prosody
39789f1669cb
net/server_event.lua

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net/server_event.lua @ 6861:39789f1669cb

Merge 0.10->trunk
author Kim Alvefur <zash@zash.se>
date Fri, 25 Sep 2015 18:03:44 +0200
parent 6820:40d50c239564
parent 6860:153a2e49c4f7
child 6862:7a81fb23de5d
comparison
equal deleted inserted replaced
6847:c314e9142e9d 6861:39789f1669cb
9 -- to do some of the above, use timeout events or something what will called from outside 9 -- to do some of the above, use timeout events or something what will called from outside
10 -- dont let garbagecollect eventcallbacks, as long they are running 10 -- dont let garbagecollect eventcallbacks, as long they are running
11 -- when using luasec, there are 4 cases of timeout errors: wantread or wantwrite during reading or writing 11 -- when using luasec, there are 4 cases of timeout errors: wantread or wantwrite during reading or writing
12 12
13 --]] 13 --]]
14 -- luacheck: ignore 212/self 431/err 211/ret
14 15
15 local SCRIPT_NAME = "server_event.lua" 16 local SCRIPT_NAME = "server_event.lua"
16 local SCRIPT_VERSION = "0.05" 17 local SCRIPT_VERSION = "0.05"
17 local SCRIPT_AUTHOR = "blastbeat" 18 local SCRIPT_AUTHOR = "blastbeat"
18 local LAST_MODIFIED = "2009/11/20" 19 local LAST_MODIFIED = "2009/11/20"
30 CONNECT_TIMEOUT = 20, -- timeout in seconds for connection attempts 31 CONNECT_TIMEOUT = 20, -- timeout in seconds for connection attempts
31 CLEAR_DELAY = 5, -- seconds to wait for clearing interface list (and calling ondisconnect listeners) 32 CLEAR_DELAY = 5, -- seconds to wait for clearing interface list (and calling ondisconnect listeners)
32 DEBUG = true, -- show debug messages 33 DEBUG = true, -- show debug messages
33 } 34 }
34 35
35 local function use(x) return rawget(_G, x); end 36 local pairs = pairs
36 local ipairs = use "ipairs" 37 local select = select
37 local string = use "string" 38 local require = require
38 local select = use "select" 39 local tostring = tostring
39 local require = use "require" 40 local setmetatable = setmetatable
40 local tostring = use "tostring"
41 local coroutine = use "coroutine"
42 local setmetatable = use "setmetatable"
43 41
44 local t_insert = table.insert 42 local t_insert = table.insert
45 local t_concat = table.concat 43 local t_concat = table.concat
44 local s_sub = string.sub
45
46 local coroutine_wrap = coroutine.wrap
47 local coroutine_yield = coroutine.yield
46 48
47 local has_luasec, ssl = pcall ( require , "ssl" ) 49 local has_luasec, ssl = pcall ( require , "ssl" )
48 local socket = use "socket" or require "socket" 50 local socket = require "socket"
51 local levent = require "luaevent.core"
52
53 local socket_gettime = socket.gettime
49 local getaddrinfo = socket.dns.getaddrinfo 54 local getaddrinfo = socket.dns.getaddrinfo
50 55
51 local log = require ("util.logger").init("socket") 56 local log = require ("util.logger").init("socket")
52 57
53 local function debug(...) 58 local function debug(...)
54 return log("debug", ("%s "):rep(select('#', ...)), ...) 59 return log("debug", ("%s "):rep(select('#', ...)), ...)
55 end 60 end
56 local vdebug = debug; 61 -- local vdebug = debug;
57 62
58 local bitor = ( function( ) -- thx Rici Lake 63 local bitor = ( function( ) -- thx Rici Lake
59 local hasbit = function( x, p ) 64 local hasbit = function( x, p )
60 return x % ( p + p ) >= p 65 return x % ( p + p ) >= p
61 end 66 end
71 end 76 end
72 return z 77 return z
73 end 78 end
74 end )( ) 79 end )( )
75 80
76 local event = require "luaevent.core" 81 local base = levent.new( )
77 local base = event.new( ) 82 local addevent = base.addevent
78 local EV_READ = event.EV_READ 83 local EV_READ = levent.EV_READ
79 local EV_WRITE = event.EV_WRITE 84 local EV_WRITE = levent.EV_WRITE
80 local EV_TIMEOUT = event.EV_TIMEOUT 85 local EV_TIMEOUT = levent.EV_TIMEOUT
81 local EV_SIGNAL = event.EV_SIGNAL 86 local EV_SIGNAL = levent.EV_SIGNAL
82 87
83 local EV_READWRITE = bitor( EV_READ, EV_WRITE ) 88 local EV_READWRITE = bitor( EV_READ, EV_WRITE )
84 89
85 local interfacelist = ( function( ) -- holds the interfaces for sockets 90 local interfacelist = { }
86 local array = { } 91
87 local len = 0 92 -- Client interface methods
88 return function( method, arg ) 93 local interface_mt = {}; interface_mt.__index = interface_mt;
89 if "add" == method then 94
90 len = len + 1 95 -- Private methods
91 array[ len ] = arg 96 function interface_mt:_close()
92 arg:_position( len ) 97 return self:_destroy();
93 return len 98 end
94 elseif "delete" == method then 99
95 if len <= 0 then 100 function interface_mt:_start_connection(plainssl) -- called from wrapclient
96 return nil, "array is already empty" 101 local callback = function( event )
97 end 102 if EV_TIMEOUT == event then -- timeout during connection
98 local position = arg:_position() -- get position in array 103 self.fatalerror = "connection timeout"
99 if position ~= len then 104 self:ontimeout() -- call timeout listener
100 local interface = array[ len ] -- get last interface 105 self:_close()
101 array[ position ] = interface -- copy it into free position 106 debug( "new connection failed. id:", self.id, "error:", self.fatalerror )
102 array[ len ] = nil -- free last position
103 interface:_position( position ) -- set new position in array
104 else -- free last position
105 array[ len ] = nil
106 end
107 len = len - 1
108 return len
109 else 107 else
110 return array 108 if plainssl and has_luasec then -- start ssl session
111 end 109 self:starttls(self._sslctx, true)
112 end 110 else -- normal connection
113 end )( ) 111 self:_start_session(true)
114 112 end
115 -- Client interface methods 113 debug( "new connection established. id:", self.id )
116 local interface_mt 114 end
117 do 115 self.eventconnect = nil
118 interface_mt = {}; interface_mt.__index = interface_mt; 116 return -1
119 117 end
120 local addevent = base.addevent 118 self.eventconnect = addevent( base, self.conn, EV_WRITE, callback, cfg.CONNECT_TIMEOUT )
121 local coroutine_wrap, coroutine_yield = coroutine.wrap,coroutine.yield 119 return true
122 120 end
123 -- Private methods 121 function interface_mt:_start_session(call_onconnect) -- new session, for example after startssl
124 function interface_mt:_position(new_position) 122 if self.type == "client" then
125 self.position = new_position or self.position 123 local callback = function( )
126 return self.position; 124 self:_lock( false, false, false )
127 end 125 --vdebug( "start listening on client socket with id:", self.id )
128 function interface_mt:_close() 126 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
129 return self:_destroy(); 127 if call_onconnect then
130 end 128 self:onconnect()
131 129 end
132 function interface_mt:_start_connection(plainssl) -- called from wrapclient 130 self.eventsession = nil
133 local callback = function( event ) 131 return -1
134 if EV_TIMEOUT == event then -- timeout during connection 132 end
135 self.fatalerror = "connection timeout" 133 self.eventsession = addevent( base, nil, EV_TIMEOUT, callback, 0 )
136 self:ontimeout() -- call timeout listener 134 else
137 self:_close() 135 self:_lock( false )
138 debug( "new connection failed. id:", self.id, "error:", self.fatalerror ) 136 --vdebug( "start listening on server socket with id:", self.id )
137 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback ) -- register callback
138 end
139 return true
140 end
141 function interface_mt:_start_ssl(call_onconnect) -- old socket will be destroyed, therefore we have to close read/write events first
142 --vdebug( "starting ssl session with client id:", self.id )
143 local _
144 _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks!
