Mercurial > mooncached / file comparison
comparison: net/server.lua
net/server.lua
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- 73bc20975514
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| 1 -- | |
| 2 -- server.lua by blastbeat of the luadch project | |
| 3 -- Re-used here under the MIT/X Consortium License | |
| 4 -- | |
| 5 -- Modifications (C) 2008-2010 Matthew Wild, Waqas Hussain | |
| 6 -- | |
| 7 | |
| 8 -- // wrapping luadch stuff // -- | |
| 9 | |
| 10 local use = function( what ) | |
| 11 return _G[ what ] | |
| 12 end | |
| 13 local clean = function( tbl ) | |
| 14 for i, k in pairs( tbl ) do | |
| 15 tbl[ i ] = nil | |
| 16 end | |
| 17 end | |
| 18 | |
| 19 local log, table_concat = require ("util.logger").init("socket"), table.concat; | |
| 20 local out_put = function (...) return log("debug", table_concat{...}); end | |
| 21 local out_error = function (...) return log("warn", table_concat{...}); end | |
| 22 local mem_free = collectgarbage | |
| 23 | |
| 24 ----------------------------------// DECLARATION //-- | |
| 25 | |
| 26 --// constants //-- | |
| 27 | |
| 28 local STAT_UNIT = 1 -- byte | |
| 29 | |
| 30 --// lua functions //-- | |
| 31 | |
| 32 local type = use "type" | |
| 33 local pairs = use "pairs" | |
| 34 local ipairs = use "ipairs" | |
| 35 local tostring = use "tostring" | |
| 36 local collectgarbage = use "collectgarbage" | |
| 37 | |
| 38 --// lua libs //-- | |
| 39 | |
| 40 local os = use "os" | |
| 41 local table = use "table" | |
| 42 local string = use "string" | |
| 43 local coroutine = use "coroutine" | |
| 44 | |
| 45 --// lua lib methods //-- | |
| 46 | |
| 47 local os_time = os.time | |
| 48 local os_difftime = os.difftime | |
| 49 local table_concat = table.concat | |
| 50 local table_remove = table.remove | |
| 51 local string_len = string.len | |
| 52 local string_sub = string.sub | |
| 53 local coroutine_wrap = coroutine.wrap | |
| 54 local coroutine_yield = coroutine.yield | |
| 55 | |
| 56 --// extern libs //-- | |
| 57 | |
| 58 local luasec = use "ssl" | |
| 59 local luasocket = use "socket" or require "socket" | |
| 60 | |
| 61 --// extern lib methods //-- | |
| 62 | |
| 63 local ssl_wrap = ( luasec and luasec.wrap ) | |
| 64 local socket_bind = luasocket.bind | |
| 65 local socket_sleep = luasocket.sleep | |
| 66 local socket_select = luasocket.select | |
| 67 local ssl_newcontext = ( luasec and luasec.newcontext ) | |
| 68 | |
| 69 --// functions //-- | |
| 70 | |
| 71 local id | |
| 72 local loop | |
| 73 local stats | |
| 74 local idfalse | |
| 75 local addtimer | |
| 76 local closeall | |
| 77 local addserver | |
| 78 local getserver | |
| 79 local wrapserver | |
| 80 local getsettings | |
| 81 local closesocket | |
| 82 local removesocket | |
| 83 local removeserver | |
| 84 local changetimeout | |
| 85 local wrapconnection | |
| 86 local changesettings | |
| 87 | |
| 88 --// tables //-- | |
| 89 | |
| 90 local _server | |
| 91 local _readlist | |
| 92 local _timerlist | |
| 93 local _sendlist | |
| 94 local _socketlist | |
| 95 local _closelist | |
| 96 local _readtimes | |
| 97 local _writetimes | |
| 98 | |
| 99 --// simple data types //-- | |
| 100 | |
| 101 local _ | |
| 102 local _readlistlen | |
| 103 local _sendlistlen | |
| 104 local _timerlistlen | |
| 105 | |
| 106 local _sendtraffic | |
| 107 local _readtraffic | |
| 108 | |
| 109 local _selecttimeout | |
| 110 local _sleeptime | |
| 111 | |
| 112 local _starttime | |
| 113 local _currenttime | |
| 114 | |
| 115 local _maxsendlen | |
| 116 local _maxreadlen | |
| 117 | |
| 118 local _checkinterval | |
| 119 local _sendtimeout | |
| 120 local _readtimeout | |
| 121 | |
| 122 local _cleanqueue | |
| 123 | |
| 124 local _timer | |
| 125 | |
| 126 local _maxclientsperserver | |
| 127 | |
| 128 ----------------------------------// DEFINITION //-- | |
| 129 | |
| 130 _server = { } -- key = port, value = table; list of listening servers | |
| 131 _readlist = { } -- array with sockets to read from | |
| 132 _sendlist = { } -- arrary with sockets to write to | |
| 133 _timerlist = { } -- array of timer functions | |
| 134 _socketlist = { } -- key = socket, value = wrapped socket (handlers) | |
