Mercurial > prosody-modules
annotate mod_smacks/mod_smacks.lua @ 1624:0f20390f6fa5
mod_munin: Implementation of the Munin collection protocol
author | Kim Alvefur <zash@zash.se> |
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date | Tue, 10 Mar 2015 16:39:08 +0100 |
parents | 8e006226e4c5 |
children | ad6694f7b13c |
rev | line source |
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160
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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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1 local st = require "util.stanza"; |
345
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2 local uuid_generate = require "util.uuid".generate; |
160
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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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3 |
9a7671720dec
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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4 local t_insert, t_remove = table.insert, table.remove; |
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mod_smacks: Fix the logic for handling outgoing stanzas and ack requests
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5 local math_min = math.min; |
345
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6 local os_time = os.time; |
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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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7 local tonumber, tostring = tonumber, tostring; |
201
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mod_smacks: Use filters for catching incoming stanzas (more reliable and efficient), also add some logic to make compatible with the stream resumption module (coming soon)
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8 local add_filter = require "util.filters".add_filter; |
257
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mod_smacks: Fixes for monkey-patched sessionmanager.destroy to handle stream resumption, and to fall back to stock destroy() if the session is not smacks-enabled.
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9 local timer = require "util.timer"; |
593
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Add a <delay> to stanzas that are queued (and don't have one already), so clients can show them with the original timestamp.
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10 local datetime = require "util.datetime"; |
160
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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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11 |
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12 local xmlns_sm2 = "urn:xmpp:sm:2"; |
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13 local xmlns_sm3 = "urn:xmpp:sm:3"; |
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mod_smacks: Merge mod_fastreconnect (resumption support), fix a number of bugs, refactor the code and add some more comments to explain process
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14 local xmlns_errors = "urn:ietf:params:xml:ns:xmpp-stanzas"; |
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15 local xmlns_delay = "urn:xmpp:delay"; |
160
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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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16 |
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17 local sm2_attr = { xmlns = xmlns_sm2 }; |
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18 local sm3_attr = { xmlns = xmlns_sm3 }; |
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19 |
641
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mod_smacks: get_option+_number
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20 local resume_timeout = module:get_option_number("smacks_hibernation_time", 300); |
576
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21 local s2s_smacks = module:get_option_boolean("smacks_enabled_s2s", false); |
642
842a8a3b0d81
mod_smacks: Make smacks_max_unacked_stanzas configurable
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22 local max_unacked_stanzas = module:get_option_number("smacks_max_unacked_stanzas", 0); |
754
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mod_smacks: Import prosody.core_process_stanza()
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23 local core_process_stanza = prosody.core_process_stanza; |
757
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mod_smacks: Use require to import (thanks a lot, autocomplete)
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24 local sessionmanager = require"core.sessionmanager"; |
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25 |
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26 local c2s_sessions = module:shared("/*/c2s/sessions"); |
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27 local session_registry = {}; |
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28 |
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29 local function can_do_smacks(session, advertise_only) |
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30 if session.smacks then return false, "unexpected-request", "Stream management is already enabled"; end |
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31 |
591
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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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32 local session_type = session.type; |
595
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Fix a typo in mod_smacks (type -> session_type).
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33 if session_type == "c2s" then |
591
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Matthew Wild <mwild1@gmail.com>
parents:
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34 if not(advertise_only) and not(session.resource) then -- Fail unless we're only advertising sm |
592
f9c73c1249cd
Update smacks to urn:xmpp:sm:3. Fix typo in can_do_smacks.
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35 return false, "unexpected-request", "Client must bind a resource before enabling stream management"; |
591
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36 end |
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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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parents:
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37 return true; |
595
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Fix a typo in mod_smacks (type -> session_type).
