summaryrefslogtreecommitdiff
path: root/src/socketengines/socketengine_ports.cpp
blob: 8a2fb87f409ced96fd8ffa7b178f2f5901cb14e5 (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
/*
 * InspIRCd -- Internet Relay Chat Daemon
 *
 *   Copyright (C) 2009 Daniel De Graaf <danieldg@inspircd.org>
 *   Copyright (C) 2007-2008 Craig Edwards <craigedwards@brainbox.cc>
 *
 * This file is part of InspIRCd.  InspIRCd is free software: you can
 * redistribute it and/or modify it under the terms of the GNU General Public
 * License as published by the Free Software Foundation, version 2.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "inspircd.h"
#include "exitcodes.h"
#include <port.h>

#ifndef SOCKETENGINE_PORTS
#define SOCKETENGINE_PORTS

#ifndef __sun
# error You need Solaris 10 or later to make use of this code.
#endif

#include <vector>
#include <string>
#include <map>
#include "inspircd.h"
#include "socketengine.h"
#include <port.h>
#include <iostream>

/** A specialisation of the SocketEngine class, designed to use solaris 10 I/O completion ports
 */
class PortsEngine : public SocketEngine
{
private:
	/** These are used by epoll() to hold socket events
	 */
	port_event_t* events;
	int EngineHandle;
public:
	/** Create a new PortsEngine
	 */
	PortsEngine();
	/** Delete a PortsEngine
	 */
	virtual ~PortsEngine();
	virtual bool AddFd(EventHandler* eh, int event_mask);
	virtual void OnSetEvent(EventHandler* eh, int old_mask, int new_mask);
	virtual void DelFd(EventHandler* eh);
	virtual int DispatchEvents();
	virtual std::string GetName();
};

#endif


#include <ulimit.h>

PortsEngine::PortsEngine()
{
	int max = ulimit(4, 0);
	if (max > 0)
	{
		MAX_DESCRIPTORS = max;
	}
	else
	{
		ServerInstance->Logs->Log("SOCKET", LOG_DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
		std::cout << "ERROR: Can't determine maximum number of open sockets!" << std::endl;
		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
	}
	EngineHandle = port_create();

	if (EngineHandle == -1)
	{
		ServerInstance->Logs->Log("SOCKET", LOG_SPARSE, "ERROR: Could not initialize socket engine: %s", strerror(errno));
		ServerInstance->Logs->Log("SOCKET", LOG_SPARSE, "ERROR: This is a fatal error, exiting now.");
		std::cout << "ERROR: Could not initialize socket engine: " << strerror(errno) << std::endl;
		std::cout << "ERROR: This is a fatal error, exiting now." << std::endl;
		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
	}
	CurrentSetSize = 0;

	ref = new EventHandler* [GetMaxFds()];
	events = new port_event_t[GetMaxFds()];
	memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
}

PortsEngine::~PortsEngine()
{
	this->Close(EngineHandle);
	delete[] ref;
	delete[] events;
}

static int mask_to_events(int event_mask)
{
	int rv = 0;
	if (event_mask & (FD_WANT_POLL_READ | FD_WANT_FAST_READ))
		rv |= POLLRDNORM;
	if (event_mask & (FD_WANT_POLL_WRITE | FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE))
		rv |= POLLWRNORM;
	return rv;
}

bool PortsEngine::AddFd(EventHandler* eh, int event_mask)
{
	int fd = eh->GetFd();
	if ((fd < 0) || (fd > GetMaxFds() - 1))
		return false;

	if (ref[fd])
		return false;

	ref[fd] = eh;
	SocketEngine::SetEventMask(eh, event_mask);
	port_associate(EngineHandle, PORT_SOURCE_FD, fd, mask_to_events(event_mask), eh);

	ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "New file descriptor: %d", fd);
	CurrentSetSize++;
	return true;
}

void PortsEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask)
{
	if (mask_to_events(new_mask) != mask_to_events(old_mask))
		port_associate(EngineHandle, PORT_SOURCE_FD, eh->GetFd(), mask_to_events(new_mask), eh);
}

void PortsEngine::DelFd(EventHandler* eh)
{
	int fd = eh->GetFd();
	if ((fd < 0) || (fd > GetMaxFds() - 1))
		return;

	port_dissociate(EngineHandle, PORT_SOURCE_FD, fd);

	CurrentSetSize--;
	ref[fd] = NULL;

	ServerInstance->Logs->Log("SOCKET", LOG_DEBUG, "Remove file descriptor: %d", fd);
}

int PortsEngine::DispatchEvents()
{
	struct timespec poll_time;

	poll_time.tv_sec = 1;
	poll_time.tv_nsec = 0;

	unsigned int nget = 1; // used to denote a retrieve request.
	int ret = port_getn(EngineHandle, this->events, GetMaxFds() - 1, &nget, &poll_time);
	ServerInstance->UpdateTime();

	// first handle an error condition
	if (ret == -1)
		return -1;

	TotalEvents += nget;

	unsigned int i;
	for (i = 0; i < nget; i++)
	{
		switch (this->events[i].portev_source)
		{
			case PORT_SOURCE_FD:
			{
				int fd = this->events[i].portev_object;
				EventHandler* eh = ref[fd];
				if (eh)
				{
					int mask = eh->GetEventMask();
					if (events[i].portev_events & POLLWRNORM)
						mask &= ~(FD_WRITE_WILL_BLOCK | FD_WANT_FAST_WRITE | FD_WANT_SINGLE_WRITE);
					if (events[i].portev_events & POLLRDNORM)
						mask &= ~FD_READ_WILL_BLOCK;
					// reinsert port for next time around, pretending to be one-shot for writes
					SetEventMask(eh, mask);
					port_associate(EngineHandle, PORT_SOURCE_FD, fd, mask_to_events(mask), eh);
					if (events[i].portev_events & POLLRDNORM)
					{
						ReadEvents++;
						eh->HandleEvent(EVENT_READ);
						if (eh != ref[fd])
							continue;
					}
					if (events[i].portev_events & POLLWRNORM)
					{
						WriteEvents++;
						eh->HandleEvent(EVENT_WRITE);
					}
				}
			}
			default:
			break;
		}
	}

	return (int)i;
}

std::string PortsEngine::GetName()
{
	return "ports";
}

SocketEngine* CreateSocketEngine()
{
	return new PortsEngine;
}