| 135 _readtimes = { } -- key = handler, value = timestamp of last data reading | |
| 136 _writetimes = { } -- key = handler, value = timestamp of last data writing/sending | |
| 137 _closelist = { } -- handlers to close | |
| 138 | |
| 139 _readlistlen = 0 -- length of readlist | |
| 140 _sendlistlen = 0 -- length of sendlist | |
| 141 _timerlistlen = 0 -- lenght of timerlist | |
| 142 | |
| 143 _sendtraffic = 0 -- some stats | |
| 144 _readtraffic = 0 | |
| 145 | |
| 146 _selecttimeout = 1 -- timeout of socket.select | |
| 147 _sleeptime = 0 -- time to wait at the end of every loop | |
| 148 | |
| 149 _maxsendlen = 51000 * 1024 -- max len of send buffer | |
| 150 _maxreadlen = 25000 * 1024 -- max len of read buffer | |
| 151 | |
| 152 _checkinterval = 1200000 -- interval in secs to check idle clients | |
| 153 _sendtimeout = 60000 -- allowed send idle time in secs | |
| 154 _readtimeout = 6 * 60 * 60 -- allowed read idle time in secs | |
| 155 | |
| 156 _cleanqueue = false -- clean bufferqueue after using | |
| 157 | |
| 158 _maxclientsperserver = 1000 | |
| 159 | |
| 160 _maxsslhandshake = 30 -- max handshake round-trips | |
| 161 | |
| 162 ----------------------------------// PRIVATE //-- | |
| 163 | |
| 164 wrapserver = function( listeners, socket, ip, serverport, pattern, sslctx, maxconnections ) -- this function wraps a server | |
| 165 | |
| 166 maxconnections = maxconnections or _maxclientsperserver | |
| 167 | |
| 168 local connections = 0 | |
| 169 | |
| 170 local dispatch, disconnect = listeners.onconnect or listeners.onincoming, listeners.ondisconnect | |
| 171 | |
| 172 local accept = socket.accept | |
| 173 | |
| 174 --// public methods of the object //-- | |
| 175 | |
| 176 local handler = { } | |
| 177 | |
| 178 handler.shutdown = function( ) end | |
| 179 | |
| 180 handler.ssl = function( ) | |
| 181 return sslctx ~= nil | |
| 182 end | |
| 183 handler.sslctx = function( ) | |
| 184 return sslctx | |
| 185 end | |
| 186 handler.remove = function( ) | |
| 187 connections = connections - 1 | |
| 188 end | |
| 189 handler.close = function( ) | |
| 190 for _, handler in pairs( _socketlist ) do | |
| 191 if handler.serverport == serverport then | |
| 192 handler.disconnect( handler, "server closed" ) | |
| 193 handler:close( true ) | |
| 194 end | |
| 195 end | |
| 196 socket:close( ) | |
| 197 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) | |
| 198 _readlistlen = removesocket( _readlist, socket, _readlistlen ) | |
| 199 _socketlist[ socket ] = nil | |
| 200 handler = nil | |
| 201 socket = nil | |
| 202 --mem_free( ) | |
| 203 out_put "server.lua: closed server handler and removed sockets from list" | |
| 204 end | |
| 205 handler.ip = function( ) | |
| 206 return ip | |
| 207 end | |
| 208 handler.serverport = function( ) | |
| 209 return serverport | |
| 210 end | |
| 211 handler.socket = function( ) | |
| 212 return socket | |
| 213 end | |
| 214 handler.readbuffer = function( ) | |
| 215 if connections > maxconnections then | |
| 216 out_put( "server.lua: refused new client connection: server full" ) | |
| 217 return false | |
| 218 end | |
| 219 local client, err = accept( socket ) -- try to accept | |
| 220 if client then | |
| 221 local ip, clientport = client:getpeername( ) | |
| 222 client:settimeout( 0 ) | |
| 223 local handler, client, err = wrapconnection( handler, listeners, client, ip, serverport, clientport, pattern, sslctx ) -- wrap new client socket | |
| 224 if err then -- error while wrapping ssl socket | |
| 225 return false | |
| 226 end | |
| 227 connections = connections + 1 | |
| 228 out_put( "server.lua: accepted new client connection from ", tostring(ip), ":", tostring(clientport), " to ", tostring(serverport)) | |
| 229 return dispatch( handler ) | |
| 230 elseif err then -- maybe timeout or something else | |
| 231 out_put( "server.lua: error with new client connection: ", tostring(err) ) | |
| 232 return false | |
| 233 end | |
| 234 end | |
| 235 return handler | |
| 236 end | |
| 237 | |
| 238 wrapconnection = function( server, listeners, socket, ip, serverport, clientport, pattern, sslctx ) -- this function wraps a client to a handler object | |
| 239 | |
| 240 socket:settimeout( 0 ) | |
| 241 | |
