Sun, 24 Aug 2008 18:01:20 +0100
Added all the files to please hg :/
5 | 1 | --[[ |
2 | ||
3 | server.lua by blastbeat | |
4 | ||
5 | - this script contains the server loop of the program | |
6 | - other scripts can reg a server here | |
7 | ||
8 | ]]-- | |
9 | ||
10 | ----------------------------------// DECLARATION //-- | |
11 | ||
12 | --// constants //-- | |
13 | ||
14 | local STAT_UNIT = 1 / ( 1024 * 1024 ) -- mb | |
15 | ||
16 | --// lua functions //-- | |
17 | ||
18 | local function use( what ) return _G[ what ] end | |
19 | ||
20 | local type = use "type" | |
21 | local pairs = use "pairs" | |
22 | local ipairs = use "ipairs" | |
23 | local tostring = use "tostring" | |
24 | local collectgarbage = use "collectgarbage" | |
25 | ||
26 | --// lua libs //-- | |
27 | ||
28 | local table = use "table" | |
29 | local coroutine = use "coroutine" | |
30 | ||
31 | --// lua lib methods //-- | |
32 | ||
33 | local table_concat = table.concat | |
34 | local table_remove = table.remove | |
35 | local string_sub = use'string'.sub | |
36 | local coroutine_wrap = coroutine.wrap | |
37 | local coroutine_yield = coroutine.yield | |
38 | local print = print; | |
39 | local out_put = function () end --print; | |
40 | local out_error = print; | |
41 | ||
42 | --// extern libs //-- | |
43 | ||
44 | local luasec = require "ssl" | |
45 | local luasocket = require "socket" | |
46 | ||
47 | --// extern lib methods //-- | |
48 | ||
49 | local ssl_wrap = ( luasec and luasec.wrap ) | |
50 | local socket_bind = luasocket.bind | |
51 | local socket_select = luasocket.select | |
52 | local ssl_newcontext = ( luasec and luasec.newcontext ) | |
53 | ||
54 | --// functions //-- | |
55 | ||
56 | local loop | |
57 | local stats | |
58 | local addtimer | |
59 | local closeall | |
60 | local addserver | |
61 | local firetimer | |
62 | local closesocket | |
63 | local removesocket | |
64 | local wrapserver | |
65 | local wraptcpclient | |
66 | local wrapsslclient | |
67 | ||
68 | --// tables //-- | |
69 | ||
70 | local listener | |
71 | local readlist | |
72 | local writelist | |
73 | local socketlist | |
74 | local timelistener | |
75 | ||
76 | --// simple data types //-- | |
77 | ||
78 | local _ | |
79 | local readlen = 0 -- length of readlist | |
80 | local writelen = 0 -- lenght of writelist | |
81 | ||
82 | local sendstat= 0 | |
83 | local receivestat = 0 | |
84 | ||
85 | ----------------------------------// DEFINITION //-- | |
86 | ||
87 | listener = { } -- key = port, value = table | |
88 | readlist = { } -- array with sockets to read from | |
89 | writelist = { } -- arrary with sockets to write to | |
90 | socketlist = { } -- key = socket, value = wrapped socket | |
91 | timelistener = { } | |
92 | ||
93 | stats = function( ) | |
94 | return receivestat, sendstat | |
95 | end | |
96 | ||
97 | wrapserver = function( listener, socket, ip, serverport, mode, sslctx ) -- this function wraps a server | |
98 | ||
99 | local dispatch, disconnect = listener.listener, listener.disconnect -- dangerous | |
100 | ||
101 | local wrapclient, err | |
102 | ||
103 | if sslctx then | |
104 | if not ssl_newcontext then | |
105 | return nil, "luasec not found" | |
106 | -- elseif not cfg_get "use_ssl" then | |
107 | -- return nil, "ssl is deactivated" | |
108 | end | |
109 | if type( sslctx ) ~= "table" then | |
110 | out_error "server.lua: wrong server sslctx" | |
111 | return nil, "wrong server sslctx" | |
112 | end | |
113 | sslctx, err = ssl_newcontext( sslctx ) | |
114 | if not sslctx then | |
