summaryrefslogtreecommitdiff
path: root/src/userprocess.cpp
blob: 36523e522b3924c01521c67737529b09c38d2ed3 (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
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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
/*       +------------------------------------+
 *       | 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 "configreader.h"
#include "users.h"
#include "modules.h"
#include "wildcard.h"
#include "xline.h"
#include "socketengine.h"
#include "command_parse.h"

void InspIRCd::FloodQuitUser(userrec* current)
{
	this->Log(DEFAULT,"Excess flood from: %s@%s", current->ident, current->host);
	this->SNO->WriteToSnoMask('f',"Excess flood from: %s%s%s@%s",
			current->registered == REG_ALL ? current->nick : "",
			current->registered == REG_ALL ? "!" : "", current->ident, current->host);
	current->SetWriteError("Excess flood");
	if (current->registered != REG_ALL)
	{
		XLines->add_zline(120,this->Config->ServerName,"Flood from unregistered connection",current->GetIPString());
		XLines->apply_lines(APPLY_ZLINES);
	}
}

void InspIRCd::ProcessUser(userrec* cu)
{
	int result = EAGAIN;

	if (cu->GetFd() == FD_MAGIC_NUMBER)
		return;

	if (this->Config->GetIOHook(cu->GetPort()))
	{
		int result2 = 0;
		int MOD_RESULT = 0;

		try
		{
			MOD_RESULT = this->Config->GetIOHook(cu->GetPort())->OnRawSocketRead(cu->GetFd(),ReadBuffer,sizeof(ReadBuffer),result2);
		}
		catch (CoreException& modexcept)
		{
			this->Log(DEBUG, "%s threw an exception: %s", modexcept.GetSource(), modexcept.GetReason());
		}

		if (MOD_RESULT < 0)
		{
			result = -EAGAIN;
		}
		else
		{
			result = result2;
		}
	}
	else
	{
		result = cu->ReadData(ReadBuffer, sizeof(ReadBuffer));
	}

	if ((result) && (result != -EAGAIN))
	{
		userrec *current;
		int currfd;
		int floodlines = 0;

		this->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.
		 * XXX - no garauntee there's not \0's in the middle of the data,
		 *       and no reason for it to be terminated either. -- Om
		 */

		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)
				{
					// Make sure they arn't flooding long lines.
					if (TIME > current->reset_due)
					{
						current->reset_due = TIME + current->threshold;
						current->lines_in = 0;
					}

					current->lines_in++;

					if (current->flood && current->lines_in > current->flood)
						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, MAXBUF-2);
						current->recvq.clear();
					}
				}
				else
					FloodQuitUser(current);

				return;
			}

			// while there are complete lines to process...
			while (current->BufferIsReady())
			{
				if (TIME > current->reset_due)
				{
					current->reset_due = TIME + current->threshold;
					current->lines_in = 0;
				}

				if (++current->lines_in > current->flood && current->flood)
				{
					FloodQuitUser(current);
					return;
				}

				if ((++floodlines > current->flood) && (current->flood != 0))
				{
					FloodQuitUser(current);
					return;
				}

				// use GetBuffer to copy single lines into the sanitized string
				std::string single_line = current->GetBuffer();
				current->bytes_in += single_line.length();
				current->cmds_in++;
				if (single_line.length() > MAXBUF - 2)	/* MAXBUF is 514 to allow for neccessary line terminators */
					single_line.resize(MAXBUF - 2); /* So to trim to 512 here, we use MAXBUF - 2 */

				EventHandler* old_comp = this->SE->GetRef(currfd);

				this->Parser->ProcessBuffer(single_line,current);
				/*
				 * look for the user's record in case it's changed... if theyve quit,
				 * we cant do anything more with their buffer, so bail.
				 * there used to be an ugly, slow loop here. Now we have a reference
				 * table, life is much easier (and FASTER)
				 */
				EventHandler* new_comp = this->SE->GetRef(currfd);

				if (new_comp != old_comp)
					return;
			}

			return;
		}

		if ((result == -1) && (errno != EAGAIN) && (errno != EINTR))
		{
			cu->SetWriteError(strerror(errno));
			return;
		}
	}

	// result EAGAIN means nothing read
	else if ((result == EAGAIN) || (result == -EAGAIN))
	{
		/* do nothing */
	}
	else if (result == 0)
	{
		cu->SetWriteError("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(time_t TIME)
{
	/* Is it time yet? */
	if (TIME < next_call)
		return;
	else
	{
		/* Time we actually need to call this again */
		const time_t DUMMY_VALUE = 32768;
		next_call = TIME + DUMMY_VALUE;

		/* XXX: IT IS NOT SAFE TO USE AN ITERATOR HERE. DON'T EVEN THINK ABOUT IT. */
		for (unsigned long count2 = 0; count2 != this->local_users.size(); count2++)
		{
			if (count2 >= this->local_users.size())
				break;

			userrec* curr = this->local_users[count2];

			if (curr)
			{
				/*
				 * registration timeout -- didnt send USER/NICK/HOST
				 * in the time specified in their connection class.
				 */
				if ((TIME > curr->timeout) && (curr->registered != REG_ALL))
				{
					curr->muted = true;
					GlobalCulls.AddItem(curr,"Registration timeout");
					continue;
				}
				else
				{
					if ((curr->registered != REG_ALL) && (next_call > (time_t)curr->timeout))
						next_call = curr->timeout;
				}

				/*
				 * user has signed on with USER/NICK/PASS, and dns has completed, all the modules
				 * say this user is ok to proceed, fully connect them.
				 */
				bool ready = AllModulesReportReady(curr);
				if ((TIME > curr->signon) && (curr->registered == REG_NICKUSER) && (ready))
				{
					if (!curr->dns_done)
					{
						curr->WriteServ("NOTICE Auth :*** Could not resolve your hostname: Request timed out; using your IP address (%s) instead.", curr->GetIPString());
						curr->dns_done = true;
					}
					this->stats->statsDnsBad++;
					curr->FullConnect();
					continue;
				}
				else
				{
					if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon))
						next_call = curr->signon;
				}

				if ((curr->dns_done) && (curr->registered == REG_NICKUSER) && (ready))
				{
					curr->FullConnect();
					continue;
				}
				else
				{
					if ((curr->registered == REG_NICKUSER) && (ready) && (next_call > curr->signon + this->Config->dns_timeout))
						next_call = curr->signon + this->Config->dns_timeout;
				}

				// It's time to PING this user. Send them a ping.
				if ((TIME > curr->nping) && (curr->registered == REG_ALL))
				{
					// This user didn't answer the last ping, remove them
					if (!curr->lastping)
					{
						/* Everybody loves boobies. */
						time_t time = this->Time(false) - (curr->nping - curr->pingmax);
						char message[MAXBUF];
						snprintf(message, MAXBUF, "Ping timeout: %d second%s", time, time > 1 ? "s" : "");
						curr->muted = true;
						GlobalCulls.AddItem(curr, message);
						curr->lastping = 1;
						curr->nping = TIME+curr->pingmax;
						continue;
					}
					curr->Write("PING :%s",this->Config->ServerName);
					curr->lastping = 0;
					curr->nping = TIME+curr->pingmax;
				}
				else
				{
					if ((curr->registered == REG_ALL) && (next_call > curr->nping))
						next_call = curr->nping;
				}
			}
		}

		/* If theres nothing to do, trigger in the next second, something might come up */
		time_t delta = next_call - TIME;
		if (delta == DUMMY_VALUE)
		{
			next_call = TIME + 1;
			delta = 1;
		}
	}
}