145 _ = self.eventwrite and self.eventwrite:close( )
146 self.eventread, self.eventwrite = nil, nil
147 local err
148 self.conn, err = ssl.wrap( self.conn, self._sslctx )
149 if err then
150 self.fatalerror = err
151 self.conn = nil -- cannot be used anymore
152 if call_onconnect then
153 self.ondisconnect = nil -- dont call this when client isnt really connected
154 end
155 self:_close()
156 debug( "fatal error while ssl wrapping:", err )
157 return false
158 end
159 self.conn:settimeout( 0 ) -- set non blocking
160 local handshakecallback = coroutine_wrap(function( event )
161 local _, err
162 local attempt = 0
163 local maxattempt = cfg.MAX_HANDSHAKE_ATTEMPTS
164 while attempt < maxattempt do -- no endless loop
165 attempt = attempt + 1
166 debug( "ssl handshake of client with id:"..tostring(self)..", attempt:"..attempt )
167 if attempt > maxattempt then
168 self.fatalerror = "max handshake attempts exceeded"
169 elseif EV_TIMEOUT == event then
170 self.fatalerror = "timeout during handshake"
171 else
172 _, err = self.conn:dohandshake( )
173 if not err then
174 self:_lock( false, false, false ) -- unlock the interface; sending, closing etc allowed
175 self.send = self.conn.send -- caching table lookups with new client object
176 self.receive = self.conn.receive
177 if not call_onconnect then -- trigger listener
178 self:onstatus("ssl-handshake-complete");
179 end
180 self:_start_session( call_onconnect )
181 debug( "ssl handshake done" )
182 self.eventhandshake = nil
183 return -1
184 end
185 if err == "wantwrite" then
186 event = EV_WRITE
187 elseif err == "wantread" then
188 event = EV_READ
139 else 189 else
140 if plainssl and has_luasec then -- start ssl session 190 debug( "ssl handshake error:", err )
141 self:starttls(self._sslctx, true) 191 self.fatalerror = err
142 else -- normal connection
143 self:_start_session(true)
144 end
145 debug( "new connection established. id:", self.id )
146 end 192 end
147 self.eventconnect = nil 193 end
148 return -1 194 if self.fatalerror then
149 end
150 self.eventconnect = addevent( base, self.conn, EV_WRITE, callback, cfg.CONNECT_TIMEOUT )
151 return true
152 end
153 function interface_mt:_start_session(call_onconnect) -- new session, for example after startssl
154 if self.type == "client" then
155 local callback = function( )
156 self:_lock( false, false, false )
157 --vdebug( "start listening on client socket with id:", self.id )
158 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
159 if call_onconnect then
160 self:onconnect()
161 end
162 self.eventsession = nil
163 return -1
164 end
165 self.eventsession = addevent( base, nil, EV_TIMEOUT, callback, 0 )
166 else
167 self:_lock( false )
168 --vdebug( "start listening on server socket with id:", self.id )
169 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback ) -- register callback
170 end
171 return true
172 end
173 function interface_mt:_start_ssl(call_onconnect) -- old socket will be destroyed, therefore we have to close read/write events first
174 --vdebug( "starting ssl session with client id:", self.id )
175 local _
176 _ = self.eventread and self.eventread:close( ) -- close events; this must be called outside of the event callbacks!
177 _ = self.eventwrite and self.eventwrite:close( )
178 self.eventread, self.eventwrite = nil, nil
179 local err
180 self.conn, err = ssl.wrap( self.conn, self._sslctx )
181 if err then
182 self.fatalerror = err
183 self.conn = nil -- cannot be used anymore
184 if call_onconnect then 195 if call_onconnect then
185 self.ondisconnect = nil -- dont call this when client isnt really connected 196 self.ondisconnect = nil -- dont call this when client isnt really connected
186 end 197 end
187 self:_close() 198 self:_close()
188 debug( "fatal error while ssl wrapping:", err ) 199 debug( "handshake failed because:", self.fatalerror )
189 return false 200 self.eventhandshake = nil
190 end 201 return -1
191 self.conn:settimeout( 0 ) -- set non blocking 202 end
192 local handshakecallback = coroutine_wrap( 203 event = coroutine_yield( event, cfg.HANDSHAKE_TIMEOUT ) -- yield this monster...
193 function( event ) 204 end
194 local _, err 205 end
195 local attempt = 0 206 )
196 local maxattempt = cfg.MAX_HANDSHAKE_ATTEMPTS 207 debug "starting handshake..."