115 | err = err or "wrong sslctx parameters" | |
116 | out_error( "server.lua: ", err ) | |
117 | return nil, err | |
118 | end | |
119 | wrapclient = wrapsslclient | |
120 | else | |
121 | wrapclient = wraptcpclient | |
122 | end | |
123 | ||
124 | local accept = socket.accept | |
125 | local close = socket.close | |
126 | ||
127 | --// public methods of the object //-- | |
128 | ||
129 | local handler = { } | |
130 | ||
131 | handler.shutdown = function( ) end | |
132 | ||
133 | --[[handler.listener = function( data, err ) | |
134 | return ondata( handler, data, err ) | |
135 | end]] | |
136 | handler.ssl = function( ) | |
137 | return sslctx and true or false | |
138 | end | |
139 | handler.close = function( closed ) | |
140 | _ = not closed and close( socket ) | |
141 | writelen = removesocket( writelist, socket, writelen ) | |
142 | readlen = removesocket( readlist, socket, readlen ) | |
143 | socketlist[ socket ] = nil | |
144 | handler = nil | |
145 | end | |
146 | handler.ip = function( ) | |
147 | return ip | |
148 | end | |
149 | handler.serverport = function( ) | |
150 | return serverport | |
151 | end | |
152 | handler.socket = function( ) | |
153 | return socket | |
154 | end | |
155 | handler.receivedata = function( ) | |
156 | local client, err = accept( socket ) -- try to accept | |
157 | if client then | |
158 | local ip, clientport = client:getpeername( ) | |
159 | client:settimeout( 0 ) | |
160 | local handler, client, err = wrapclient( listener, client, ip, serverport, clientport, mode, sslctx ) -- wrap new client socket | |
161 | if err then -- error while wrapping ssl socket | |
162 | return false | |
163 | end | |
164 | out_put( "server.lua: accepted new client connection from ", ip, ":", clientport ) | |
165 | return dispatch( handler ) | |
166 | elseif err then -- maybe timeout or something else | |
167 | out_put( "server.lua: error with new client connection: ", err ) | |
168 | return false | |
169 | end | |
170 | end | |
171 | return handler | |
172 | end | |
173 | ||
174 | wrapsslclient = function( listener, socket, ip, serverport, clientport, mode, sslctx ) -- this function wraps a ssl cleint | |
175 | ||
176 | local dispatch, disconnect = listener.listener, listener.disconnect | |
177 | ||
178 | --// transform socket to ssl object //-- | |
179 | ||
180 | local err | |
181 | socket, err = ssl_wrap( socket, sslctx ) -- wrap socket | |
182 | if err then | |
183 | out_put( "server.lua: ssl error: ", err ) | |
184 | return nil, nil, err -- fatal error | |
185 | end | |
186 | socket:settimeout( 0 ) | |
187 | ||
188 | --// private closures of the object //-- | |
189 | ||
190 | local writequeue = { } -- buffer for messages to send | |
191 | ||
192 | local eol -- end of buffer | |
193 | ||
194 | local sstat, rstat = 0, 0 | |
195 | ||
196 | --// local import of socket methods //-- | |
197 | ||
198 | local send = socket.send | |
199 | local receive = socket.receive | |
200 | local close = socket.close | |
201 | --local shutdown = socket.shutdown | |
202 | ||
203 | --// public methods of the object //-- | |
204 | ||
205 | local handler = { } | |
206 | ||
207 | handler.getstats = function( ) | |
208 | return rstat, sstat | |
209 | end | |
210 | ||
211 | handler.listener = function( data, err ) | |
212 | return listener( handler, data, err ) | |
213 | end | |
214 | handler.ssl = function( ) | |
215 | return true | |
216 | end | |
217 | handler.send = function( _, data, i, j ) | |
218 | return send( socket, data, i, j ) | |
219 | end | |
