38 }; |
40 }; |
39 } |
41 } |
40 |
42 |
41 local hosts, users = hosts, users; |
43 local hosts, users = hosts, users; |
42 |
44 |
43 local ssl_ctx, msg = ssl.newcontext { mode = "server", protocol = "sslv23", key = "/home/matthew/ssl_cert/server.key", |
45 --local ssl_ctx, msg = ssl.newcontext { mode = "server", protocol = "sslv23", key = "/home/matthew/ssl_cert/server.key", |
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46 -- certificate = "/home/matthew/ssl_cert/server.crt", capath = "/etc/ssl/certs", verify = "none", } |
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47 -- |
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48 --if not ssl_ctx then error("Failed to initialise SSL/TLS support: "..tostring(msg)); end |
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49 |
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50 |
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51 local ssl_ctx = { mode = "server", protocol = "sslv23", key = "/home/matthew/ssl_cert/server.key", |
44 certificate = "/home/matthew/ssl_cert/server.crt", capath = "/etc/ssl/certs", verify = "none", } |
52 certificate = "/home/matthew/ssl_cert/server.crt", capath = "/etc/ssl/certs", verify = "none", } |
45 |
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46 if not ssl_ctx then error("Failed to initialise SSL/TLS support: "..tostring(msg)); end |
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47 |
53 |
48 |
54 |
49 function connect_host(host) |
55 function connect_host(host) |
50 hosts[host] = { type = "remote", sendbuffer = {} }; |
56 hosts[host] = { type = "remote", sendbuffer = {} }; |
51 end |
57 end |
52 |
58 |
53 function handler(conn) |
59 local function send_to(session, to, stanza) |
54 local copas_receive, copas_send = copas.receive, copas.send; |
60 local node, host, resource = jid.split(to); |
55 local reqdata, sktmsg; |
61 if not hosts[host] then |
56 local session = { sendbuffer = { external = {} }, conn = conn, notopen = true, priority = 0 } |
62 -- s2s |
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63 elseif hosts[host].type == "local" then |
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64 print(" ...is to a local user") |
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65 local destuser = hosts[host].sessions[node]; |
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66 if destuser and destuser.sessions then |
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67 if not destuser.sessions[resource] then |
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68 local best_session; |
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69 for resource, session in pairs(destuser.sessions) do |
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70 if not best_session then best_session = session; |
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71 elseif session.priority >= best_session.priority and session.priority >= 0 then |
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72 best_session = session; |
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73 end |
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74 end |
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75 if not best_session then |
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76 offlinemessage.new(node, host, stanza); |
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77 else |
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78 print("resource '"..resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); |
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79 resource = best_session.resource; |
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80 end |
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81 end |
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82 if destuser.sessions[resource] == session then |
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83 log("warn", "core", "Attempt to send stanza to self, dropping..."); |
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84 else |
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85 print("...sending...", tostring(stanza)); |
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86 --destuser.sessions[resource].conn.write(tostring(data)); |
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87 print(" to conn ", destuser.sessions[resource].conn); |
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88 destuser.sessions[resource].conn.write(tostring(stanza)); |
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89 print("...sent") |
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90 end |
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91 elseif stanza.name == "message" then |
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92 print(" ...will be stored offline"); |
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93 offlinemessage.new(node, host, stanza); |
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94 elseif stanza.name == "iq" then |
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95 print(" ...is an iq"); |
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96 session.send(st.reply(stanza) |
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97 :tag("error", { type = "cancel" }) |
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98 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); |
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99 end |
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100 print(" ...done routing"); |
