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core/stanza_router.lua @ 199:eccf66b42bd7
Added resource priority handling, etc
| author | Waqas Hussain <waqas20@gmail.com> |
|---|---|
| date | Sun, 02 Nov 2008 06:36:42 +0500 |
| parent | 192:71c389c6fc2e |
| child | 200:5e8b3cce798f |
| 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_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; | |
| 21 | |
| 145 | 22 local format = string.format; |
| 23 local tostring = tostring; | |
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24 local t_concat = table.concat; |
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25 local tonumber = tonumber; |
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26 local s_find = string.find; |
| 145 | 27 |
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28 local jid_split = require "util.jid".split; |
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29 local print = print; |
| 30 | 30 |
| 31 function core_process_stanza(origin, stanza) | |
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32 log("debug", "Received["..origin.type.."]: "..tostring(stanza)) |
| 73 | 33 -- TODO verify validity of stanza (as well as JID validity) |
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34 if stanza.name == "iq" and not(#stanza.tags == 1 and stanza.tags[1].attr.xmlns) then |
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35 if stanza.attr.type == "set" or stanza.attr.type == "get" then |
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36 error("Invalid IQ"); |
| 148 | 37 elseif #stanza.tags > 1 and not(stanza.attr.type == "error" or stanza.attr.type == "result") then |
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38 error("Invalid IQ"); |
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39 end |
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40 end |
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41 |
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42 if origin.type == "c2s" and not origin.full_jid |
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43 and not(stanza.name == "iq" and stanza.tags[1].name == "bind" |
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44 and stanza.tags[1].attr.xmlns == "urn:ietf:params:xml:ns:xmpp-bind") then |
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45 error("Client MUST bind resource after auth"); |
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46 end |
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47 |
| 30 | 48 local to = stanza.attr.to; |
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49 -- TODO also, stazas should be returned to their original state before the function ends |
| 145 | 50 if origin.type == "c2s" then |
| 51 stanza.attr.from = origin.full_jid; -- quick fix to prevent impersonation (FIXME this would be incorrect when the origin is not c2s) | |
| 52 end | |
| 30 | 53 |
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54 if not to then |
| 170 | 55 core_handle_stanza(origin, stanza); |
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56 elseif origin.type == "c2s" and stanza.name == "presence" and stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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57 local node, host = jid_split(stanza.attr.to); |
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58 local to_bare = node and (node.."@"..host) or host; -- bare JID |
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59 local from_node, from_host = jid_split(stanza.attr.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 handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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62 elseif hosts[to] and hosts[to].type == "local" then |
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63 core_handle_stanza(origin, stanza); |
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64 elseif stanza.name == "iq" and not select(3, jid_split(to)) then |
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65 core_handle_stanza(origin, stanza); |
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66 elseif stanza.attr.xmlns and stanza.attr.xmlns ~= "jabber:client" and stanza.attr.xmlns ~= "jabber:server" then |
| 191 | 67 modules_handle_stanza(origin, stanza); |
| 148 | 68 elseif origin.type == "c2s" or origin.type == "s2sin" then |
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69 core_route_stanza(origin, stanza); |
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70 end |
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71 end |
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72 |
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73 -- This function handles stanzas which are not routed any further, |
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74 -- that is, they are handled by this server |
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75 function core_handle_stanza(origin, stanza) |
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76 -- Handlers |
| 191 | 77 if modules_handle_stanza(origin, stanza) then return; end |
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78 if origin.type == "c2s" or origin.type == "c2s_unauthed" then |
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79 local session = origin; |
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80 |
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81 if stanza.name == "presence" and origin.roster then |
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82 if stanza.attr.type == nil or stanza.attr.type == "unavailable" then |
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83 for jid in pairs(origin.roster) do -- broadcast to all interested contacts |
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84 local subscription = origin.roster[jid].subscription; |
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85 if subscription == "both" or subscription == "from" then |
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86 stanza.attr.to = jid; |
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87 core_route_stanza(origin, stanza); |
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88 end |
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89 end |
| 151 | 90 local node, host = jid_split(stanza.attr.from); |
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91 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast to all resources |
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92 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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93 stanza.attr.to = res.full_jid; |
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94 core_route_stanza(origin, stanza); |
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95 end |
| 151 | 96 end |
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97 if stanza.attr.type == nil and not origin.presence then -- initial presence |
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98 local probe = st.presence({from = origin.full_jid, type = "probe"}); |
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99 for jid in pairs(origin.roster) do -- probe all contacts we are subscribed to |
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100 local subscription = origin.roster[jid].subscription; |
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101 if subscription == "both" or subscription == "to" then |
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102 probe.attr.to = jid; |
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103 core_route_stanza(origin, probe); |
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104 end |