220 | handler.receive = function( pattern, prefix ) | |
221 | return receive( socket, pattern, prefix ) | |
222 | end | |
223 | handler.shutdown = function( pattern ) | |
224 | --return shutdown( socket, pattern ) | |
225 | end | |
226 | handler.close = function( closed ) | |
227 | close( socket ) | |
228 | writelen = ( eol and removesocket( writelist, socket, writelen ) ) or writelen | |
229 | readlen = removesocket( readlist, socket, readlen ) | |
230 | socketlist[ socket ] = nil | |
231 | out_put "server.lua: closed handler and removed socket from list" | |
232 | end | |
233 | handler.ip = function( ) | |
234 | return ip | |
235 | end | |
236 | handler.serverport = function( ) | |
237 | return serverport | |
238 | end | |
239 | handler.clientport = function( ) | |
240 | return clientport | |
241 | end | |
242 | ||
243 | handler.write = function( data ) | |
244 | if not eol then | |
245 | writelen = writelen + 1 | |
246 | writelist[ writelen ] = socket | |
247 | eol = 0 | |
248 | end | |
249 | eol = eol + 1 | |
250 | writequeue[ eol ] = data | |
251 | end | |
252 | handler.writequeue = function( ) | |
253 | return writequeue | |
254 | end | |
255 | handler.socket = function( ) | |
256 | return socket | |
257 | end | |
258 | handler.mode = function( ) | |
259 | return mode | |
260 | end | |
261 | handler._receivedata = function( ) | |
262 | local data, err, part = receive( socket, mode ) -- receive data in "mode" | |
263 | if not err or ( err == "timeout" or err == "wantread" ) then -- received something | |
264 | local data = data or part or "" | |
265 | local count = #data * STAT_UNIT | |
266 | rstat = rstat + count | |
267 | receivestat = receivestat + count | |
268 | out_put( "server.lua: read data '", data, "', error: ", err ) | |
269 | return dispatch( handler, data, err ) | |
270 | else -- connections was closed or fatal error | |
271 | out_put( "server.lua: client ", ip, ":", clientport, " error: ", err ) | |
272 | handler.close( ) | |
273 | disconnect( handler, err ) | |
274 | writequeue = nil | |
275 | handler = nil | |
276 | return false | |
277 | end | |
278 | end | |
279 | handler._dispatchdata = function( ) -- this function writes data to handlers | |
280 | local buffer = table_concat( writequeue, "", 1, eol ) | |
281 | local succ, err, byte = send( socket, buffer ) | |
282 | local count = ( succ or 0 ) * STAT_UNIT | |
283 | sstat = sstat + count | |
284 | sendstat = sendstat + count | |
285 | out_put( "server.lua: sended '", buffer, "', bytes: ", succ, ", error: ", err, ", part: ", byte, ", to: ", ip, ":", clientport ) | |
286 | if succ then -- sending succesful | |
287 | --writequeue = { } | |
288 | eol = nil | |
289 | writelen = removesocket( writelist, socket, writelen ) -- delete socket from writelist | |
290 | return true | |
291 | elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write | |
292 | buffer = string_sub( buffer, byte + 1, -1 ) -- new buffer | |
293 | writequeue[ 1 ] = buffer -- insert new buffer in queue | |
294 | eol = 1 | |
295 | return true | |
296 | else -- connection was closed during sending or fatal error | |
297 | out_put( "server.lua: client ", ip, ":", clientport, " error: ", err ) | |
298 | handler.close( ) | |
299 | disconnect( handler, err ) | |
300 | writequeue = nil | |
301 | handler = nil | |
302 | return false | |
303 | end | |
304 | end | |
305 | ||
306 | -- // COMPAT // -- | |
307 | ||
308 | handler.getIp = handler.ip | |
309 | handler.getPort = handler.clientport | |
310 | ||
