Tue, 04 Nov 2008 17:25:12 +0500
Internal component support
30 | 1 | |
2 | -- The code in this file should be self-explanatory, though the logic is horrible | |
3 | -- for more info on that, see doc/stanza_routing.txt, which attempts to condense | |
4 | -- the rules from the RFCs (mainly 3921) | |
5 | ||
6 | require "core.servermanager" | |
7 | ||
8 | local log = require "util.logger".init("stanzarouter") | |
9 | ||
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10 | local st = require "util.stanza"; |
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11 | local send_s2s = require "core.s2smanager".send_to_host; |
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12 | local user_exists = require "core.usermanager".user_exists; |
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13 | |
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14 | local rostermanager = require "core.rostermanager"; |
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15 | local sessionmanager = require "core.sessionmanager"; |
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16 | |
145 | 17 | local s2s_verify_dialback = require "core.s2smanager".verify_dialback; |
146 | 18 | local s2s_make_authenticated = require "core.s2smanager".make_authenticated; |
191 | 19 | |
20 | local modules_handle_stanza = require "core.modulemanager".handle_stanza; | |
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21 | local component_handle_stanza = require "core.componentmanager".handle_stanza; |
191 | 22 | |
145 | 23 | local format = string.format; |
24 | local tostring = tostring; | |
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25 | local t_concat = table.concat; |
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26 | local t_insert = table.insert; |
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27 | local tonumber = tonumber; |
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28 | local s_find = string.find; |
145 | 29 | |
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30 | local jid_split = require "util.jid".split; |
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31 | local print = print; |
30 | 32 | |
33 | function core_process_stanza(origin, stanza) | |
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34 | log("debug", "Received["..origin.type.."]: "..tostring(stanza)) |
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35 | |
73 | 36 | -- TODO verify validity of stanza (as well as JID validity) |
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37 | if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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38 | if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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39 | error("Invalid IQ"); |
148 | 40 | elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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41 | error("Invalid IQ"); |
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42 | end |
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43 | end |
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44 | |
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45 | if origin.type == "c2s" and not origin.full_jid |
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46 | and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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47 | and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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48 | error("Client MUST bind resource after auth"); |
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49 | end |
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50 | |
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51 | -- TODO also, stazas should be returned to their original state before the function ends |
145 | 52 | if origin.type == "c2s" then |
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53 | stanza.attr.from = origin.full_jid; |
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54 | end |
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55 | local to = stanza.attr.to; |
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56 | local node, host, resource = jid_split(to); |
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57 | local to_bare = node and (node.."@"..host) or host; -- bare JID |
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58 | local from = stanza.attr.from; |
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59 | local from_node, from_host, from_resource = jid_split(from); |
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60 | local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID |
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61 | |
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62 | if origin.type == "s2sin" then |
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63 | if origin.host ~= from_host then -- remote server trying to impersonate some other server? |
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64 | return; -- FIXME what should we do here? does this work with subdomains? |
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65 | end |
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66 | end |
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67 | if to and not(hosts[to]) and not(hosts[to_bare]) and (not(hosts[host]) or hosts[host].type ~= "local") then -- not for us? |
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68 | return; -- FIXME what should we do here? |
145 | 69 | end |
206 | 70 | |
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71 | -- FIXME do stanzas not of jabber:client get handled by components? |
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72 | if not to then |
170 | 73 | core_handle_stanza(origin, stanza); |
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74 | elseif hosts[to] and hosts[to].type == "local" then -- directed at a local server |
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75 | core_handle_stanza(origin, stanza); |
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76 | elseif hosts[to_bare] and hosts[to_bare].type == "component" then -- hack to allow components to handle node@server |
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77 | component_handle_stanza(origin, stanza); |
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78 | elseif hosts[to] and hosts[to].type == "component" then -- hack to allow components to handle node@server/resource and server/resource |
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79 | component_handle_stanza(origin, stanza); |
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80 | elseif hosts[host].type == "component" then -- directed at a component |
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81 | component_handle_stanza(origin, stanza); |
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82 | elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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83 | handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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84 | elseif stanza.name == "iq" and not resource then -- directed at bare JID |
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85 | core_handle_stanza(origin, stanza); |
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86 | elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then |
191 | 87 | modules_handle_stanza(origin, stanza); |
148 | 88 | elseif origin.type == "c2s" or origin.type == "s2sin" then |
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89 | core_route_stanza(origin, stanza); |
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90 | else |
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91 | log("warn", "stanza not processed"); |
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92 | end |
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93 | end |
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94 | |
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95 | -- This function handles stanzas which are not routed any further, |
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96 | -- that is, they are handled by this server |
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97 | function core_handle_stanza(origin, stanza) |