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105 end |
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106 for _, res in pairs(hosts[host].sessions[node].sessions) do -- broadcast from all available resources |
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107 if res ~= origin and res.presence then |
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108 res.presence.attr.to = origin.full_jid; |
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109 core_route_stanza(res, res.presence); |
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110 res.presence.attr.to = nil; |
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111 end |
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112 end |
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113 if origin.roster.pending then -- resend incoming subscription requests |
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114 for jid in pairs(origin.roster.pending) do |
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115 origin.send(st.presence({type="subscribe", from=jid})); -- TODO add to attribute? Use original? |
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116 end |
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117 end |
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118 local request = st.presence({type="subscribe", from=origin.username.."@"..origin.host}); |
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119 for jid, item in pairs(origin.roster) do -- resend outgoing subscription requests |
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120 if item.ask then |
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121 request.attr.to = jid; |
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122 core_route_stanza(origin, request); |
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123 end |
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124 end |
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125 end |
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126 origin.priority = 0; |
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127 if stanza.attr.type == "unavailable" then |
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128 origin.presence = nil; |
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129 else |
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130 origin.presence = stanza; |
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131 local priority = stanza:child_with_name("priority"); |
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132 if priority and #priority > 0 then |
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133 priority = t_concat(priority); |
|
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134 if s_find(priority, "^[+-]?[0-9]+$") then |
|
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135 priority = tonumber(priority); |
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|
136 if priority < -128 then priority = -128 end |
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192
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137 if priority > 127 then priority = 127 end |
|
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192
diff
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|
138 origin.priority = priority; |
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192
diff
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|
139 end |
|
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192
diff
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|
140 end |
|
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192
diff
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|
141 end |
|
113
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|
142 stanza.attr.to = nil; -- reset it |
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|
143 else |
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|
144 -- TODO error, bad type |
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|
145 end |
| 146 | 146 end |
| 145 | 147 else |
| 148 log("warn", "Unhandled origin: %s", origin.type); | |
|
71
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Added: Local stanza routing
Waqas Hussain <waqas20@gmail.com>
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68
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|
149 end |
| 30 | 150 end |
| 151 | |
|
175
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152 function send_presence_of_available_resources(user, host, jid, recipient_session) |
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174
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153 local h = hosts[host]; |
|
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154 local count = 0; |
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155 if h and h.type == "local" then |
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156 local u = h.sessions[user]; |
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157 if u then |
|
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158 for k, session in pairs(u.sessions) do |
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159 local pres = session.presence; |
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|
160 if pres then |
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161 pres.attr.to = jid; |
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162 pres.attr.from = session.full_jid; |
|
186
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sends2s -> s2s_session.send(), s2s_session.send() -> s2s_session.sends2s()
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178
diff
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|
163 recipient_session.send(pres); |
|
175
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164 pres.attr.to = nil; |
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165 pres.attr.from = nil; |
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166 count = count + 1; |
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|
167 end |
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168 end |
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169 end |
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170 end |
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|
171 return count; |
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|
172 end |
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173 |
|
177
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174 function handle_outbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
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175 local node, host = jid_split(from_bare); |
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176 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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177 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
|
176
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178 if stanza.attr.type == "subscribe" then |
|
177
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179 log("debug", "outbound subscribe from "..from_bare.." for "..to_bare); |
|
176
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180 -- 1. route stanza |
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181 -- 2. roster push (subscription = none, ask = subscribe) |
|
177
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182 if rostermanager.set_contact_pending_out(node, host, to_bare) then |
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183 rostermanager.roster_push(node, host, to_bare); |
|
176
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184 end -- else file error |
|
177