| 242 --// local import of socket methods //-- | |
| 243 | |
| 244 local send | |
| 245 local receive | |
| 246 local shutdown | |
| 247 | |
| 248 --// private closures of the object //-- | |
| 249 | |
| 250 local ssl | |
| 251 | |
| 252 local dispatch = listeners.onincoming | |
| 253 local status = listeners.onstatus | |
| 254 local disconnect = listeners.ondisconnect | |
| 255 local drain = listeners.ondrain | |
| 256 | |
| 257 local bufferqueue = { } -- buffer array | |
| 258 local bufferqueuelen = 0 -- end of buffer array | |
| 259 | |
| 260 local toclose | |
| 261 local fatalerror | |
| 262 local needtls | |
| 263 | |
| 264 local bufferlen = 0 | |
| 265 | |
| 266 local noread = false | |
| 267 local nosend = false | |
| 268 | |
| 269 local sendtraffic, readtraffic = 0, 0 | |
| 270 | |
| 271 local maxsendlen = _maxsendlen | |
| 272 local maxreadlen = _maxreadlen | |
| 273 | |
| 274 --// public methods of the object //-- | |
| 275 | |
| 276 local handler = bufferqueue -- saves a table ^_^ | |
| 277 | |
| 278 handler.dispatch = function( ) | |
| 279 return dispatch | |
| 280 end | |
| 281 handler.disconnect = function( ) | |
| 282 return disconnect | |
| 283 end | |
| 284 handler.setlistener = function( self, listeners ) | |
| 285 dispatch = listeners.onincoming | |
| 286 disconnect = listeners.ondisconnect | |
| 287 status = listeners.onstatus | |
| 288 drain = listeners.ondrain | |
| 289 end | |
| 290 handler.getstats = function( ) | |
| 291 return readtraffic, sendtraffic | |
| 292 end | |
| 293 handler.ssl = function( ) | |
| 294 return ssl | |
| 295 end | |
| 296 handler.sslctx = function ( ) | |
| 297 return sslctx | |
| 298 end | |
| 299 handler.send = function( _, data, i, j ) | |
| 300 return send( socket, data, i, j ) | |
| 301 end | |
| 302 handler.receive = function( pattern, prefix ) | |
| 303 return receive( socket, pattern, prefix ) | |
| 304 end | |
| 305 handler.shutdown = function( pattern ) | |
| 306 return shutdown( socket, pattern ) | |
| 307 end | |
| 308 handler.setoption = function (self, option, value) | |
| 309 if socket.setoption then | |
| 310 return socket:setoption(option, value); | |
| 311 end | |
| 312 return false, "setoption not implemented"; | |
| 313 end | |
| 314 handler.close = function( self, forced ) | |
| 315 if not handler then return true; end | |
| 316 _readlistlen = removesocket( _readlist, socket, _readlistlen ) | |
| 317 _readtimes[ handler ] = nil | |
| 318 if bufferqueuelen ~= 0 then | |
| 319 if not ( forced or fatalerror ) then | |
| 320 handler.sendbuffer( ) | |
| 321 if bufferqueuelen ~= 0 then -- try again... | |
| 322 if handler then | |
| 323 handler.write = nil -- ... but no further writing allowed | |
| 324 end | |
| 325 toclose = true | |
| 326 return false | |
| 327 end | |
| 328 else | |
| 329 send( socket, table_concat( bufferqueue, "", 1, bufferqueuelen ), 1, bufferlen ) -- forced send | |
| 330 end | |
| 331 end | |
| 332 if socket then | |
| 333 _ = shutdown and shutdown( socket ) | |
| 334 socket:close( ) | |
| 335 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) | |
| 336 _socketlist[ socket ] = nil | |
| 337 socket = nil | |
| 338 else | |
| 339 out_put "server.lua: socket already closed" | |
| 340 end | |
| 341 if handler then | |
| 342 _writetimes[ handler ] = nil | |
| 343 _closelist[ handler ] = nil | |
| 344 handler = nil | |
| 345 end | |
| 346 if server then | |
| 347 server.remove( ) | |
| 348 end | |
| 349 out_put "server.lua: closed client handler and removed socket from list" | |
| 350 return true | |
| 351 end | |
| 352 handler.ip = function( ) | |
| 353 return ip | |
| 354 end | |
| 355 handler.serverport = function( ) | |
| 356 return serverport | |
| 357 end | |
| 358 handler.clientport = function( ) | |
| 359 return clientport | |
| 360 end | |
| 361 local write = function( self, data ) | |
| 362 bufferlen = bufferlen + string_len( data ) | |
| 363 if bufferlen > maxsendlen then | |
| 364 _closelist[ handler ] = "send buffer exceeded" -- cannot close the client at the moment, have to wait to the end of the cycle | |
| 365 handler.write = idfalse -- dont write anymore | |
| 366 return false | |
| 367 elseif socket and not _sendlist[ socket ] then | |
