summaryrefslogtreecommitdiff
path: root/src/modules/m_connflood.cpp
blob: 291074c98c883e8ed02a83f1b07f2c5149115c05 (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
/*   +------------------------------------+
 *   | Inspire Internet Relay Chat Daemon |
 *   +------------------------------------+
 *
 *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
 *                    E-mail:
 *             <brain@chatspike.net>
 *             <Craig@chatspike.net>
 *
 *     --- This module contributed by pippijn ---
 * 
 * Written by Craig Edwards, Craig McLure, and others.
 * This program is free but copyrighted software; see
 * the file COPYING for details.
 *
 * ---------------------------------------------------
 */

using namespace std;

#include "users.h"
#include "modules.h"
#include "helperfuncs.h"
#include "inspircd.h"

/* $ModDesc: Connection throttle */

int conns = 0, throttled = 0;

class ModuleConnFlood : public Module
{
private:
	int seconds, maxconns, timeout, boot_wait;
	time_t first;
	std::string quitmsg;

	ConfigReader* conf;
	

public:
	ModuleConnFlood(InspIRCd* Me) : Module::Module(Me)
	{
		
		InitConf();
	}

	virtual ~ModuleConnFlood()
	{
	}

	virtual Version GetVersion()
	{
		return Version(1,0,0,0,0);
	}

	void Implements(char* List)
	{
		List[I_OnRehash] = List[I_OnUserRegister] = 1;
	}
   
	void InitConf()
	{
		/* read configuration variables */
		conf = new ConfigReader(ServerInstance);
		/* throttle configuration */
		seconds = conf->ReadInteger("connflood", "seconds", 0, true);
		maxconns = conf->ReadInteger("connflood", "maxconns", 0, true);
		timeout = conf->ReadInteger("connflood", "timeout", 0, true);
		quitmsg = conf->ReadValue("connflood", "quitmsg", 0);

		/* seconds to wait when the server just booted */
		boot_wait = conf->ReadInteger("connflood", "bootwait", 0, true);

		first = TIME;
	}
 
	virtual void OnUserRegister(userrec* user)
	{
		time_t next = TIME;
		if (!first)
			first = next - boot_wait;

		/* time difference between first and latest connection */
		time_t tdiff = next - first;

		/* increase connection count */
		conns++;

		if (throttled == 1)
		{
			if (tdiff > seconds + timeout)
			{
				/* expire throttle */
				throttled = 0;
				ServerInstance->WriteOpers("*** Connection throttle deactivated");
				return;
			}
			userrec::QuitUser(ServerInstance, user, quitmsg);
			return;
		}

		if (tdiff <= seconds)
		{
			if (conns >= maxconns)
			{
				throttled = 1;
				ServerInstance->WriteOpers("*** Connection throttle activated");
				userrec::QuitUser(ServerInstance, user, quitmsg);
				return;
			}
		}
		else
		{
			conns = 1;
			first = next;
		}
	}

	virtual void OnRehash(const std::string &parameter)
	{
		InitConf();
	}

};


class ModuleConnFloodFactory : public ModuleFactory
{
public:
	ModuleConnFloodFactory()
	{
	}

	~ModuleConnFloodFactory()
	{
	}
    
	virtual Module * CreateModule(InspIRCd* Me)
	{
		return new ModuleConnFlood(Me);
	}
};


extern "C" void * init_module( void )
{
	return new ModuleConnFloodFactory;
}