summaryrefslogtreecommitdiff
path: root/src/socketengines/socketengine_iocp.cpp
blob: e09fb4d0a9345bacc84f7719ac8d83fd0332f0c2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd: (C) 2002-2009 InspIRCd Development Team
 * See: http://wiki.inspircd.org/Credits
 *
 * This program is free but copyrighted software; see
 *            the file COPYING for details.
 *
 * ---------------------------------------------------
 */

#include "socketengines/socketengine_iocp.h"
#include "exitcodes.h"
#include <mswsock.h>

IOCPEngine::IOCPEngine()
{
	MAX_DESCRIPTORS = 10240;

	/* Create completion port */
	m_completionPort = CreateIoCompletionPort(INVALID_HANDLE_VALUE, NULL, (ULONG_PTR)0, 0);

	if (!m_completionPort)
	{
		ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.");
		ServerInstance->Logs->Log("SOCKET",DEFAULT, "ERROR: this is a fatal error, exiting now.");
		printf("ERROR: Could not initialize socket engine. Your kernel probably does not have the proper features.\n");
		printf("ERROR: this is a fatal error, exiting now.\n");
		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
	}

	/* Null variables out. */
	CurrentSetSize = 0;
	MAX_DESCRIPTORS = 10240;
	ref = new EventHandler* [10240];
	memset(ref, 0, sizeof(EventHandler*) * MAX_DESCRIPTORS);
}

IOCPEngine::~IOCPEngine()
{
	/* Clean up winsock and close completion port */
	CloseHandle(m_completionPort);
	WSACleanup();
	delete[] ref;
}

bool IOCPEngine::AddFd(EventHandler* eh, int event_mask)
{
	/* Does it at least look valid? */
	if (!eh)
		return false;

	int* fake_fd = new int(GenerateFd(eh->GetFd()));
	int is_accept = 0;
	int opt_len = sizeof(int);

	/* In range? */
	if ((*fake_fd < 0) || (*fake_fd > MAX_DESCRIPTORS))
	{
		delete fake_fd;
		return false;
	}

	/* Already an entry here */
	if (ref[*fake_fd])
	{
		delete fake_fd;
		return false;
	}

	/* are we a listen socket? */
	getsockopt(eh->GetFd(), SOL_SOCKET, SO_ACCEPTCONN, (char*)&is_accept, &opt_len);

	/* set up the read event so the socket can actually receive data :P */
	eh->Extend("internal_fd", fake_fd);

	unsigned long completion_key = (ULONG_PTR)*fake_fd;
	/* assign the socket to the completion port */
	if (!CreateIoCompletionPort((HANDLE)eh->GetFd(), m_completionPort, completion_key, 0))
		return false;

	/* setup initial events */
	if(is_accept)
		PostAcceptEvent(eh);
	else
		PostReadEvent(eh);

	/* log message */
	ServerInstance->Logs->Log("SOCKET",DEBUG, "New fake fd: %u, real fd: %u, address 0x%p", *fake_fd, eh->GetFd(), eh);

	/* post a write event if there is data to be written */
	if (event_mask & (FD_WANT_POLL_WRITE | FD_WANT_FAST_WRITE))
		WantWrite(eh);

	/* we're all good =) */
	try
	{
		m_binding.insert( std::map<int, EventHandler*>::value_type( eh->GetFd(), eh ) );
	}
	catch (...)
	{
		/* Ohshi-, map::insert failed :/ */
		return false;
	}

	++CurrentSetSize;
	SocketEngine::SetEventMask(eh, event_mask);
	ref[*fake_fd] = eh;

	return true;
}

bool IOCPEngine::DelFd(EventHandler* eh, bool force /* = false */)
{
	if (!eh)
		return false;

	int* fake_fd = NULL;

	if (!eh->GetExt("internal_fd", fake_fd))
		return false;

	int fd = eh->GetFd();

	void* m_readEvent = NULL;
	void* m_writeEvent = NULL;
	void* m_acceptEvent = NULL;

	ServerInstance->Logs->Log("SOCKET",DEBUG, "Removing fake fd %u, real fd %u, address 0x%p", *fake_fd, eh->GetFd(), eh);

