matthew Wild <mwild1@gmail.com>
parents:
1976
diff
changeset
|
338 local w, log = conn.write, host_session.log; |
|
3146
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diff
changeset
|
339 host_session.sends2s = function (t) |
|
3265
9374f84c6677
s2smanager: Fix logging for outgoing sessions to also log pre-filtered data
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parents:
3224
diff
changeset
|
340 log("debug", "sending: %s", (t.top_tag and t:top_tag()) or t:match("^[^>]*>?")); |
|
3146
aaaea4cdbf10
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diff
changeset
|
341 if t.name then |
|
aaaea4cdbf10
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diff
changeset
|
342 t = filter("stanzas/out", t); |
|
aaaea4cdbf10
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2951
diff
changeset
|
343 end |
|
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diff
changeset
|
344 if t then |
|
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diff
changeset
|
345 t = filter("bytes/out", tostring(t)); |
|
aaaea4cdbf10
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diff
changeset
|
346 if t then |
|
aaaea4cdbf10
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diff
changeset
|
347 return w(conn, tostring(t)); |
|
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2951
diff
changeset
|
348 end |
|
aaaea4cdbf10
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2951
diff
changeset
|
349 end |
|
aaaea4cdbf10
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2951
diff
changeset
|
350 end |
|
434
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360
diff
changeset
|
351 |
|
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diff
changeset
|
352 -- Register this outgoing connection so that xmppserver_listener knows about it |
|
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diff
changeset
|
353 -- otherwise it will assume it is a new incoming connection |
|
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diff
changeset
|
354 cl.register_outgoing(conn, host_session); |
|
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360
diff
changeset
|
355 |
|
2469
9e0c0b08f219
s2smanager: No-one noticed that Prosody stopped sending to/from on stream headers recently? :)
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parents:
2426
diff
changeset
|
356 host_session:open_stream(from_host, to_host); |
|
2426
4cef9808662a
s2smanager: Split sending of stream header into a :open_stream() method
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parents:
2422
diff
changeset
|
357 |
| 974 | 358 log("debug", "Connection attempt in progress..."); |
|
1796
5f7b2f940816
s2smanager: Timeout unauthed s2s connections
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parents:
1793
diff
changeset
|
359 add_task(connect_timeout, function () |
|
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1793
diff
changeset
|
360 if host_session.conn ~= conn or |
|
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diff
changeset
|
361 host_session.type == "s2sout" or |
|
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diff
changeset
|
362 host_session.connecting then |
|
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1793
diff
changeset
|
363 return; -- Ok, we're connect[ed|ing] |
|
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1793
diff
changeset
|
364 end |
|
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1793
diff
changeset
|
365 -- Not connected, need to close session and clean up |
|
2419
00d985639a06
s2smanager: Trim trailing whitespace
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parents:
2382
diff
changeset
|
366 (host_session.log or log)("warn", "Destroying incomplete session %s->%s due to inactivity", |
|
1796
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1793
diff
changeset
|
367 host_session.from_host or "(unknown)", host_session.to_host or "(unknown)"); |
|
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diff
changeset
|
368 host_session:close("connection-timeout"); |
|
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diff
changeset
|
369 end); |
|
434
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diff
changeset
|
370 return true; |
| 148 | 371 end |
| 372 | |
|
2426
4cef9808662a
s2smanager: Split sending of stream header into a :open_stream() method
Matthew Wild <mwild1@gmail.com>
parents:
2422
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|
373 function session_open_stream(session, from, to) |
|
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374 session.sends2s(st.stanza("stream:stream", { |
|
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375 xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', |
|
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|
376 ["xmlns:stream"]='http://etherx.jabber.org/streams', |
|
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377 from=from, to=to, version='1.0', ["xml:lang"]='en'}):top_tag()); |
|
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|
378 end |
|
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|
379 |
| 3651 | 380 local function check_cert_status(session) |
| 381 local conn = session.conn:socket() | |
|
3663
300ae72fd692
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|
382 local cert |
|
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|
383 if conn.getpeercertificate then |
|
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|
384 cert = conn:getpeercertificate() |
|
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diff
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|
385 end |
| 3651 | 386 |
| 387 if cert then | |
| 388 local chain_valid, err = conn:getpeerchainvalid() | |
| 389 if not chain_valid then | |
| 390 session.cert_chain_status = "invalid"; | |
| 391 (session.log or log)("debug", "certificate chain validation result: %s", err); | |
| 392 else | |
| 393 session.cert_chain_status = "valid"; | |
| 394 | |
| 395 local host = session.direction == "incoming" and session.from_host or session.to_host | |
| 396 | |
| 397 -- We'll go ahead and verify the asserted identity if the | |
| 398 -- connecting server specified one. | |
| 399 if host then | |
| 400 if cert_verify_identity(host, "xmpp-server", cert) then | |
| 401 session.cert_identity_status = "valid" | |
| 402 else | |
| 403 session.cert_identity_status = "invalid" | |
| 404 end | |
| 405 end | |
| 406 end | |
| 407 end | |
| 408 end | |
| 409 | |
| 148 | 410 function streamopened(session, attr) |
|
186
bfa8a30ea488
sends2s -> s2s_session.send(), s2s_session.send() -> s2s_session.sends2s()
Matthew Wild <mwild1@gmail.com>
parents:
179
diff
changeset
|
411 local send = session.sends2s; |
| 148 | 412 |
|
544
efde848869c5
Don't send stream:features to incoming s2s connections
Matthew Wild <mwild1@gmail.com>
parents:
543
diff
changeset
|
413 -- TODO: #29: SASL/TLS on s2s streams |
|
1894
53f34ba6f6d6
Minor changes; outgoing TLS works.