311 | --// handshake //-- | |
312 | ||
313 | local wrote | |
314 | ||
315 | handler.handshake = coroutine_wrap( function( client ) | |
316 | local err | |
317 | for i = 1, 10 do -- 10 handshake attemps | |
318 | _, err = client:dohandshake( ) | |
319 | if not err then | |
320 | out_put( "server.lua: ssl handshake done" ) | |
321 | writelen = ( wrote and removesocket( writelist, socket, writelen ) ) or writelen | |
322 | handler.receivedata = handler._receivedata -- when handshake is done, replace the handshake function with regular functions | |
323 | handler.dispatchdata = handler._dispatchdata | |
324 | return dispatch( handler ) | |
325 | else | |
326 | out_put( "server.lua: error during ssl handshake: ", err ) | |
327 | if err == "wantwrite" then | |
328 | if wrote == nil then | |
329 | writelen = writelen + 1 | |
330 | writelist[ writelen ] = client | |
331 | wrote = true | |
332 | end | |
333 | end | |
334 | coroutine_yield( handler, nil, err ) -- handshake not finished | |
335 | end | |
336 | end | |
337 | _ = err ~= "closed" and close( socket ) | |
338 | handler.close( ) | |
339 | disconnect( handler, err ) | |
340 | writequeue = nil | |
341 | handler = nil | |
342 | return false -- handshake failed | |
343 | end | |
344 | ) | |
345 | handler.receivedata = handler.handshake | |
346 | handler.dispatchdata = handler.handshake | |
347 | ||
348 | handler.handshake( socket ) -- do handshake | |
349 | ||
350 | socketlist[ socket ] = handler | |
351 | readlen = readlen + 1 | |
352 | readlist[ readlen ] = socket | |
353 | ||
354 | return handler, socket | |
355 | end | |
356 | ||
357 | wraptcpclient = function( listener, socket, ip, serverport, clientport, mode ) -- this function wraps a socket | |
358 | ||
359 | local dispatch, disconnect = listener.listener, listener.disconnect | |
360 | ||
361 | --// private closures of the object //-- | |
362 | ||
363 | local writequeue = { } -- list for messages to send | |
364 | ||
365 | local eol | |
366 | ||
367 | local rstat, sstat = 0, 0 | |
368 | ||
369 | --// local import of socket methods //-- | |
370 | ||
371 | local send = socket.send | |
372 | local receive = socket.receive | |
373 | local close = socket.close | |
374 | local shutdown = socket.shutdown | |
375 | ||
376 | --// public methods of the object //-- | |
377 | ||
378 | local handler = { } | |
379 | ||
380 | handler.getstats = function( ) | |
381 | return rstat, sstat | |
382 | end | |
383 | ||
384 | handler.listener = function( data, err ) | |
385 | return listener( handler, data, err ) | |
386 | end | |
387 | handler.ssl = function( ) | |
388 | return false | |
389 | end | |
390 | handler.send = function( _, data, i, j ) | |
391 | return send( socket, data, i, j ) | |
392 | end | |
393 | handler.receive = function( pattern, prefix ) | |
394 | return receive( socket, pattern, prefix ) | |
395 | end | |
396 | handler.shutdown = function( pattern ) | |
397 | return shutdown( socket, pattern ) | |
398 | end | |
399 | handler.close = function( closed ) | |
400 | _ = not closed and shutdown( socket ) | |
401 | _ = not closed and close( socket ) | |
402 | writelen = ( eol and removesocket( writelist, socket, writelen ) ) or writelen | |
403 | readlen = removesocket( readlist, socket, readlen ) | |
404 | socketlist[ socket ] = nil | |
405 | out_put "server.lua: closed handler and removed socket from list" | |
406 | end | |
407 | handler.ip = function( ) | |
408 | return ip | |
409 | end | |
410 | handler.serverport = function( ) | |
411 | return serverport | |
