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
|
/* +------------------------------------+
* | Inspire Internet Relay Chat Daemon |
* +------------------------------------+
*
* InspIRCd: (C) 2002-2007 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 <sys/epoll.h>
#include "socketengines/socketengine_epoll.h"
EPollEngine::EPollEngine(InspIRCd* Instance) : SocketEngine(Instance)
{
EngineHandle = epoll_create(MAX_DESCRIPTORS);
if (EngineHandle == -1)
{
ServerInstance->Log(SPARSE,"ERROR: Could not initialize socket engine: %s", strerror(errno));
ServerInstance->Log(SPARSE,"ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.");
printf("ERROR: Could not initialize socket engine: %s\n", strerror(errno));
printf("ERROR: Your kernel probably does not have the proper features. This is a fatal error, exiting now.\n");
ServerInstance->Exit(EXIT_STATUS_SOCKETENGINE);
}
CurrentSetSize = 0;
}
EPollEngine::~EPollEngine()
{
this->Close(EngineHandle);
}
bool EPollEngine::AddFd(EventHandler* eh)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
{
ServerInstance->Log(DEBUG,"Out of range FD");
return false;
}
if (GetRemainingFds() <= 1)
return false;
if (ref[fd])
return false;
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
ev.data.fd = fd;
int i = epoll_ctl(EngineHandle, EPOLL_CTL_ADD, fd, &ev);
if (i < 0)
{
return false;
}
ServerInstance->Log(DEBUG,"New file descriptor: %d", fd);
ref[fd] = eh;
CurrentSetSize++;
return true;
}
void EPollEngine::WantWrite(EventHandler* eh)
{
/** Use oneshot so that the system removes the writeable
* status for us and saves us a call.
*/
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
ev.events = EPOLLOUT;
ev.data.fd = eh->GetFd();
epoll_ctl(EngineHandle, EPOLL_CTL_MOD, eh->GetFd(), &ev);
}
bool EPollEngine::DelFd(EventHandler* eh, bool force)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > MAX_DESCRIPTORS))
return false;
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
eh->Readable() ? ev.events = EPOLLIN : ev.events = EPOLLOUT;
ev.data.fd = fd;
int i = epoll_ctl(EngineHandle, EPOLL_CTL_DEL, fd, &ev);
if (i < 0 && !force)
{
ServerInstance->Log(DEBUG,"Cant remove socket: %s", strerror(errno));
return false;
}
ref[fd] = NULL;
CurrentSetSize--;
ServerInstance->Log(DEBUG,"Remove file descriptor: %d", fd);
return true;
}
int EPollEngine::GetMaxFds()
{
return MAX_DESCRIPTORS;
}
int EPollEngine::GetRemainingFds()
{
return MAX_DESCRIPTORS - CurrentSetSize;
}
int EPollEngine::DispatchEvents()
{
socklen_t codesize;
int errcode;
int i = epoll_wait(EngineHandle, events, MAX_DESCRIPTORS, 1000);
for (int j = 0; j < i; j++)
{
if (events[j].events & EPOLLHUP)
{
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, 0);
continue;
}
if (events[j].events & EPOLLERR)
{
/* Get error number */
if (getsockopt(events[j].data.fd, SOL_SOCKET, SO_ERROR, &errcode, &codesize) < 0)
errcode = errno;
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_ERROR, errcode);
continue;
}
if (events[j].events & EPOLLOUT)
{
struct epoll_event ev;
memset(&ev,0,sizeof(struct epoll_event));
ev.events = EPOLLIN;
ev.data.fd = events[j].data.fd;
epoll_ctl(EngineHandle, EPOLL_CTL_MOD, events[j].data.fd, &ev);
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_WRITE);
}
else
{
if (ref[events[j].data.fd])
ref[events[j].data.fd]->HandleEvent(EVENT_READ);
}
}
return i;
}
std::string EPollEngine::GetName()
{
return "epoll";
}
|