197 while attempt < maxattempt do -- no endless loop 208 self:_lock( false, true, true ) -- unlock read/write events, but keep interface locked
198 attempt = attempt + 1 209 self.eventhandshake = addevent( base, self.conn, EV_READWRITE, handshakecallback, cfg.HANDSHAKE_TIMEOUT )
199 debug( "ssl handshake of client with id:"..tostring(self)..", attempt:"..attempt ) 210 return true
200 if attempt > maxattempt then 211 end
201 self.fatalerror = "max handshake attempts exceeded" 212 function interface_mt:_destroy() -- close this interface + events and call last listener
202 elseif EV_TIMEOUT == event then 213 debug( "closing client with id:", self.id, self.fatalerror )
203 self.fatalerror = "timeout during handshake" 214 self:_lock( true, true, true ) -- first of all, lock the interface to avoid further actions
204 else 215 local _
205 _, err = self.conn:dohandshake( ) 216 _ = self.eventread and self.eventread:close( )
206 if not err then 217 if self.type == "client" then
207 self:_lock( false, false, false ) -- unlock the interface; sending, closing etc allowed 218 _ = self.eventwrite and self.eventwrite:close( )
208 self.send = self.conn.send -- caching table lookups with new client object 219 _ = self.eventhandshake and self.eventhandshake:close( )
209 self.receive = self.conn.receive 220 _ = self.eventstarthandshake and self.eventstarthandshake:close( )
210 if not call_onconnect then -- trigger listener 221 _ = self.eventconnect and self.eventconnect:close( )
211 self:onstatus("ssl-handshake-complete"); 222 _ = self.eventsession and self.eventsession:close( )
212 end 223 _ = self.eventwritetimeout and self.eventwritetimeout:close( )
213 self:_start_session( call_onconnect ) 224 _ = self.eventreadtimeout and self.eventreadtimeout:close( )
214 debug( "ssl handshake done" ) 225 _ = self.ondisconnect and self:ondisconnect( self.fatalerror ~= "client to close" and self.fatalerror) -- call ondisconnect listener (wont be the case if handshake failed on connect)
215 self.eventhandshake = nil 226 _ = self.conn and self.conn:close( ) -- close connection
216 return -1 227 _ = self._server and self._server:counter(-1);
217 end 228 self.eventread, self.eventwrite = nil, nil
218 if err == "wantwrite" then 229 self.eventstarthandshake, self.eventhandshake, self.eventclose = nil, nil, nil
219 event = EV_WRITE 230 self.readcallback, self.writecallback = nil, nil
220 elseif err == "wantread" then 231 else
221 event = EV_READ 232 self.conn:close( )
222 else 233 self.eventread, self.eventclose = nil, nil
223 debug( "ssl handshake error:", err ) 234 self.interface, self.readcallback = nil, nil
224 self.fatalerror = err 235 end
225 end 236 interfacelist[ self ] = nil
226 end 237 return true
227 if self.fatalerror then 238 end
228 if call_onconnect then 239
229 self.ondisconnect = nil -- dont call this when client isnt really connected 240 function interface_mt:_lock(nointerface, noreading, nowriting) -- lock or unlock this interface or events
230 end 241 self.nointerface, self.noreading, self.nowriting = nointerface, noreading, nowriting
231 self:_close() 242 return nointerface, noreading, nowriting
232 debug( "handshake failed because:", self.fatalerror ) 243 end
233 self.eventhandshake = nil 244
234 return -1 245 --TODO: Deprecate
235 end 246 function interface_mt:lock_read(switch)
236 event = coroutine_yield( event, cfg.HANDSHAKE_TIMEOUT ) -- yield this monster... 247 if switch then
248 return self:pause();
249 else
250 return self:resume();
251 end
252 end
253
254 function interface_mt:pause()
255 return self:_lock(self.nointerface, true, self.nowriting);
256 end
257
258 function interface_mt:resume()
259 self:_lock(self.nointerface, false, self.nowriting);
260 if not self.eventread then
261 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
262 end
263 end
264
265 function interface_mt:counter(c)
266 if c then
267 self._connections = self._connections + c
268 end
269 return self._connections
270 end
271
272 -- Public methods
273 function interface_mt:write(data)
274 if self.nowriting then return nil, "locked" end
275 --vdebug( "try to send data to client, id/data:", self.id, data )
276 data = tostring( data )
277 local len = #data
278 local total = len + self.writebufferlen
279 if total > cfg.MAX_SEND_LENGTH then -- check buffer length
280 local err = "send buffer exceeded"
281 debug( "error:", err ) -- to much, check your app
282 return nil, err
283 end
284 t_insert(self.writebuffer, data) -- new buffer
285 self.writebufferlen = total
286 if not self.eventwrite then -- register new write event
287 --vdebug( "register new write event" )
288 self.eventwrite = addevent( base, self.conn, EV_WRITE, self.writecallback, cfg.WRITE_TIMEOUT )
289 end
290 return true
291 end
292 function interface_mt:close()
293 if self.nointerface then return nil, "locked"; end
294 debug( "try to close client connection with id:", self.id )
295 if self.type == "client" then
296 self.fatalerror = "client to close"
297 if self.eventwrite then -- wait for incomplete write request
298 self:_lock( true, true, false )
299 debug "closing delayed until writebuffer is empty"
300 return nil, "writebuffer not empty, waiting"
301 else -- close now
302 self:_lock( true, true, true )
303 self:_close()
304 return true
305 end
306 else
307 debug( "try to close server with id:", tostring(self.id))
308 self.fatalerror = "server to close"
309 self:_lock( true )
310 self:_close( 0 )
311 return true
312 end
313 end
314
315 function interface_mt:socket()
316 return self.conn
317 end
318
319 function interface_mt:server()
320 return self._server or self;
321 end
322
323 function interface_mt:port()
324 return self._port
325 end
326
327 function interface_mt:serverport()
328 return self._serverport
329 end
330
331 function interface_mt:ip()
332 return self._ip
333 end
334
335 function interface_mt:ssl()
336 return self._usingssl
337 end
338 interface_mt.clientport = interface_mt.port -- COMPAT server_select
339
340 function interface_mt:type()
341 return self._type or "client"
342 end
343
344 function interface_mt:connections()
345 return self._connections
346 end
347
348 function interface_mt:address()
349 return self.addr
350 end
351
352 function interface_mt:set_sslctx(sslctx)
353 self._sslctx = sslctx;
354 if sslctx then
355 self.starttls = nil; -- use starttls() of interface_mt
356 else
357 self.starttls = false; -- prevent starttls()
358 end
359 end
360
361 function interface_mt:set_mode(pattern)
362 if pattern then
363 self._pattern = pattern;
364 end
365 return self._pattern;
366 end
367
368 function interface_mt:set_send(new_send) -- luacheck: ignore 212
369 -- No-op, we always use the underlying connection's send
370 end
371
372 function interface_mt:starttls(sslctx, call_onconnect)
373 debug( "try to start ssl at client id:", self.id )
374 local err
375 self._sslctx = sslctx;
376 if self._usingssl then -- startssl was already called
377 err = "ssl already active"
378 end
379 if err then
380 debug( "error:", err )
381 return nil, err
382 end
383 self._usingssl = true
384 self.startsslcallback = function( ) -- we have to start the handshake outside of a read/write event
385 self.startsslcallback = nil
386 self:_start_ssl(call_onconnect);
387 self.eventstarthandshake = nil
388 return -1
389 end
390 if not self.eventwrite then
391 self:_lock( true, true, true ) -- lock the interface, to not disturb the handshake
392 self.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, self.startsslcallback, 0 ) -- add event to start handshake
393 else -- wait until writebuffer is empty
394 self:_lock( true, true, false )
395 debug "ssl session delayed until writebuffer is empty..."
396 end
397 self.starttls = false;
398 return true
399 end
400
401 function interface_mt:setoption(option, value)
402 if self.conn.setoption then
403 return self.conn:setoption(option, value);
404 end
405 return false, "setoption not implemented";
406 end
407
408 function interface_mt:setlistener(listener)
409 self:ondetach(); -- Notify listener that it is no longer responsible for this connection
410 self.onconnect, self.ondisconnect, self.onincoming, self.ontimeout,
411 self.onreadtimeout, self.onstatus, self.ondetach
412 = listener.onconnect, listener.ondisconnect, listener.onincoming, listener.ontimeout,
413 listener.onreadtimeout, listener.onstatus, listener.ondetach;
414 end
415
416 -- Stub handlers
417 function interface_mt:onconnect()
418 end
419 function interface_mt:onincoming()
420 end
421 function interface_mt:ondisconnect()
422 end
423 function interface_mt:ontimeout()
424 end
425 function interface_mt:onreadtimeout()
426 self.fatalerror = "timeout during receiving"
427 debug( "connection failed:", self.fatalerror )
428 self:_close()
429 self.eventread = nil
430 end
431 function interface_mt:ondrain()
432 end
433 function interface_mt:ondetach()
434 end
435 function interface_mt:onstatus()
436 end
437
438 -- End of client interface methods
439
440 local function handleclient( client, ip, port, server, pattern, listener, sslctx ) -- creates an client interface
441 --vdebug("creating client interfacce...")
