Mercurial > lxmppd-hg-xmllex / file comparison
comparison: main.lua
main.lua
- changeset 0
- 3e3171b59028
- child 1
- b8787e859fd2
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| -1:000000000000 | 0:3e3171b59028 |
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| 1 require "luarocks.require" | |
| 2 | |
| 3 require "copas" | |
| 4 require "socket" | |
| 5 require "ssl" | |
| 6 require "lxp" | |
| 7 | |
| 8 function log(type, area, message) | |
| 9 print(type, area, message); | |
| 10 end | |
| 11 | |
| 12 require "core.stanza_dispatch" | |
| 13 require "core.rostermanager" | |
| 14 require "core.offlinemessage" | |
| 15 require "util.stanza" | |
| 16 require "util.jid" | |
| 17 | |
| 18 -- Locals for faster access -- | |
| 19 local t_insert = table.insert; | |
| 20 local t_concat = table.concat; | |
| 21 local t_concatall = function (t, sep) local tt = {}; for _, s in ipairs(t) do t_insert(tt, tostring(s)); end return t_concat(tt, sep); end | |
| 22 local m_random = math.random; | |
| 23 local format = string.format; | |
| 24 local st = stanza; | |
| 25 ------------------------------ | |
| 26 | |
| 27 users = {}; | |
| 28 hosts = { | |
| 29 ["localhost"] = { | |
| 30 type = "local"; | |
| 31 connected = true; | |
| 32 sessions = {}; | |
| 33 }; | |
| 34 ["getjabber.ath.cx"] = { | |
| 35 type = "local"; | |
| 36 connected = true; | |
| 37 sessions = {}; | |
| 38 }; | |
| 39 } | |
| 40 | |
| 41 local hosts, users = hosts, users; | |
| 42 | |
| 43 local ssl_ctx, msg = ssl.newcontext { 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", } | |
| 45 | |
| 46 if not ssl_ctx then error("Failed to initialise SSL/TLS support: "..tostring(msg)); end | |
| 47 | |
| 48 | |
| 49 function connect_host(host) | |
| 50 hosts[host] = { type = "remote", sendbuffer = {} }; | |
| 51 end | |
| 52 | |
| 53 function handler(conn) | |
| 54 local copas_receive, copas_send = copas.receive, copas.send; | |
| 55 local reqdata, sktmsg; | |
| 56 local session = { sendbuffer = { external = {} }, conn = conn, notopen = true, priority = 0 } | |
| 57 | |
| 58 | |
| 59 -- Logging functions -- | |
| 60 | |
| 61 local mainlog, log = log; | |
| 62 do | |
| 63 local conn_name = tostring(conn):match("%w+$"); | |
| 64 log = function (type, area, message) mainlog(type, conn_name, message); end | |
| 65 end | |
| 66 local print = function (...) log("info", "core", t_concatall({...}, "\t")); end | |
| 67 session.log = log; | |
| 68 | |
| 69 -- -- -- | |
| 70 | |
| 71 -- Send buffers -- | |
| 72 | |
| 73 local sendbuffer = session.sendbuffer; | |
| 74 local send = function (data) return t_insert(sendbuffer, tostring(data)); end; | |
| 75 local send_to = function (to, stanza) | |
| 76 local node, host, resource = jid.split(to); | |
| 77 print("Routing stanza to "..to..":", node, host, resource); | |
| 78 if not hosts[host] then | |
| 79 print(" ...but host offline, establishing connection"); | |
| 80 connect_host(host); | |
| 81 t_insert(hosts[host].sendbuffer, stanza); -- This will be sent when s2s connection succeeds | |
| 82 elseif hosts[host].connected then | |
| 83 print(" ...putting in our external send buffer"); | |
| 84 t_insert(sendbuffer.external, { node = node, host = host, resource = resource, data = stanza}); | |
| 85 print(" ...there are now "..tostring(#sendbuffer.external).." stanzas in the external send buffer"); | |
| 86 end | |
| 87 end | |
| 88 session.send, session.send_to = send, send_to; | |
| 89 | |
| 90 -- -- -- | |
| 91 print("Client connected"); | |
| 92 conn = ssl.wrap(copas.wrap(conn), ssl_ctx); | |
| 93 | |
| 94 do | |
| 95 local succ, msg | |
| 96 conn:settimeout(15) | |
| 97 while not succ do | |
| 98 succ, msg = conn:dohandshake() | |
| 99 if not succ then | |
| 100 print("SSL: "..tostring(msg)); | |
| 101 if msg == 'wantread' then | |
| 102 socket.select({conn}, nil) | |
| 103 elseif msg == 'wantwrite' then | |
| 104 socket.select(nil, {conn}) | |
| 105 else | |
| 106 -- other error | |
| 107 end | |
| 108 end | |
| 109 end | |
| 110 end | |
| 111 print("SSL handshake complete"); | |
| 112 -- XML parser initialisation -- | |
| 113 | |
| 114 local parser; | |
| 115 local stanza; | |
| 116 | |
| 117 local stanza_dispatch = init_stanza_dispatcher(session); | |
| 118 | |
| 119 local xml_handlers = {}; | |
| 120 | |
| 121 do | |
| 122 local ns_stack = { "" }; | |
| 123 local curr_ns = ""; | |
| 124 local curr_tag; | |
| 125 function xml_handlers:StartElement(name, attr) | |
| 126 curr_ns,name = name:match("^(.+):(%w+)$"); | |
| 127 print("Tag received:", name, tostring(curr_ns)); | |
| 128 if not stanza then | |
| 129 if session.notopen then | |
| 130 if name == "stream" then | |
| 131 session.host = attr.to or error("Client failed to specify destination hostname"); | |
| 132 session.version = attr.version or 0; | |
| 133 session.streamid = m_random(1000000, 99999999); | |
| 134 print(session, session.host, "Client opened stream"); | |
| 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>"); | |
| 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(); |