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185 core_route_stanza(origin, stanza); |
|
176
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186 elseif stanza.attr.type == "unsubscribe" then |
|
177
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187 log("debug", "outbound unsubscribe from "..from_bare.." for "..to_bare); |
|
176
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188 -- 1. route stanza |
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189 -- 2. roster push (subscription = none or from) |
|
177
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190 if rostermanager.unsubscribe(node, host, to_bare) then |
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191 rostermanager.roster_push(node, host, to_bare); -- FIXME do roster push when roster has in fact not changed? |
|
176
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192 end -- else file error |
|
177
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|
193 core_route_stanza(origin, stanza); |
|
176
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194 elseif stanza.attr.type == "subscribed" then |
|
177
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|
195 log("debug", "outbound subscribed from "..from_bare.." for "..to_bare); |
|
176
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|
196 -- 1. route stanza |
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175
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|
197 -- 2. roster_push () |
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198 -- 3. send_presence_of_available_resources |
|
177
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199 if rostermanager.subscribed(node, host, to_bare) then |
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200 rostermanager.roster_push(node, host, to_bare); |
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201 core_route_stanza(origin, stanza); |
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202 send_presence_of_available_resources(node, host, to_bare, origin); |
|
176
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|
203 end |
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204 elseif stanza.attr.type == "unsubscribed" then |
|
177
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|
205 log("debug", "outbound unsubscribed from "..from_bare.." for "..to_bare); |
|
176
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175
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206 -- 1. route stanza |
|
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175
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|
207 -- 2. roster push (subscription = none or to) |
|
177
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208 if rostermanager.unsubscribed(node, host, to_bare) then |
|
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|
209 rostermanager.roster_push(node, host, to_bare); |
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|
210 core_route_stanza(origin, stanza); |
|
176
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211 end |
|
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212 end |
|
177
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|
213 stanza.attr.from, stanza.attr.to = st_from, st_to; |
|
176
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175
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|
214 end |
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|
215 |
|
175
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|
216 function handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare) |
|
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217 local node, host = jid_split(to_bare); |
|
177
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218 local st_from, st_to = stanza.attr.from, stanza.attr.to; |
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219 stanza.attr.from, stanza.attr.to = from_bare, to_bare; |
|
175
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220 if stanza.attr.type == "probe" then |
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221 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
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222 if 0 == send_presence_of_available_resources(node, host, from_bare, origin) then |
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223 -- TODO send last recieved unavailable presence (or we MAY do nothing, which is fine too) |
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224 end |
|
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225 else |
|
177
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226 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="unsubscribed"})); |
|
175
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227 end |
|
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228 elseif stanza.attr.type == "subscribe" then |
|
177
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229 log("debug", "inbound subscribe from "..from_bare.." for "..to_bare); |
|
175
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230 if rostermanager.is_contact_subscribed(node, host, from_bare) then |
|
177
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231 core_route_stanza(origin, st.presence({from=to_bare, to=from_bare, type="subscribed"})); -- already subscribed |
|
175
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|
232 else |
|
177
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|
233 if not rostermanager.is_contact_pending_in(node, host, from_bare) then |
|
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234 if rostermanager.set_contact_pending_in(node, host, from_bare) then |
|
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|
235 sessionmanager.send_to_available_resources(node, host, stanza); |
|
176
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236 end -- TODO else return error, unable to save |
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|
237 end |
|
175
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|
238 end |
|
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|
239 elseif stanza.attr.type == "unsubscribe" then |
|
177
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|
240 log("debug", "inbound unsubscribe from "..from_bare.." for "..to_bare); |
|
175
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|
241 if rostermanager.process_inbound_unsubscribe(node, host, from_bare) then |
|
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|
242 rostermanager.roster_push(node, host, from_bare); |
|
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|
243 end |
|
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|
244 elseif stanza.attr.type == "subscribed" then |
|
177
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|
245 log("debug", "inbound subscribed from "..from_bare.." for "..to_bare); |
|
175
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|
246 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
|
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|
247 rostermanager.roster_push(node, host, from_bare); |
|
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|
248 end |
|
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|
249 elseif stanza.attr.type == "unsubscribed" then |
|
177
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|
250 log("debug", "inbound unsubscribed from "..from_bare.." for "..to_bare); |
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175
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251 if rostermanager.process_inbound_subscription_approval(node, host, from_bare) then |
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252 rostermanager.roster_push(node, host, from_bare); |
