Software / code / prosody
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core/stanza_router.lua @ 119:b48a573608e8
Relocate presence broadcast to core_handle_stanza()
which is for processing stanzas that the server must handle (not route)
| author | Matthew Wild <mwild1@gmail.com> |
|---|---|
| date | Thu, 23 Oct 2008 03:52:51 +0100 |
| parent | 113:9026fdad1531 |
| child | 121:74e5919e4737 |
| rev | line source |
|---|---|
| 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 = require "core.sessionmanager".send_to_session; |
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12 local user_exists = require "core.usermanager".user_exists; |
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13 |
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14 local jid_split = require "util.jid".split; |
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15 local print = print; |
| 30 | 16 |
| 17 function core_process_stanza(origin, stanza) | |
| 66 | 18 log("debug", "Received: "..tostring(stanza)) |
| 73 | 19 -- TODO verify validity of stanza (as well as JID validity) |
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20 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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21 if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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22 error("Invalid IQ"); |
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23 elseif #stanza.tags > 1 or not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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24 error("Invalid IQ"); |
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25 end |
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26 end |
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27 |
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28 if origin.type == "c2s" and not origin.full_jid |
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29 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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30 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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31 error("Client MUST bind resource after auth"); |
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32 end |
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33 |
| 30 | 34 local to = stanza.attr.to; |
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35 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) |
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36 -- TODO also, stazas should be returned to their original state before the function ends |
| 30 | 37 |
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38 -- TODO presence subscriptions |
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39 if not to then |
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40 core_handle_stanza(origin, stanza); |
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41 elseif hosts[to] and hosts[to].type == "local" then |
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42 core_handle_stanza(origin, stanza); |
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43 elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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44 core_handle_stanza(origin, stanza); |
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45 elseif origin.type == "c2s" then |
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46 core_route_stanza(origin, stanza); |
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47 end |
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48 end |
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49 |
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50 function core_handle_stanza(origin, stanza) |
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51 -- Handlers |
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52 if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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53 local session = origin; |
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54 |
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55 if stanza.name == "presence" and origin.roster then |
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56 if stanza.attr.type == nil or stanza.attr.type == "available" or stanza.attr.type == "unavailable" then |
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57 for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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58 local subscription = origin.roster[jid].subscription; |
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59 if subscription == "both" or subscription == "from" then |
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60 stanza.attr.to = jid; |
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61 core_route_stanza(origin, stanza); |
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62 end |
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63 end |
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64 --[[local node, host = jid_split(stanza.attr.from); |
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65 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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66 if res.full_jid then |
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67 res = user.sessions[k]; |
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68 break; |
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69 end |
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70 end]] |
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71 if not origin.presence then -- presence probes on initial presence |
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72 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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73 for jid in pairs(origin.roster) do |
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74 local subscription = origin.roster[jid].subscription; |
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75 if subscription == "both" or subscription == "to" then |
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76 probe.attr.to = jid; |
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77 core_route_stanza(origin, probe); |