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101 end |
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102 end |
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103 |
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104 function handler(conn, data, err) |
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105 local session = sessions[conn]; |
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106 |
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107 if not session then |
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108 sessions[conn] = { conn = conn, notopen = true, priority = 0 }; |
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109 session = sessions[conn]; |
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110 |
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111 -- Logging functions -- |
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112 |
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113 local mainlog, log = log; |
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114 do |
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115 local conn_name = tostring(conn):match("%w+$"); |
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116 log = function (type, area, message) mainlog(type, conn_name, message); end |
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117 end |
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118 local print = function (...) log("info", "core", t_concatall({...}, "\t")); end |
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119 session.log = log; |
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120 |
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121 -- -- -- |
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122 |
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123 -- Send buffers -- |
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124 |
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125 local send = function (data) print("Sending...", tostring(data)); conn.write(tostring(data)); end; |
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126 session.send, session.send_to = send, send_to; |
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127 |
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128 print("Client connected"); |
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129 |
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130 session.stanza_dispatch = init_stanza_dispatcher(session); |
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131 session.xml_handlers = init_xmlhandlers(session); |
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132 session.parser = lxp.new(session.xml_handlers, ":"); |
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133 |
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134 function session.disconnect(err) |
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135 print("Disconnected: "..err); |
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136 end |
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137 end |
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138 if data then |
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139 session.parser:parse(data); |
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140 end |
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141 |
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142 --log("info", "core", "Client disconnected, connection closed"); |
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143 end |
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144 |
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145 function disconnect(conn, err) |
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146 sessions[conn].disconnect(err); |
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147 end |
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148 |
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149 print("ssl_ctx:", type(ssl_ctx)); |
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150 |
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151 setmetatable(_G, { __index = function (t, k) print("WARNING: ATTEMPT TO READ A NIL GLOBAL!!!", k); error("Attempt to read a non-existent global. Naughty boy.", 2); end, __newindex = function (t, k, v) print("ATTEMPT TO SET A GLOBAL!!!!", tostring(k).." = "..tostring(v)); error("Attempt to set a global. Naughty boy.", 2); end }) --]][][[]][]; |
57 |
152 |
58 |
153 |
59 -- Logging functions -- |
154 local protected_handler = function (...) local success, ret = pcall(handler, ...); if not success then print("ERROR on "..tostring((select(1, ...)))..": "..ret); end end; |
60 |
155 |
61 local mainlog, log = log; |
156 print( server.add( { listener = protected_handler, disconnect = disconnect }, 5222, "*", 1, nil ) ) -- server.add will send a status message |
62 do |
157 print( server.add( { listener = protected_handler, disconnect = disconnect }, 5223, "*", 1, ssl_ctx ) ) -- server.add will send a status message |
63 local conn_name = tostring(conn):match("%w+$"); |
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64 log = function (type, area, message) mainlog(type, conn_name, message); end |
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65 end |
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66 local print = function (...) log("info", "core", t_concatall({...}, "\t")); end |
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67 session.log = log; |