Paul Aurich <paul@darkrain42.org>
parents:
1891
diff
changeset
|
414 session.version = tonumber(attr.version) or 0; |
|
544
efde848869c5
Don't send stream:features to incoming s2s connections
Matthew Wild <mwild1@gmail.com>
parents:
543
diff
changeset
|
415 |
| 3651 | 416 -- TODO: Rename session.secure to session.encrypted |
|
1909
84027581c995
s2smanager: Mark session as secure if it was negotiating TLS and opens a new stream
Matthew Wild <mwild1@gmail.com>
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1895
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changeset
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417 if session.secure == false then |
|
84027581c995
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418 session.secure = true; |
|
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diff
changeset
|
419 end |
| 3651 | 420 |
| 148 | 421 if session.direction == "incoming" then |
| 422 -- Send a reply stream header | |
|
938
663f75dd7b42
Fixed: Some nil access bugs
Waqas Hussain <waqas20@gmail.com>
parents:
931
diff
changeset
|
423 session.to_host = attr.to and nameprep(attr.to); |
|
663f75dd7b42
Fixed: Some nil access bugs
Waqas Hussain <waqas20@gmail.com>
parents:
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diff
changeset
|
424 session.from_host = attr.from and nameprep(attr.from); |
| 148 | 425 |
| 426 session.streamid = uuid_gen(); | |
|
360
e918c979ad1a
Remove or comment useless prints, or change them to log()
Matthew Wild <mwild1@gmail.com>
parents:
354
diff
changeset
|
427 (session.log or log)("debug", "incoming s2s received <stream:stream>"); |
|
3383
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s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
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parents:
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diff
changeset
|
428 if session.to_host then |
|
c7acddf80583
s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
429 if not hosts[session.to_host] then |
|
c7acddf80583
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parents:
3329
diff
changeset
|
430 -- Attempting to connect to a host we don't serve |
|
c7acddf80583
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parents:
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diff
changeset
|
431 session:close({ |
|
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diff
changeset
|
432 condition = "host-unknown"; |
|
c7acddf80583
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diff
changeset
|
433 text = "This host does not serve "..session.to_host |
|
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s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
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diff
changeset
|
434 }); |
|
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parents:
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diff
changeset
|
435 return; |
|
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s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
436 elseif hosts[session.to_host].disallow_s2s then |
|
c7acddf80583
s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
Matthew Wild <mwild1@gmail.com>
parents:
3329
diff
changeset
|
437 -- Attempting to connect to a host that disallows s2s |
|
c7acddf80583
s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
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parents:
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diff
changeset
|
438 session:close({ |
|
c7acddf80583
s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
439 condition = "policy-violation"; |
|
c7acddf80583
s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
Matthew Wild <mwild1@gmail.com>
parents:
3329
diff
changeset
|
440 text = "Server-to-server communication is not allowed to this host"; |
|
c7acddf80583
s2smanager: Handle disallow_s2s for incoming streams as well as outgoing
Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
441 }); |
|
c7acddf80583
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Matthew Wild <mwild1@gmail.com>
parents:
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diff
changeset
|
442 return; |
|
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parents:
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diff
changeset
|
443 end |
| 331 | 444 end |
| 3651 | 445 |
| 446 if session.secure and not session.cert_chain_status then check_cert_status(session); end | |
| 447 | |
|
2780
f8232abcab2a
s2smanager: Send reply stream header only after checking we serve this host (sorry darkrain... :) )
Matthew Wild <mwild1@gmail.com>
parents:
2760
diff
changeset
|
448 send("<?xml version='1.0'?>"); |
|
2419
00d985639a06
s2smanager: Trim trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2382
diff
changeset
|
449 send(stanza("stream:stream", { xmlns='jabber:server', ["xmlns:db"]='jabber:server:dialback', |
|
2787
1067a454a068
s2smanager: Stamp a 'to' on the reply stream:stream. This makes prosody happy.