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78 end |
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79 end |
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80 end |
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81 origin.presence = stanza; |
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82 stanza.attr.to = nil; -- reset it |
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83 else |
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84 -- TODO error, bad type |
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85 end |
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86 else |
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87 log("debug", "Routing stanza to local"); |
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88 handle_stanza(session, stanza); |
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89 end |
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90 end |
| 30 | 91 end |
| 92 | |
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93 function is_authorized_to_see_presence(origin, username, host) |
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94 local roster = datamanager.load(username, host, "roster") or {}; |
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95 local item = roster[origin.username.."@"..origin.host]; |
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96 return item and (item.subscription == "both" or item.subscription == "from"); |
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97 end |
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98 |
| 30 | 99 function core_route_stanza(origin, stanza) |
| 100 -- Hooks | |
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101 --- ...later |
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102 |
| 30 | 103 -- Deliver |
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104 local to = stanza.attr.to; |
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105 local node, host, resource = jid_split(to); |
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106 |
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107 if stanza.name == "presence" and stanza.attr.type == "probe" then resource = nil; end |
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108 |
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109 local host_session = hosts[host] |
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110 if host_session and host_session.type == "local" then |
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111 -- Local host |
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112 local user = host_session.sessions[node]; |
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113 if user then |
| 72 | 114 local res = user.sessions[resource]; |
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115 if not res then |
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116 -- if we get here, resource was not specified or was unavailable |
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117 if stanza.name == "presence" then |
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118 if stanza.attr.type == "probe" then |
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119 if is_authorized_to_see_presence(origin, node, host) then |
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120 for k in pairs(user.sessions) do -- return presence for all resources |
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121 if user.sessions[k].presence then |
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122 local pres = user.sessions[k].presence; |
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123 pres.attr.to = origin.full_jid; |
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124 pres.attr.from = user.sessions[k].full_jid; |
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125 send(origin, pres); |
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126 pres.attr.to = nil; |
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127 pres.attr.from = nil; |
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128 end |
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129 end |
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130 else |
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131 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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132 end |
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133 else |
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134 for k in pairs(user.sessions) do -- presence broadcast to all user resources |
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135 if user.sessions[k].full_jid then |
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136 stanza.attr.to = user.sessions[k].full_jid; |
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137 send(user.sessions[k], stanza); |
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138 end |
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139 end |
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140 end |
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141 elseif stanza.name == "message" then -- select a resource to recieve message |
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142 for k in pairs(user.sessions) do |
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143 if user.sessions[k].full_jid then |
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144 res = user.sessions[k]; |
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145 break; |
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146 end |
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147 end |
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148 -- TODO find resource with greatest priority |
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149 send(res, stanza); |
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150 else |
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151 -- TODO send IQ error |
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152 end |
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153 else |
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154 stanza.attr.to = res.full_jid; |
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155 send(res, stanza); -- Yay \o/ |
