summaryrefslogtreecommitdiff
path: root/src/socketengines/socketengine_ports.cpp
blob: 5efa545b0563fa0a165d2662552ec669ecd608ac (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
/*       +------------------------------------+
 *       | 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 "inspircd.h"
#include "exitcodes.h"
#include <port.h>
#include "socketengines/socketengine_ports.h"
#include <ulimit.h>

PortsEngine::PortsEngine(InspIRCd* Instance) : SocketEngine(Instance)
{
	MAX_DESCRIPTORS = 0;
	EngineHandle = port_create();

	if (EngineHandle == -1)
	{
		ServerInstance->Logs->Log("SOCKET",SPARSE,"ERROR: Could not initialize socket engine: %s", strerror(errno));
		ServerInstance->Logs->Log("SOCKET",SPARSE,"ERROR: This is a fatal error, exiting now.");
		printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
		printf("ERROR: This is a fatal error, exiting now.\n");
		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;
}

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

	if (GetRemainingFds() <= 1)
		return false;

	if (ref[fd])
		return false;

	ref[fd] = eh;
	port_associate(EngineHandle, PORT_SOURCE_FD, fd, eh->Readable() ? POLLRDNORM : POLLWRNORM, eh);

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

void PortsEngine::WantWrite(EventHandler* eh)
{
	port_associate(EngineHandle, PORT_SOURCE_FD, eh->GetFd(), POLLRDNORM | POLLWRNORM, eh);
}

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

	port_dissociate(EngineHandle, PORT_SOURCE_FD, fd);

	CurrentSetSize--;
	ref[fd] = NULL;

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

int PortsEngine::GetMaxFds()
{
	if (MAX_DESCRIPTORS)
		return MAX_DESCRIPTORS;

	int max = ulimit(4, 0);
	if (max > 0)
	{
		MAX_DESCRIPTORS = max;
		return max;
	}
	else
	{
		ServerInstance->Logs->Log("SOCKET", DEFAULT, "ERROR: Can't determine maximum number of open sockets!");
		printf("ERROR: Can't determine maximum number of open sockets!\n");
		ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
	}
#include <ulimit.h>
}

int PortsEngine::GetRemainingFds()
{
	return GetMaxFds() - CurrentSetSize;
}

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 i = port_getn(EngineHandle, this->events, GetMaxFds() - 1, &nget, &poll_time);

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

	TotalEvents += nget;

	for (i = 0; i < nget; i++)
	{
		switch (this->events[i].portev_source)
		{
			case PORT_SOURCE_FD:
			{
				int fd = this->events[i].portev_object;
				if (ref[fd])
				{
					// reinsert port for next time around
					port_associate(EngineHandle, PORT_SOURCE_FD, fd, POLLRDNORM, ref[fd]);
					if ((this->events[i].portev_events & POLLRDNORM))
						ReadEvents++;
					else
						WriteEvents++;
					ref[fd]->HandleEvent((this->events[i].portev_events & POLLRDNORM) ? EVENT_READ : EVENT_WRITE);
				}
			}
			default:
			break;
		}
	}

	return i;
}

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