Paul Aurich <paul@darkrain42.org>
parents:
2783
diff
changeset
|
450 ["xmlns:stream"]='http://etherx.jabber.org/streams', id=session.streamid, from=session.to_host, to=session.from_host, version=(session.version > 0 and "1.0" or nil) }):top_tag()); |
|
345
6a7acfc1c933
Send version=1.0 in s2s stream header. Send s2s stream:features when in 1.0 mode.
Matthew Wild <mwild1@gmail.com>
parents:
344
diff
changeset
|
451 if session.version >= 1.0 then |
|
1889
e875833ae08e
s2smanager: Send stream:features for incoming s2s connections which support XMPP 1.0
Matthew Wild <mwild1@gmail.com>
parents:
1888
diff
changeset
|
452 local features = st.stanza("stream:features"); |
|
2780
f8232abcab2a
s2smanager: Send reply stream header only after checking we serve this host (sorry darkrain... :) )
Matthew Wild <mwild1@gmail.com>
parents:
2760
diff
changeset
|
453 |
|
1936
a6ca0dcc7b83
s2smanager: Make s2s-stream-features a per-host event
Matthew Wild <mwild1@gmail.com>
parents:
1930
diff
changeset
|
454 if session.to_host then |
|
2613
afa20941e098
s2smanager, mod_compression, mod_tls: Changed event.session to event.origin for s2s-stream-features event for consistency.
Waqas Hussain <waqas20@gmail.com>
parents:
2545
diff
changeset
|
455 hosts[session.to_host].events.fire_event("s2s-stream-features", { origin = session, features = features }); |
|
1936
a6ca0dcc7b83
s2smanager: Make s2s-stream-features a per-host event
Matthew Wild <mwild1@gmail.com>
parents:
1930
diff
changeset
|
456 else |
|
a6ca0dcc7b83
s2smanager: Make s2s-stream-features a per-host event
Matthew Wild <mwild1@gmail.com>
parents:
1930
diff
changeset
|
457 (session.log or log)("warn", "No 'to' on stream header from %s means we can't offer any features", session.from_host or "unknown host"); |
|
a6ca0dcc7b83
s2smanager: Make s2s-stream-features a per-host event
Matthew Wild <mwild1@gmail.com>
parents:
1930
diff
changeset
|
458 end |
|
1889
e875833ae08e
s2smanager: Send stream:features for incoming s2s connections which support XMPP 1.0
Matthew Wild <mwild1@gmail.com>
parents:
1888
diff
changeset
|
459 |
|
e875833ae08e
s2smanager: Send stream:features for incoming s2s connections which support XMPP 1.0
Matthew Wild <mwild1@gmail.com>
parents:
1888
diff
changeset
|
460 log("debug", "Sending stream features: %s", tostring(features)); |
|
e875833ae08e
s2smanager: Send stream:features for incoming s2s connections which support XMPP 1.0
Matthew Wild <mwild1@gmail.com>
parents:
1888
diff
changeset
|
461 send(features); |
|
345
6a7acfc1c933
Send version=1.0 in s2s stream header. Send s2s stream:features when in 1.0 mode.
