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30
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1
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2 -- The code in this file should be self-explanatory, though the logic is horrible
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3 -- for more info on that, see doc/stanza_routing.txt, which attempts to condense
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4 -- the rules from the RFCs (mainly 3921)
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5
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6 require "core.servermanager"
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7
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8 local log = require "util.logger".init("stanzarouter")
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9
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10 require "util.jid"
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11 local jid_split = jid.split;
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12
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13 function core_process_stanza(origin, stanza)
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14 local to = stanza.attr.to;
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15
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16 if not to or (hosts[to] and hosts[to].type == "local") then
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17 core_handle_stanza(origin, stanza);
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18 elseif origin.type == "c2s" then
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19 core_route_stanza(origin, stanza);
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20 end
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21
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22 end
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23
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24 function core_handle_stanza(origin, stanza)
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25 -- Handlers
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26 if origin.type == "c2s" or origin.type == "c2s_unauthed" then
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27 local session = origin;
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28 stanza.attr.from = session.full_jid;
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29
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30 log("debug", "Routing stanza");
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31 -- Stanza has no to attribute
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32 --local to_node, to_host, to_resource = jid_split(stanza.attr.to);
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33 --if not to_host then error("Invalid destination JID: "..string.format("{ %q, %q, %q } == %q", to_node or "", to_host or "", to_resource or "", stanza.attr.to or "nil")); end
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34
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35 -- Stanza is to this server, or a user on this server
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36 log("debug", "Routing stanza to local");
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37 handle_stanza(session, stanza);
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38 end
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39 end
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40
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41 function core_route_stanza(origin, stanza)
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42 -- Hooks
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43 -- Deliver
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44 end
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45
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46 function handle_stanza_nodest(stanza)
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47 if stanza.name == "iq" then
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48 handle_stanza_iq_no_to(session, stanza);
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49 elseif stanza.name == "presence" then
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50 -- Broadcast to this user's contacts
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51 handle_stanza_presence_broadcast(session, stanza);
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52 -- also, if it is initial presence, send out presence probes
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53 if not session.last_presence then
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54 handle_stanza_presence_probe_broadcast(session, stanza);
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55 end
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56 session.last_presence = stanza;
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57 elseif stanza.name == "message" then
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58 -- Treat as if message was sent to bare JID of the sender
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59 handle_stanza_to_local_user(stanza);
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60 end
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61 end
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62
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63 function handle_stanza_tolocal(stanza)
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64 local node, host, resource = jid.split(stanza.attr.to);
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65 if host and hosts[host] and hosts[host].type == "local" then
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66 -- Is a local host, handle internally
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67 if node then
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68 -- Is a local user, send to their session
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69 log("debug", "Routing stanza to %s@%s", node, host);
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70 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
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71 handle_stanza_to_local_user(stanza);
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72 else
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73 -- Is sent to this server, let's handle it...
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74 log("debug", "Routing stanza to %s", host);
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75 handle_stanza_to_server(stanza, session);
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76 end
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77 end
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78 end
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79
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80 function handle_stanza_toremote(stanza)
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81 log("error", "Stanza bound for remote host, but s2s is not implemented");
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82 end
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83
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84
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85 --[[
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86 local function route_c2s_stanza(session, stanza)
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87 stanza.attr.from = session.full_jid;
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88 if not stanza.attr.to and session.username then
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89 -- Has no 'to' attribute, handle internally
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90 if stanza.name == "iq" then
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91 handle_stanza_iq_no_to(session, stanza);
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92 elseif stanza.name == "presence" then
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93 -- Broadcast to this user's contacts
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94 handle_stanza_presence_broadcast(session, stanza);
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95 -- also, if it is initial presence, send out presence probes
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96 if not session.last_presence then
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97 handle_stanza_presence_probe_broadcast(session, stanza);
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98 end
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99 session.last_presence = stanza;
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100 elseif stanza.name == "message" then
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101 -- Treat as if message was sent to bare JID of the sender
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102 handle_stanza_to_local_user(stanza);
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103 end
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104 end
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105 local node, host, resource = jid.split(stanza.attr.to);
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106 if host and hosts[host] and hosts[host].type == "local" then
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107 -- Is a local host, handle internally
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108 if node then
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109 -- Is a local user, send to their session
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110 if not session.username then return; end --FIXME: Correct response when trying to use unauthed stream is what?
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111 handle_stanza_to_local_user(stanza);
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112 else
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113 -- Is sent to this server, let's handle it...
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114 handle_stanza_to_server(stanza, session);
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115 end
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116 else
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117 -- Is not for us or a local user, route accordingly
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118 route_s2s_stanza(stanza);
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119 end
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120 end
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121
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122 function handle_stanza_no_to(session, stanza)
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123 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end
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124 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns);
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125 if stanza.attr.type == "get" or stanza.attr.type == "set" then
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126 if iq_handlers[xmlns] then
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127 if iq_handlers[xmlns](stanza) then return; end; -- If handler returns true, it handled it
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128 end
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129 -- Oh, handler didn't handle it. Need to send service-unavailable now.
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130 log("warn", "Unhandled namespace: "..xmlns);
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131 session:send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id));
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132 return; -- All done!