| 368 _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) | |
| 369 end | |
| 370 bufferqueuelen = bufferqueuelen + 1 | |
| 371 bufferqueue[ bufferqueuelen ] = data | |
| 372 if handler then | |
| 373 _writetimes[ handler ] = _writetimes[ handler ] or _currenttime | |
| 374 end | |
| 375 return true | |
| 376 end | |
| 377 handler.write = write | |
| 378 handler.bufferqueue = function( self ) | |
| 379 return bufferqueue | |
| 380 end | |
| 381 handler.socket = function( self ) | |
| 382 return socket | |
| 383 end | |
| 384 handler.set_mode = function( self, new ) | |
| 385 pattern = new or pattern | |
| 386 return pattern | |
| 387 end | |
| 388 handler.set_send = function ( self, newsend ) | |
| 389 send = newsend or send | |
| 390 return send | |
| 391 end | |
| 392 handler.bufferlen = function( self, readlen, sendlen ) | |
| 393 maxsendlen = sendlen or maxsendlen | |
| 394 maxreadlen = readlen or maxreadlen | |
| 395 return bufferlen, maxreadlen, maxsendlen | |
| 396 end | |
| 397 --TODO: Deprecate | |
| 398 handler.lock_read = function (self, switch) | |
| 399 if switch == true then | |
| 400 local tmp = _readlistlen | |
| 401 _readlistlen = removesocket( _readlist, socket, _readlistlen ) | |
| 402 _readtimes[ handler ] = nil | |
| 403 if _readlistlen ~= tmp then | |
| 404 noread = true | |
| 405 end | |
| 406 elseif switch == false then | |
| 407 if noread then | |
| 408 noread = false | |
| 409 _readlistlen = addsocket(_readlist, socket, _readlistlen) | |
| 410 _readtimes[ handler ] = _currenttime | |
| 411 end | |
| 412 end | |
| 413 return noread | |
| 414 end | |
| 415 handler.pause = function (self) | |
| 416 return self:lock_read(true); | |
| 417 end | |
| 418 handler.resume = function (self) | |
| 419 return self:lock_read(false); | |
| 420 end | |
| 421 handler.lock = function( self, switch ) | |
| 422 handler.lock_read (switch) | |
| 423 if switch == true then | |
| 424 handler.write = idfalse | |
| 425 local tmp = _sendlistlen | |
| 426 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) | |
| 427 _writetimes[ handler ] = nil | |
| 428 if _sendlistlen ~= tmp then | |
| 429 nosend = true | |
| 430 end | |
| 431 elseif switch == false then | |
| 432 handler.write = write | |
| 433 if nosend then | |
| 434 nosend = false | |
| 435 write( "" ) | |
| 436 end | |
| 437 end | |
| 438 return noread, nosend | |
| 439 end | |
| 440 local _readbuffer = function( ) -- this function reads data | |
| 441 local buffer, err, part = receive( socket, pattern ) -- receive buffer with "pattern" | |
| 442 if not err or (err == "wantread" or err == "timeout") then -- received something | |
| 443 local buffer = buffer or part or "" | |
| 444 local len = string_len( buffer ) | |
| 445 if len > maxreadlen then | |
| 446 disconnect( handler, "receive buffer exceeded" ) | |
| 447 handler:close( true ) | |
| 448 return false | |
| 449 end | |
| 450 local count = len * STAT_UNIT | |
| 451 readtraffic = readtraffic + count | |
| 452 _readtraffic = _readtraffic + count | |
| 453 _readtimes[ handler ] = _currenttime | |
| 454 --out_put( "server.lua: read data '", buffer:gsub("[^%w%p ]", "."), "', error: ", err ) | |
| 455 return dispatch( handler, buffer, err ) | |
| 456 else -- connections was closed or fatal error | |
| 457 out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " read error: ", tostring(err) ) | |
| 458 fatalerror = true | |
| 459 disconnect( handler, err ) | |
| 460 _ = handler and handler:close( ) | |
| 461 return false | |
| 462 end | |
| 463 end | |
| 464 local _sendbuffer = function( ) -- this function sends data | |
| 465 local succ, err, byte, buffer, count; | |
| 466 local count; | |
| 467 if socket then | |
| 468 buffer = table_concat( bufferqueue, "", 1, bufferqueuelen ) | |
| 469 succ, err, byte = send( socket, buffer, 1, bufferlen ) | |
| 470 count = ( succ or byte or 0 ) * STAT_UNIT | |
| 471 sendtraffic = sendtraffic + count | |
| 472 _sendtraffic = _sendtraffic + count | |
| 473 _ = _cleanqueue and clean( bufferqueue ) | |
| 474 --out_put( "server.lua: sended '", buffer, "', bytes: ", tostring(succ), ", error: ", tostring(err), ", part: ", tostring(byte), ", to: ", tostring(ip), ":", tostring(clientport) ) | |