412 | end | |
413 | handler.clientport = function( ) | |
414 | return clientport | |
415 | end | |
416 | handler.write = function( data ) | |
417 | if not eol then | |
418 | writelen = writelen + 1 | |
419 | writelist[ writelen ] = socket | |
420 | eol = 0 | |
421 | end | |
422 | eol = eol + 1 | |
423 | writequeue[ eol ] = data | |
424 | end | |
425 | handler.writequeue = function( ) | |
426 | return writequeue | |
427 | end | |
428 | handler.socket = function( ) | |
429 | return socket | |
430 | end | |
431 | handler.mode = function( ) | |
432 | return mode | |
433 | end | |
434 | handler.receivedata = function( ) | |
435 | local data, err, part = receive( socket, mode ) -- receive data in "mode" | |
436 | if not err or ( err == "timeout" or err == "wantread" ) then -- received something | |
437 | local data = data or part or "" | |
438 | local count = #data * STAT_UNIT | |
439 | rstat = rstat + count | |
440 | receivestat = receivestat + count | |
441 | out_put( "server.lua: read data '", data, "', error: ", err ) | |
442 | return dispatch( handler, data, err ) | |
443 | else -- connections was closed or fatal error | |
444 | out_put( "server.lua: client ", ip, ":", clientport, " error: ", err ) | |
445 | handler.close( ) | |
446 | disconnect( handler, err ) | |
447 | writequeue = nil | |
448 | handler = nil | |
449 | return false | |
450 | end | |
451 | end | |
452 | handler.dispatchdata = function( ) -- this function writes data to handlers | |
453 | local buffer = table_concat( writequeue, "", 1, eol ) | |
454 | local succ, err, byte = send( socket, buffer ) | |
455 | local count = ( succ or 0 ) * STAT_UNIT | |
456 | sstat = sstat + count | |
457 | sendstat = sendstat + count | |
458 | out_put( "server.lua: sended '", buffer, "', bytes: ", succ, ", error: ", err, ", part: ", byte, ", to: ", ip, ":", clientport ) | |
459 | if succ then -- sending succesful | |
460 | --writequeue = { } | |
461 | eol = nil | |
462 | writelen = removesocket( writelist, socket, writelen ) -- delete socket from writelist | |
463 | return true | |
464 | elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write | |
465 | buffer = string_sub( buffer, byte + 1, -1 ) -- new buffer | |
466 | writequeue[ 1 ] = buffer -- insert new buffer in queue | |
467 | eol = 1 | |
468 | return true | |
469 | else -- connection was closed during sending or fatal error | |
470 | out_put( "server.lua: client ", ip, ":", clientport, " error: ", err ) | |
471 | handler.close( ) | |
472 | disconnect( handler, err ) | |
473 | writequeue = nil | |
474 | handler = nil | |
475 | return false | |
476 | end | |
477 | end | |
478 | ||
479 | -- // COMPAT // -- | |
480 | ||
481 | handler.getIp = handler.ip | |
482 | handler.getPort = handler.clientport | |
483 | ||
484 | socketlist[ socket ] = handler | |
485 | readlen = readlen + 1 | |
486 | readlist[ readlen ] = socket | |
487 | ||
488 | return handler, socket | |
489 | end | |
490 | ||
491 | addtimer = function( listener ) | |
492 | timelistener[ #timelistener + 1 ] = listener | |
493 | end | |
494 | ||
495 | firetimer = function( listener ) | |
496 | for i, listener in ipairs( timelistener ) do | |
497 | listener( ) | |
498 | end | |
499 | end | |
500 | ||
501 | addserver = function( listeners, port, addr, mode, sslctx ) -- this function provides a way for other scripts to reg a server | |
502 | local err | |
503 | if type( listeners ) ~= "table" then | |
504 | err = "invalid listener table" | |
505 | else | |
506 | for name, func in pairs( listeners ) do | |
