Sat, 27 Nov 2010 19:47:35 +0000
storage/mod_storage: Remove, obsolete
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1 | -- Prosody IM |
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2 | -- Copyright (C) 2008-2010 Matthew Wild |
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3 | -- Copyright (C) 2008-2010 Waqas Hussain |
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4 | -- |
758 | 5 | -- This project is MIT/X11 licensed. Please see the |
6 | -- COPYING file in the source package for more information. | |
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7 | -- |
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8 | |
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9 | |
38 | 10 | |
11 | local st = require "util.stanza"; | |
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Resource binding, XMPP sessions (whatever they're for...)
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12 | local sm_bind_resource = require "core.sessionmanager".bind_resource; |
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13 | local sm_make_authenticated = require "core.sessionmanager".make_authenticated; |
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Stopped using the lbase64 library
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14 | local base64 = require "util.encodings".base64; |
38 | 15 | |
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16 | local nodeprep = require "util.encodings".stringprep.nodeprep; |
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17 | local usermanager_get_sasl_handler = require "core.usermanager".get_sasl_handler; |
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18 | local t_concat, t_insert = table.concat, table.insert; |
38 | 19 | local tostring = tostring; |
20 | ||
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21 | local secure_auth_only = module:get_option("c2s_require_encryption") or module:get_option("require_encryption"); |
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22 | local anonymous_login = module:get_option("anonymous_login"); |
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23 | local allow_unencrypted_plain_auth = module:get_option("allow_unencrypted_plain_auth") |
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24 | |
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25 | local log = module._log; |
38 | 26 | |
27 | local xmlns_sasl ='urn:ietf:params:xml:ns:xmpp-sasl'; | |
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28 | local xmlns_bind ='urn:ietf:params:xml:ns:xmpp-bind'; |
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29 | local xmlns_stanzas ='urn:ietf:params:xml:ns:xmpp-stanzas'; |
38 | 30 | |
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31 | local new_sasl = require "util.sasl".new; |
38 | 32 | |
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33 | local anonymous_authentication_profile = { |
2189 | 34 | anonymous = function(username, realm) |
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35 | return true; -- for normal usage you should always return true here |
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36 | end |
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37 | }; |
38 | 38 | |
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39 | local function build_reply(status, ret, err_msg) |
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40 | local reply = st.stanza(status, {xmlns = xmlns_sasl}); |
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41 | if status == "challenge" then |
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42 | --log("debug", "CHALLENGE: %s", ret or ""); |
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43 | reply:text(base64.encode(ret or "")); |
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44 | elseif status == "failure" then |
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45 | reply:tag(ret):up(); |
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46 | if err_msg then reply:tag("text"):text(err_msg); end |
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47 | elseif status == "success" then |
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48 | --log("debug", "SUCCESS: %s", ret or ""); |
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49 | reply:text(base64.encode(ret or "")); |
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50 | else |
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51 | module:log("error", "Unknown sasl status: %s", status); |
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52 | end |
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53 | return reply; |
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54 | end |
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55 | |
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56 | local function handle_status(session, status, ret, err_msg) |
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57 | if status == "failure" then |
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58 | session.sasl_handler = session.sasl_handler:clean_clone(); |
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59 | elseif status == "success" then |
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60 | local username = nodeprep(session.sasl_handler.username); |
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61 | |
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62 | local ok, err = sm_make_authenticated(session, session.sasl_handler.username); |
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63 | if ok then |
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64 | session.sasl_handler = nil; |
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65 | session:reset_stream(); |
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66 | else |
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67 | module:log("warn", "SASL succeeded but username was invalid"); |
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68 | session.sasl_handler = session.sasl_handler:clean_clone(); |
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69 | return "failure", "not-authorized", "User authenticated successfully, but username was invalid"; |
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70 | end |
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71 | end |
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72 | return status, ret, err_msg; |
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73 | end |
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74 | |
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75 | local function sasl_process_cdata(session, stanza) |
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76 | local text = stanza[1]; |
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77 | if text then |
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78 | text = base64.decode(text); |
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79 | --log("debug", "AUTH: %s", text:gsub("[%z\001-\008\011\012\014-\031]", " ")); |
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80 | if not text then |
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81 | session.sasl_handler = nil; |
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82 | session.send(build_reply("failure", "incorrect-encoding")); |
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83 | return true; |
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84 | end |
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85 | end |
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86 | local status, ret, err_msg = session.sasl_handler:process(text); |
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87 | status, ret, err_msg = handle_status(session, status, ret, err_msg); |
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88 | local s = build_reply(status, ret, err_msg); |
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89 | log("debug", "sasl reply: %s", tostring(s)); |
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90 | session.send(s); |
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91 | return true; |
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92 | end |
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93 | |
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94 | module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:auth", function(event) |
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95 | local session, stanza = event.origin, event.stanza; |
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96 | if session.type ~= "c2s_unauthed" then return; end |
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97 | |
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98 | if session.sasl_handler and session.sasl_handler.selected then |
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99 | session.sasl_handler = nil; -- allow starting a new SASL negotiation before completing an old one |
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100 | end |