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156 end |
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157 else |
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158 -- user not online |
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159 if user_exists(node, host) then |
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160 if stanza.name == "presence" then |
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161 if stanza.attr.type == "probe" and is_authorized_to_see_presence(origin, node, host) then -- FIXME what to do for not c2s? |
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162 -- TODO send last recieved unavailable presence |
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163 else |
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164 -- TODO send unavailable presence |
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165 end |
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166 elseif stanza.name == "message" then |
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167 -- TODO send message error, or store offline messages |
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168 elseif stanza.name == "iq" then |
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169 -- TODO send IQ error |
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170 end |
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171 else -- user does not exist |
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172 -- 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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173 if stanza.name == "presence" then |
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174 if stanza.attr.type == "probe" then |
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175 send(origin, st.presence({from = user.."@"..host, to = origin.username.."@"..origin.host, type = "unsubscribed"})); |
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176 end |
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177 -- else ignore |
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178 else |
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179 send(origin, st.error_reply(stanza, "cancel", "service-unavailable")); |
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180 end |
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181 end |
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182 end |
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183 else |
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184 -- Remote host |
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185 if host_session then |
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186 -- Send to session |
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187 else |
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188 -- Need to establish the connection |
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189 end |
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190 end |
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191 stanza.attr.to = to; -- reset |
| 30 | 192 end |
| 193 | |
| 194 function handle_stanza_nodest(stanza) | |
| 195 if stanza.name == "iq" then | |
| 196 handle_stanza_iq_no_to(session, stanza); | |
| 197 elseif stanza.name == "presence" then | |
| 198 -- Broadcast to this user's contacts | |
| 199 handle_stanza_presence_broadcast(session, stanza); | |
| 200 -- also, if it is initial presence, send out presence probes | |
| 201 if not session.last_presence then | |
| 202 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 203 end | |
| 204 session.last_presence = stanza; | |
| 205 elseif stanza.name == "message" then | |
| 206 -- Treat as if message was sent to bare JID of the sender | |
| 207 handle_stanza_to_local_user(stanza); | |
| 208 end | |
| 209 end | |
| 210 | |
| 211 function handle_stanza_tolocal(stanza) | |
| 212 local node, host, resource = jid.split(stanza.attr.to); | |
| 213 if host and hosts[host] and hosts[host].type == "local" then | |
| 214 -- Is a local host, handle internally | |
| 215 if node then | |
| 216 -- Is a local user, send to their session | |
| 217 log("debug", "Routing stanza to %s@%s", node, host); | |
| 218 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 219 handle_stanza_to_local_user(stanza); | |
| 220 else | |
| 221 -- Is sent to this server, let's handle it... | |
| 222 log("debug", "Routing stanza to %s", host); | |
| 223 handle_stanza_to_server(stanza, session); | |
| 224 end | |
| 225 end | |
| 226 end | |
| 227 | |
| 228 function handle_stanza_toremote(stanza) | |
| 229 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 230 end | |
| 231 | |
| 232 | |
| 233 --[[ | |
| 234 local function route_c2s_stanza(session, stanza) | |
| 235 stanza.attr.from = session.full_jid; | |
| 236 if not stanza.attr.to and session.username then | |
| 237 -- Has no 'to' attribute, handle internally | |
| 238 if stanza.name == "iq" then | |
| 239 handle_stanza_iq_no_to(session, stanza); | |
| 240 elseif stanza.name == "presence" then | |
| 241 -- Broadcast to this user's contacts | |
| 242 handle_stanza_presence_broadcast(session, stanza); | |
| 243 -- also, if it is initial presence, send out presence probes | |
| 244 if not session.last_presence then | |
| 245 handle_stanza_presence_probe_broadcast(session, stanza); | |
| 246 end | |
| 247 session.last_presence = stanza; | |
| 248 elseif stanza.name == "message" then | |
| 249 -- Treat as if message was sent to bare JID of the sender | |
| 250 handle_stanza_to_local_user(stanza); | |
| 251 end | |
| 252 end | |
| 253 local node, host, resource = jid.split(stanza.attr.to); | |
| 254 if host and hosts[host] and hosts[host].type == "local" then | |
| 255 -- Is a local host, handle internally | |
| 256 if node then | |
| 257 -- Is a local user, send to their session | |
| 258 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what? | |
| 259 handle_stanza_to_local_user(stanza); | |
| 260 else | |
| 261 -- Is sent to this server, let's handle it... | |
| 262 handle_stanza_to_server(stanza, session); | |
| 263 end | |
| 264 else | |
| 265 -- Is not for us or a local user, route accordingly | |
| 266 route_s2s_stanza(stanza); | |
| 267 end | |
| 268 end | |
| 269 | |
| 270 function handle_stanza_no_to(session, stanza) | |