|
68 |
158 |
69 -- -- -- |
159 server.loop(); |
70 |
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71 -- Send buffers -- |
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72 |
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73 local sendbuffer = session.sendbuffer; |
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74 local send = function (data) return t_insert(sendbuffer, tostring(data)); end; |
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75 local send_to = function (to, stanza) |
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76 local node, host, resource = jid.split(to); |
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77 print("Routing stanza to "..to..":", node, host, resource); |
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78 if not hosts[host] then |
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79 print(" ...but host offline, establishing connection"); |
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80 connect_host(host); |
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81 t_insert(hosts[host].sendbuffer, stanza); -- This will be sent when s2s connection succeeds |
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82 elseif hosts[host].connected then |
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83 print(" ...putting in our external send buffer"); |
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84 t_insert(sendbuffer.external, { node = node, host = host, resource = resource, data = stanza}); |
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85 print(" ...there are now "..tostring(#sendbuffer.external).." stanzas in the external send buffer"); |
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86 end |
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87 end |
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88 session.send, session.send_to = send, send_to; |
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89 |
|
90 -- -- -- |
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91 print("Client connected"); |
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92 conn = ssl.wrap(copas.wrap(conn), ssl_ctx); |
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93 |
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94 do |
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95 local succ, msg |
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96 conn:settimeout(15) |
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97 while not succ do |
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98 succ, msg = conn:dohandshake() |
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99 if not succ then |
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100 print("SSL: "..tostring(msg)); |
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101 if msg == 'wantread' then |
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102 socket.select({conn}, nil) |
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103 elseif msg == 'wantwrite' then |
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104 socket.select(nil, {conn}) |
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105 else |
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106 -- other error |
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107 end |
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108 end |
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109 end |
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110 end |
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111 print("SSL handshake complete"); |
|
112 -- XML parser initialisation -- |
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113 |
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114 local parser; |
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115 local stanza; |
|
116 |
|
117 local stanza_dispatch = init_stanza_dispatcher(session); |
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118 |
|
119 local xml_handlers = {}; |
|
120 |
|
121 do |
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122 local ns_stack = { "" }; |
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123 local curr_ns = ""; |
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124 local curr_tag; |
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125 function xml_handlers:StartElement(name, attr) |
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126 curr_ns,name = name:match("^(.+):(%w+)$"); |
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127 print("Tag received:", name, tostring(curr_ns)); |
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128 if not stanza then |
|
129 if session.notopen then |
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130 if name == "stream" then |
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131 session.host = attr.to or error("Client failed to specify destination hostname"); |
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132 session.version = attr.version or 0; |
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133 session.streamid = m_random(1000000, 99999999); |
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134 print(session, session.host, "Client opened stream"); |
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135 send("<?xml version='1.0'?>"); |
|
136 send(format("<stream:stream xmlns='jabber:client' xmlns:stream='http://etherx.jabber.org/streams' id='%s' from='%s' >", session.streamid, session.host)); |
