Mercurial > prosody-modules
annotate mod_smacks/mod_smacks.lua @ 1939:54f9e8663139
mod_auth_http_async: Correctly pass password to provider.test_password (thanks mother)
author | Kim Alvefur <zash@zash.se> |
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date | Wed, 28 Oct 2015 15:08:19 +0100 |
parents | 3683eb95bc1a |
children | e48dbb640408 |
rev | line source |
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1670 | 1 -- XEP-0198: Stream Management for Prosody IM |
2 -- | |
3 -- Copyright (C) 2010-2015 Matthew Wild | |
4 -- Copyright (C) 2010 Waqas Hussain | |
5 -- Copyright (C) 2012-2015 Kim Alvefur | |
6 -- Copyright (C) 2012 Thijs Alkemade | |
7 -- Copyright (C) 2014 Florian Zeitz | |
8 -- | |
9 -- This project is MIT/X11 licensed. Please see the | |
10 -- COPYING file in the source package for more information. | |
11 -- | |
12 | |
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13 local st = require "util.stanza"; |
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14 local uuid_generate = require "util.uuid".generate; |
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15 |
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16 local t_insert, t_remove = table.insert, table.remove; |
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17 local math_min = math.min; |
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18 local os_time = os.time; |
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19 local tonumber, tostring = tonumber, tostring; |
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20 local add_filter = require "util.filters".add_filter; |
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21 local timer = require "util.timer"; |
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22 local datetime = require "util.datetime"; |
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23 |
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24 local xmlns_sm2 = "urn:xmpp:sm:2"; |
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25 local xmlns_sm3 = "urn:xmpp:sm:3"; |
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26 local xmlns_errors = "urn:ietf:params:xml:ns:xmpp-stanzas"; |
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27 local xmlns_delay = "urn:xmpp:delay"; |
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28 |
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29 local sm2_attr = { xmlns = xmlns_sm2 }; |
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30 local sm3_attr = { xmlns = xmlns_sm3 }; |
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31 |
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32 local resume_timeout = module:get_option_number("smacks_hibernation_time", 300); |
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33 local s2s_smacks = module:get_option_boolean("smacks_enabled_s2s", false); |
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34 local s2s_resend = module:get_option_boolean("smacks_s2s_resend", false); |
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35 local max_unacked_stanzas = module:get_option_number("smacks_max_unacked_stanzas", 0); |
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36 local core_process_stanza = prosody.core_process_stanza; |
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37 local sessionmanager = require"core.sessionmanager"; |
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38 |
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39 local c2s_sessions = module:shared("/*/c2s/sessions"); |
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40 local session_registry = {}; |
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41 |
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42 local function can_do_smacks(session, advertise_only) |
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43 if session.smacks then return false, "unexpected-request", "Stream management is already enabled"; end |
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44 |
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45 local session_type = session.type; |
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46 if session_type == "c2s" then |
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47 if not(advertise_only) and not(session.resource) then -- Fail unless we're only advertising sm |
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48 return false, "unexpected-request", "Client must bind a resource before enabling stream management"; |
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49 end |
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50 return true; |
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51 elseif s2s_smacks and (session_type == "s2sin" or session_type == "s2sout") then |
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52 return true; |
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53 end |
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54 return false, "service-unavailable", "Stream management is not available for this stream"; |
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55 end |
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56 |
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57 module:hook("stream-features", |
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58 function (event) |
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59 if can_do_smacks(event.origin, true) then |
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60 event.features:tag("sm", sm2_attr):tag("optional"):up():up(); |
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61 event.features:tag("sm", sm3_attr):tag("optional"):up():up(); |
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62 end |
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63 end); |
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64 |
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65 module:hook("s2s-stream-features", |
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66 function (event) |
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67 if can_do_smacks(event.origin, true) then |
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68 event.features:tag("sm", sm2_attr):tag("optional"):up():up(); |
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69 event.features:tag("sm", sm3_attr):tag("optional"):up():up(); |
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70 end |
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71 end); |
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72 |
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73 local function outgoing_stanza_filter(stanza, session) |
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74 local is_stanza = stanza.attr and not stanza.attr.xmlns and not stanza.name:find":"; |
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75 if is_stanza and not stanza._cached then -- Stanza in default stream namespace |
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76 local queue = session.outgoing_stanza_queue; |
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77 local cached_stanza = st.clone(stanza); |
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78 cached_stanza._cached = true; |
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79 |
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80 if cached_stanza and cached_stanza.name ~= "iq" and cached_stanza:get_child("delay", xmlns_delay) == nil then |
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81 cached_stanza = cached_stanza:tag("delay", { xmlns = xmlns_delay, from = session.host, stamp = datetime.datetime()}); |
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82 end |
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83 |
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84 queue[#queue+1] = cached_stanza; |
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85 session.log("debug", "#queue = %d", #queue); |
