Mercurial > prosody-modules
annotate mod_client_proxy/mod_client_proxy.lua @ 4782:b935276ab1b4
mod_limits: Obsolete this module, it is included in Prosody since 0.10
author | Emmanuel Gil Peyrot <linkmauve@linkmauve.fr> |
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date | Fri, 09 Jul 2021 20:54:40 +0200 |
parents | a14a573d43ff |
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rev | line source |
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1 if module:get_host_type() ~= "component" then |
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2 error("proxy_component should be loaded as component", 0); |
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3 end |
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4 |
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5 local jid_split = require "util.jid".split; |
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6 local jid_bare = require "util.jid".bare; |
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7 local jid_prep = require "util.jid".prep; |
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8 local st = require "util.stanza"; |
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9 local array = require "util.array"; |
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10 |
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11 local target_address = module:get_option_string("target_address"); |
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12 |
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13 sessions = array{}; |
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14 local sessions = sessions; |
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15 |
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16 local function handle_target_presence(stanza) |
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17 local type = stanza.attr.type; |
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18 module:log("debug", "received presence from destination: %s", type) |
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19 local _, _, resource = jid_split(stanza.attr.from); |
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20 if type == "error" then |
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21 -- drop all known sessions |
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22 for k in pairs(sessions) do |
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23 sessions[k] = nil |
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24 end |
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25 module:log( |
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26 "debug", |
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27 "received error presence, dropping all target sessions", |
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28 resource |
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29 ) |
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30 elseif type == "unavailable" then |
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31 for k in pairs(sessions) do |
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32 if sessions[k] == resource then |
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33 sessions[k] = nil |
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34 module:log( |
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35 "debug", |
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36 "dropped target session: %s", |
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37 resource |
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38 ) |
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39 break |
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40 end |
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41 end |
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42 elseif not type then |
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43 -- available |
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44 local found = false; |
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45 for k in pairs(sessions) do |
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46 if sessions[k] == resource then |
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47 found = true; |
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48 break |
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49 end |
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50 end |
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51 if not found then |
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52 module:log( |
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53 "debug", |
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54 "registered new target session: %s", |
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55 resource |
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56 ) |
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57 sessions:push(resource) |
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58 end |
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59 end |
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60 end |
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61 |
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62 local function handle_from_target(stanza) |
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63 local type = stanza.attr.type |
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64 module:log( |
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65 "debug", |
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66 "non-presence stanza from target: name = %s, type = %s", |
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67 stanza.name, |
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68 type |
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69 ) |
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70 if stanza.name == "iq" then |
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71 if type == "error" or type == "result" then |
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72 -- de-NAT message |
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73 local _, _, denatted_to_unprepped = jid_split(stanza.attr.to); |
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74 local denatted_to = jid_prep(denatted_to_unprepped); |
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75 if not denatted_to then |
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76 module:log( |
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77 "debug", |
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78 "cannot de-NAT stanza, invalid to: %s", |
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79 denatted_to_unprepped |
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80 ) |
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81 return |
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82 end |
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83 local denatted_from = module:get_host(); |
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84 |
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85 module:log( |
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86 "debug", |
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87 "de-NAT-ed stanza: from: %s -> %s, to: %s -> %s", |
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88 stanza.attr.from, |
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89 denatted_from, |
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90 stanza.attr.to, |
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91 denatted_to |
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92 ) |
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93 |
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94 stanza.attr.from = denatted_from |
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95 stanza.attr.to = denatted_to |
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96 |
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97 module:send(stanza) |
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98 else |
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99 -- FIXME: we don’t support NATing outbund requests atm. |
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100 module:send(st.error_reply(stanza, "cancel", "feature-not-implemented")) |
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101 end |
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102 elseif stanza.name == "message" then |
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103 -- not implemented yet, we need a way to ensure that routing doesn’t |
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104 -- break |
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105 module:send(st.error_reply(stanza, "cancel", "feature-not-implemented")) |
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106 end |
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107 end |
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108 |
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109 local function handle_to_target(stanza) |
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110 local type = stanza.attr.type; |
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111 module:log( |
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112 "debug", |
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113 "stanza to target: name = %s, type = %s", |
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114 stanza.name, type |
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115 ) |
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116 if stanza.name == "presence" then |
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117 if type ~= "error" then |
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118 module:send(st.error_reply(stanza, "cancel", "bad-request")) |
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119 return |
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120 end |
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121 elseif stanza.name == "iq" then |
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122 if type == "get" or type == "set" then |
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123 if #sessions == 0 then |
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124 -- no sessions available to send to |
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125 module:log("debug", "no sessions to send to!") |
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126 module:send(st.error_reply(stanza, "cancel", "service-unavailable")) |
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127 return |
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128 end |
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129 |
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130 -- find a target session |
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131 local target_session = sessions:random() |
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132 local target = target_address .. "/" .. target_session |
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133 |
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134 -- encode sender JID in resource |
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135 local natted_from = module:get_host() .. "/" .. stanza.attr.from; |
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136 |
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137 module:log( |
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138 "debug", |
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139 "NAT-ed stanza: from: %s -> %s, to: %s -> %s", |
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140 stanza.attr.from, |
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141 natted_from, |
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142 stanza.attr.to, |
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143 target |
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144 ) |
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145 |
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146 stanza.attr.from = natted_from |
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147 stanza.attr.to = target |
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148 |
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149 module:send(stanza) |
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150 end |
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151 -- FIXME: handle and forward result/error correctly |
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152 elseif stanza.name == "message" then |
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153 -- not implemented yet, we need a way to ensure that routing doesn’t |
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154 -- break |
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155 module:send(st.error_reply(stanza, "cancel", "feature-not-implemented")) |
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156 end |
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157 end |
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158 |
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159 local function stanza_handler(event) |
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160 local origin, stanza = event.origin, event.stanza |
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161 module:log("debug", "received stanza from %s session", origin.type) |
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162 |
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163 local bare_from = jid_bare(stanza.attr.from); |
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164 local _, _, to = jid_split(stanza.attr.to); |
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165 if bare_from == target_address then |
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166 -- from our target, to whom? |
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167 if not to then |
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168 -- directly to component |
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169 if stanza.name == "presence" then |
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170 handle_target_presence(stanza) |
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171 else |
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172 module:send(st.error_reply(stanza, "cancel", "bad-request")) |
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173 return true |
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174 end |
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175 else |
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176 -- to someone else |
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177 handle_from_target(stanza) |
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178 end |
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179 else |
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180 handle_to_target(stanza) |
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181 end |
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182 return true |
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183 end |
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184 |
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185 module:hook("iq/bare", stanza_handler, -1); |
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186 module:hook("message/bare", stanza_handler, -1); |
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187 module:hook("presence/bare", stanza_handler, -1); |
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188 module:hook("iq/full", stanza_handler, -1); |
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189 module:hook("message/full", stanza_handler, -1); |
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190 module:hook("presence/full", stanza_handler, -1); |
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191 module:hook("iq/host", stanza_handler, -1); |
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192 module:hook("message/host", stanza_handler, -1); |
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193 module:hook("presence/host", stanza_handler, -1); |
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194 |
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195 module:log("debug", "loaded proxy on %s", module:get_host()) |
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196 |
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197 subscription_request = st.presence({ |
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198 type = "subscribe", |
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199 to = target_address, |
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200 from = module:get_host()} |
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201 ) |
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202 module:send(subscription_request) |