prosody-modules
e7b9bc629ecc
mod_bidi/mod_bidi.lua

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mod_bidi/mod_bidi.lua @ 4941:e7b9bc629ecc

mod_rest: Add special handling to catch MAM results from remote hosts Makes MAM queries to remote hosts works. As the comment says, MAM results from users' local archives or local MUCs are returned via origin.send() which is provided in the event and thus already worked. Results from remote hosts go via normal stanza routing and events, which need this extra handling to catch. This pattern of iq-set, message+, iq-result is generally limited to MAM. Closest similar thing might be MUC join, but to really handle that you would need the webhook callback mechanism.
author Kim Alvefur <zash@zash.se>
date Mon, 16 May 2022 19:47:09 +0200
parent 3721:c96a53bf67b3
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 origin.outgoing = true;
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40 elseif origin.type == "s2sout" then -- handle incoming stanzas correctly
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41 local bidi_session = {
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42 type = "s2sin"; direction = "incoming";
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43 incoming = true;
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44 is_bidi = true; orig_session = origin;
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45 to_host = origin.from_host;
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46 from_host = origin.to_host;
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47 hosts = {};
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48 }
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49 origin.bidi_session = bidi_session;
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50 setmetatable(bidi_session, { __index = origin });
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51 module:fire_event("s2s-authenticated", { session = bidi_session, host = origin.to_host });
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52 local remote_host = origin.to_host;
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53 add_filter(origin, "stanzas/in", function(stanza)
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54 if stanza.attr.xmlns ~= nil then return stanza end
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55 local _, host = jid_split(stanza.attr.from);
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56 if host ~= remote_host then return stanza end
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57 handlestanza(bidi_session, stanza);
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58 end, 1);
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59 end
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60 end
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61
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62 module:hook("route/remote", function(event)
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63 local from_host, to_host, stanza = event.from_host, event.to_host, event.stanza;
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64 if from_host ~= module.host then return end
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65 local to_session = bidi_sessions[to_host];
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66 if not to_session or to_session.type ~= "s2sin" then return end
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67 if to_session.sends2s(stanza) then return true end
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68 end, -2);
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69
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70 -- Incoming s2s
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71 module:hook("s2s-stream-features", function(event)
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72 local origin, features = event.origin, event.features;
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73 if not origin.is_bidi and not origin.bidi_session and not origin.do_bidi
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74 and not hosts[module.host].s2sout[origin.from_host]
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75 and not disable_bidi_for:contains(origin.from_host)
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76 and (not secure_only or (origin.cert_chain_status == "valid"
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77 and origin.cert_identity_status == "valid")) then
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78 if origin.incoming == true then
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79 module:log("warn", "This module can now be replaced by mod_s2s_bidi which is included with Prosody");
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80 end
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81 module:log("debug", "Announcing support for bidirectional streams");
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82 features:tag("bidi", { xmlns = xmlns_bidi_feature }):up();
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83 end
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84 end);
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85
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86 module:hook("stanza/urn:xmpp:bidi:bidi", function(event)
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87 local origin = event.session or event.origin;
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88 if not origin.is_bidi and not origin.bidi_session
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89 and not disable_bidi_for:contains(origin.from_host)
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90 and (not secure_only or origin.cert_chain_status == "valid"
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91 and origin.cert_identity_status == "valid") then
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92 module:log("debug", "%s requested bidirectional stream", origin.from_host);
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93 origin.do_bidi = true;
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94 return true;
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95 end
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96 end);
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97
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98 -- Outgoing s2s
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99 module:hook("stanza/http://etherx.jabber.org/streams:features", function(event)
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100 local origin = event.session or event.origin;
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101 if not ( origin.bidi_session or origin.is_bidi or origin.do_bidi)
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102 and not disable_bidi_for:contains(origin.to_host)
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103 and event.stanza:get_child("bidi", xmlns_bidi_feature)
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104 and (not secure_only or origin.cert_chain_status == "valid"
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105 and origin.cert_identity_status == "valid") then
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106 if origin.outgoing == true then
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107 module:log("warn", "This module can now be replaced by mod_s2s_bidi which is included with Prosody");
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108 end
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109 module:log("debug", "%s supports bidirectional streams", origin.to_host);
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110 origin.sends2s(st.stanza("bidi", { xmlns = xmlns_bidi }));
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111 origin.do_bidi = true;
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112 end
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113 end, 160);
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114
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115 function enable_bidi(event)
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116 local session = event.session;
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117 if session.do_bidi and not ( session.is_bidi or session.bidi_session ) then
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118 session.do_bidi = nil;
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119 new_bidi(session);
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120 end
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121 end
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122
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123 module:hook("s2sin-established", enable_bidi);
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124 module:hook("s2sout-established", enable_bidi);
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125
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126 function disable_bidi(event)
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127 local session = event.session;
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128 if session.type == "s2sin" then
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129 bidi_sessions[session.from_host] = nil;
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130 end
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131 end
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132
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133 module:hook("s2sin-destroyed", disable_bidi);
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134 module:hook("s2sout-destroyed", disable_bidi);
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135