| 475 else | |
| 476 succ, err, count = false, "closed", 0; | |
| 477 end | |
| 478 if succ then -- sending succesful | |
| 479 bufferqueuelen = 0 | |
| 480 bufferlen = 0 | |
| 481 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) -- delete socket from writelist | |
| 482 _writetimes[ handler ] = nil | |
| 483 if drain then | |
| 484 drain(handler) | |
| 485 end | |
| 486 _ = needtls and handler:starttls(nil) | |
| 487 _ = toclose and handler:close( ) | |
| 488 return true | |
| 489 elseif byte and ( err == "timeout" or err == "wantwrite" ) then -- want write | |
| 490 buffer = string_sub( buffer, byte + 1, bufferlen ) -- new buffer | |
| 491 bufferqueue[ 1 ] = buffer -- insert new buffer in queue | |
| 492 bufferqueuelen = 1 | |
| 493 bufferlen = bufferlen - byte | |
| 494 _writetimes[ handler ] = _currenttime | |
| 495 return true | |
| 496 else -- connection was closed during sending or fatal error | |
| 497 out_put( "server.lua: client ", tostring(ip), ":", tostring(clientport), " write error: ", tostring(err) ) | |
| 498 fatalerror = true | |
| 499 disconnect( handler, err ) | |
| 500 _ = handler and handler:close( ) | |
| 501 return false | |
| 502 end | |
| 503 end | |
| 504 | |
| 505 -- Set the sslctx | |
| 506 local handshake; | |
| 507 function handler.set_sslctx(self, new_sslctx) | |
| 508 ssl = true | |
| 509 sslctx = new_sslctx; | |
| 510 local wrote | |
| 511 local read | |
| 512 handshake = coroutine_wrap( function( client ) -- create handshake coroutine | |
| 513 local err | |
| 514 for i = 1, _maxsslhandshake do | |
| 515 _sendlistlen = ( wrote and removesocket( _sendlist, client, _sendlistlen ) ) or _sendlistlen | |
| 516 _readlistlen = ( read and removesocket( _readlist, client, _readlistlen ) ) or _readlistlen | |
| 517 read, wrote = nil, nil | |
| 518 _, err = client:dohandshake( ) | |
| 519 if not err then | |
| 520 out_put( "server.lua: ssl handshake done" ) | |
| 521 handler.readbuffer = _readbuffer -- when handshake is done, replace the handshake function with regular functions | |
| 522 handler.sendbuffer = _sendbuffer | |
| 523 _ = status and status( handler, "ssl-handshake-complete" ) | |
| 524 _readlistlen = addsocket(_readlist, client, _readlistlen) | |
| 525 return true | |
| 526 else | |
| 527 out_put( "server.lua: error during ssl handshake: ", tostring(err) ) | |
| 528 if err == "wantwrite" and not wrote then | |
| 529 _sendlistlen = addsocket(_sendlist, client, _sendlistlen) | |
| 530 wrote = true | |
| 531 elseif err == "wantread" and not read then | |
| 532 _readlistlen = addsocket(_readlist, client, _readlistlen) | |
| 533 read = true | |
| 534 else | |
| 535 break; | |
| 536 end | |
| 537 --coroutine_yield( handler, nil, err ) -- handshake not finished | |
| 538 coroutine_yield( ) | |
| 539 end | |
| 540 end | |
| 541 disconnect( handler, "ssl handshake failed" ) | |
| 542 _ = handler and handler:close( true ) -- forced disconnect | |
| 543 return false -- handshake failed | |
| 544 end | |
| 545 ) | |
| 546 end | |
| 547 if luasec then | |
| 548 if sslctx then -- ssl? | |
| 549 handler:set_sslctx(sslctx); | |
| 550 out_put("server.lua: ", "starting ssl handshake") | |
| 551 local err | |
| 552 socket, err = ssl_wrap( socket, sslctx ) -- wrap socket | |
| 553 if err then | |
| 554 out_put( "server.lua: ssl error: ", tostring(err) ) | |
| 555 --mem_free( ) | |
| 556 return nil, nil, err -- fatal error | |
| 557 end | |
| 558 socket:settimeout( 0 ) | |
| 559 handler.readbuffer = handshake | |
| 560 handler.sendbuffer = handshake | |
| 561 handshake( socket ) -- do handshake | |
| 562 if not socket then | |
| 563 return nil, nil, "ssl handshake failed"; | |
| 564 end | |
| 565 else | |
| 566 local sslctx; | |
| 567 handler.starttls = function( self, _sslctx) | |
| 568 if _sslctx then | |
| 569 sslctx = _sslctx; | |
| 570 handler:set_sslctx(sslctx); | |
| 571 end | |
| 572 if bufferqueuelen > 0 then | |
| 573 out_put "server.lua: we need to do tls, but delaying until send buffer empty" | |
| 574 needtls = true | |
| 575 return | |
| 576 end | |
| 577 out_put( "server.lua: attempting to start tls on " .. tostring( socket ) ) | |
| 578 local oldsocket, err = socket | |
| 579 socket, err = ssl_wrap( socket, sslctx ) -- wrap socket | |