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38 elseif s2s_smacks and (session_type == "s2sin" or session_type == "s2sout") then |
591
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Matthew Wild <mwild1@gmail.com>
parents:
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39 return true; |
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)
Matthew Wild <mwild1@gmail.com>
parents:
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40 end |
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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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41 return false, "service-unavailable", "Stream management is not available for this stream"; |
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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)
Matthew Wild <mwild1@gmail.com>
parents:
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42 end |
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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)
Matthew Wild <mwild1@gmail.com>
parents:
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43 |
263
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44 module:hook("stream-features", |
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45 function (event) |
591
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46 if can_do_smacks(event.origin, true) then |
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47 event.features:tag("sm", sm2_attr):tag("optional"):up():up(); |
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48 event.features:tag("sm", sm3_attr):tag("optional"):up():up(); |
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49 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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parents:
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50 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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parents:
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51 |
9a7671720dec
mod_smacks: XEP-0198 Stream Management acks. Initial commit - very rough, useful mainly for testing at the moment, most certainly contains bugs :)
Matthew Wild <mwild1@gmail.com>
parents:
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52 module:hook("s2s-stream-features", |
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53 function (event) |
591
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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)
Matthew Wild <mwild1@gmail.com>
parents:
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54 if can_do_smacks(event.origin, true) then |
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55 event.features:tag("sm", sm2_attr):tag("optional"):up():up(); |
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56 event.features:tag("sm", sm3_attr):tag("optional"):up():up(); |
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mod_smacks: Fix smacks on s2s connections, but disable it by default.
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57 end |
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58 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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59 |
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60 local function outgoing_stanza_filter(stanza, session) |
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61 local is_stanza = stanza.attr and not stanza.attr.xmlns and not stanza.name:find":"; |
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62 if is_stanza and not stanza._cached then -- Stanza in default stream namespace |
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63 local queue = session.outgoing_stanza_queue; |
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64 local cached_stanza = st.clone(stanza); |
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65 cached_stanza._cached = true; |
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66 |
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67 if cached_stanza and cached_stanza.name ~= "iq" and cached_stanza:get_child("delay", xmlns_delay) == nil then |
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68 cached_stanza = cached_stanza:tag("delay", { xmlns = xmlns_delay, from = session.host, stamp = datetime.datetime()}); |
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69 end |
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70 |
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71 queue[#queue+1] = cached_stanza; |
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72 session.log("debug", "#queue = %d", #queue); |
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73 if session.hibernating then |
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74 session.log("debug", "hibernating, stanza queued"); |
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75 return ""; -- Hack to make session.send() not return nil |
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76 end |
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77 if #queue > max_unacked_stanzas and not session.awaiting_ack then |
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78 session.awaiting_ack = true; |
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79 return tostring(stanza)..tostring(st.stanza("r", { xmlns = session.smacks })); |
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80 end |
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81 end |
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82 return stanza; |
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83 end |
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84 |
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85 local function count_incoming_stanzas(stanza, session) |
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86 if not stanza.attr.xmlns then |
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87 session.handled_stanza_count = session.handled_stanza_count + 1; |
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88 session.log("debug", "Handled %d incoming stanzas", session.handled_stanza_count); |
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89 end |
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90 return stanza; |
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91 end |
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92 |
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93 local function wrap_session_out(session, resume) |
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94 if not resume then |
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95 session.outgoing_stanza_queue = {}; |
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96 session.last_acknowledged_stanza = 0; |
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97 end |
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98 |
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99 add_filter(session, "stanzas/out", outgoing_stanza_filter, -1000); |
988
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100 |
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101 local session_close = session.close; |
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102 function session.close(...) |
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103 if session.resumption_token then |
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104 session_registry[session.resumption_token] = nil; |
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105 session.resumption_token = nil; |
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106 end |
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107 return session_close(...); |
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108 end |
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109 return session; |
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110 end |