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101 | if not session.sasl_handler then |
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102 | if anonymous_login then |
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103 | session.sasl_handler = new_sasl(module.host, anonymous_authentication_profile); |
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104 | else |
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105 | session.sasl_handler = usermanager_get_sasl_handler(module.host); |
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106 | end |
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107 | end |
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108 | local mechanism = stanza.attr.mechanism; |
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109 | if anonymous_login then |
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110 | if mechanism ~= "ANONYMOUS" then |
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111 | session.send(build_reply("failure", "invalid-mechanism")); |
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112 | return true; |
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113 | end |
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114 | elseif mechanism == "ANONYMOUS" then |
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115 | session.send(build_reply("failure", "mechanism-too-weak")); |
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116 | return true; |
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117 | end |
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118 | if not session.secure and (secure_auth_only or (mechanism == "PLAIN" and not allow_unencrypted_plain_auth)) then |
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119 | session.send(build_reply("failure", "encryption-required")); |
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120 | return true; |
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121 | end |
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122 | local valid_mechanism = session.sasl_handler:select(mechanism); |
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123 | if not valid_mechanism then |
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124 | session.send(build_reply("failure", "invalid-mechanism")); |
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125 | return true; |
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126 | end |
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127 | return sasl_process_cdata(session, stanza); |
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128 | end); |
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129 | module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:response", function(event) |
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130 | local session = event.origin; |
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131 | if not(session.sasl_handler and session.sasl_handler.selected) then |
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132 | session.send(build_reply("failure", "not-authorized", "Out of order SASL element")); |
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133 | return true; |
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134 | end |
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135 | return sasl_process_cdata(session, event.stanza); |
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136 | end); |
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137 | module:hook("stanza/urn:ietf:params:xml:ns:xmpp-sasl:abort", function(event) |
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138 | local session = event.origin; |
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139 | session.sasl_handler = nil; |
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140 | session.send(build_reply("failure", "aborted")); |
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141 | return true; |
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142 | end); |
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143 | |
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144 | local mechanisms_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-sasl' }; |
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145 | local bind_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-bind' }; |
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146 | local xmpp_session_attr = { xmlns='urn:ietf:params:xml:ns:xmpp-session' }; |
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147 | module:hook("stream-features", function(event) |
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148 | local origin, features = event.origin, event.features; |
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149 | if not origin.username then |
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150 | if secure_auth_only and not origin.secure then |
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151 | return; |
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152 | end |
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153 | if anonymous_login then |
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154 | origin.sasl_handler = new_sasl(module.host, anonymous_authentication_profile); |
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155 | else |
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156 | origin.sasl_handler = usermanager_get_sasl_handler(module.host); |
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157 | end |
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158 | features:tag("mechanisms", mechanisms_attr); |
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159 | for mechanism in pairs(origin.sasl_handler:mechanisms()) do |
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160 | if mechanism ~= "PLAIN" or origin.secure or allow_unencrypted_plain_auth then |
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161 | features:tag("mechanism"):text(mechanism):up(); |
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162 | end |
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163 | end |
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164 | features:up(); |
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165 | else |
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166 | features:tag("bind", bind_attr):tag("required"):up():up(); |
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167 | features:tag("session", xmpp_session_attr):tag("optional"):up():up(); |
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168 | end |
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169 | end); |
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170 | |
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171 | module:hook("iq/self/urn:ietf:params:xml:ns:xmpp-bind:bind", function(event) |
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172 | local origin, stanza = event.origin, event.stanza; |
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173 | local resource; |
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174 | if stanza.attr.type == "set" then |
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175 | local bind = stanza.tags[1]; |
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176 | resource = bind:child_with_name("resource"); |
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177 | resource = resource and #resource.tags == 0 and resource[1] or nil; |
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178 | end |
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179 | local success, err_type, err, err_msg = sm_bind_resource(origin, resource); |
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180 | if success then |
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181 | origin.send(st.reply(stanza) |
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182 | :tag("bind", { xmlns = xmlns_bind }) |
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183 | :tag("jid"):text(origin.full_jid)); |
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184 | origin.log("debug", "Resource bound: %s", origin.full_jid); |
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185 | else |
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186 | origin.send(st.error_reply(stanza, err_type, err, err_msg)); |
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187 | origin.log("debug", "Resource bind failed: %s", err_msg or err); |
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188 | end |
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189 | return true; |
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190 | end); |
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191 | |
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192 | module:hook("iq/self/urn:ietf:params:xml:ns:xmpp-session:session", function(event) |
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193 | event.origin.send(st.reply(event.stanza)); |
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194 | return true; |
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195 | end); |