Matthew Wild <mwild1@gmail.com>
parents:
344
diff
changeset
|
462 end |
| 148 | 463 elseif session.direction == "outgoing" then |
| 464 -- If we are just using the connection for verifying dialback keys, we won't try and auth it | |
|
190
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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parents:
186
diff
changeset
|
465 if not attr.id then error("stream response did not give us a streamid!!!"); end |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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parents:
186
diff
changeset
|
466 session.streamid = attr.id; |
| 3651 | 467 |
| 468 if session.secure and not session.cert_chain_status then check_cert_status(session); end | |
| 469 | |
|
1007
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
470 -- Send unauthed buffer |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
471 -- (stanzas which are fine to send before dialback) |
|
2419
00d985639a06
s2smanager: Trim trailing whitespace
Matthew Wild <mwild1@gmail.com>
parents:
2382
diff
changeset
|
472 -- Note that this is *not* the stanza queue (which |
|
1007
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
473 -- we can only send if auth succeeds) :) |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
474 local send_buffer = session.send_buffer; |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
475 if send_buffer and #send_buffer > 0 then |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
476 log("debug", "Sending s2s send_buffer now..."); |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
477 for i, data in ipairs(send_buffer) do |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
478 session.sends2s(tostring(data)); |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
479 send_buffer[i] = nil; |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
480 end |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
481 end |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
482 session.send_buffer = nil; |
|
c500d4cb7855
core.s2smanager: Buffer data sent before connection
Matthew Wild <mwild1@gmail.com>
parents:
1006
diff
changeset
|
483 |
|
1890
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
Matthew Wild <mwild1@gmail.com>
parents:
1889
diff
changeset
|
484 -- If server is pre-1.0, don't wait for features, just do dialback |
|
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
Matthew Wild <mwild1@gmail.com>
parents:
1889
diff
changeset
|
485 if session.version < 1.0 then |
|
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
Matthew Wild <mwild1@gmail.com>
parents:
1889
diff
changeset
|
486 if not session.dialback_verifying then |
|
1894
53f34ba6f6d6
Minor changes; outgoing TLS works.
Paul Aurich <paul@darkrain42.org>
parents:
1891
diff
changeset
|
487 log("debug", "Initiating dialback..."); |
|
1890
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
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parents:
1889
diff
changeset
|
488 initiate_dialback(session); |
|
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
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parents:
1889
diff
changeset
|
489 else |
|
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
Matthew Wild <mwild1@gmail.com>
parents:
1889
diff
changeset
|
490 mark_connected(session); |
|
aed0d8a0cca8
s2smanager: Don't wait for stream:features from non-XMPP-1.0 hosts
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1889
diff
changeset
|
491 end |
| 148 | 492 end |
| 493 end | |
| 494 session.notopen = nil; | |
| 495 end | |
| 496 | |
|
959
e3db909065f2
sessionmanager, s2smanager, mod_component: Send reply </stream:stream> when client closes stream
Matthew Wild <mwild1@gmail.com>
parents:
938
diff
changeset
|
497 function streamclosed(session) |
|
2747
168104895051
sessionmanager, s2smanager: Close session on </stream:stream>
Matthew Wild <mwild1@gmail.com>
parents:
2746
diff
changeset
|
498 (session.log or log)("debug", "Received </stream:stream>"); |
|
168104895051
sessionmanager, s2smanager: Close session on </stream:stream>
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parents:
2746
diff
changeset
|
499 session:close(); |
|
959
e3db909065f2
sessionmanager, s2smanager, mod_component: Send reply </stream:stream> when client closes stream
Matthew Wild <mwild1@gmail.com>
parents:
938
diff
changeset
|
500 end |
|
e3db909065f2
sessionmanager, s2smanager, mod_component: Send reply </stream:stream> when client closes stream
Matthew Wild <mwild1@gmail.com>
parents:
938
diff
changeset
|
501 |
|
190
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
Matthew Wild <mwild1@gmail.com>
parents:
186
diff
changeset
|
502 function initiate_dialback(session) |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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parents:
186
diff
changeset
|
503 -- generate dialback key |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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parents:
186
diff
changeset
|
504 session.dialback_key = generate_dialback(session.streamid, session.to_host, session.from_host); |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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parents:
186
diff
changeset
|
505 session.sends2s(format("<db:result from='%s' to='%s'>%s</db:result>", session.from_host, session.to_host, session.dialback_key)); |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
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parents:
186
diff
changeset
|
506 session.log("info", "sent dialback key on outgoing s2s stream"); |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
Matthew Wild <mwild1@gmail.com>
parents:
186
diff
changeset
|
507 end |
|
1e993b7deae7
General fixes for s2s, to make it more robust (I hope), sending data to remote hosts sane (s2ssession.send() works as expected), recycle outgoing dialback connections, etc.