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253 end |
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254 end -- discard any other type |
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255 stanza.attr.from, stanza.attr.to = st_from, st_to; |
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256 end |
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257 |
| 30 | 258 function core_route_stanza(origin, stanza) |
| 259 -- Hooks | |
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260 --- ...later |
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261 |
| 30 | 262 -- Deliver |
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263 local to = stanza.attr.to; |
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264 local node, host, resource = jid_split(to); |
| 170 | 265 local to_bare = node and (node.."@"..host) or host; -- bare JID |
| 266 local from = stanza.attr.from; | |
| 267 local from_node, from_host, from_resource = jid_split(from); | |
| 268 local from_bare = from_node and (from_node.."@"..from_host) or from_host; -- bare JID | |
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269 |
| 151 | 270 if stanza.name == "presence" and (stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable") then resource = nil; end |
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271 |
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272 local host_session = hosts[host] |
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273 if host_session and host_session.type == "local" then |
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274 -- Local host |
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275 local user = host_session.sessions[node]; |
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276 if user then |
| 72 | 277 local res = user.sessions[resource]; |
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278 if not res then |
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279 -- if we get here, resource was not specified or was unavailable |
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280 if stanza.name == "presence" then |
| 151 | 281 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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282 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
| 151 | 283 else -- sender is available or unavailable |
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284 for k in pairs(user.sessions) do -- presence broadcast to all user resources. FIXME should this be just for available resources? Do we need to check subscription? |
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285 if user.sessions[k].full_jid then |
| 170 | 286 stanza.attr.to = user.sessions[k].full_jid; -- reset at the end of function |
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287 user.sessions[k].send(stanza); |
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288 end |
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289 end |
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290 end |
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291 elseif stanza.name == "message" then -- select a resource to recieve message |
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292 for k in pairs(user.sessions) do |
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293 if user.sessions[k].full_jid then |
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294 res = user.sessions[k]; |
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295 break; |
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296 end |
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297 end |
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298 -- TODO find resource with greatest priority |
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299 res.send(stanza); |
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300 else |
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301 -- TODO send IQ error |
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302 end |
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303 else |
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304 -- User + resource is online... |
| 170 | 305 stanza.attr.to = res.full_jid; -- reset at the end of function |
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306 res.send(stanza); -- Yay \o/ |
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307 end |
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308 else |
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309 -- user not online |
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310 if user_exists(node, host) then |
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311 if stanza.name == "presence" then |
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312 if stanza.attr.type ~= nil and stanza.attr.type ~= "unavailable" then |
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313 handle_inbound_presence_subscriptions_and_probes(origin, stanza, from_bare, to_bare); |
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314 else |
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315 -- TODO send unavailable presence or unsubscribed |
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316 end |
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317 elseif stanza.name == "message" then |
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318 -- TODO send message error, or store offline messages |
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319 elseif stanza.name == "iq" then |
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320 -- TODO send IQ error |
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321 end |
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322 else -- user does not exist |
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323 -- 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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324 if stanza.name == "presence" then |
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325 if stanza.attr.type == "probe" then |
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326 origin.send(st.presence({from = to_bare, to = from_bare, type = "unsubscribed"})); |
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327 end |
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328 -- else ignore |
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329 else |
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330 origin.send(st.error_reply(stanza, "cancel", "service-unavailable")); |
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331 end |
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332 end |
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333 end |
| 148 | 334 elseif origin.type == "c2s" then |
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335 -- Remote host |
| 170 | 336 local xmlns = stanza.attr.xmlns; |
| 148 | 337 --stanza.attr.xmlns = "jabber:server"; |
| 338 stanza.attr.xmlns = nil; | |
| 146 | 339 log("debug", "sending s2s stanza: %s", tostring(stanza)); |
| 170 | 340 send_s2s(origin.host, host, stanza); -- TODO handle remote routing errors |
| 341 stanza.attr.xmlns = xmlns; -- reset | |
| 148 | 342 else |
| 343 log("warn", "received stanza from unhandled connection type: %s", origin.type); | |
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344 end |
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345 stanza.attr.to = to; -- reset |
| 30 | 346 end |
| 347 | |
| 348 function handle_stanza_toremote(stanza) | |
| 349 log("error", "Stanza bound for remote host, but s2s is not implemented"); | |
| 350 end |