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86 if session.hibernating then |
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87 session.log("debug", "hibernating, stanza queued"); |
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88 return ""; -- Hack to make session.send() not return nil |
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89 end |
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90 if #queue > max_unacked_stanzas and not session.awaiting_ack then |
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91 session.awaiting_ack = true; |
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92 return tostring(stanza)..tostring(st.stanza("r", { xmlns = session.smacks })); |
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93 end |
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94 end |
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95 return stanza; |
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96 end |
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97 |
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98 local function count_incoming_stanzas(stanza, session) |
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99 if not stanza.attr.xmlns then |
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100 session.handled_stanza_count = session.handled_stanza_count + 1; |
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101 session.log("debug", "Handled %d incoming stanzas", session.handled_stanza_count); |
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102 end |
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103 return stanza; |
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104 end |
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105 |
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106 local function wrap_session_out(session, resume) |
345
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107 if not resume then |
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108 session.outgoing_stanza_queue = {}; |
345
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109 session.last_acknowledged_stanza = 0; |
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110 end |
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111 |
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112 add_filter(session, "stanzas/out", outgoing_stanza_filter, -1000); |
988
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|
113 |
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|
114 local session_close = session.close; |
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115 function session.close(...) |
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|
116 if session.resumption_token then |
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|
117 session_registry[session.resumption_token] = nil; |
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118 session.resumption_token = nil; |
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119 end |
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120 return session_close(...); |
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121 end |
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122 return session; |
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123 end |
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124 |
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125 local function wrap_session_in(session, resume) |
345
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126 if not resume then |
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127 session.handled_stanza_count = 0; |
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128 end |
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129 add_filter(session, "stanzas/in", count_incoming_stanzas, 1000); |
345
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130 |
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131 return session; |
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132 end |
201
bc24f58a0d39
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diff
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133 |
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134 local function wrap_session(session, resume) |
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135 wrap_session_out(session, resume); |
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136 wrap_session_in(session, resume); |
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137 return session; |
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138 end |
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139 |
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140 function handle_enable(session, stanza, xmlns_sm) |
591
36003cae2370
mod_smacks: Consolidate logic for deciding whether to advertise or allow smacks for a given session, and fix an issue with not allowing s2s connections to enable smacks because of not binding a resource... (thanks xnyphs)
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diff
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|
141 local ok, err, err_text = can_do_smacks(session); |
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mod_smacks: Consolidate logic for deciding whether to advertise or allow smacks for a given session, and fix an issue with not allowing s2s connections to enable smacks because of not binding a resource... (thanks xnyphs)
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diff
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|
142 if not ok then |
590
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diff
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|
143 session.log("warn", "Failed to enable smacks: %s", err_text); -- TODO: XEP doesn't say we can send error text, should it? |
1527
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|
144 (session.sends2s or session.send)(st.stanza("failed", { xmlns = xmlns_sm }):tag(err, { xmlns = xmlns_errors})); |
590
40b707d7a809
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Matthew Wild <mwild1@gmail.com>
parents:
589
diff
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|
145 return true; |
40b707d7a809
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589
diff
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|
146 end |
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589
diff
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|
147 |
345
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|
148 module:log("debug", "Enabling stream management"); |
1520
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|
149 session.smacks = xmlns_sm; |
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150 |
1520
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|
151 wrap_session(session, false); |
1343
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|
152 |
345
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diff
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|
153 local resume_token; |
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|
154 local resume = stanza.attr.resume; |
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|
155 if resume == "true" or resume == "1" then |
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|
156 resume_token = uuid_generate(); |
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changeset
|
157 session_registry[resume_token] = session; |
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|
158 session.resumption_token = resume_token; |
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diff
changeset
|
159 end |
576
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diff
changeset
|
160 (session.sends2s or session.send)(st.stanza("enabled", { xmlns = xmlns_sm, id = resume_token, resume = resume })); |
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|
161 return true; |
1298
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|
