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1
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2 require "util.stanza"
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3
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4 local st = stanza;
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5
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6 local t_concat = table.concat;
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7 local format = string.format;
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8
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9 function init_stanza_dispatcher(session)
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10 local iq_handlers = {};
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11
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12 local session_log = session.log;
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13 local log = function (type, msg) session_log(type, "stanza_dispatcher", msg); end
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14 local send = session.send;
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15 local send_to;
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16 do
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17 local _send_to = session.send_to;
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18 send_to = function (...) _send_to(session, ...); end
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19 end
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20
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21 iq_handlers["jabber:iq:auth"] =
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22 function (stanza)
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23 local username = stanza.tags[1]:child_with_name("username");
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24 local password = stanza.tags[1]:child_with_name("password");
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25 local resource = stanza.tags[1]:child_with_name("resource");
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26 if not (username and password and resource) then
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27 local reply = st.reply(stanza);
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28 send(reply:query("jabber:iq:auth")
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29 :tag("username"):up()
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30 :tag("password"):up()
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31 :tag("resource"):up());
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32 return true;
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33 else
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34 username, password, resource = t_concat(username), t_concat(password), t_concat(resource);
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35 print(username, password, resource)
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36 local reply = st.reply(stanza);
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37 require "core.usermanager"
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38 if usermanager.validate_credentials(session.host, username, password) then
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39 -- Authentication successful!
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40 session.username = username;
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41 session.resource = resource;
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42 session.full_jid = username.."@"..session.host.."/"..session.resource;
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43 if not hosts[session.host].sessions[username] then
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44 hosts[session.host].sessions[username] = { sessions = {} };
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45 end
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46 hosts[session.host].sessions[username].sessions[resource] = session;
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47 send(st.reply(stanza));
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48 return true;
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49 else
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50 local reply = st.reply(stanza);
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51 reply.attr.type = "error";
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52 reply:tag("error", { code = "401", type = "auth" })
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53 :tag("not-authorized", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" });
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54 send(reply);
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55 return true;
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56 end
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57 end
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58
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59 end
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60
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61 iq_handlers["jabber:iq:roster"] =
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62 function (stanza)
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63 if stanza.attr.type == "get" then
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64 session.roster = session.roster or rostermanager.getroster(session.username, session.host);
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65 if session.roster == false then
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66 send(st.reply(stanza)
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67 :tag("error", { type = "wait" })
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68 :tag("internal-server-error", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas"}));
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69 return true;
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70 else session.roster = session.roster or {};
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71 end
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72 local roster = st.reply(stanza)
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73 :query("jabber:iq:roster");
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74 for jid in pairs(session.roster) do
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75 roster:tag("item", { jid = jid, subscription = "none" }):up();
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76 end
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77 send(roster);
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78 return true;
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79 end
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80 end
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81
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82
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83 return function (stanza)
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84 log("info", "--> "..tostring(stanza));
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85 if (not stanza.attr.to) or (hosts[stanza.attr.to] and hosts[stanza.attr.to].type == "local") then
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86 if stanza.name == "iq" then
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87 if not stanza.tags[1] then log("warn", "<iq> without child is invalid"); return; end
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88 if not stanza.attr.id then log("warn", "<iq> without id attribute is invalid"); end
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89 local xmlns = (stanza.tags[1].attr and stanza.tags[1].attr.xmlns) or nil;
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90 if not xmlns then log("warn", "Child of <iq> has no xmlns - invalid"); return; end
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91 if (((not stanza.attr.to) or stanza.attr.to == session.host or stanza.attr.to:match("@[^/]+$")) and (stanza.attr.type == "get" or stanza.attr.type == "set")) then -- Stanza sent to us
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92 if iq_handlers[xmlns] then
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93 if iq_handlers[xmlns](stanza) then return; end;
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94 end
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95 log("warn", "Unhandled namespace: "..xmlns);
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96 send(format("<iq type='error' id='%s'><error type='cancel'><service-unavailable/></error></iq>", stanza.attr.id));
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97 return;
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98 end
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99 elseif stanza.name == "presence" then
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100 if session.roster then
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101 local initial_presence = not session.last_presence;
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102 session.last_presence = stanza;
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103
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104 -- Broadcast presence and probes
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105 local broadcast = st.presence({ from = session.full_jid, type = stanza.attr.type });
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106 --local probe = st.presence { from = broadcast.attr.from, type = "probe" };
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107
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108 for child in stanza:childtags() do
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109 broadcast:add_child(child);
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110 end
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111 for contact_jid in pairs(session.roster) do
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112 broadcast.attr.to = contact_jid;
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113 send_to(contact_jid, broadcast);
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114 if initial_presence then
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115 print("Initital presence");
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116 local node, host = jid.split(contact_jid);
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117 if hosts[host] and hosts[host].type == "local" then
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118 local contact = hosts[host].sessions[node]
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119 if contact then
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120 local pres = st.presence { to = session.full_jid };
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121 for resource, contact_session in pairs(contact.sessions) do
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122 if contact_session.last_presence then
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123 pres.tags = contact_session.last_presence.tags;
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124 pres.attr.from = contact_session.full_jid;
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125 send(pres);
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126 end
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127 end
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128 end
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129 --FIXME: Do we send unavailable if they are offline?
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130 else
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131 probe.attr.to = contact;
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132 send_to(contact, probe);
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133 end
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134 end
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135 end
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136
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137 -- Probe for our contacts' presence
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138 end
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139 end
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140 else
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141 --end
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142 --if stanza.attr.to and ((not hosts[stanza.attr.to]) or hosts[stanza.attr.to].type ~= "local") then
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143 -- Need to route stanza
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144 stanza.attr.from = session.username.."@"..session.host;
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145 session:send_to(stanza.attr.to, stanza);
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146 end
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147 end
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148
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149 end
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150
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