442 local interface = {
443 type = "client";
444 conn = client;
445 currenttime = socket_gettime( ); -- safe the origin
446 writebuffer = {}; -- writebuffer
447 writebufferlen = 0; -- length of writebuffer
448 send = client.send; -- caching table lookups
449 receive = client.receive;
450 onconnect = listener.onconnect; -- will be called when client disconnects
451 ondisconnect = listener.ondisconnect; -- will be called when client disconnects
452 onincoming = listener.onincoming; -- will be called when client sends data
453 ontimeout = listener.ontimeout; -- called when fatal socket timeout occurs
454 onreadtimeout = listener.onreadtimeout; -- called when socket inactivity timeout occurs
455 ondrain = listener.ondrain; -- called when writebuffer is empty
456 ondetach = listener.ondetach; -- called when disassociating this listener from this connection
457 onstatus = listener.onstatus; -- called for status changes (e.g. of SSL/TLS)
458 eventread = false, eventwrite = false, eventclose = false,
459 eventhandshake = false, eventstarthandshake = false; -- event handler
460 eventconnect = false, eventsession = false; -- more event handler...
461 eventwritetimeout = false; -- even more event handler...
462 eventreadtimeout = false;
463 fatalerror = false; -- error message
464 writecallback = false; -- will be called on write events
465 readcallback = false; -- will be called on read events
466 nointerface = true; -- lock/unlock parameter of this interface
467 noreading = false, nowriting = false; -- locks of the read/writecallback
468 startsslcallback = false; -- starting handshake callback
469 position = false; -- position of client in interfacelist
470
471 -- Properties
472 _ip = ip, _port = port, _server = server, _pattern = pattern,
473 _serverport = (server and server:port() or nil),
474 _sslctx = sslctx; -- parameters
475 _usingssl = false; -- client is using ssl;
476 }
477 if not has_luasec then interface.starttls = false; end
478 interface.id = tostring(interface):match("%x+$");
479 interface.writecallback = function( event ) -- called on write events
480 --vdebug( "new client write event, id/ip/port:", interface, ip, port )
481 if interface.nowriting or ( interface.fatalerror and ( "client to close" ~= interface.fatalerror ) ) then -- leave this event
482 --vdebug( "leaving this event because:", interface.nowriting or interface.fatalerror )
483 interface.eventwrite = false
484 return -1
485 end
486 if EV_TIMEOUT == event then -- took too long to write some data to socket -> disconnect
487 interface.fatalerror = "timeout during writing"
488 debug( "writing failed:", interface.fatalerror )
489 interface:_close()
490 interface.eventwrite = false
491 return -1
492 else -- can write :)
493 if interface._usingssl then -- handle luasec
494 if interface.eventreadtimeout then -- we have to read first
495 local ret = interface.readcallback( ) -- call readcallback
496 --vdebug( "tried to read in writecallback, result:", ret )
497 end
498 if interface.eventwritetimeout then -- luasec only
499 interface.eventwritetimeout:close( ) -- first we have to close timeout event which where regged after a wantread error
500 interface.eventwritetimeout = false
501 end
502 end
503 interface.writebuffer = { t_concat(interface.writebuffer) }
504 local succ, err, byte = interface.conn:send( interface.writebuffer[1], 1, interface.writebufferlen )
505 --vdebug( "write data:", interface.writebuffer, "error:", err, "part:", byte )
506 if succ then -- writing succesful
507 interface.writebuffer[1] = nil
508 interface.writebufferlen = 0
509 interface:ondrain();
510 if interface.fatalerror then
511 debug "closing client after writing"
512 interface:_close() -- close interface if needed
513 elseif interface.startsslcallback then -- start ssl connection if needed
514 debug "starting ssl handshake after writing"
515 interface.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, interface.startsslcallback, 0 )
516 elseif interface.eventreadtimeout then
517 return EV_WRITE, EV_TIMEOUT
518 end
519 interface.eventwrite = nil
520 return -1
521 elseif byte and (err == "timeout" or err == "wantwrite") then -- want write again
522 --vdebug( "writebuffer is not empty:", err )
523 interface.writebuffer[1] = s_sub( interface.writebuffer[1], byte + 1, interface.writebufferlen ) -- new buffer
524 interface.writebufferlen = interface.writebufferlen - byte
525 if "wantread" == err then -- happens only with luasec
526 local callback = function( )
527 interface:_close()
528 interface.eventwritetimeout = nil
529 return -1;
237 end 530 end
238 end 531 interface.eventwritetimeout = addevent( base, nil, EV_TIMEOUT, callback, cfg.WRITE_TIMEOUT ) -- reg a new timeout event
239 ) 532 debug( "wantread during write attempt, reg it in readcallback but dont know what really happens next..." )
240 debug "starting handshake..." 533 -- hopefully this works with luasec; its simply not possible to use 2 different write events on a socket in luaevent
241 self:_lock( false, true, true ) -- unlock read/write events, but keep interface locked
242 self.eventhandshake = addevent( base, self.conn, EV_READWRITE, handshakecallback, cfg.HANDSHAKE_TIMEOUT )
243 return true
244 end
245 function interface_mt:_destroy() -- close this interface + events and call last listener
246 debug( "closing client with id:", self.id, self.fatalerror )
247 self:_lock( true, true, true ) -- first of all, lock the interface to avoid further actions
248 local _
249 _ = self.eventread and self.eventread:close( )
250 if self.type == "client" then
251 _ = self.eventwrite and self.eventwrite:close( )
252 _ = self.eventhandshake and self.eventhandshake:close( )
253 _ = self.eventstarthandshake and self.eventstarthandshake:close( )
254 _ = self.eventconnect and self.eventconnect:close( )
255 _ = self.eventsession and self.eventsession:close( )
256 _ = self.eventwritetimeout and self.eventwritetimeout:close( )
257 _ = self.eventreadtimeout and self.eventreadtimeout:close( )
258 _ = self.ondisconnect and self:ondisconnect( self.fatalerror ~= "client to close" and self.fatalerror) -- call ondisconnect listener (wont be the case if handshake failed on connect)
259 _ = self.conn and self.conn:close( ) -- close connection
260 _ = self._server and self._server:counter(-1);
261 self.eventread, self.eventwrite = nil, nil
262 self.eventstarthandshake, self.eventhandshake, self.eventclose = nil, nil, nil
263 self.readcallback, self.writecallback = nil, nil
264 else
265 self.conn:close( )
266 self.eventread, self.eventclose = nil, nil
267 self.interface, self.readcallback = nil, nil
268 end
269 interfacelist( "delete", self )
270 return true
271 end
272
273 function interface_mt:_lock(nointerface, noreading, nowriting) -- lock or unlock this interface or events
274 self.nointerface, self.noreading, self.nowriting = nointerface, noreading, nowriting
275 return nointerface, noreading, nowriting
276 end
277
278 --TODO: Deprecate
279 function interface_mt:lock_read(switch)
280 if switch then
281 return self:pause();
282 else
