Mercurial > prosody-modules

annotate mod_bidi/mod_bidi.lua @ 2491:5fbca7de2088

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mod_smacks: Send out more ack requests where needed Under some circumstances it was possible that more than "max_unacked_stanzas" where left in the outgoing stanza queue without forcing an ack. This could happen, when more stanzas entered the queue while the last ack request was still unanswered. Now the test "#queue > max_unacked_stanzas" is done upon receiving an ack as well as when sending out stanzas, which fixes this bug.
author tmolitor <thilo@eightysoft.de>
date Sun, 12 Feb 2017 19:27:50 +0100
parents db2ff8f29472
children 8e7d400d4db3
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
892
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1 -- Bidirectional Server-to-Server Connections
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2 -- http://xmpp.org/extensions/xep-0288.html
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3 -- Copyright (C) 2013 Kim Alvefur
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4 --
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5 -- This file is MIT/X11 licensed.
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6 --
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7 local add_filter = require "util.filters".add_filter;
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8 local st = require "util.stanza";
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9 local jid_split = require"util.jid".prepped_split;
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10 local core_process_stanza = prosody.core_process_stanza;
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11 local traceback = debug.traceback;
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12 local hosts = hosts;
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13 local xmlns_bidi_feature = "urn:xmpp:features:bidi"
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14 local xmlns_bidi = "urn:xmpp:bidi";
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15 local secure_only = module:get_option_boolean("secure_bidi_only", true);
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16 local disable_bidi_for = module:get_option_set("no_bidi_with", { });
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17 local bidi_sessions = module:shared"sessions-cache";
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18
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19 local function handleerr(err) log("error", "Traceback[s2s]: %s: %s", tostring(err), traceback()); end
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20 local function handlestanza(session, stanza)
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21 if stanza.attr.xmlns == "jabber:client" then --COMPAT: Prosody pre-0.6.2 may send jabber:client
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22 stanza.attr.xmlns = nil;
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23 end
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24 -- stanza = session.filter("stanzas/in", stanza);
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25 if stanza then
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26 return xpcall(function () return core_process_stanza(session, stanza) end, handleerr);
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27 end
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28 end
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29
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30 local function new_bidi(origin)
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31 if origin.type == "s2sin" then -- then we create an "outgoing" bidirectional session
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32 local conflicting_session = hosts[origin.to_host].s2sout[origin.from_host]
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33 if conflicting_session then
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34 conflicting_session.log("info", "We already have an outgoing connection to %s, closing it...", origin.from_host);
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35 conflicting_session:close{ condition = "conflict", text = "Replaced by bidirectional stream" }
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36 end
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37 bidi_sessions[origin.from_host] = origin;
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38 origin.is_bidi = true;
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39 elseif origin.type == "s2sout" then -- handle incoming stanzas correctly
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40 local bidi_session = {
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41 type = "s2sin"; direction = "incoming";
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42 is_bidi = true; orig_session = origin;
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43 to_host = origin.from_host;
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44 from_host = origin.to_host;
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45 hosts = {};
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46 }
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47 origin.bidi_session = bidi_session;
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48 setmetatable(bidi_session, { __index = origin });
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49 module:fire_event("s2s-authenticated", { session = bidi_session, host = origin.to_host });
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50 local remote_host = origin.to_host;
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51 add_filter(origin, "stanzas/in", function(stanza)
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52 if stanza.attr.xmlns ~= nil then return stanza end
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53 local _, host = jid_split(stanza.attr.from);
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54 if host ~= remote_host then return stanza end
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55 handlestanza(bidi_session, stanza);
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56 end, 1);
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57 end
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58 end
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59
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60 module:hook("route/remote", function(event)
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61 local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza;
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62 if from_host ~= module.host then return end
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63 local to_session = bidi_sessions[to_host];
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64 if not to_session or to_session.type ~= "s2sin" then return end
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65 if to_session.sends2s(stanza) then return true end
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66 end, -2);
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67
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68 -- Incoming s2s
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69 module:hook("s2s-stream-features", function(event)
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70 local origin, features = event.origin, event.features;
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71 if not origin.is_bidi and not origin.bidi_session and not origin.do_bidi
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72 and not hosts[module.host].s2sout[origin.from_host]
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73 and not disable_bidi_for:contains(origin.from_host)
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74 and (not secure_only or (origin.cert_chain_status == "valid"
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75 and origin.cert_identity_status == "valid")) then
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76 module:log("debug", "Announcing support for bidirectional streams");
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77 features:tag("bidi", { xmlns = xmlns_bidi_feature }):up();
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78 end
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79 end);
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80
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81 module:hook("stanza/urn:xmpp:bidi:bidi", function(event)
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82 local origin = event.session or event.origin;
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83 if not origin.is_bidi and not origin.bidi_session
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84 and not disable_bidi_for:contains(origin.from_host)
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85 and (not secure_only or origin.cert_chain_status == "valid"
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86 and origin.cert_identity_status == "valid") then
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87 module:log("debug", "%s requested bidirectional stream", origin.from_host);
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88 origin.do_bidi = true;
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89 return true;
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90 end
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91 end);
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92
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93 -- Outgoing s2s
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94 module:hook("stanza/http://etherx.jabber.org/streams:features", function(event)
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95 local origin = event.session or event.origin;
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96 if not ( origin.bidi_session or origin.is_bidi or origin.do_bidi)
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97 and not disable_bidi_for:contains(origin.to_host)
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98 and event.stanza:get_child("bidi", xmlns_bidi_feature)
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99 and (not secure_only or origin.cert_chain_status == "valid"
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100 and origin.cert_identity_status == "valid") then
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101 module:log("debug", "%s supports bidirectional streams", origin.to_host);
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102 origin.sends2s(st.stanza("bidi", { xmlns = xmlns_bidi }));
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103 origin.do_bidi = true;
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104 end
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105 end, 160);
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106
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107 function enable_bidi(event)
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108 local session = event.session;
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109 if session.do_bidi and not ( session.is_bidi or session.bidi_session ) then
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110 session.do_bidi = nil;
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111 new_bidi(session);
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112 end
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113 end
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114
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115 module:hook("s2sin-established", enable_bidi);
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116 module:hook("s2sout-established", enable_bidi);
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117
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118 function disable_bidi(event)
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119 local session = event.session;
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120 if session.type == "s2sin" then
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121 bidi_sessions[session.from_host] = nil;
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122 end
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123 end
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124
148865199003 mod_bidi: Initial commit of XEP-0288 implementation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
125 module:hook("s2sin-destroyed", disable_bidi);
148865199003 mod_bidi: Initial commit of XEP-0288 implementation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
126 module:hook("s2sout-destroyed", disable_bidi);
148865199003 mod_bidi: Initial commit of XEP-0288 implementation
Kim Alvefur <zash@zash.se>
parents:
diff changeset
127