| 580 --out_put( "server.lua: sslwrapped socket is " .. tostring( socket ) ) | |
| 581 if err then | |
| 582 out_put( "server.lua: error while starting tls on client: ", tostring(err) ) | |
| 583 return nil, err -- fatal error | |
| 584 end | |
| 585 | |
| 586 socket:settimeout( 0 ) | |
| 587 | |
| 588 -- add the new socket to our system | |
| 589 | |
| 590 send = socket.send | |
| 591 receive = socket.receive | |
| 592 shutdown = id | |
| 593 | |
| 594 _socketlist[ socket ] = handler | |
| 595 _readlistlen = addsocket(_readlist, socket, _readlistlen) | |
| 596 | |
| 597 -- remove traces of the old socket | |
| 598 | |
| 599 _readlistlen = removesocket( _readlist, oldsocket, _readlistlen ) | |
| 600 _sendlistlen = removesocket( _sendlist, oldsocket, _sendlistlen ) | |
| 601 _socketlist[ oldsocket ] = nil | |
| 602 | |
| 603 handler.starttls = nil | |
| 604 needtls = nil | |
| 605 | |
| 606 -- Secure now | |
| 607 ssl = true | |
| 608 | |
| 609 handler.readbuffer = handshake | |
| 610 handler.sendbuffer = handshake | |
| 611 handshake( socket ) -- do handshake | |
| 612 end | |
| 613 handler.readbuffer = _readbuffer | |
| 614 handler.sendbuffer = _sendbuffer | |
| 615 end | |
| 616 else | |
| 617 handler.readbuffer = _readbuffer | |
| 618 handler.sendbuffer = _sendbuffer | |
| 619 end | |
| 620 send = socket.send | |
| 621 receive = socket.receive | |
| 622 shutdown = ( ssl and id ) or socket.shutdown | |
| 623 | |
| 624 _socketlist[ socket ] = handler | |
| 625 _readlistlen = addsocket(_readlist, socket, _readlistlen) | |
| 626 return handler, socket | |
| 627 end | |
| 628 | |
| 629 id = function( ) | |
| 630 end | |
| 631 | |
| 632 idfalse = function( ) | |
| 633 return false | |
| 634 end | |
| 635 | |
| 636 addsocket = function( list, socket, len ) | |
| 637 if not list[ socket ] then | |
| 638 len = len + 1 | |
| 639 list[ len ] = socket | |
| 640 list[ socket ] = len | |
| 641 end | |
| 642 return len; | |
| 643 end | |
| 644 | |
| 645 removesocket = function( list, socket, len ) -- this function removes sockets from a list ( copied from copas ) | |
| 646 local pos = list[ socket ] | |
| 647 if pos then | |
| 648 list[ socket ] = nil | |
| 649 local last = list[ len ] | |
| 650 list[ len ] = nil | |
| 651 if last ~= socket then | |
| 652 list[ last ] = pos | |
| 653 list[ pos ] = last | |
| 654 end | |
| 655 return len - 1 | |
| 656 end | |
| 657 return len | |
| 658 end | |
| 659 | |
| 660 closesocket = function( socket ) | |
| 661 _sendlistlen = removesocket( _sendlist, socket, _sendlistlen ) | |
| 662 _readlistlen = removesocket( _readlist, socket, _readlistlen ) | |
| 663 _socketlist[ socket ] = nil | |
| 664 socket:close( ) | |
| 665 --mem_free( ) | |
| 666 end | |
| 667 | |
| 668 local function link(sender, receiver, buffersize) | |
| 669 sender:set_mode(buffersize); | |
| 670 local sender_locked; | |
| 671 local _sendbuffer = receiver.sendbuffer; | |
| 672 function receiver.sendbuffer() | |
| 673 _sendbuffer(); | |
| 674 if sender_locked and receiver.bufferlen() < buffersize then | |
| 675 sender:lock_read(false); -- Unlock now | |
| 676 sender_locked = nil; | |
| 677 end | |
| 678 end | |
| 679 | |
| 680 local _readbuffer = sender.readbuffer; | |
| 681 function sender.readbuffer() | |
| 682 _readbuffer(); | |
| 683 if not sender_locked and receiver.bufferlen() >= buffersize then | |
| 684 sender_locked = true; | |
| 685 sender:lock_read(true); | |
| 686 end | |
| 687 end | |
| 688 end | |
| 689 | |
| 690 ----------------------------------// PUBLIC //-- | |
| 691 | |
| 692 addserver = function( addr, port, listeners, pattern, sslctx ) -- this function provides a way for other scripts to reg a server | |
| 693 local err | |
| 694 if type( listeners ) ~= "table" then | |
| 695 err = "invalid listener table" | |
| 696 end | |
| 697 if type( port ) ~= "number" or not ( port >= 0 and port <= 65535 ) then | |
| 698 err = "invalid port" | |
| 699 elseif _server[ port ] then | |
| 700 err = "listeners on port '" .. port .. "' already exist" | |
| 701 elseif sslctx and not luasec then | |
| 702 err = "luasec not found" | |
| 703 end | |
| 704 if err then | |
| 705 out_error( "server.lua, port ", port, ": ", err ) | |