|
137 --send("<stream:features>"); |
|
138 --send("<mechanism>PLAIN</mechanism>"); |
|
139 --send [[<register xmlns="http://jabber.org/features/iq-register"/> ]] |
|
140 --send("</stream:features>"); |
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141 log("info", "core", "Stream opened successfully"); |
|
142 session.notopen = nil; |
|
143 return; |
|
144 end |
|
145 error("Client failed to open stream successfully"); |
|
146 end |
|
147 if name ~= "iq" and name ~= "presence" and name ~= "message" then |
|
148 error("Client sent invalid top-level stanza"); |
|
149 end |
|
150 stanza = st.stanza(name, { to = attr.to, type = attr.type, id = attr.id, xmlns = curr_ns }); |
|
151 curr_tag = stanza; |
|
152 else |
|
153 attr.xmlns = curr_ns; |
|
154 stanza:tag(name, attr); |
|
155 end |
|
156 end |
|
157 function xml_handlers:CharacterData(data) |
|
158 if data:match("%S") then |
|
159 stanza:text(data); |
|
160 end |
|
161 end |
|
162 function xml_handlers:EndElement(name) |
|
163 curr_ns,name = name:match("^(.+):(%w+)$"); |
|
164 --print("<"..name.."/>", tostring(stanza), tostring(#stanza.last_add < 1), tostring(stanza.last_add[#stanza.last_add].name)); |
|
165 if (not stanza) or #stanza.last_add < 0 or (#stanza.last_add > 0 and name ~= stanza.last_add[#stanza.last_add].name) then error("XML parse error in client stream"); end |
|
166 -- Complete stanza |
|
167 print(name, tostring(#stanza.last_add)); |
|
168 if #stanza.last_add == 0 then |
|
169 stanza_dispatch(stanza); |
|
170 stanza = nil; |
|
171 else |
|
172 stanza:up(); |
|
173 end |
|
174 end |
|
175 --[[ function xml_handlers:StartNamespaceDecl(namespace) |
|
176 table.insert(ns_stack, namespace); |
|
177 curr_ns = namespace; |
|
178 log("debug", "parser", "Entering namespace "..tostring(curr_ns)); |
|
179 end |
|
180 function xml_handlers:EndNamespaceDecl(namespace) |
|
181 table.remove(ns_stack); |
|
182 log("debug", "parser", "Leaving namespace "..tostring(curr_ns)); |
|
183 curr_ns = ns_stack[#ns_stack]; |
|
184 log("debug", "parser", "Entering namespace "..tostring(curr_ns)); |
|
185 end |
|
186 ]] |
|
187 end |
|
188 parser = lxp.new(xml_handlers, ":"); |
|
189 |
|
190 -- -- -- |
|
191 |
|
192 -- Main loop -- |
|
193 print "Receiving..." |
|
194 reqdata = copas_receive(conn, 1); |
|
195 print "Received" |
|
196 while reqdata do |
|
197 parser:parse(reqdata); |
|
198 if #sendbuffer.external > 0 then |
|
199 -- Stanzas queued to go to other places, from us |
|
200 -- ie. other local users, or remote hosts that weren't connected before |
|
201 print(#sendbuffer.external.." stanzas queued for other recipients, sending now..."); |
|
202 for n, packet in pairs(sendbuffer.external) do |
|
203 if not hosts[packet.host] then |
|
204 connect_host(packet.host); |
|
205 t_insert(hosts[packet.host].sendbuffer, packet.data); |
|
206 elseif hosts[packet.host].type == "local" then |
|
207 print(" ...is to a local user") |
|
208 local destuser = hosts[packet.host].sessions[packet.node]; |
|
209 if destuser and destuser.sessions then |
|
210 if not destuser.sessions[packet.resource] then |
|
211 local best_resource; |
|
212 for resource, session in pairs(destuser.sessions) do |
|
213 if not best_session then best_session = session; |
|
214 elseif session.priority >= best_session.priority and session.priority >= 0 then |
|
215 best_session = session; |
|
216 end |
|
217 end |
|
218 if not best_session then |
|
219 offlinemessage.new(packet.node, packet.host, packet.data); |
|
220 else |
|
221 print("resource '"..packet.resource.."' was not online, have chosen to send to '"..best_session.username.."@"..best_session.host.."/"..best_session.resource.."'"); |
|
222 packet.resource = best_session.resource; |
|
223 end |
|
224 end |
|
225 if destuser.sessions[packet.resource] == session then |
|
226 log("warn", "core", "Attempt to send stanza to self, dropping..."); |
|
227 else |
|
228 print("...sending..."); |
|
229 copas_send(destuser.sessions[packet.resource].conn, tostring(packet.data)); |
|
230 print("...sent") |
|
231 end |
|
232 elseif packet.data.name == "message" then |
|
233 print(" ...will be stored offline"); |
|
234 offlinemessage.new(packet.node, packet.host, packet.data); |
|
235 elseif packet.data.name == "iq" then |
|
236 print(" ...is an iq"); |
|
237 send(st.reply(packet.data) |
|
238 :tag("error", { type = "cancel" }) |
|
239 :tag("service-unavailable", { xmlns = "urn:ietf:params:xml:ns:xmpp-stanzas" })); |
|
240 end |
|
241 print(" ...removing from send buffer"); |
|
242 sendbuffer.external[n] = nil; |
|
243 end |
|
244 end |
|
245 end |
|
246 |
|
247 if #sendbuffer > 0 then |
|
248 for n, data in ipairs(sendbuffer) do |
|
249 print "Sending..." |
|
250 copas_send(conn, data); |
|
251 print "Sent" |
|
252 sendbuffer[n] = nil; |
|
253 end |
|
254 end |
|
255 print "Receiving..." |
|
256 repeat |
|
257 reqdata, sktmsg = copas_receive(conn, 1); |
|
258 if sktmsg == 'wantread' then |
|
259 print("Received... wantread"); |
|
260 --socket.select({conn}, nil) |
|
261 --print("Socket ready now..."); |
|
262 elseif sktmsg then |
|
263 print("Received socket message:", sktmsg); |
|
264 end |
|
265 until reqdata or sktmsg == "closed"; |
|
266 print("Received", tostring(reqdata)); |
|
267 end |
|
268 log("info", "core", "Client disconnected, connection closed"); |
|
269 end |
|
270 |
|
271 server = socket.bind("*", 5223) |
|
272 assert(server, "Failed to bind to socket") |
|
273 copas.addserver(server, handler) |
|
274 |
|
275 copas.loop(); |
|