283 return self:resume();
284 end
285 end
286
287 function interface_mt:pause()
288 return self:_lock(self.nointerface, true, self.nowriting);
289 end
290
291 function interface_mt:resume()
292 self:_lock(self.nointerface, false, self.nowriting);
293 if not self.eventread then
294 self.eventread = addevent( base, self.conn, EV_READ, self.readcallback, cfg.READ_TIMEOUT ); -- register callback
295 end
296 end
297
298 function interface_mt:counter(c)
299 if c then
300 self._connections = self._connections + c
301 end
302 return self._connections
303 end
304
305 -- Public methods
306 function interface_mt:write(data)
307 if self.nowriting then return nil, "locked" end
308 --vdebug( "try to send data to client, id/data:", self.id, data )
309 data = tostring( data )
310 local len = #data
311 local total = len + self.writebufferlen
312 if total > cfg.MAX_SEND_LENGTH then -- check buffer length
313 local err = "send buffer exceeded"
314 debug( "error:", err ) -- to much, check your app
315 return nil, err
316 end
317 t_insert(self.writebuffer, data) -- new buffer
318 self.writebufferlen = total
319 if not self.eventwrite then -- register new write event
320 --vdebug( "register new write event" )
321 self.eventwrite = addevent( base, self.conn, EV_WRITE, self.writecallback, cfg.WRITE_TIMEOUT )
322 end
323 return true
324 end
325 function interface_mt:close()
326 if self.nointerface then return nil, "locked"; end
327 debug( "try to close client connection with id:", self.id )
328 if self.type == "client" then
329 self.fatalerror = "client to close"
330 if self.eventwrite then -- wait for incomplete write request
331 self:_lock( true, true, false )
332 debug "closing delayed until writebuffer is empty"
333 return nil, "writebuffer not empty, waiting"
334 else -- close now
335 self:_lock( true, true, true )
336 self:_close()
337 return true
338 end
339 else
340 debug( "try to close server with id:", tostring(self.id))
341 self.fatalerror = "server to close"
342 self:_lock( true )
343 self:_close( 0 )
344 return true
345 end
346 end
347
348 function interface_mt:socket()
349 return self.conn
350 end
351
352 function interface_mt:server()
353 return self._server or self;
354 end
355
356 function interface_mt:port()
357 return self._port
358 end
359
360 function interface_mt:serverport()
361 return self._serverport
362 end
363
364 function interface_mt:ip()
365 return self._ip
366 end
367
368 function interface_mt:ssl()
369 return self._usingssl
370 end
371 interface_mt.clientport = interface_mt.port -- COMPAT server_select
372
373 function interface_mt:type()
374 return self._type or "client"
375 end
376
377 function interface_mt:connections()
378 return self._connections
379 end
380
381 function interface_mt:address()
382 return self.addr
383 end
384
385 function interface_mt:set_sslctx(sslctx)
386 self._sslctx = sslctx;
387 if sslctx then
388 self.starttls = nil; -- use starttls() of interface_mt
389 else
390 self.starttls = false; -- prevent starttls()
391 end
392 end
393
394 function interface_mt:set_mode(pattern)
395 if pattern then
396 self._pattern = pattern;
397 end
398 return self._pattern;
399 end
400
401 function interface_mt:set_send(new_send)
402 -- No-op, we always use the underlying connection's send
403 end
404
405 function interface_mt:starttls(sslctx, call_onconnect)
406 debug( "try to start ssl at client id:", self.id )
407 local err
408 self._sslctx = sslctx;
409 if self._usingssl then -- startssl was already called
410 err = "ssl already active"
411 end
412 if err then
413 debug( "error:", err )
414 return nil, err
415 end
416 self._usingssl = true
417 self.startsslcallback = function( ) -- we have to start the handshake outside of a read/write event
418 self.startsslcallback = nil
419 self:_start_ssl(call_onconnect);
420 self.eventstarthandshake = nil
421 return -1
422 end
423 if not self.eventwrite then
424 self:_lock( true, true, true ) -- lock the interface, to not disturb the handshake
425 self.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, self.startsslcallback, 0 ) -- add event to start handshake
426 else -- wait until writebuffer is empty
427 self:_lock( true, true, false )
428 debug "ssl session delayed until writebuffer is empty..."
429 end
430 self.starttls = false;
431 return true
432 end
433
434 function interface_mt:setoption(option, value)
435 if self.conn.setoption then
436 return self.conn:setoption(option, value);
437 end
438 return false, "setoption not implemented";
439 end
440
441 function interface_mt:setlistener(listener)
442 self:ondetach(); -- Notify listener that it is no longer responsible for this connection
443 self.onconnect, self.ondisconnect, self.onincoming, self.ontimeout,
444 self.onreadtimeout, self.onstatus, self.ondetach
445 = listener.onconnect, listener.ondisconnect, listener.onincoming, listener.ontimeout,
446 listener.onreadtimeout, listener.onstatus, listener.ondetach;
447 end
448
449 -- Stub handlers
450 function interface_mt:onconnect()
451 end
452 function interface_mt:onincoming()
453 end
454 function interface_mt:ondisconnect()
455 end
456 function interface_mt:ontimeout()
457 end
458 function interface_mt:onreadtimeout()
459 self.fatalerror = "timeout during receiving"
460 debug( "connection failed:", self.fatalerror )
461 self:_close()
462 self.eventread = nil
463 end
464 function interface_mt:ondrain()
465 end
466 function interface_mt:ondetach()
467 end
468 function interface_mt:onstatus()
469 end
470 end
471
472 -- End of client interface methods
473
474 local handleclient;
475 do
476 local string_sub = string.sub -- caching table lookups
477 local addevent = base.addevent
478 local socket_gettime = socket.gettime
479 function handleclient( client, ip, port, server, pattern, listener, sslctx ) -- creates an client interface
480 --vdebug("creating client interfacce...")
481 local interface = {
482 type = "client";
483 conn = client;
484 currenttime = socket_gettime( ); -- safe the origin
485 writebuffer = {}; -- writebuffer
486 writebufferlen = 0; -- length of writebuffer
487 send = client.send; -- caching table lookups
488 receive = client.receive;
489 onconnect = listener.onconnect; -- will be called when client disconnects
490 ondisconnect = listener.ondisconnect; -- will be called when client disconnects
491 onincoming = listener.onincoming; -- will be called when client sends data
492 ontimeout = listener.ontimeout; -- called when fatal socket timeout occurs
493 onreadtimeout = listener.onreadtimeout; -- called when socket inactivity timeout occurs
494 ondrain = listener.ondrain; -- called when writebuffer is empty
495 ondetach = listener.ondetach; -- called when disassociating this listener from this connection
496 onstatus = listener.onstatus; -- called for status changes (e.g. of SSL/TLS)
497 eventread = false, eventwrite = false, eventclose = false,
498 eventhandshake = false, eventstarthandshake = false; -- event handler
499 eventconnect = false, eventsession = false; -- more event handler...
500 eventwritetimeout = false; -- even more event handler...