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111 |
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112 local function wrap_session_in(session, resume) |
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113 if not resume then |
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114 session.handled_stanza_count = 0; |
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115 add_filter(session, "stanzas/in", count_incoming_stanzas, 1000); |
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116 end |
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117 |
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118 return session; |
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119 end |
201
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120 |
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121 local function wrap_session(session, resume) |
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122 wrap_session_out(session, resume); |
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123 wrap_session_in(session, resume); |
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124 return session; |
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125 end |
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126 |
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127 function handle_enable(session, stanza, xmlns_sm) |
591
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128 local ok, err, err_text = can_do_smacks(session); |
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129 if not ok then |
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130 session.log("warn", "Failed to enable smacks: %s", err_text); -- TODO: XEP doesn't say we can send error text, should it? |
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131 (session.sends2s or session.send)(st.stanza("failed", { xmlns = xmlns_sm }):tag(err, { xmlns = xmlns_errors})); |
590
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132 return true; |
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133 end |
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134 |
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135 module:log("debug", "Enabling stream management"); |
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136 session.smacks = xmlns_sm; |
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137 |
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138 wrap_session(session, false); |
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139 |
345
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140 local resume_token; |
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141 local resume = stanza.attr.resume; |
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142 if resume == "true" or resume == "1" then |
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143 resume_token = uuid_generate(); |
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144 session_registry[resume_token] = session; |
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145 session.resumption_token = resume_token; |
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146 end |
576
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147 (session.sends2s or session.send)(st.stanza("enabled", { xmlns = xmlns_sm, id = resume_token, resume = resume })); |
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148 return true; |
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149 end |
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150 module:hook_stanza(xmlns_sm2, "enable", function (session, stanza) return handle_enable(session, stanza, xmlns_sm2); end, 100); |
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151 module:hook_stanza(xmlns_sm3, "enable", function (session, stanza) return handle_enable(session, stanza, xmlns_sm3); end, 100); |
576
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152 |
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153 module:hook_stanza("http://etherx.jabber.org/streams", "features", |
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154 function (session, stanza) |
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155 module:add_timer(0, function () |
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156 if can_do_smacks(session) then |
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157 if stanza:get_child("sm", xmlns_sm3) then |
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158 session.sends2s(st.stanza("enable", sm3_attr)); |
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159 session.smacks = xmlns_sm3; |
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160 elseif stanza:get_child("sm", xmlns_sm2) then |
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161 session.sends2s(st.stanza("enable", sm2_attr)); |
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162 session.smacks = xmlns_sm2; |
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163 else |
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164 return; |
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165 end |
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166 wrap_session_out(session, false); |
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167 end |
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168 end); |
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169 end); |
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170 |
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171 function handle_enabled(session, stanza, xmlns_sm) |
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172 module:log("debug", "Enabling stream management"); |
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173 session.smacks = xmlns_sm; |
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174 |
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175 wrap_session_in(session, false); |
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176 |
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177 -- FIXME Resume? |
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178 |
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179 return true; |
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180 end |
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181 module:hook_stanza(xmlns_sm2, "enabled", function (session, stanza) return handle_enabled(session, stanza, xmlns_sm2); end, 100); |
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182 module:hook_stanza(xmlns_sm3, "enabled", function (session, stanza) return handle_enabled(session, stanza, xmlns_sm3); end, 100); |
160
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183 |
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184 function handle_r(origin, stanza, xmlns_sm) |
160
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185 if not origin.smacks then |
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186 module:log("debug", "Received ack request from non-smack-enabled session"); |
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187 return; |
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188 end |
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189 module:log("debug", "Received ack request, acking for %d", origin.handled_stanza_count); |
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190 -- Reply with <a> |
255
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220
diff
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|
191 (origin.sends2s or origin.send)(st.stanza("a", { xmlns = xmlns_sm, h = tostring(origin.handled_stanza_count) })); |
160
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192 return true; |
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193 end |
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194 module:hook_stanza(xmlns_sm2, "r", function (origin, stanza) return handle_r(origin, stanza, xmlns_sm2); end); |