| 271 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end | |
| 272 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns); | |
| 273 if stanza.attr.type == "get" or stanza.attr.type == "set" then | |
| 274 if iq_handlers[xmlns] then | |
| 275 if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it | |
| 276 end | |
| 277 -- Oh, handler didn't handle it. Need to send service-unavailable now. | |
| 278 log("warn", "Unhandled namespace: "..xmlns); | |
| 279 session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id)); | |
| 280 return; -- All done! | |
| 281 end | |
| 282 end | |
| 283 | |
| 284 function handle_stanza_to_local_user(stanza) | |
| 285 if stanza.name == "message" then | |
| 286 handle_stanza_message_to_local_user(stanza); | |
| 287 elseif stanza.name == "presence" then | |
| 288 handle_stanza_presence_to_local_user(stanza); | |
| 289 elseif stanza.name == "iq" then | |
| 290 handle_stanza_iq_to_local_user(stanza); | |
| 291 end | |
| 292 end | |
| 293 | |
| 294 function handle_stanza_message_to_local_user(stanza) | |
| 295 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 296 local destuser = hosts[host].sessions[node]; | |
| 297 if destuser then | |
| 298 if resource and destuser[resource] then | |
| 299 destuser[resource]:send(stanza); | |
| 300 else | |
| 301 -- Bare JID, or resource offline | |
| 302 local best_session; | |
| 303 for resource, session in pairs(destuser.sessions) do | |
| 304 if not best_session then best_session = session; | |
| 305 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 306 best_session = session; | |
| 307 end | |
| 308 end | |
| 309 if not best_session then | |
| 310 offlinemessage.new(node, host, stanza); | |
| 311 else | |
| 312 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 313 destuser[best_session]:send(stanza); | |
| 314 end | |
| 315 end | |
| 316 else | |
| 317 -- User is offline | |
| 318 offlinemessage.new(node, host, stanza); | |
| 319 end | |
| 320 end | |
| 321 | |
| 322 function handle_stanza_presence_to_local_user(stanza) | |
| 323 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 324 local destuser = hosts[host].sessions[node]; | |
| 325 if destuser then | |
| 326 if resource then | |
| 327 if destuser[resource] then | |
| 328 destuser[resource]:send(stanza); | |
| 329 else | |
| 330 return; | |
| 331 end | |
| 332 else | |
| 333 -- Broadcast to all user's resources | |
| 334 for resource, session in pairs(destuser.sessions) do | |
| 335 session:send(stanza); | |
| 336 end | |
| 337 end | |
| 338 end | |
| 339 end | |
| 340 | |
| 341 function handle_stanza_iq_to_local_user(stanza) | |
| 342 | |
| 343 end | |
| 344 | |
| 345 function foo() | |
| 346 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource; | |
| 347 local destuser = hosts[host].sessions[node]; | |
| 348 if destuser and destuser.sessions then | |
| 349 -- User online | |
| 350 if resource and destuser.sessions[resource] then | |
| 351 stanza.to:send(stanza); | |
| 352 else | |
| 353 --User is online, but specified resource isn't (or no resource specified) | |
| 354 local best_session; | |
| 355 for resource, session in pairs(destuser.sessions) do | |
| 356 if not best_session then best_session = session; | |
| 357 elseif session.priority >= best_session.priority and session.priority >= 0 then | |
| 358 best_session = session; | |
| 359 end | |
| 360 end | |
| 361 if not best_session then | |
| 362 offlinemessage.new(node, host, stanza); | |
| 363 else | |
| 364 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); | |
| 365 resource = best_session.resource; | |
| 366 end | |
| 367 end | |
| 368 if destuser.sessions[resource] == session then | |
| 369 log("warn", "core", "Attempt to send stanza to self, dropping..."); | |
| 370 else | |
| 371 print("...sending...", tostring(stanza)); | |
| 372 --destuser.sessions[resource].conn.write(tostring(data)); | |
| 373 print(" to conn ", destuser.sessions[resource].conn); | |
| 374 destuser.sessions[resource].conn.write(tostring(stanza)); | |
| 375 print("...sent") | |
| 376 end | |
| 377 elseif stanza.name == "message" then | |
| 378 print(" ...will be stored offline"); | |
| 379 offlinemessage.new(node, host, stanza); | |
| 380 elseif stanza.name == "iq" then | |
| 381 print(" ...is an iq"); | |
| 382 stanza.from:send(st.reply(stanza) | |
| 383 :tag("error", { type = "cancel" }) | |
| 384 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); | |
| 385 end | |
| 386 end | |
| 387 | |
| 388 -- Broadcast a presence stanza to all of a user's contacts | |
| 389 function handle_stanza_presence_broadcast(session, stanza) | |
| 390 if session.roster then | |
| 391 local initial_presence = not session.last_presence; | |
| 392 session.last_presence = stanza; | |
| 393 | |
| 394 -- Broadcast presence and probes | |
| 395 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type }); | |
| 396 | |
| 397 for child in stanza:childtags() do | |
| 398 broadcast:add_child(child); | |
| 399 end | |
| 400 for contact_jid in pairs(session.roster) do | |
| 401 broadcast.attr.to = contact_jid; | |
| 402 send_to(contact_jid, broadcast); | |
| 403 if initial_presence then | |
| 404 local node, host = jid.split(contact_jid); | |
| 405 if hosts[host] and hosts[host].type == "local" then | |
| 406 local contact = hosts[host].sessions[node] | |
| 407 if contact then | |
| 408 local pres = st.presence { to = session.full_jid }; | |
| 409 for resource, contact_session in pairs(contact.sessions) do | |
| 410 if contact_session.last_presence then | |
| 411 pres.tags = contact_session.last_presence.tags; | |
| 412 pres.attr.from = contact_session.full_jid; | |
| 413 send(pres); | |
| 414 end | |
| 415 end | |
| 416 end | |
| 417 --FIXME: Do we send unavailable if they are offline? | |
| 418 else | |
| 419 probe.attr.to = contact; | |
| 420 send_to(contact, probe); | |
| 421 end | |
| 422 end | |
| 423 end | |
| 424 | |
| 425 -- Probe for our contacts' presence | |
| 426 end | |
| 427 end | |
| 428 | |
| 429 -- Broadcast presence probes to all of a user's contacts | |
| 430 function handle_stanza_presence_probe_broadcast(session, stanza) | |
| 431 end | |
| 432 | |
| 433 -- | |
| 434 function handle_stanza_to_server(stanza) | |
| 435 end | |
| 436 | |
| 437 function handle_stanza_iq_no_to(session, stanza) | |
| 438 end | |
| 439 ]] |