| 706 return nil, err | |
| 707 end | |
| 708 addr = addr or "*" | |
| 709 local server, err = socket_bind( addr, port ) | |
| 710 if err then | |
| 711 out_error( "server.lua, port ", port, ": ", err ) | |
| 712 return nil, err | |
| 713 end | |
| 714 local handler, err = wrapserver( listeners, server, addr, port, pattern, sslctx, _maxclientsperserver ) -- wrap new server socket | |
| 715 if not handler then | |
| 716 server:close( ) | |
| 717 return nil, err | |
| 718 end | |
| 719 server:settimeout( 0 ) | |
| 720 _readlistlen = addsocket(_readlist, server, _readlistlen) | |
| 721 _server[ port ] = handler | |
| 722 _socketlist[ server ] = handler | |
| 723 out_put( "server.lua: new "..(sslctx and "ssl " or "").."server listener on '", addr, ":", port, "'" ) | |
| 724 return handler | |
| 725 end | |
| 726 | |
| 727 getserver = function ( port ) | |
| 728 return _server[ port ]; | |
| 729 end | |
| 730 | |
| 731 removeserver = function( port ) | |
| 732 local handler = _server[ port ] | |
| 733 if not handler then | |
| 734 return nil, "no server found on port '" .. tostring( port ) .. "'" | |
| 735 end | |
| 736 handler:close( ) | |
| 737 _server[ port ] = nil | |
| 738 return true | |
| 739 end | |
| 740 | |
| 741 closeall = function( ) | |
| 742 for _, handler in pairs( _socketlist ) do | |
| 743 handler:close( ) | |
| 744 _socketlist[ _ ] = nil | |
| 745 end | |
| 746 _readlistlen = 0 | |
| 747 _sendlistlen = 0 | |
| 748 _timerlistlen = 0 | |
| 749 _server = { } | |
| 750 _readlist = { } | |
| 751 _sendlist = { } | |
| 752 _timerlist = { } | |
| 753 _socketlist = { } | |
| 754 --mem_free( ) | |
| 755 end | |
| 756 | |
| 757 getsettings = function( ) | |
| 758 return _selecttimeout, _sleeptime, _maxsendlen, _maxreadlen, _checkinterval, _sendtimeout, _readtimeout, _cleanqueue, _maxclientsperserver, _maxsslhandshake | |
| 759 end | |
| 760 | |
| 761 changesettings = function( new ) | |
| 762 if type( new ) ~= "table" then | |
| 763 return nil, "invalid settings table" | |
| 764 end | |
| 765 _selecttimeout = tonumber( new.timeout ) or _selecttimeout | |
| 766 _sleeptime = tonumber( new.sleeptime ) or _sleeptime | |
| 767 _maxsendlen = tonumber( new.maxsendlen ) or _maxsendlen | |
| 768 _maxreadlen = tonumber( new.maxreadlen ) or _maxreadlen | |
| 769 _checkinterval = tonumber( new.checkinterval ) or _checkinterval | |
| 770 _sendtimeout = tonumber( new.sendtimeout ) or _sendtimeout | |
| 771 _readtimeout = tonumber( new.readtimeout ) or _readtimeout | |
| 772 _cleanqueue = new.cleanqueue | |
| 773 _maxclientsperserver = new._maxclientsperserver or _maxclientsperserver | |
| 774 _maxsslhandshake = new._maxsslhandshake or _maxsslhandshake | |
| 775 return true | |
| 776 end | |
| 777 | |
| 778 addtimer = function( listener ) | |
| 779 if type( listener ) ~= "function" then | |
| 780 return nil, "invalid listener function" | |
| 781 end | |
| 782 _timerlistlen = _timerlistlen + 1 | |
| 783 _timerlist[ _timerlistlen ] = listener | |
| 784 return true | |
| 785 end | |
| 786 | |
| 787 stats = function( ) | |
| 788 return _readtraffic, _sendtraffic, _readlistlen, _sendlistlen, _timerlistlen | |
| 789 end | |
| 790 | |
| 791 local dontstop = true; -- thinking about tomorrow, ... | |
| 792 | |
| 793 setquitting = function (quit) | |
| 794 dontstop = not quit; | |
| 795 return; | |
| 796 end | |
| 797 | |
| 798 loop = function( ) -- this is the main loop of the program | |
| 799 while dontstop do | |
| 800 local read, write, err = socket_select( _readlist, _sendlist, _selecttimeout ) | |
| 801 for i, socket in ipairs( write ) do -- send data waiting in writequeues | |
| 802 local handler = _socketlist[ socket ] | |
| 803 if handler then | |
| 804 handler.sendbuffer( ) | |
| 805 else | |
| 806 closesocket( socket ) | |
| 807 out_put "server.lua: found no handler and closed socket (writelist)" -- this should not happen | |
| 808 end | |
| 809 end | |
| 810 for i, socket in ipairs( read ) do -- receive data | |
| 811 local handler = _socketlist[ socket ] | |
| 812 if handler then | |
| 813 handler.readbuffer( ) | |
| 814 else | |
| 815 closesocket( socket ) | |
| 816 out_put "server.lua: found no handler and closed socket (readlist)" -- this can happen | |