162 end |
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|
163 module:hook_stanza(xmlns_sm2, "enable", function (session, stanza) return handle_enable(session, stanza, xmlns_sm2); end, 100); |
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|
164 module:hook_stanza(xmlns_sm3, "enable", function (session, stanza) return handle_enable(session, stanza, xmlns_sm3); end, 100); |
576
44b69c3d5351
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diff
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|
165 |
1530
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1529
diff
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|
166 module:hook_stanza("http://etherx.jabber.org/streams", "features", |
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|
167 function (session, stanza) |
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|
168 module:add_timer(0, function () |
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|
169 if can_do_smacks(session) then |
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|
170 if stanza:get_child("sm", xmlns_sm3) then |
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|
171 session.sends2s(st.stanza("enable", sm3_attr)); |
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|
172 session.smacks = xmlns_sm3; |
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|
173 elseif stanza:get_child("sm", xmlns_sm2) then |
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|
174 session.sends2s(st.stanza("enable", sm2_attr)); |
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|
175 session.smacks = xmlns_sm2; |
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|
176 else |
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|
177 return; |
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178 end |
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|
179 wrap_session_out(session, false); |
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180 end |
1531
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181 end); |
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182 end); |
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|
183 |
1298
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|
184 function handle_enabled(session, stanza, xmlns_sm) |
576
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|
185 module:log("debug", "Enabling stream management"); |
1520
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|
186 session.smacks = xmlns_sm; |
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187 |
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|
188 wrap_session_in(session, false); |
576
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diff
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|
189 |
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|
190 -- FIXME Resume? |
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|
191 |
345
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|
192 return true; |
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|
193 end |
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|
194 module:hook_stanza(xmlns_sm2, "enabled", function (session, stanza) return handle_enabled(session, stanza, xmlns_sm2); end, 100); |
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|
195 module:hook_stanza(xmlns_sm3, "enabled", function (session, stanza) return handle_enabled(session, stanza, xmlns_sm3); end, 100); |
160
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196 |
1298
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|
197 function handle_r(origin, stanza, xmlns_sm) |
160
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|
198 if not origin.smacks then |
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|
199 module:log("debug", "Received ack request from non-smack-enabled session"); |
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|
200 return; |
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diff
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|
201 end |
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mod_smacks: XEP-0198 Stream Management acks. Initial commit - very rough, useful mainly for testing at the moment, most certainly contains bugs :)
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diff
changeset
|
202 module:log("debug", "Received ack request, acking for %d", origin.handled_stanza_count); |
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203 -- Reply with <a> |
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204 (origin.sends2s or origin.send)(st.stanza("a", { xmlns = xmlns_sm, h = tostring(origin.handled_stanza_count) })); |
160
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205 return true; |
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206 end |
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207 module:hook_stanza(xmlns_sm2, "r", function (origin, stanza) return handle_r(origin, stanza, xmlns_sm2); end); |
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208 module:hook_stanza(xmlns_sm3, "r", function (origin, stanza) return handle_r(origin, stanza, xmlns_sm3); end); |
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209 |
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210 function handle_a(origin, stanza) |
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211 if not origin.smacks then return; end |
200
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212 origin.awaiting_ack = nil; |
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213 -- Remove handled stanzas from outgoing_stanza_queue |
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214 --log("debug", "ACK: h=%s, last=%s", stanza.attr.h or "", origin.last_acknowledged_stanza or ""); |
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215 local h = tonumber(stanza.attr.h); |
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216 if not h then |
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217 origin:close{ condition = "invalid-xml"; text = "Missing or invalid 'h' attribute"; }; |
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218 end |
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219 local handled_stanza_count = h-origin.last_acknowledged_stanza; |
220
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220 local queue = origin.outgoing_stanza_queue; |
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221 if handled_stanza_count > #queue then |
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222 origin.log("warn", "The client says it handled %d new stanzas, but we only sent %d :)", |
220
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223 handled_stanza_count, #queue); |
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224 origin.log("debug", "Client h: %d, our h: %d", tonumber(stanza.attr.h), origin.last_acknowledged_stanza); |
220
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225 for i=1,#queue do |
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226 origin.log("debug", "Q item %d: %s", i, tostring(queue[i])); |
220
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227 end |
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228 end |
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229 for i=1,math_min(handled_stanza_count,#queue) do |
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230 t_remove(origin.outgoing_stanza_queue, 1); |
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231 end |
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232 origin.log("debug", "#queue = %d", #queue); |
220
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233 origin.last_acknowledged_stanza = origin.last_acknowledged_stanza + handled_stanza_count; |
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234 return true; |
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235 end |
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236 module:hook_stanza(xmlns_sm2, "a", handle_a); |
