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
|
/* +------------------------------------+
* | 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 <sys/types.h>
#include <sys/event.h>
#include <sys/time.h>
#include "socketengines/socketengine_kqueue.h"
#include <sys/sysctl.h>
KQueueEngine::KQueueEngine()
{
MAX_DESCRIPTORS = 0;
this->RecoverFromFork();
ke_list = new struct kevent[GetMaxFds()];
ref = new EventHandler* [GetMaxFds()];
memset(ref, 0, GetMaxFds() * sizeof(EventHandler*));
}
void KQueueEngine::RecoverFromFork()
{
/*
* The only bad thing about kqueue is that its fd cant survive a fork and is not inherited.
* BUM HATS.
*
*/
EngineHandle = kqueue();
if (EngineHandle == -1)
{
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);
}
CurrentSetSize = 0;
}
KQueueEngine::~KQueueEngine()
{
this->Close(EngineHandle);
delete[] ref;
delete[] ke_list;
}
bool KQueueEngine::AddFd(EventHandler* eh, int event_mask)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > GetMaxFds() - 1))
return false;
if (ref[fd])
return false;
// We always want to read from the socket...
struct kevent ke;
EV_SET(&ke, fd, EVFILT_READ, EV_ADD, 0, 0, NULL);
int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
if (i == -1)
{
ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to add fd: %d %s",
fd, strerror(errno));
return false;
}
if (event_mask & (FD_WANT_POLL_WRITE | FD_WANT_FAST_WRITE)) {
// ...and sometimes want to write
WantWrite(eh);
}
ref[fd] = eh;
SocketEngine::SetEventMask(eh, event_mask);
CurrentSetSize++;
ServerInstance->Logs->Log("SOCKET",DEBUG,"New file descriptor: %d", fd);
return true;
}
bool KQueueEngine::DelFd(EventHandler* eh, bool force)
{
int fd = eh->GetFd();
if ((fd < 0) || (fd > GetMaxFds() - 1))
{
ServerInstance->Logs->Log("SOCKET",DEFAULT,"DelFd() on invalid fd: %d", fd);
return false;
}
struct kevent ke;
// First remove the write filter ignoring errors, since we can't be
// sure if there are actually any write filters registered.
EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
kevent(EngineHandle, &ke, 1, 0, 0, NULL);
// Then remove the read filter.
EV_SET(&ke, eh->GetFd(), EVFILT_READ, EV_DELETE, 0, 0, NULL);
int j = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
if ((j < 0) && !force)
{
ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to remove fd: %d %s",
fd, strerror(errno));
return false;
}
CurrentSetSize--;
ref[fd] = NULL;
ServerInstance->Logs->Log("SOCKET",DEBUG,"Remove file descriptor: %d", fd);
return true;
}
void KQueueEngine::OnSetEvent(EventHandler* eh, int old_mask, int new_mask)
{
if ((new_mask & FD_WANT_POLL_WRITE) && !(old_mask & FD_WANT_POLL_WRITE))
{
// new poll-style write
struct kevent ke;
EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD, 0, 0, NULL);
int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
if (i < 0) {
ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s",
eh->GetFd(), strerror(errno));
}
}
else if ((old_mask & FD_WANT_POLL_WRITE) && !(new_mask & FD_WANT_POLL_WRITE))
{
// removing poll-style write
struct kevent ke;
EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_DELETE, 0, 0, NULL);
int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
if (i < 0) {
ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s",
eh->GetFd(), strerror(errno));
}
}
if ((new_mask & FD_WANT_EDGE_WRITE) && !(old_mask & FD_WANT_EDGE_WRITE))
{
// new one-shot write
struct kevent ke;
EV_SET(&ke, eh->GetFd(), EVFILT_WRITE, EV_ADD | EV_ONESHOT, 0, 0, NULL);
int i = kevent(EngineHandle, &ke, 1, 0, 0, NULL);
if (i < 0) {
ServerInstance->Logs->Log("SOCKET",DEFAULT,"Failed to mark for writing: %d %s",
eh->GetFd(), strerror(errno));
}
}
}
int KQueueEngine::DispatchEvents()
{
ts.tv_nsec = 0;
ts.tv_sec = 1;
int i = kevent(EngineHandle, NULL, 0, &ke_list[0], GetMaxFds(), &ts);
TotalEvents += i;
for (int j = 0; j < i; j++)
{
EventHandler* eh = ref[ke_list[j].ident];
if (!eh)
continue;
if (ke_list[j].flags & EV_EOF)
{
ErrorEvents++;
eh->HandleEvent(EVENT_ERROR, ke_list[j].fflags);
continue;
}
if (ke_list[j].filter == EVFILT_WRITE)
{
WriteEvents++;
/* When mask is FD_WANT_FAST_WRITE, we set a one-shot
* write, so we need to clear that bit to detect when it
* set again.
*/
const int bits_to_clr = FD_WANT_FAST_WRITE | FD_WRITE_WILL_BLOCK;
SetEventMask(eh, eh->GetEventMask() & ~bits_to_clr);
eh->HandleEvent(EVENT_WRITE);
}
if (ke_list[j].filter == EVFILT_READ)
{
ReadEvents++;
SetEventMask(eh, eh->GetEventMask() & ~FD_READ_WILL_BLOCK);
eh->HandleEvent(EVENT_READ);
}
}
return i;
}
std::string KQueueEngine::GetName()
{
return "kqueue";
}
|