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98 | -- Handlers |
191 | 99 | if modules_handle_stanza(origin, stanza) then return; end |
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100 | if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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101 | local session = origin; |
206 | 102 | |
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103 | if stanza.name == "presence" and origin.roster then |
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104 | if stanza.attr.type == nil or stanza.attr.type == "unavailable" then |
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105 | for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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106 | local subscription = origin.roster[jid].subscription; |
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107 | if subscription == "both" or subscription == "from" then |
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108 | stanza.attr.to = jid; |
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109 | core_route_stanza(origin, stanza); |
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110 | end |
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111 | end |
151 | 112 | local node, host = jid_split(stanza.attr.from); |
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113 | for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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114 | if res ~= origin and res.full_jid then -- to resource. FIXME is res.full_jid the correct check? Maybe it should be res.presence |
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115 | stanza.attr.to = res.full_jid; |
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116 | core_route_stanza(origin, stanza); |
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117 | end |
151 | 118 | end |
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119 | if stanza.attr.type == nil and not origin.presence then -- initial presence |
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120 | local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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121 | for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to |
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122 | local subscription = origin.roster[jid].subscription; |
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123 | if subscription == "both" or subscription == "to" then |
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124 | probe.attr.to = jid; |
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125 | core_route_stanza(origin, probe); |
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126 | end |
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127 | end |
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128 | for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources |
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129 | if res ~= origin and res.presence then |
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130 | res.presence.attr.to = origin.full_jid; |
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131 | core_route_stanza(res, res.presence); |
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132 | res.presence.attr.to = nil; |
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133 | end |
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134 | end |
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135 | if origin.roster.pending then -- resend incoming subscription requests |
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136 | for jid in pairs(origin.roster.pending) do |
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137 | origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? |
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138 | end |
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139 | end |
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140 | local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); |
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141 | for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests |
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142 | if item.ask then |
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143 | request.attr.to = jid; |
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144 | core_route_stanza(origin, request); |
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145 | end |
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146 | end |
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147 | end |
199
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148 | origin.priority = 0; |
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149 | if stanza.attr.type == "unavailable" then |
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150 | origin.presence = nil; |
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151 | else |
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152 | origin.presence = stanza; |
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153 | local priority = stanza:child_with_name("priority"); |
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154 | if priority and #priority > 0 then |
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155 | priority = t_concat(priority); |
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156 | if s_find(priority, "^[+-]?[0-9]+$") then |
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157 | priority = tonumber(priority); |
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158 | if priority < -128 then priority = -128 end |
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159 | if priority > 127 then priority = 127 end |
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160 | origin.priority = priority; |
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161 | end |
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162 | end |
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163 | end |
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164 | stanza.attr.to = nil; -- reset it |
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165 | else |
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166 | -- TODO error, bad type |
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167 | end |
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168 | end -- TODO handle other stanzas |
145 | 169 | else |
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170 | log("warn", "Unhandled origin: %s", origin.type); -- FIXME reply with error |
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171 | end |
30 | 172 | end |
173 | ||
175
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174 | function send_presence_of_available_resources(user, host, jid, recipient_session) |
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175 | local h = hosts[host]; |
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176 | local count = 0; |
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177 | if h and h.type == "local" then |
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178 | local u = h.sessions[user]; |
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179 | if u then |
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180 | for k, session in pairs(u.sessions) do |
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181 | local pres = session.presence; |
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182 | if pres then |
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183 | pres.attr.to = jid; |
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184 | pres.attr.from = session.full_jid; |
186
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185 | recipient_session.send(pres); |
175
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186 | pres.attr.to = nil; |
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187 | pres.attr.from = nil; |
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188 | count = count + 1; |
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189 | end |
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190 | end |
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191 | end |
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192 | end |