501 eventreadtimeout = false;
502 fatalerror = false; -- error message
503 writecallback = false; -- will be called on write events
504 readcallback = false; -- will be called on read events
505 nointerface = true; -- lock/unlock parameter of this interface
506 noreading = false, nowriting = false; -- locks of the read/writecallback
507 startsslcallback = false; -- starting handshake callback
508 position = false; -- position of client in interfacelist
509
510 -- Properties
511 _ip = ip, _port = port, _server = server, _pattern = pattern,
512 _serverport = (server and server:port() or nil),
513 _sslctx = sslctx; -- parameters
514 _usingssl = false; -- client is using ssl;
515 }
516 if not has_luasec then interface.starttls = false; end
517 interface.id = tostring(interface):match("%x+$");
518 interface.writecallback = function( event ) -- called on write events
519 --vdebug( "new client write event, id/ip/port:", interface, ip, port )
520 if interface.nowriting or ( interface.fatalerror and ( "client to close" ~= interface.fatalerror ) ) then -- leave this event
521 --vdebug( "leaving this event because:", interface.nowriting or interface.fatalerror )
522 interface.eventwrite = false
523 return -1
524 end
525 if EV_TIMEOUT == event then -- took too long to write some data to socket -> disconnect
526 interface.fatalerror = "timeout during writing"
527 debug( "writing failed:", interface.fatalerror )
528 interface:_close()
529 interface.eventwrite = false
530 return -1
531 else -- can write :)
532 if interface._usingssl then -- handle luasec
533 if interface.eventreadtimeout then -- we have to read first
534 local ret = interface.readcallback( ) -- call readcallback
535 --vdebug( "tried to read in writecallback, result:", ret )
536 end
537 if interface.eventwritetimeout then -- luasec only
538 interface.eventwritetimeout:close( ) -- first we have to close timeout event which where regged after a wantread error
539 interface.eventwritetimeout = false
540 end
541 end
542 interface.writebuffer = { t_concat(interface.writebuffer) }
543 local succ, err, byte = interface.conn:send( interface.writebuffer[1], 1, interface.writebufferlen )
544 --vdebug( "write data:", interface.writebuffer, "error:", err, "part:", byte )
545 if succ then -- writing succesful
546 interface.writebuffer[1] = nil
547 interface.writebufferlen = 0
548 interface:ondrain();
549 if interface.fatalerror then
550 debug "closing client after writing"
551 interface:_close() -- close interface if needed
552 elseif interface.startsslcallback then -- start ssl connection if needed
553 debug "starting ssl handshake after writing"
554 interface.eventstarthandshake = addevent( base, nil, EV_TIMEOUT, interface.startsslcallback, 0 )
555 elseif interface.eventreadtimeout then
556 return EV_WRITE, EV_TIMEOUT
557 end
558 interface.eventwrite = nil
559 return -1
560 elseif byte and (err == "timeout" or err == "wantwrite") then -- want write again
561 --vdebug( "writebuffer is not empty:", err )
562 interface.writebuffer[1] = string_sub( interface.writebuffer[1], byte + 1, interface.writebufferlen ) -- new buffer
563 interface.writebufferlen = interface.writebufferlen - byte
564 if "wantread" == err then -- happens only with luasec
565 local callback = function( )
566 interface:_close()
567 interface.eventwritetimeout = nil
568 return -1;
569 end
570 interface.eventwritetimeout = addevent( base, nil, EV_TIMEOUT, callback, cfg.WRITE_TIMEOUT ) -- reg a new timeout event
571 debug( "wantread during write attempt, reg it in readcallback but dont know what really happens next..." )
572 -- hopefully this works with luasec; its simply not possible to use 2 different write events on a socket in luaevent
573 return -1
574 end
575 return EV_WRITE, cfg.WRITE_TIMEOUT
576 else -- connection was closed during writing or fatal error
577 interface.fatalerror = err or "fatal error"
578 debug( "connection failed in write event:", interface.fatalerror )
579 interface:_close()
580 interface.eventwrite = nil
581 return -1 534 return -1
582 end 535 end
583 end 536 return EV_WRITE, cfg.WRITE_TIMEOUT
584 end 537 else -- connection was closed during writing or fatal error
585 538 interface.fatalerror = err or "fatal error"
586 interface.readcallback = function( event ) -- called on read events 539 debug( "connection failed in write event:", interface.fatalerror )
587 --vdebug( "new client read event, id/ip/port:", tostring(interface.id), tostring(ip), tostring(port) ) 540 interface:_close()
588 if interface.noreading or interface.fatalerror then -- leave this event 541 interface.eventwrite = nil
589 --vdebug( "leaving this event because:", tostring(interface.noreading or interface.fatalerror) )
590 interface.eventread = nil
591 return -1 542 return -1
592 end 543 end
593 if EV_TIMEOUT == event and interface:onreadtimeout() ~= true then 544 end
594 return -1 -- took too long to get some data from client -> disconnect 545 end
595 end 546
596 if interface._usingssl then -- handle luasec 547 interface.readcallback = function( event ) -- called on read events
597 if interface.eventwritetimeout then -- ok, in the past writecallback was regged 548 --vdebug( "new client read event, id/ip/port:", tostring(interface.id), tostring(ip), tostring(port) )
598 local ret = interface.writecallback( ) -- call it 549 if interface.noreading or interface.fatalerror then -- leave this event
599 --vdebug( "tried to write in readcallback, result:", tostring(ret) ) 550 --vdebug( "leaving this event because:", tostring(interface.noreading or interface.fatalerror) )
551 interface.eventread = nil
552 return -1
553 end
554 if EV_TIMEOUT == event and interface:onreadtimeout() ~= true then
555 return -1 -- took too long to get some data from client -> disconnect
556 end
557 if interface._usingssl then -- handle luasec
558 if interface.eventwritetimeout then -- ok, in the past writecallback was regged
559 local ret = interface.writecallback( ) -- call it
560 --vdebug( "tried to write in readcallback, result:", tostring(ret) )
561 end
562 if interface.eventreadtimeout then
563 interface.eventreadtimeout:close( )
564 interface.eventreadtimeout = nil
565 end
566 end
567 local buffer, err, part = interface.conn:receive( interface._pattern ) -- receive buffer with "pattern"
568 --vdebug( "read data:", tostring(buffer), "error:", tostring(err), "part:", tostring(part) )
569 buffer = buffer or part
570 if buffer and #buffer > cfg.MAX_READ_LENGTH then -- check buffer length
571 interface.fatalerror = "receive buffer exceeded"
572 debug( "fatal error:", interface.fatalerror )
573 interface:_close()
574 interface.eventread = nil
575 return -1
576 end
577 if err and ( err ~= "timeout" and err ~= "wantread" ) then
578 if "wantwrite" == err then -- need to read on write event
579 if not interface.eventwrite then -- register new write event if needed
580 interface.eventwrite = addevent( base, interface.conn, EV_WRITE, interface.writecallback, cfg.WRITE_TIMEOUT )
600 end 581 end
601 if interface.eventreadtimeout then 582 interface.eventreadtimeout = addevent( base, nil, EV_TIMEOUT,
602 interface.eventreadtimeout:close( ) 583 function( )
603 interface.eventreadtimeout = nil 584 interface:_close()
604 end 585 end, cfg.READ_TIMEOUT
605 end 586 )
606 local buffer, err, part = interface.conn:receive( interface._pattern ) -- receive buffer with "pattern" 587 debug( "wantwrite during read attempt, reg it in writecallback but dont know what really happens next..." )
607 --vdebug( "read data:", tostring(buffer), "error:", tostring(err), "part:", tostring(part) ) 588 -- to be honest i dont know what happens next, if it is allowed to first read, the write etc...