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237 module:hook_stanza(xmlns_sm3, "a", handle_a); |
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238 |
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239 --TODO: Optimise... incoming stanzas should be handled by a per-session |
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240 -- function that has a counter as an upvalue (no table indexing for increments, |
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241 -- and won't slow non-198 sessions). We can also then remove the .handled flag |
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242 -- on stanzas |
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243 |
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244 function handle_unacked_stanzas(session) |
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245 local queue = session.outgoing_stanza_queue; |
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246 local error_attr = { type = "cancel" }; |
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247 if #queue > 0 then |
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248 session.outgoing_stanza_queue = {}; |
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249 for i=1,#queue do |
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250 local reply = st.reply(queue[i]); |
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251 if reply.attr.to ~= session.full_jid then |
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252 reply.attr.type = "error"; |
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253 reply:tag("error", error_attr) |
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254 :tag("recipient-unavailable", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}); |
256
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255 core_process_stanza(session, reply); |
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256 end |
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257 end |
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258 end |
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259 end |
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260 |
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261 module:hook("pre-resource-unbind", function (event) |
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262 local session, err = event.session, event.error; |
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263 if session.smacks then |
257
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264 if not session.resumption_token then |
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265 local queue = session.outgoing_stanza_queue; |
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266 if #queue > 0 then |
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267 session.log("warn", "Destroying session with %d unacked stanzas", #queue); |
257
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268 handle_unacked_stanzas(session); |
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269 end |
257
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270 else |
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271 session.log("debug", "mod_smacks hibernating session for up to %d seconds", resume_timeout); |
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272 local hibernate_time = os_time(); -- Track the time we went into hibernation |
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273 session.hibernating = hibernate_time; |
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274 local resumption_token = session.resumption_token; |
257
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275 timer.add_task(resume_timeout, function () |
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276 session.log("debug", "mod_smacks hibernation timeout reached..."); |
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277 -- We need to check the current resumption token for this resource |
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278 -- matches the smacks session this timer is for in case it changed |
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279 -- (for example, the client may have bound a new resource and |
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280 -- started a new smacks session, or not be using smacks) |
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281 local curr_session = full_sessions[session.full_jid]; |
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282 if session.destroyed then |
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283 session.log("debug", "The session has already been destroyed"); |
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284 elseif curr_session and curr_session.resumption_token == resumption_token |
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285 -- Check the hibernate time still matches what we think it is, |
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286 -- otherwise the session resumed and re-hibernated. |
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287 and session.hibernating == hibernate_time then |
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288 session.log("debug", "Destroying session for hibernating too long"); |
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289 session_registry[session.resumption_token] = nil; |
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290 session.resumption_token = nil; |
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291 sessionmanager.destroy_session(session); |
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292 else |
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293 session.log("debug", "Session resumed before hibernation timeout, all is well") |
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294 end |
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295 end); |
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296 return true; -- Postpone destruction for now |
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297 end |
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298 |
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299 end |
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300 end); |
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301 |
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302 local function handle_s2s_destroyed(event) |
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303 local session = event.session; |
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304 local queue = session.outgoing_stanza_queue; |
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305 if queue and #queue > 0 then |
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306 session.log("warn", "Destroying session with %d unacked stanzas", #queue); |
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307 if s2s_resend then |
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308 for i = 1, #queue do |
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309 module:send(queue[i]); |
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310 end |
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311 session.outgoing_stanza_queue = nil; |
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312 else |
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313 handle_unacked_stanzas(session); |
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314 end |
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315 end |
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316 end |
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317 |
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318 module:hook("s2sout-destroyed", handle_s2s_destroyed); |
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319 module:hook("s2sin-destroyed", handle_s2s_destroyed); |
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320 |
