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
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2008 InspIRCd Development Team
* See: http://www.inspircd.org/wiki/index.php/Credits
*
* This program is free but copyrighted software; see
* the file COPYING for details.
*
* ---------------------------------------------------
*/
#include "inspircd.h"
#include "exitcodes.h"
#include "socketengines/socketengine_poll.h"
#include <poll.h>
#include <ulimit.h>
PollEngine::PollEngine(InspIRCd* Instance) : SocketEngine(Instance)
{
// Poll requires no special setup (which is nice).
CurrentSetSize = 0;
ref = new EventHandler* [GetMaxFds()];
events = new struct pollfd[GetMaxFds()];
memset(&events, 0, GetMaxFds() * sizeof(struct pollfd*));
}
PollEngine::~PollEngine()
{
// No destruction required, either.
delete[] ref;
delete[] events;
}
bool PollEngine::AddFd(EventHandler* eh)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > GetMaxFds() - 1))
{
ServerInstance->Logs->Log("SOCKET",DEBUG,"AddFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
return false;
}
if (GetRemainingFds() <= 1)
{
ServerInstance->Logs->Log("SOCKET",DEBUG,"No remaining FDs cannot add fd: %d", fd);
return false;
}
if (ref[fd])
{
ServerInstance->Logs->Log("SOCKET",DEBUG,"Attempt to add duplicate fd: %d", fd);
return false;
}
ref[fd] = eh;
events[fd].fd = fd;
if (eh->Readable())
{
events[fd].events = POLLIN;
}
else
{
events[fd].events = POLLOUT;
}
ServerInstance->Logs->Log("SOCKET", DEBUG,"New file descriptor: %d (%d)", fd, events[fd].events);
CurrentSetSize++;
return true;
}
void PollEngine::WantWrite(EventHandler* eh)
{
events[eh->GetFd()].events = POLLIN | POLLOUT;
}
bool PollEngine::DelFd(EventHandler* eh, bool force)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
{
ServerInstance->Logs->Log("SOCKET", DEBUG, "DelFd out of range: (fd: %d, max: %d)", fd, GetMaxFds());
return false;
}
events[fd].fd = -1;
events[fd].events = 0;
CurrentSetSize--;
ref[fd] = NULL;
ServerInstance->Logs->Log("SOCKET", DEBUG, "Remove file descriptor: %d", fd);
return true;
}
int PollEngine::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);
}
return 0;
}
int PollEngine::GetRemainingFds()
{
return MAX_DESCRIPTORS - CurrentSetSize;
}
int PollEngine::DispatchEvents()
{
int i = poll(events, GetMaxFds() - 1, 1000);
int fd = 0;
socklen_t codesize = sizeof(int);
int errcode;
int processed = 0;
if (i > 0)
{
for (fd = 0; fd < GetMaxFds() - 1 && processed != i; fd++)
{
if (events[fd].revents)
processed++;
if (events[fd].revents & POLLHUP)
{
if (ref[fd])
ref[fd]->HandleEvent(EVENT_ERROR, 0);
continue;
}
if (events[fd].revents & POLLERR)
{
// Get error number
if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
errcode = errno;
if (ref[fd])
ref[fd]->HandleEvent(EVENT_ERROR, errcode);
continue;
}
if (events[fd].revents & POLLOUT)
{
// Switch to wanting read again
// event handlers have to request to write again if they need it
events[fd].events = POLLIN;
if (ref[fd])
ref[fd]->HandleEvent(EVENT_WRITE);
}
if (events[fd].revents & POLLIN)
{
if (ref[fd])
ref[fd]->HandleEvent(EVENT_READ);
}
}
}
return i;
}
std::string PollEngine::GetName()
{
return "poll";
}
|