608 buffer = buffer or part 589 else -- connection was closed or fatal error
609 if buffer and #buffer > cfg.MAX_READ_LENGTH then -- check buffer length 590 interface.fatalerror = err
610 interface.fatalerror = "receive buffer exceeded" 591 debug( "connection failed in read event:", interface.fatalerror )
611 debug( "fatal error:", interface.fatalerror )
612 interface:_close() 592 interface:_close()
613 interface.eventread = nil 593 interface.eventread = nil
614 return -1 594 return -1
615 end 595 end
616 if err and ( err ~= "timeout" and err ~= "wantread" ) then 596 else
617 if "wantwrite" == err then -- need to read on write event 597 interface.onincoming( interface, buffer, err ) -- send new data to listener
618 if not interface.eventwrite then -- register new write event if needed 598 end
619 interface.eventwrite = addevent( base, interface.conn, EV_WRITE, interface.writecallback, cfg.WRITE_TIMEOUT ) 599 if interface.noreading then
620 end 600 interface.eventread = nil;
621 interface.eventreadtimeout = addevent( base, nil, EV_TIMEOUT, 601 return -1;
622 function( ) 602 end
623 interface:_close() 603 return EV_READ, cfg.READ_TIMEOUT
624 end, cfg.READ_TIMEOUT 604 end
625 ) 605
626 debug( "wantwrite during read attempt, reg it in writecallback but dont know what really happens next..." ) 606 client:settimeout( 0 ) -- set non blocking
627 -- to be honest i dont know what happens next, if it is allowed to first read, the write etc... 607 setmetatable(interface, interface_mt)
628 else -- connection was closed or fatal error 608 interfacelist[ interface ] = true -- add to interfacelist
629 interface.fatalerror = err 609 return interface
630 debug( "connection failed in read event:", interface.fatalerror ) 610 end
631 interface:_close() 611
632 interface.eventread = nil 612 local function handleserver( server, addr, port, pattern, listener, sslctx ) -- creates an server interface
633 return -1 613 debug "creating server interface..."
634 end 614 local interface = {
615 _connections = 0;
616
617 conn = server;
618 onconnect = listener.onconnect; -- will be called when new client connected
619 eventread = false; -- read event handler
620 eventclose = false; -- close event handler
621 readcallback = false; -- read event callback
622 fatalerror = false; -- error message
623 nointerface = true; -- lock/unlock parameter
624
625 _ip = addr, _port = port, _pattern = pattern,
626 _sslctx = sslctx;
627 }
628 interface.id = tostring(interface):match("%x+$");
629 interface.readcallback = function( event ) -- server handler, called on incoming connections
630 --vdebug( "server can accept, id/addr/port:", interface, addr, port )
631 if interface.fatalerror then
632 --vdebug( "leaving this event because:", self.fatalerror )
633 interface.eventread = nil
634 return -1
635 end
636 local delay = cfg.ACCEPT_DELAY
637 if EV_TIMEOUT == event then
638 if interface._connections >= cfg.MAX_CONNECTIONS then -- check connection count
639 debug( "to many connections, seconds to wait for next accept:", delay )
640 return EV_TIMEOUT, delay -- timeout...
635 else 641 else
636 interface.onincoming( interface, buffer, err ) -- send new data to listener 642 return EV_READ -- accept again
637 end 643 end
638 if interface.noreading then 644 end
639 interface.eventread = nil; 645 --vdebug("max connection check ok, accepting...")
640 return -1; 646 local client, err = server:accept() -- try to accept; TODO: check err
641 end 647 while client do
642 return EV_READ, cfg.READ_TIMEOUT 648 if interface._connections >= cfg.MAX_CONNECTIONS then
643 end 649 client:close( ) -- refuse connection
644 650 debug( "maximal connections reached, refuse client connection; accept delay:", delay )
645 client:settimeout( 0 ) -- set non blocking 651 return EV_TIMEOUT, delay -- delay for next accept attempt
646 setmetatable(interface, interface_mt) 652 end
647 interfacelist( "add", interface ) -- add to interfacelist 653 local client_ip, client_port = client:getpeername( )
648 return interface 654 interface._connections = interface._connections + 1 -- increase connection count
649 end 655 local clientinterface = handleclient( client, client_ip, client_port, interface, pattern, listener, sslctx )
650 end 656 --vdebug( "client id:", clientinterface, "startssl:", startssl )
651 657 if has_luasec and sslctx then
652 local handleserver 658 clientinterface:starttls(sslctx, true)
653 do 659 else
654 function handleserver( server, addr, port, pattern, listener, sslctx ) -- creates an server interface 660 clientinterface:_start_session( true )
655 debug "creating server interface..." 661 end
656 local interface = { 662 debug( "accepted incoming client connection from:", client_ip or "<unknown IP>", client_port or "<unknown port>", "to", port or "<unknown port>");
657 _connections = 0; 663
658 664 client, err = server:accept() -- try to accept again
659 conn = server; 665 end
660 onconnect = listener.onconnect; -- will be called when new client connected 666 return EV_READ
661 eventread = false; -- read event handler 667 end
662 eventclose = false; -- close event handler 668
663 readcallback = false; -- read event callback 669 server:settimeout( 0 )
664 fatalerror = false; -- error message 670 setmetatable(interface, interface_mt)
665 nointerface = true; -- lock/unlock parameter 671 interfacelist[ interface ] = true
666 672 interface:_start_session()
667 _ip = addr, _port = port, _pattern = pattern, 673 return interface
668 _sslctx = sslctx; 674 end
669 } 675
670 interface.id = tostring(interface):match("%x+$"); 676 local function addserver( addr, port, listener, pattern, sslctx, startssl ) -- TODO: check arguments
671 interface.readcallback = function( event ) -- server handler, called on incoming connections 677 --vdebug( "creating new tcp server with following parameters:", addr or "nil", port or "nil", sslctx or "nil", startssl or "nil")
672 --vdebug( "server can accept, id/addr/port:", interface, addr, port ) 678 if sslctx and not has_luasec then
673 if interface.fatalerror then 679 debug "fatal error: luasec not found"
674 --vdebug( "leaving this event because:", self.fatalerror ) 680 return nil, "luasec not found"
675 interface.eventread = nil 681 end
676 return -1 682 local server, err = socket.bind( addr, port, cfg.ACCEPT_QUEUE ) -- create server socket
677 end 683 if not server then
678 local delay = cfg.ACCEPT_DELAY 684 debug( "creating server socket on "..addr.." port "..port.." failed:", err )
679 if EV_TIMEOUT == event then 685 return nil, err
680 if interface._connections >= cfg.MAX_CONNECTIONS then -- check connection count 686 end
681 debug( "to many connections, seconds to wait for next accept:", delay ) 687 local interface = handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- new server handler
682 return EV_TIMEOUT, delay -- timeout... 688 debug( "new server created with id:", tostring(interface))
683 else 689 return interface
684 return EV_READ -- accept again 690 end
685 end 691
686 end 692 local function wrapclient( client, ip, port, listeners, pattern, sslctx )
687 --vdebug("max connection check ok, accepting...") 693 local interface = handleclient( client, ip, port, nil, pattern, listeners, sslctx )