	/* Cancel pending i/o operations. */
	if (CancelIo((HANDLE)fd) == FALSE)
		return false;

	/* Free the buffer, and delete the event. */
	if (eh->GetExt("windows_readevent", m_readEvent))
	{
		if(((Overlapped*)m_readEvent)->m_params != 0)
			delete ((udp_overlap*)((Overlapped*)m_readEvent)->m_params);

		delete ((Overlapped*)m_readEvent);
		eh->Shrink("windows_readevent");
	}

	if(eh->GetExt("windows_writeevent", m_writeEvent))
	{
		delete ((Overlapped*)m_writeEvent);
		eh->Shrink("windows_writeevent");
	}

	if(eh->GetExt("windows_acceptevent", m_acceptEvent))
	{
		delete ((accept_overlap*)((Overlapped*)m_acceptEvent)->m_params);
		delete ((Overlapped*)m_acceptEvent);
		eh->Shrink("windows_accepevent");
	}

	/* Clear binding */
	ref[*fake_fd] = 0;
	m_binding.erase(eh->GetFd());

	delete fake_fd;
	eh->Shrink("internal_fd");

	/* decrement set size */
	--CurrentSetSize;

	/* success */
	return true;
}

void IOCPEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask)
{
	if (!eh)
		return;

	void* m_writeEvent = NULL;

	int* fake_fd = NULL;
	if (!eh->GetExt("internal_fd", fake_fd))
		return;

	/* Post event - write begin */
	if((new_mask & (FD_WANT_POLL_WRITE | FD_WANT_FAST_WRITE)) && !eh->GetExt("windows_writeevent", m_writeEvent))
	{
		ULONG_PTR completion_key = (ULONG_PTR)*fake_fd;
		Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_WRITE_READY, 0);
		eh->Shrink("windows_writeevent");
		eh->Extend("windows_writeevent",ov);
		PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
	}
}

bool IOCPEngine::PostCompletionEvent(EventHandler * eh, SocketIOEvent type, int param)
{
	if (!eh)
		return false;

	int* fake_fd = NULL;
	if (!eh->GetExt("internal_fd", fake_fd))
		return false;

	Overlapped * ov = new Overlapped(type, param);
	ULONG_PTR completion_key = (ULONG_PTR)*fake_fd;
	return PostQueuedCompletionStatus(m_completionPort, 0, completion_key, &ov->m_overlap);
}

void IOCPEngine::PostReadEvent(EventHandler * eh)
{
	if (!eh)
		return;

	Overlapped * ov = new Overlapped(SOCKET_IO_EVENT_READ_READY, 0);
	DWORD flags = 0;
	DWORD r_length = 0;
	WSABUF buf;

	/* by passing a null buffer pointer, we can have this working in the same way as epoll..
	 * its slower, but it saves modifying all network code.
	 */
	buf.buf = 0;
	buf.len = 0;

	/* determine socket type. */
	DWORD sock_type;
	int sock_len = sizeof(DWORD);
	if(getsockopt(eh->GetFd(), SOL_SOCKET, SO_TYPE, (char*)&sock_type, &sock_len) == -1)
	{
		/* wtfhax? */
		PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);
		delete ov;
		return;
	}
	switch(sock_type)
	{
		case SOCK_DGRAM:			/* UDP Socket */
		{
			udp_overlap * uv = new udp_overlap;
			uv->udp_sockaddr_len = sizeof(sockaddr);
			buf.buf = (char*)uv->udp_buffer;
			buf.len = sizeof(uv->udp_buffer);
			ov->m_params = (unsigned long)uv;
			if(WSARecvFrom(eh->GetFd(), &buf, 1, &uv->udp_len, &flags, uv->udp_sockaddr, (LPINT)&uv->udp_sockaddr_len, &ov->m_overlap, 0))
			{
				int err = WSAGetLastError();
				if(err != WSA_IO_PENDING)
				{
					delete ov;
					PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);
					return;
				}
			}
		}
		break;