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133 end
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134 end
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135
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136 function handle_stanza_to_local_user(stanza)
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137 if stanza.name == "message" then
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138 handle_stanza_message_to_local_user(stanza);
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139 elseif stanza.name == "presence" then
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140 handle_stanza_presence_to_local_user(stanza);
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141 elseif stanza.name == "iq" then
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142 handle_stanza_iq_to_local_user(stanza);
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143 end
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144 end
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145
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146 function handle_stanza_message_to_local_user(stanza)
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147 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
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148 local destuser = hosts[host].sessions[node];
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149 if destuser then
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150 if resource and destuser[resource] then
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151 destuser[resource]:send(stanza);
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152 else
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153 -- Bare JID, or resource offline
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154 local best_session;
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155 for resource, session in pairs(destuser.sessions) do
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156 if not best_session then best_session = session;
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157 elseif session.priority >= best_session.priority and session.priority >= 0 then
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158 best_session = session;
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159 end
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160 end
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161 if not best_session then
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162 offlinemessage.new(node, host, stanza);
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163 else
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164 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
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165 destuser[best_session]:send(stanza);
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166 end
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167 end
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168 else
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169 -- User is offline
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170 offlinemessage.new(node, host, stanza);
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171 end
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172 end
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173
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174 function handle_stanza_presence_to_local_user(stanza)
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175 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
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176 local destuser = hosts[host].sessions[node];
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177 if destuser then
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178 if resource then
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179 if destuser[resource] then
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180 destuser[resource]:send(stanza);
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181 else
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182 return;
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183 end
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184 else
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185 -- Broadcast to all user's resources
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186 for resource, session in pairs(destuser.sessions) do
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187 session:send(stanza);
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188 end
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189 end
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190 end
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191 end
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192
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193 function handle_stanza_iq_to_local_user(stanza)
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194
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195 end
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196
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197 function foo()
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198 local node, host, resource = stanza.to.node, stanza.to.host, stanza.to.resource;
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199 local destuser = hosts[host].sessions[node];
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200 if destuser and destuser.sessions then
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201 -- User online
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202 if resource and destuser.sessions[resource] then
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203 stanza.to:send(stanza);
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204 else
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205 --User is online, but specified resource isn't (or no resource specified)
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206 local best_session;
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207 for resource, session in pairs(destuser.sessions) do
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208 if not best_session then best_session = session;
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209 elseif session.priority >= best_session.priority and session.priority >= 0 then
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210 best_session = session;
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211 end
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212 end
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213 if not best_session then
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214 offlinemessage.new(node, host, stanza);
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215 else
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216 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'");
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217 resource = best_session.resource;
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218 end
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219 end
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220 if destuser.sessions[resource] == session then
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221 log("warn", "core", "Attempt to send stanza to self, dropping...");
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222 else
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223 print("...sending...", tostring(stanza));
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224 --destuser.sessions[resource].conn.write(tostring(data));
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225 print(" to conn ", destuser.sessions[resource].conn);
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226 destuser.sessions[resource].conn.write(tostring(stanza));
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227 print("...sent")
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228 end
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229 elseif stanza.name == "message" then
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230 print(" ...will be stored offline");
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231 offlinemessage.new(node, host, stanza);
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232 elseif stanza.name == "iq" then
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233 print(" ...is an iq");
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234 stanza.from:send(st.reply(stanza)
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235 :tag("error", { type = "cancel" })
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236 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" }));
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237 end
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238 end
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239
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240 -- Broadcast a presence stanza to all of a user's contacts
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241 function handle_stanza_presence_broadcast(session, stanza)
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242 if session.roster then
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243 local initial_presence = not session.last_presence;
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244 session.last_presence = stanza;
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245
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246 -- Broadcast presence and probes
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247 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type });
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248
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249 for child in stanza:childtags() do
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250 broadcast:add_child(child);
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251 end
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252 for contact_jid in pairs(session.roster) do
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253 broadcast.attr.to = contact_jid;
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254 send_to(contact_jid, broadcast);
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255 if initial_presence then
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256 local node, host = jid.split(contact_jid);
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257 if hosts[host] and hosts[host].type == "local" then
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258 local contact = hosts[host].sessions[node]
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259 if contact then
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260 local pres = st.presence { to = session.full_jid };
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261 for resource, contact_session in pairs(contact.sessions) do
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262 if contact_session.last_presence then
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263 pres.tags = contact_session.last_presence.tags;
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264 pres.attr.from = contact_session.full_jid;
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265 send(pres);
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266 end
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267 end
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268 end
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269 --FIXME: Do we send unavailable if they are offline?
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270 else
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271 probe.attr.to = contact;
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272 send_to(contact, probe);
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273 end
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274 end
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275 end
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276
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277 -- Probe for our contacts' presence
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278 end
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279 end
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280
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281 -- Broadcast presence probes to all of a user's contacts
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282 function handle_stanza_presence_probe_broadcast(session, stanza)
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283 end
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284
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285 --
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286 function handle_stanza_to_server(stanza)
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287 end
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288
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289 function handle_stanza_iq_no_to(session, stanza)
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290 end
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291 ]] |