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195 module:hook_stanza(xmlns_sm3, "r", function (origin, stanza) return handle_r(origin, stanza, xmlns_sm3); end); |
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196 |
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197 function handle_a(origin, stanza) |
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198 if not origin.smacks then return; end |
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199 origin.awaiting_ack = nil; |
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200 -- Remove handled stanzas from outgoing_stanza_queue |
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201 --log("debug", "ACK: h=%s, last=%s", stanza.attr.h or "", origin.last_acknowledged_stanza or ""); |
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202 local h = tonumber(stanza.attr.h); |
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203 if not h then |
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204 origin:close{ condition = "invalid-xml"; text = "Missing or invalid 'h' attribute"; }; |
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205 end |
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206 local handled_stanza_count = h-origin.last_acknowledged_stanza; |
220
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207 local queue = origin.outgoing_stanza_queue; |
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208 if handled_stanza_count > #queue then |
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209 origin.log("warn", "The client says it handled %d new stanzas, but we only sent %d :)", |
220
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210 handled_stanza_count, #queue); |
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211 origin.log("debug", "Client h: %d, our h: %d", tonumber(stanza.attr.h), origin.last_acknowledged_stanza); |
220
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212 for i=1,#queue do |
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213 origin.log("debug", "Q item %d: %s", i, tostring(queue[i])); |
220
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214 end |
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215 end |
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216 for i=1,math_min(handled_stanza_count,#queue) do |
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217 t_remove(origin.outgoing_stanza_queue, 1); |
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218 end |
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219 origin.log("debug", "#queue = %d", #queue); |
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220 origin.last_acknowledged_stanza = origin.last_acknowledged_stanza + handled_stanza_count; |
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221 return true; |
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222 end |
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223 module:hook_stanza(xmlns_sm2, "a", handle_a); |
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224 module:hook_stanza(xmlns_sm3, "a", handle_a); |
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225 |
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226 --TODO: Optimise... incoming stanzas should be handled by a per-session |
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227 -- function that has a counter as an upvalue (no table indexing for increments, |
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228 -- and won't slow non-198 sessions). We can also then remove the .handled flag |
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229 -- on stanzas |
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230 |
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231 function handle_unacked_stanzas(session) |
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232 local queue = session.outgoing_stanza_queue; |
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233 local error_attr = { type = "cancel" }; |
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234 if #queue > 0 then |
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235 session.outgoing_stanza_queue = {}; |
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236 for i=1,#queue do |
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237 local reply = st.reply(queue[i]); |
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238 if reply.attr.to ~= session.full_jid then |
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239 reply.attr.type = "error"; |
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240 reply:tag("error", error_attr) |
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241 :tag("recipient-unavailable", {xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}); |
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242 core_process_stanza(session, reply); |
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243 end |
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244 end |
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245 end |
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246 end |
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247 |
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248 module:hook("pre-resource-unbind", function (event) |
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249 local session, err = event.session, event.error; |
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250 if session.smacks then |
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251 if not session.resumption_token then |
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252 local queue = session.outgoing_stanza_queue; |
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253 if #queue > 0 then |
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254 session.log("warn", "Destroying session with %d unacked stanzas", #queue); |
257
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255 handle_unacked_stanzas(session); |
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256 end |
257
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257 else |
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258 session.log("debug", "mod_smacks hibernating session for up to %d seconds", resume_timeout); |
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259 local hibernate_time = os_time(); -- Track the time we went into hibernation |
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260 session.hibernating = hibernate_time; |
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261 local resumption_token = session.resumption_token; |
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262 timer.add_task(resume_timeout, function () |
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263 session.log("debug", "mod_smacks hibernation timeout reached..."); |
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264 -- We need to check the current resumption token for this resource |
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265 -- matches the smacks session this timer is for in case it changed |
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266 -- (for example, the client may have bound a new resource and |
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267 -- started a new smacks session, or not be using smacks) |
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268 local curr_session = full_sessions[session.full_jid]; |
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269 if session.destroyed then |
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270 session.log("debug", "The session has already been destroyed"); |
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271 elseif curr_session and curr_session.resumption_token == resumption_token |
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272 -- Check the hibernate time still matches what we think it is, |