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193 | return count; |
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194 | end |
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195 | |
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196 | function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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197 | local node, host = jid_split(from_bare); |
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198 | local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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199 | stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
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200 | if stanza.attr.type == "subscribe" then |
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201 | log("debug", "outbound subscribe from "..from_bare.." for "..to_bare); |
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202 | -- 1. route stanza |
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203 | -- 2. roster push (subscription = none, ask = subscribe) |
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204 | if rostermanager.set_contact_pending_out(node, host, to_bare) then |
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205 | rostermanager.roster_push(node, host, to_bare); |
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206 | end -- else file error |
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207 | core_route_stanza(origin, stanza); |
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208 | elseif stanza.attr.type == "unsubscribe" then |
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209 | log("debug", "outbound unsubscribe from "..from_bare.." for "..to_bare); |
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210 | -- 1. route stanza |
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211 | -- 2. roster push (subscription = none or from) |
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212 | if rostermanager.unsubscribe(node, host, to_bare) then |
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213 | rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? |
176
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214 | end -- else file error |
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215 | core_route_stanza(origin, stanza); |
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216 | elseif stanza.attr.type == "subscribed" then |
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217 | log("debug", "outbound subscribed from "..from_bare.." for "..to_bare); |
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218 | -- 1. route stanza |
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219 | -- 2. roster_push () |
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220 | -- 3. send_presence_of_available_resources |
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221 | if rostermanager.subscribed(node, host, to_bare) then |
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222 | rostermanager.roster_push(node, host, to_bare); |
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223 | core_route_stanza(origin, stanza); |
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224 | send_presence_of_available_resources(node, host, to_bare, origin); |
176
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225 | end |
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226 | elseif stanza.attr.type == "unsubscribed" then |
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227 | log("debug", "outbound unsubscribed from "..from_bare.." for "..to_bare); |
176
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228 | -- 1. route stanza |
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229 | -- 2. roster push (subscription = none or to) |
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230 | if rostermanager.unsubscribed(node, host, to_bare) then |
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231 | rostermanager.roster_push(node, host, to_bare); |
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232 | core_route_stanza(origin, stanza); |
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233 | end |
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234 | end |
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235 | stanza.attr.from, stanza.attr.to = st_from, st_to; |
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236 | end |
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237 | |
175
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238 | function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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239 | local node, host = jid_split(to_bare); |
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240 | local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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241 | stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
175
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242 | if stanza.attr.type == "probe" then |
200
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243 | log("debug", "inbound probe from "..from_bare.." for "..to_bare); |
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244 | if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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245 | if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then |
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246 | -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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247 | end |
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248 | else |
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249 | core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
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250 | end |
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251 | elseif stanza.attr.type == "subscribe" then |
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252 | log("debug", "inbound subscribe from "..from_bare.." for "..to_bare); |
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253 | if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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254 | core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
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255 | else |
177
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256 | if not rostermanager.is_contact_pending_in(node, host, from_bare) then |
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257 | if rostermanager.set_contact_pending_in(node, host, from_bare) then |
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258 | sessionmanager.send_to_available_resources(node, host, stanza); |
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259 | end -- TODO else return error, unable to save |
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260 | end |
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261 | end |
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262 | elseif stanza.attr.type == "unsubscribe" then |
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263 | log("debug", "inbound unsubscribe from "..from_bare.." for "..to_bare); |
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264 | if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
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265 | rostermanager.roster_push(node, host, from_bare); |
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266 | end |
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267 | elseif stanza.attr.type == "subscribed" then |
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268 | log("debug", "inbound subscribed from "..from_bare.." for "..to_bare); |
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269 | if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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270 | rostermanager.roster_push(node, host, from_bare); |
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271 | end |
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272 | elseif stanza.attr.type == "unsubscribed" then |
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273 | log("debug", "inbound unsubscribed from "..from_bare.." for "..to_bare); |