Matthew Wild <mwild1@gmail.com>
parents:
186
diff
changeset
|
508 |
| 148 | 509 function generate_dialback(id, to, from) |
|
2420
6ccd36a95a81
s2smanager, hostmanager: Make dialback secrets per-host
Matthew Wild <mwild1@gmail.com>
parents:
2419
diff
changeset
|
510 return sha256_hash(id..to..from..hosts[from].dialback_secret, true); |
| 148 | 511 end |
| 512 | |
| 513 function verify_dialback(id, to, from, key) | |
| 514 return key == generate_dialback(id, to, from); | |
| 515 end | |
| 516 | |
|
621
cd2cab5400fc
Add support for dialback piggy-backing. Fixes #37. Thanks to CShadowRun for helping me test :)
Matthew Wild <mwild1@gmail.com>
parents:
615
diff
changeset
|
517 function make_authenticated(session, host) |
|
2799
0dc7b5ceaf8f
s2smanager: Make require_s2s_encryption do what it says on the tin
Matthew Wild <mwild1@gmail.com>
parents:
2787
diff
changeset
|
518 if not session.secure then |
|
0dc7b5ceaf8f
s2smanager: Make require_s2s_encryption do what it says on the tin
Matthew Wild <mwild1@gmail.com>
parents:
2787
diff
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|
519 local local_host = session.direction == "incoming" and session.to_host or session.from_host; |
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520 if config.get(local_host, "core", "s2s_require_encryption") then |
|
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521 session:close({ |
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522 condition = "policy-violation", |
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523 text = "Encrypted server-to-server communication is required but was not " |
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524 ..((session.direction == "outgoing" and "offered") or "used") |
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525 }); |
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526 end |
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527 end |
| 148 | 528 if session.type == "s2sout_unauthed" then |
| 529 session.type = "s2sout"; | |
| 530 elseif session.type == "s2sin_unauthed" then | |
| 531 session.type = "s2sin"; | |
|
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532 if host then |
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533 if not session.hosts[host] then session.hosts[host] = {}; end |
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534 session.hosts[host].authed = true; |
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535 end |
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536 elseif session.type == "s2sin" and host then |
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537 if not session.hosts[host] then session.hosts[host] = {}; end |
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538 session.hosts[host].authed = true; |
| 148 | 539 else |
| 540 return false; | |
| 541 end | |
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542 session.log("debug", "connection %s->%s is now authenticated", session.from_host or "(unknown)", session.to_host or "(unknown)"); |
| 148 | 543 |
| 544 mark_connected(session); | |
| 545 | |
| 546 return true; | |
| 547 end | |
| 548 | |
| 1891 | 549 -- Stream is authorised, and ready for normal stanzas |
| 148 | 550 function mark_connected(session) |
|
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551 local sendq, send = session.sendq, session.sends2s; |
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552 |
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553 local from, to = session.from_host, session.to_host; |
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554 |
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555 session.log("info", session.direction.." s2s connection "..from.."->"..to.." complete"); |
|
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556 |
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557 local send_to_host = send_to_host; |
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558 function session.send(data) return send_to_host(to, from, data); end |
|
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559 |
|
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560 local event_data = { session = session }; |
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561 if session.type == "s2sout" then |
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562 prosody.events.fire_event("s2sout-established", event_data); |
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563 hosts[session.from_host].events.fire_event("s2sout-established", event_data); |
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564 else |
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565 prosody.events.fire_event("s2sin-established", event_data); |
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566 hosts[session.to_host].events.fire_event("s2sin-established", event_data); |
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567 end |
|
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568 |
|
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569 if session.direction == "outgoing" then |
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570 if sendq then |
|
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Log how many queued stanzas we send
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571 session.log("debug", "sending "..#sendq.." queued stanzas across new outgoing connection to "..session.to_host); |
|
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diff
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572 for i, data in ipairs(sendq) do |
|
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Bounce stanza errors on failed s2s
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573 send(data[1]); |
|
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574 sendq[i] = nil; |
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575 end |
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576 session.sendq = nil; |
| 148 | 577 end |
|
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diff
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578 |
|
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579 session.srv_hosts = nil; |
| 148 | 580 end |
| 581 end | |
| 582 | |
|
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583 local resting_session = { -- Resting, not dead |
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|
584 destroyed = true; |
|
2915
f47bd0f7e2e6
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585 type = "s2s_destroyed"; |
|
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586 open_stream = function (session) |
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587 session.log("debug", "Attempt to open stream on resting session"); |