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273 -- otherwise the session resumed and re-hibernated. |
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274 and session.hibernating == hibernate_time then |
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275 session.log("debug", "Destroying session for hibernating too long"); |
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276 session_registry[session.resumption_token] = nil; |
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277 session.resumption_token = nil; |
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278 sessionmanager.destroy_session(session); |
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279 else |
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280 session.log("debug", "Session resumed before hibernation timeout, all is well") |
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281 end |
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282 end); |
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283 return true; -- Postpone destruction for now |
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284 end |
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285 |
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286 end |
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287 end); |
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288 |
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289 function handle_resume(session, stanza, xmlns_sm) |
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290 if session.full_jid then |
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291 session.log("warn", "Tried to resume after resource binding"); |
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292 session.send(st.stanza("failed", { xmlns = xmlns_sm }) |
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293 :tag("unexpected-request", { xmlns = xmlns_errors }) |
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294 ); |
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295 return true; |
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296 end |
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297 |
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298 local id = stanza.attr.previd; |
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299 local original_session = session_registry[id]; |
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300 if not original_session then |
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301 session.log("debug", "Tried to resume non-existent session with id %s", id); |
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302 session.send(st.stanza("failed", { xmlns = xmlns_sm }) |
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303 :tag("item-not-found", { xmlns = xmlns_errors }) |
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304 ); |
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305 elseif session.username == original_session.username |
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306 and session.host == original_session.host then |
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307 session.log("debug", "mod_smacks resuming existing session..."); |
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308 -- TODO: All this should move to sessionmanager (e.g. session:replace(new_session)) |
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309 if original_session.conn then |
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310 session.log("debug", "mod_smacks closing an old connection for this session"); |
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311 local conn = original_session.conn; |
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312 c2s_sessions[conn] = nil; |
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313 conn:close(); |
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314 end |
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315 original_session.ip = session.ip; |
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316 original_session.conn = session.conn; |
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317 original_session.send = session.send; |
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318 original_session.send.filter = original_session.filter; |
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319 original_session.stream = session.stream; |
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320 original_session.secure = session.secure; |
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321 original_session.hibernating = nil; |
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322 wrap_session(original_session, true); |
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323 -- Inform xmppstream of the new session (passed to its callbacks) |
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324 original_session.stream:set_session(original_session); |
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325 -- Similar for connlisteners |
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326 c2s_sessions[session.conn] = original_session; |
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327 |
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328 session.send(st.stanza("resumed", { xmlns = xmlns_sm, |
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329 h = original_session.handled_stanza_count, previd = id })); |
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330 |
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331 -- Fake an <a> with the h of the <resume/> from the client |
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332 original_session:dispatch_stanza(st.stanza("a", { xmlns = xmlns_sm, |
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333 h = stanza.attr.h })); |
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334 |
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335 -- Ok, we need to re-send any stanzas that the client didn't see |
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336 -- ...they are what is now left in the outgoing stanza queue |
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337 local queue = original_session.outgoing_stanza_queue; |
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338 session.log("debug", "#queue = %d", #queue); |
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339 for i=1,#queue do |
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340 session.send(queue[i]); |
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341 end |
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342 session.log("debug", "#queue = %d -- after send", #queue); |
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343 else |
755 | 344 module:log("warn", "Client %s@%s[%s] tried to resume stream for %s@%s[%s]", |
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345 session.username or "?", session.host or "?", session.type, |
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346 original_session.username or "?", original_session.host or "?", original_session.type); |
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347 session.send(st.stanza("failed", { xmlns = xmlns_sm }) |
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348 :tag("not-authorized", { xmlns = xmlns_errors })); |
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349 end |
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350 return true; |
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351 end |
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352 module:hook_stanza(xmlns_sm2, "resume", function (session, stanza) return handle_resume(session, stanza, xmlns_sm2); end); |
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353 module:hook_stanza(xmlns_sm3, "resume", function (session, stanza) return handle_resume(session, stanza, xmlns_sm3); end); |