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274 | if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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275 | rostermanager.roster_push(node, host, from_bare); |
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276 | end |
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277 | end -- discard any other type |
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278 | stanza.attr.from, stanza.attr.to = st_from, st_to; |
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279 | end |
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280 | |
30 | 281 | function core_route_stanza(origin, stanza) |
282 | -- Hooks | |
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283 | --- ...later |
206 | 284 | |
30 | 285 | -- Deliver |
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286 | local to = stanza.attr.to; |
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287 | local node, host, resource = jid_split(to); |
170 | 288 | local to_bare = node and (node.."@"..host) or host; -- bare JID |
289 | local from = stanza.attr.from; | |
290 | local from_node, from_host, from_resource = jid_split(from); | |
291 | local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID | |
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292 | |
151 | 293 | if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end |
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294 | |
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295 | local host_session = hosts[host] |
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296 | if host_session and host_session.type == "local" then |
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297 | -- Local host |
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298 | local user = host_session.sessions[node]; |
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299 | if user then |
72 | 300 | local res = user.sessions[resource]; |
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301 | if not res then |
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302 | -- if we get here, resource was not specified or was unavailable |
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303 | if stanza.name == "presence" then |
151 | 304 | if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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305 | handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
151 | 306 | else -- sender is available or unavailable |
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307 | for _, session in pairs(user.sessions) do -- presence broadcast to all user resources. |
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308 | if session.full_jid then -- FIXME should this be just for available resources? Do we need to check subscription? |
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309 | stanza.attr.to = session.full_jid; -- reset at the end of function |
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310 | session.send(stanza); |
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311 | end |
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312 | end |
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313 | end |
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314 | elseif stanza.name == "message" then -- select a resource to recieve message |
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315 | local priority = 0; |
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316 | local recipients = {}; |
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317 | for _, session in pairs(user.sessions) do -- find resource with greatest priority |
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318 | local p = session.priority; |
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319 | if p > priority then |
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320 | priority = p; |
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321 | recipients = {session}; |
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322 | elseif p == priority then |
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323 | t_insert(recipients, session); |
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324 | end |
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325 | end |
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326 | for _, session in pairs(recipient) do |
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327 | session.send(stanza); |
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328 | end |
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329 | else |
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330 | -- TODO send IQ error |
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331 | end |
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332 | else |
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333 | -- User + resource is online... |
170 | 334 | stanza.attr.to = res.full_jid; -- reset at the end of function |
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335 | res.send(stanza); -- Yay \o/ |
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336 | end |
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337 | else |
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338 | -- user not online |
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339 | if user_exists(node, host) then |
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340 | if stanza.name == "presence" then |
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341 | if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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342 | handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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343 | else |
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344 | -- TODO send unavailable presence or unsubscribed |
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345 | end |
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346 | elseif stanza.name == "message" then |
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347 | -- TODO send message error, or store offline messages |
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348 | elseif stanza.name == "iq" then |
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349 | -- TODO send IQ error |
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350 | end |
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351 | else -- user does not exist |
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352 | -- TODO we would get here for nodeless JIDs too. Do something fun maybe? Echo service? Let plugins use xmpp:server/resource addresses? |
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353 | if stanza.name == "presence" then |
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354 | if stanza.attr.type == "probe" then |
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355 | origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"})); |
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356 | end |
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357 | -- else ignore |
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358 | else |
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359 | origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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360 | end |
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361 | end |
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362 | end |
148 | 363 | elseif origin.type == "c2s" then |
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364 | -- Remote host |
170 | 365 | local xmlns = stanza.attr.xmlns; |
148 | 366 | --stanza.attr.xmlns = "jabber:server"; |
367 | stanza.attr.xmlns = nil; | |
146 | 368 | log("debug", "sending s2s stanza: %s", tostring(stanza)); |
170 | 369 | send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors |
370 | stanza.attr.xmlns = xmlns; -- reset | |
148 | 371 | else |
372 | log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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373 | end |
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374 | stanza.attr.to = to; -- reset |
30 | 375 | end |
376 | ||
377 | function handle_stanza_toremote(stanza) | |
378 | log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
379 | end |