507 | if type( func ) ~= "function" then | |
508 | err = "invalid listener function" | |
509 | break | |
510 | end | |
511 | end | |
512 | end | |
513 | if not type( port ) == "number" or not ( port >= 0 and port <= 65535 ) then | |
514 | err = "invalid port" | |
515 | elseif listener[ port ] then | |
516 | err= "listeners on port '" .. port .. "' already exist" | |
517 | elseif sslctx and not luasec then | |
518 | err = "luasec not found" | |
519 | end | |
520 | if err then | |
521 | out_error( "server.lua: ", err ) | |
522 | return nil, err | |
523 | end | |
524 | addr = addr or "*" | |
525 | local server, err = socket_bind( addr, port ) | |
526 | if err then | |
527 | out_error( "server.lua: ", err ) | |
528 | return nil, err | |
529 | end | |
530 | local handler, err = wrapserver( listeners, server, addr, port, mode, sslctx ) -- wrap new server socket | |
531 | if not handler then | |
532 | server:close( ) | |
533 | return nil, err | |
534 | end | |
535 | server:settimeout( 0 ) | |
536 | readlen = readlen + 1 | |
537 | readlist[ readlen ] = server | |
538 | listener[ port ] = listeners | |
539 | socketlist[ server ] = handler | |
540 | out_put( "server.lua: new server listener on ", addr, ":", port ) | |
541 | return true | |
542 | end | |
543 | ||
544 | removesocket = function( tbl, socket, len ) -- this function removes sockets from a list | |
545 | for i, target in ipairs( tbl ) do | |
546 | if target == socket then | |
547 | len = len - 1 | |
548 | table_remove( tbl, i ) | |
549 | return len | |
550 | end | |
551 | end | |
552 | return len | |
553 | end | |
554 | ||
555 | closeall = function( ) | |
556 | for _, handler in pairs( socketlist ) do | |
557 | handler.shutdown( ) | |
558 | handler.close( ) | |
559 | socketlist[ _ ] = nil | |
560 | end | |
561 | writelist, readlist, socketlist = { }, { }, { } | |
562 | end | |
563 | ||
564 | closesocket = function( socket ) | |
565 | writelen = removesocket( writelist, socket, writelen ) | |
566 | readlen = removesocket( readlist, socket, readlen ) | |
567 | socketlist[ socket ] = nil | |
568 | socket:close( ) | |
569 | end | |
570 | ||
571 | loop = function( ) -- this is the main loop of the program | |
572 | --signal_set( "hub", "run" ) | |
573 | repeat | |
574 | local read, write, err = socket_select( readlist, writelist, 1 ) -- 1 sec timeout, nice for timers | |
575 | for i, socket in ipairs( write ) do -- send data waiting in writequeues | |
576 | local handler = socketlist[ socket ] | |
577 | if handler then | |
578 | handler.dispatchdata( ) | |
579 | else | |
580 | closesocket( socket ) | |
581 | out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen | |
582 | end | |
583 | end | |
584 | for i, socket in ipairs( read ) do -- receive data | |
585 | local handler = socketlist[ socket ] | |
586 | if handler then | |
587 | handler.receivedata( ) | |
588 | else | |
589 | closesocket( socket ) | |
590 | out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen | |
591 | end | |
592 | end | |
593 | firetimer( ) | |
594 | --collectgarbage "collect" | |
595 | until false --signal_get "hub" ~= "run" | |
596 | return --signal_get "hub" | |
597 | end | |
598 | ||
599 | ----------------------------------// BEGIN //-- | |
600 | ||
601 | ----------------------------------// PUBLIC INTERFACE //-- | |
602 | ||
603 | return { | |
604 | ||
605 | add = addserver, | |
606 | loop = loop, | |
607 | stats = stats, | |
608 | closeall = closeall, | |
609 | addtimer = addtimer, | |
610 | ||
611 | } |