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321 function handle_resume(session, stanza, xmlns_sm) |
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322 if session.full_jid then |
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323 session.log("warn", "Tried to resume after resource binding"); |
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324 session.send(st.stanza("failed", { xmlns = xmlns_sm }) |
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325 :tag("unexpected-request", { xmlns = xmlns_errors }) |
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326 ); |
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327 return true; |
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328 end |
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329 |
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330 local id = stanza.attr.previd; |
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331 local original_session = session_registry[id]; |
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332 if not original_session then |
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333 session.log("debug", "Tried to resume non-existent session with id %s", id); |
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334 session.send(st.stanza("failed", { xmlns = xmlns_sm }) |
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335 :tag("item-not-found", { xmlns = xmlns_errors }) |
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336 ); |
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337 elseif session.username == original_session.username |
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338 and session.host == original_session.host then |
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339 session.log("debug", "mod_smacks resuming existing session..."); |
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340 -- TODO: All this should move to sessionmanager (e.g. session:replace(new_session)) |
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341 if original_session.conn then |
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342 session.log("debug", "mod_smacks closing an old connection for this session"); |
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343 local conn = original_session.conn; |
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344 c2s_sessions[conn] = nil; |
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345 conn:close(); |
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346 end |
345
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347 original_session.ip = session.ip; |
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348 original_session.conn = session.conn; |
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349 original_session.send = session.send; |
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350 original_session.filter = session.filter; |
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351 original_session.filter.session = original_session; |
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352 original_session.filters = session.filters; |
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353 original_session.stream = session.stream; |
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354 original_session.secure = session.secure; |
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355 original_session.hibernating = nil; |
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356 wrap_session(original_session, true); |
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357 -- Inform xmppstream of the new session (passed to its callbacks) |
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358 original_session.stream:set_session(original_session); |
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359 -- Similar for connlisteners |
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360 c2s_sessions[session.conn] = original_session; |
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361 |
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362 session.send(st.stanza("resumed", { xmlns = xmlns_sm, |
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363 h = original_session.handled_stanza_count, previd = id })); |
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364 |
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365 -- Fake an <a> with the h of the <resume/> from the client |
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366 original_session:dispatch_stanza(st.stanza("a", { xmlns = xmlns_sm, |
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367 h = stanza.attr.h })); |
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368 |
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369 -- Ok, we need to re-send any stanzas that the client didn't see |
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370 -- ...they are what is now left in the outgoing stanza queue |
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371 local queue = original_session.outgoing_stanza_queue; |
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372 session.log("debug", "#queue = %d", #queue); |
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373 for i=1,#queue do |
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374 session.send(queue[i]); |
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375 end |
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376 session.log("debug", "#queue = %d -- after send", #queue); |
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377 else |
755 | 378 module:log("warn", "Client %s@%s[%s] tried to resume stream for %s@%s[%s]", |
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379 session.username or "?", session.host or "?", session.type, |
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380 original_session.username or "?", original_session.host or "?", original_session.type); |
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381 session.send(st.stanza("failed", { xmlns = xmlns_sm }) |
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382 :tag("not-authorized", { xmlns = xmlns_errors })); |
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383 end |
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384 return true; |
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385 end |
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386 module:hook_stanza(xmlns_sm2, "resume", function (session, stanza) return handle_resume(session, stanza, xmlns_sm2); end); |
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387 module:hook_stanza(xmlns_sm3, "resume", function (session, stanza) return handle_resume(session, stanza, xmlns_sm3); end); |
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388 |
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389 local function handle_read_timeout(event) |
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390 local session = event.session; |
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391 if session.smacks then |
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392 if session.awaiting_ack then |
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393 return false; -- Kick the session |
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394 end |
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395 (session.sends2s or session.send)(st.stanza("r", { xmlns = session.smacks })); |
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396 session.awaiting_ack = true; |
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397 return true; |
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398 end |
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399 end |
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400 |
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401 module:hook("s2s-read-timeout", handle_read_timeout); |
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402 module:hook("c2s-read-timeout", handle_read_timeout); |