688 local client, err = server:accept() -- try to accept; TODO: check err 694 interface:_start_connection(sslctx)
689 while client do 695 return interface, client
690 if interface._connections >= cfg.MAX_CONNECTIONS then 696 --function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface
691 client:close( ) -- refuse connection 697 end
692 debug( "maximal connections reached, refuse client connection; accept delay:", delay ) 698
693 return EV_TIMEOUT, delay -- delay for next accept attempt 699 local function addclient( addr, serverport, listener, pattern, sslctx, typ )
694 end 700 if sslctx and not has_luasec then
695 local client_ip, client_port = client:getpeername( ) 701 debug "need luasec, but not available"
696 interface._connections = interface._connections + 1 -- increase connection count 702 return nil, "luasec not found"
697 local clientinterface = handleclient( client, client_ip, client_port, interface, pattern, listener, sslctx ) 703 end
698 --vdebug( "client id:", clientinterface, "startssl:", startssl ) 704 if getaddrinfo and not typ then
699 if has_luasec and sslctx then 705 local addrinfo, err = getaddrinfo(addr)
700 clientinterface:starttls(sslctx, true) 706 if not addrinfo then return nil, err end
701 else 707 if addrinfo[1] and addrinfo[1].family == "inet6" then
702 clientinterface:_start_session( true ) 708 typ = "tcp6"
703 end 709 end
704 debug( "accepted incoming client connection from:", client_ip or "<unknown IP>", client_port or "<unknown port>", "to", port or "<unknown port>"); 710 end
705 711 local create = socket[typ or "tcp"]
706 client, err = server:accept() -- try to accept again 712 if type( create ) ~= "function" then
707 end 713 return nil, "invalid socket type"
708 return EV_READ 714 end
709 end 715 local client, err = create() -- creating new socket
710 716 if not client then
711 server:settimeout( 0 ) 717 debug( "cannot create socket:", err )
712 setmetatable(interface, interface_mt) 718 return nil, err
713 interfacelist( "add", interface ) 719 end
714 interface:_start_session() 720 client:settimeout( 0 ) -- set nonblocking
715 return interface 721 local res, err = client:connect( addr, serverport ) -- connect
716 end 722 if res or ( err == "timeout" or err == "Operation already in progress" ) then
717 end 723 if client.getsockname then
718 724 addr = client:getsockname( )
719 local addserver = ( function( ) 725 end
720 return function( addr, port, listener, pattern, sslctx, startssl ) -- TODO: check arguments 726 local interface = wrapclient( client, addr, serverport, listener, pattern, sslctx )
721 --vdebug( "creating new tcp server with following parameters:", addr or "nil", port or "nil", sslctx or "nil", startssl or "nil") 727 debug( "new connection id:", interface.id )
722 if sslctx and not has_luasec then 728 return interface, err
723 debug "fatal error: luasec not found" 729 else
724 return nil, "luasec not found" 730 debug( "new connection failed:", err )
725 end 731 return nil, err
726 local server, err = socket.bind( addr, port, cfg.ACCEPT_QUEUE ) -- create server socket 732 end
727 if not server then 733 end
728 debug( "creating server socket on "..addr.." port "..port.." failed:", err ) 734
729 return nil, err 735 local function loop( ) -- starts the event loop
730 end
731 local interface = handleserver( server, addr, port, pattern, listener, sslctx, startssl ) -- new server handler
732 debug( "new server created with id:", tostring(interface))
733 return interface
734 end
735 end )( )
736
737 local addclient, wrapclient
738 do
739 function wrapclient( client, ip, port, listeners, pattern, sslctx )
740 local interface = handleclient( client, ip, port, nil, pattern, listeners, sslctx )
741 interface:_start_connection(sslctx)
742 return interface, client
743 --function handleclient( client, ip, port, server, pattern, listener, _, sslctx ) -- creates an client interface
744 end
745
746 function addclient( addr, serverport, listener, pattern, sslctx, typ )
747 if sslctx and not has_luasec then
748 debug "need luasec, but not available"
749 return nil, "luasec not found"
750 end
751 if getaddrinfo and not typ then
752 local addrinfo, err = getaddrinfo(addr)
753 if not addrinfo then return nil, err end
754 if addrinfo[1] and addrinfo[1].family == "inet6" then
755 typ = "tcp6"
756 end
757 end
758 local create = socket[typ or "tcp"]
759 if type( create ) ~= "function" then
760 return nil, "invalid socket type"
761 end
762 local client, err = create() -- creating new socket
763 if not client then
764 debug( "cannot create socket:", err )
765 return nil, err
766 end
767 client:settimeout( 0 ) -- set nonblocking
768 local res, err = client:connect( addr, serverport ) -- connect
769 if res or ( err == "timeout" or err == "Operation already in progress" ) then
770 if client.getsockname then
771 addr = client:getsockname( )
772 end
773 local interface = wrapclient( client, addr, serverport, listener, pattern, sslctx )
774 debug( "new connection id:", interface.id )
775 return interface, err
776 else
777 debug( "new connection failed:", err )
778 return nil, err
779 end
780 end
781 end
782
783
784 local loop = function( ) -- starts the event loop
785 base:loop( ) 736 base:loop( )
786 return "quitting"; 737 return "quitting";
787 end 738 end
788 739
789 local newevent = ( function( ) 740 local function newevent( ... )
790 local add = base.addevent 741 return addevent( base, ... )
791 return function( ... ) 742 end
792 return add( base, ... ) 743
793 end 744 local function closeallservers ( arg )
794 end )( ) 745 for item in pairs( interfacelist ) do
795
796 local closeallservers = function( arg )
797 for _, item in ipairs( interfacelist( ) ) do
798 if item.type == "server" then 746 if item.type == "server" then
799 item:close( arg ) 747 item:close( arg )
800 end 748 end
801 end 749 end
802 end 750 end
815 763
816 -- We need to hold onto the events to stop them 764 -- We need to hold onto the events to stop them
817 -- being garbage-collected 765 -- being garbage-collected
818 local signal_events = {}; -- [signal_num] -> event object 766 local signal_events = {}; -- [signal_num] -> event object
819 local function hook_signal(signal_num, handler) 767 local function hook_signal(signal_num, handler)
820 local function _handler(event) 768 local function _handler()
821 local ret = handler(); 769 local ret = handler();
822 if ret ~= false then -- Continue handling this signal? 770 if ret ~= false then -- Continue handling this signal?
823 return EV_SIGNAL; -- Yes 771 return EV_SIGNAL; -- Yes
824 end 772 end
825 return -1; -- Close this event 773 return -1; -- Close this event
864 , delay); 812 , delay);
865 end 813 end
866 end 814 end
867 815
868 return { 816 return {
869
870 cfg = cfg, 817 cfg = cfg,
871 base = base, 818 base = base,
872 loop = loop, 819 loop = loop,
873 link = link, 820 link = link,
874 event = event, 821 event = levent,
875 event_base = base, 822 event_base = base,
876 addevent = newevent, 823 addevent = newevent,
877 addserver = addserver, 824 addserver = addserver,
878 addclient = addclient, 825 addclient = addclient,
879 wrapclient = wrapclient, 826 wrapclient = wrapclient,