		case SOCK_STREAM:			/* TCP Socket */
		{
			if(WSARecv(eh->GetFd(), &buf, 1, &r_length, &flags, &ov->m_overlap, 0) == SOCKET_ERROR)
			{
				if(WSAGetLastError() != WSA_IO_PENDING)
				{
					delete ov;
					PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, 0);
					return;
				}
			}
		}
		break;

		default:
		{
			printf("unknwon socket type: %u\n", sock_type);
			return;
		}
		break;
	}
	eh->Extend("windows_readevent", ov);
}

int IOCPEngine::DispatchEvents()
{
	DWORD len;
	LPOVERLAPPED overlap;
	Overlapped * ov;
	EventHandler * eh;
	ULONG_PTR intfd;
	int ret;
	unsigned long bytes_recv;

	while (GetQueuedCompletionStatus(m_completionPort, &len, &intfd, &overlap, 1000))
	{
		if (intfd > (unsigned long)MAX_DESCRIPTORS)
			continue;

		// woot, we got an event on a socket :P
		eh = ref[intfd];
		ov = CONTAINING_RECORD(overlap, Overlapped, m_overlap);

		if (eh == 0)
			continue;

		void* m_readEvent = NULL;
		void* m_writeEvent = NULL;

		eh->GetExt("windows_readevent", m_readEvent);
		eh->GetExt("windows_writeevent", m_writeEvent);

		TotalEvents++;

		switch(ov->m_event)
		{
			case SOCKET_IO_EVENT_WRITE_READY:
			{
				WriteEvents++;
				eh->Shrink("windows_writeevent");
				SetEventMask(eh, eh->GetEventMask() & ~FD_WRITE_WILL_BLOCK);
				eh->HandleEvent(EVENT_WRITE, 0);
			}
			break;

			case SOCKET_IO_EVENT_READ_READY:
			{
				ReadEvents++;
				SetEventMask(eh, eh->GetEventMask() & ~FD_READ_WILL_BLOCK);
				if(ov->m_params)
				{
					// if we had params, it means we are a udp socket with a udp_overlap pointer in this long.
					udp_overlap * uv = (udp_overlap*)ov->m_params;
					uv->udp_len = len;
					this->udp_ov = uv;
					eh->Shrink("windows_readevent");
					eh->HandleEvent(EVENT_READ, 0);
					this->udp_ov = 0;
					delete uv;
					PostReadEvent(eh);
				}
				else
				{
					ret = ioctlsocket(eh->GetFd(), FIONREAD, &bytes_recv);
					eh->Shrink("windows_readevent");
					if(ret != 0 || bytes_recv == 0)
					{
						/* end of file */
						PostCompletionEvent(eh, SOCKET_IO_EVENT_ERROR, EIO); /* Old macdonald had an error, EIEIO. */
					}
					else
					{
						eh->HandleEvent(EVENT_READ, 0);
						PostReadEvent(eh);
					}
				}
			}
			break;

			case SOCKET_IO_EVENT_ACCEPT:
			{
				/* this is kinda messy.. :/ */
				ReadEvents++;
				eh->HandleEvent(EVENT_READ, ov->m_params);
				delete ((accept_overlap*)ov->m_params);
				eh->Shrink("windows_acceptevent");
				PostAcceptEvent(eh);
			}
			break;

			case SOCKET_IO_EVENT_ERROR:
			{
				ErrorEvents++;
				eh->HandleEvent(EVENT_ERROR, ov->m_params);
			}
			break;
		}

		delete ov;
	}

	return 0;
}

void IOCPEngine::PostAcceptEvent(EventHandler * eh)
{
	if (!eh)
		return;

	int on = 1;
	u_long arg = 1;
	struct linger linger = { 0 };

	int fd = WSASocket(AF_INET, SOCK_STREAM, 0, 0, 0, WSA_FLAG_OVERLAPPED);

	setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, (char*)&on, sizeof(on));
	/* This is BSD compatible, setting l_onoff to 0 is *NOT* http://web.irc.org/mla/ircd-dev/msg02259.html */
	linger.l_onoff = 1;
	linger.l_linger = 1;
	setsockopt(fd, SOL_SOCKET, SO_LINGER, (char*)&linger,sizeof(linger));
	ioctlsocket(fd, FIONBIO, &arg);

	int len = sizeof(sockaddr_in) + 16;
	DWORD dwBytes;
	accept_overlap* ao = new accept_overlap;
	memset(ao->buf, 0, 1024);
	ao->socket = fd;