| 817 end | |
| 818 end | |
| 819 for handler, err in pairs( _closelist ) do | |
| 820 handler.disconnect( )( handler, err ) | |
| 821 handler:close( true ) -- forced disconnect | |
| 822 end | |
| 823 clean( _closelist ) | |
| 824 _currenttime = os_time( ) | |
| 825 if os_difftime( _currenttime - _timer ) >= 1 then | |
| 826 for i = 1, _timerlistlen do | |
| 827 _timerlist[ i ]( _currenttime ) -- fire timers | |
| 828 end | |
| 829 _timer = _currenttime | |
| 830 end | |
| 831 socket_sleep( _sleeptime ) -- wait some time | |
| 832 --collectgarbage( ) | |
| 833 end | |
| 834 return "quitting" | |
| 835 end | |
| 836 | |
| 837 local function get_backend() | |
| 838 return "select"; | |
| 839 end | |
| 840 | |
| 841 --// EXPERIMENTAL //-- | |
| 842 | |
| 843 local wrapclient = function( socket, ip, serverport, listeners, pattern, sslctx ) | |
| 844 local handler = wrapconnection( nil, listeners, socket, ip, serverport, "clientport", pattern, sslctx ) | |
| 845 _socketlist[ socket ] = handler | |
| 846 _sendlistlen = addsocket(_sendlist, socket, _sendlistlen) | |
| 847 if listeners.onconnect then | |
| 848 -- When socket is writeable, call onconnect | |
| 849 local _sendbuffer = handler.sendbuffer; | |
| 850 handler.sendbuffer = function () | |
| 851 listeners.onconnect(handler); | |
| 852 handler.sendbuffer = _sendbuffer; | |
| 853 -- If there was data with the incoming packet, handle it now. | |
| 854 if #handler:bufferqueue() > 0 then | |
| 855 return _sendbuffer(); | |
| 856 end | |
| 857 end | |
| 858 end | |
| 859 return handler, socket | |
| 860 end | |
| 861 | |
| 862 local addclient = function( address, port, listeners, pattern, sslctx ) | |
| 863 local client, err = luasocket.tcp( ) | |
| 864 if err then | |
| 865 return nil, err | |
| 866 end | |
| 867 client:settimeout( 0 ) | |
| 868 _, err = client:connect( address, port ) | |
| 869 if err then -- try again | |
| 870 local handler = wrapclient( client, address, port, listeners ) | |
| 871 else | |
| 872 wrapconnection( nil, listeners, client, address, port, "clientport", pattern, sslctx ) | |
| 873 end | |
| 874 end | |
| 875 | |
| 876 --// EXPERIMENTAL //-- | |
| 877 | |
| 878 ----------------------------------// BEGIN //-- | |
| 879 | |
| 880 use "setmetatable" ( _socketlist, { __mode = "k" } ) | |
| 881 use "setmetatable" ( _readtimes, { __mode = "k" } ) | |
| 882 use "setmetatable" ( _writetimes, { __mode = "k" } ) | |
| 883 | |
| 884 _timer = os_time( ) | |
| 885 _starttime = os_time( ) | |
| 886 | |
| 887 addtimer( function( ) | |
| 888 local difftime = os_difftime( _currenttime - _starttime ) | |
| 889 if difftime > _checkinterval then | |
| 890 _starttime = _currenttime | |
| 891 for handler, timestamp in pairs( _writetimes ) do | |
| 892 if os_difftime( _currenttime - timestamp ) > _sendtimeout then | |
| 893 --_writetimes[ handler ] = nil | |
| 894 handler.disconnect( )( handler, "send timeout" ) | |
| 895 handler:close( true ) -- forced disconnect | |
| 896 end | |
| 897 end | |
| 898 for handler, timestamp in pairs( _readtimes ) do | |
| 899 if os_difftime( _currenttime - timestamp ) > _readtimeout then | |
| 900 --_readtimes[ handler ] = nil | |
| 901 handler.disconnect( )( handler, "read timeout" ) | |
| 902 handler:close( ) -- forced disconnect? | |
| 903 end | |
| 904 end | |
| 905 end | |
| 906 end | |
| 907 ) | |
| 908 | |
| 909 local function setlogger(new_logger) | |
| 910 local old_logger = log; | |
| 911 if new_logger then | |
| 912 log = new_logger; | |
| 913 end | |
| 914 return old_logger; | |
| 915 end | |
| 916 | |
| 917 ----------------------------------// PUBLIC INTERFACE //-- | |
| 918 | |
| 919 return { | |
| 920 | |
| 921 addclient = addclient, | |
| 922 wrapclient = wrapclient, | |
| 923 | |
| 924 loop = loop, | |
| 925 link = link, | |
| 926 stats = stats, | |
| 927 closeall = closeall, | |
| 928 addtimer = addtimer, | |
| 929 addserver = addserver, | |
| 930 getserver = getserver, | |
| 931 setlogger = setlogger, | |
| 932 getsettings = getsettings, | |
| 933 setquitting = setquitting, | |
| 934 removeserver = removeserver, | |
| 935 get_backend = get_backend, | |
| 936 changesettings = changesettings, | |
| 937 } |
