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
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* +------------------------------------+
* | 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.
*
* ---------------------------------------------------
*/
/* $Core */
#include "inspircd.h"
#include "xline.h"
#include "socketengine.h"
#include "command_parse.h"
void FloodQuitUserHandler::Call(User* current)
{
Server->Logs->Log("USERS",DEFAULT,"Excess flood from: %s@%s", current->ident.c_str(), current->host.c_str());
Server->SNO->WriteToSnoMask('f',"Excess flood from: %s%s%s@%s",
current->registered == REG_ALL ? current->nick.c_str() : "",
current->registered == REG_ALL ? "!" : "", current->ident.c_str(), current->host.c_str());
Server->Users->QuitUser(current, "Excess flood");
if (current->registered != REG_ALL)
{
ZLine* zl = new ZLine(Server, Server->Time(), 0, Server->Config->ServerName, "Flood from unregistered connection", current->GetIPString());
if (Server->XLines->AddLine(zl,NULL))
Server->XLines->ApplyLines();
else
delete zl;
}
}
void ProcessUserHandler::Call(User* cu)
{
int result = EAGAIN;
if (cu->GetFd() == FD_MAGIC_NUMBER)
return;
char* ReadBuffer = Server->GetReadBuffer();
if (cu->GetIOHook())
{
int result2 = 0;
int MOD_RESULT = 0;
try
{
MOD_RESULT = cu->GetIOHook()->OnRawSocketRead(cu->GetFd(), ReadBuffer, Server->Config->NetBufferSize, result2);
}
catch (CoreException& modexcept)
{
Server->Logs->Log("USERS",DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
}
if (MOD_RESULT < 0)
{
result = -EAGAIN;
}
else
{
result = result2;
}
}
else
{
result = cu->ReadData(ReadBuffer, Server->Config->NetBufferSize);
}
if ((result) && (result != -EAGAIN))
{
User *current;
int currfd;
Server->stats->statsRecv += result;
/*
* perform a check on the raw buffer as an array (not a string!) to remove
* character 0 which is illegal in the RFC - replace them with spaces.
*/
for (int checker = 0; checker < result; checker++)
{
if (ReadBuffer[checker] == 0)
ReadBuffer[checker] = ' ';
}
if (result > 0)
ReadBuffer[result] = '\0';
current = cu;
currfd = current->GetFd();
// add the data to the users buffer
if (result > 0)
{
if (!current->AddBuffer(ReadBuffer))
{
// AddBuffer returned false, theres too much data in the user's buffer and theyre up to no good.
if (current->registered == REG_ALL)
{
if (current->MyClass)
{
// Make sure they arn't flooding long lines.
if (Server->Time() > current->reset_due)
{
current->reset_due = Server->Time() + current->MyClass->GetThreshold();
current->lines_in = 0;
}
current->lines_in++;
if (current->MyClass->GetFlood() && current->lines_in > current->MyClass->GetFlood())
Server->FloodQuitUser(current);
else
{
current->WriteServ("NOTICE %s :Your previous line was too long and was not delivered (Over %d chars) Please shorten it.", current->nick.c_str(), MAXBUF-2);
current->recvq.clear();
}
}
}
else
Server->FloodQuitUser(current);
return;
}
/* If user is over penalty, dont process here, just build up */
if (!current->OverPenalty)
Server->Parser->DoLines(current);
return;
}
if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
{
Server->Users->QuitUser(cu, errno ? strerror(errno) : "EOF from client");
return;
}
}
// result EAGAIN means nothing read
else if ((result == EAGAIN) || (result == -EAGAIN))
{
/* do nothing */
}
else if (result == 0)
{
Server->Users->QuitUser(cu, "Connection closed");
return;
}
}
/**
* This function is called once a second from the mainloop.
* It is intended to do background checking on all the user structs, e.g.
* stuff like ping checks, registration timeouts, etc.
*/
void InspIRCd::DoBackgroundUserStuff()
{
/*
* loop over all local users..
*/
for (std::vector<User*>::iterator count2 = this->Users->local_users.begin(); count2 != this->Users->local_users.end(); count2++)
{
User *curr = *count2;
if (curr->quitting)
continue;
if (curr->Penalty)
{
curr->Penalty--;
if (curr->Penalty < 10)
Parser->DoLines(curr, true);
}
if (curr->OverPenalty)
{
if (curr->sendq.empty())
curr->OverPenalty = false;
}
switch (curr->registered)
{
case REG_ALL:
if (TIME > curr->nping)
{
// This user didn't answer the last ping, remove them
if (!curr->lastping)
{
time_t time = this->Time() - (curr->nping - curr->MyClass->GetPingTime());
char message[MAXBUF];
snprintf(message, MAXBUF, "Ping timeout: %ld second%s", (long)time, time > 1 ? "s" : "");
curr->lastping = 1;
curr->nping = TIME + curr->MyClass->GetPingTime();
this->Users->QuitUser(curr, message);
continue;
}
curr->Write("PING :%s",this->Config->ServerName);
curr->lastping = 0;
curr->nping = TIME +curr->MyClass->GetPingTime();
}
break;
case REG_NICKUSER:
if (AllModulesReportReady(curr) && curr->dns_done)
{
/* User has sent NICK/USER, modules are okay, DNS finished. */
curr->FullConnect();
continue;
}
break;
}
if (curr->registered != REG_ALL && (TIME > (curr->age + curr->MyClass->GetRegTimeout())))
{
/*
* registration timeout -- didnt send USER/NICK/HOST
* in the time specified in their connection class.
*/
this->Users->QuitUser(curr, "Registration timeout");
continue;
}
}
}
|