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588 end; |
|
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589 close = function (session) |
|
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590 session.log("debug", "Attempt to close already-closed session"); |
|
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591 end; |
|
3459
543f31cdde19
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diff
changeset
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592 filter = function (type, data) return data; end; |
|
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593 }; resting_session.__index = resting_session; |
|
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changeset
|
594 |
|
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changeset
|
595 function retire_session(session, reason) |
|
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596 local log = session.log or log; |
|
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|
597 for k in pairs(session) do |
|
3b9547fc0bed
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598 if k ~= "trace" and k ~= "log" and k ~= "id" then |
|
3b9547fc0bed
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diff
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|
599 session[k] = nil; |
|
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600 end |
|
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|
601 end |
|
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diff
changeset
|
602 |
|
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603 session.destruction_reason = reason; |
|
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|
604 |
|
2746
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changeset
|
605 function session.send(data) log("debug", "Discarding data sent to resting session: %s", tostring(data)); end |
|
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changeset
|
606 function session.data(data) log("debug", "Discarding data received from resting session: %s", tostring(data)); end |
|
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607 return setmetatable(session, resting_session); |
|
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608 end |
|
2857
6036c4b75235
sessionmanager, s2smanager: Give sessions dummy data handlers that log when data is received by a destroyed session
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2712
diff
changeset
|
609 |
|
2781
4b5881b6bbfc
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diff
changeset
|
610 function destroy_session(session, reason) |
|
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611 if session.destroyed then return; end |
|
169
92768120b717
Little tweak for more useful logging of closed s2s sessions
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diff
changeset
|
612 (session.log or log)("info", "Destroying "..tostring(session.direction).." session "..tostring(session.from_host).."->"..tostring(session.to_host)); |
| 331 | 613 |
|
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other half of previous commit
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|
614 if session.direction == "outgoing" then |
|
260
182f0c895676
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615 hosts[session.from_host].s2sout[session.to_host] = nil; |
|
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616 bounce_sendq(session, reason); |
|
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617 elseif session.direction == "incoming" then |
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618 incoming_s2s[session] = nil; |
|
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619 end |
| 331 | 620 |
|
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621 local event_data = { session = session, reason = reason }; |
|
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622 if session.type == "s2sout" then |
|
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|
623 prosody.events.fire_event("s2sout-destroyed", event_data); |
|
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624 if hosts[session.from_host] then |
|
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|
625 hosts[session.from_host].events.fire_event("s2sout-destroyed", event_data); |
|
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626 end |
|
3489
1b76d18e8045
s2smanager: Don't fire s2sin-destroyed for sessions that were never fully established (thanks Thomas)
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diff
changeset
|
627 elseif session.type == "s2sin" then |
|
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changeset
|
628 prosody.events.fire_event("s2sin-destroyed", event_data); |
|
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changeset
|
629 if hosts[session.to_host] then |
|
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diff
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|
630 hosts[session.to_host].events.fire_event("s2sin-destroyed", event_data); |
|
4f3fc5f9d944
s2smanager: Fire s2s{in,out}-destroyed when s2s connections are destroyed
Matthew Wild <mwild1@gmail.com>
parents:
3476
diff
changeset
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631 end |
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4f3fc5f9d944
s2smanager: Fire s2s{in,out}-destroyed when s2s connections are destroyed
Matthew Wild <mwild1@gmail.com>
parents:
3476
diff
changeset
|
632 end |
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4f3fc5f9d944
s2smanager: Fire s2s{in,out}-destroyed when s2s connections are destroyed
Matthew Wild <mwild1@gmail.com>
parents:
3476
diff
changeset
|
633 |
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2746
3b9547fc0bed
sessionmanager, s2smanager: Destroyed sessions are now simply resting (not dead) until they are collected - prevents a whole class of tracebacks
Matthew Wild <mwild1@gmail.com>
parents:
2714
diff
changeset
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634 retire_session(session); -- Clean session until it is GC'd |
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164
8dc1faa5b1df
other half of previous commit
Matthew Wild <mwild1@gmail.com>
parents:
162
diff
changeset
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635 end |
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8dc1faa5b1df
other half of previous commit
Matthew Wild <mwild1@gmail.com>
parents:
162
diff
changeset
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636 |
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225
bbbd169b326b
Just committing this warning, because I want to know if the problem really affects us
Matthew Wild <mwild1@gmail.com>
parents:
199
diff
changeset
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637 return _M; |