	Overlapped* ov = new Overlapped(SOCKET_IO_EVENT_ACCEPT, (int)ao);
	eh->Extend("windows_acceptevent", ov);

	if(AcceptEx(eh->GetFd(), fd, ao->buf, 0, len, len, &dwBytes, &ov->m_overlap) == FALSE)
	{
		int err = WSAGetLastError();
		if(err != WSA_IO_PENDING)
		{
			printf("PostAcceptEvent err: %d\n", err);
		}
	}
}


std::string IOCPEngine::GetName()
{
	return "iocp";
}

EventHandler * IOCPEngine::GetRef(int fd)
{
	std::map<int, EventHandler*>::iterator itr = m_binding.find(fd);
	return (itr == m_binding.end()) ? 0 : itr->second;
}

bool IOCPEngine::HasFd(int fd)
{
	return (GetRef(fd) != 0);
}

bool IOCPEngine::BoundsCheckFd(EventHandler* eh)
{
	int * internal_fd;
	if (!eh || eh->GetFd() < 0)
		return false;

	if(!eh->GetExt("internal_fd", internal_fd))
		return false;

	if(*internal_fd > MAX_DESCRIPTORS)
		return false;

	return true;
}

EventHandler * IOCPEngine::GetIntRef(int fd)
{
	if(fd < 0 || fd > MAX_DESCRIPTORS)
		return 0;
	return ref[fd];
}

int IOCPEngine::Accept(EventHandler* fd, sockaddr *addr, socklen_t *addrlen)
{
	//SOCKET s = fd->GetFd();

	Overlapped* acceptevent = NULL;
	if (!fd->GetExt("windows_acceptevent", acceptevent))
		/* Shit, no accept event on this socket! :( */
		return -1;

	Overlapped* ovl = acceptevent;
	accept_overlap* ov = (accept_overlap*)ovl->m_params;

	//sockaddr_in* server_address = (sockaddr_in*)&ov->buf[10];
	sockaddr_in* client_address = (sockaddr_in*)&ov->buf[38];

	memcpy(addr, client_address, sizeof(sockaddr_in));
	*addrlen = sizeof(sockaddr_in);

	return ov->socket;
}

int IOCPEngine::GetSockName(EventHandler* fd, sockaddr *name, socklen_t* namelen)
{
	Overlapped* ovl = NULL;

	if (!fd->GetExt("windows_acceptevent", ovl))
		return -1;

	accept_overlap* ov = (accept_overlap*)ovl->m_params;

	sockaddr_in* server_address = (sockaddr_in*)&ov->buf[10];
	//sockaddr_in* client_address = (sockaddr_in*)&ov->buf[38];

	memcpy(name, server_address, sizeof(sockaddr_in));
	*namelen = sizeof(sockaddr_in);

	return 0;
}

int IOCPEngine::RecvFrom(EventHandler* fd, void *buf, size_t len, int flags, struct sockaddr *from, socklen_t *fromlen)
{
	this->UpdateStats(len, 0);
	udp_overlap * ov = NULL;
	if (!fd->GetExt("windows_readevent", ov))
		return -1;
        memcpy(buf, ov->udp_buffer, ov->udp_len);
	memcpy(from, ov->udp_sockaddr, *fromlen);
	return ov->udp_len;
}

int IOCPEngine::Blocking(int fd)
{
	unsigned long opt = 0;
	return ioctlsocket(fd, FIONBIO, &opt);
}

int IOCPEngine::NonBlocking(int fd)
{
	unsigned long opt = 1;
	return ioctlsocket(fd, FIONBIO, &opt);
}

int IOCPEngine::Close(int fd)
{
	return closesocket(fd);
}

int IOCPEngine::Close(EventHandler* fd)
{
	return this->Close(fd->GetFd());
}