summaryrefslogtreecommitdiff
path: root/src/modules/m_remove.cpp
blob: 16cc8a67935d0f530161a452d1081a36663bfc5f (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
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
/*       +------------------------------------+
 *       | 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 <sstream>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "configreader.h"
#include "inspircd.h"

/* $ModDesc: Provides a /remove command, this is mostly an alternative to /kick, except makes users appear to have parted the channel */

/*	
 * This module supports the use of the +q and +a usermodes, but should work without them too.
 * Usage of the command is restricted to +hoaq, and you cannot remove a user with a "higher" level than yourself.
 * eg: +h can remove +hv and users with no modes. +a can remove +aohv and users with no modes.
*/

/** Base class for /FPART and /REMOVE
 */
class RemoveBase
{
 private: 
	bool& supportnokicks;
	InspIRCd* ServerInstance;
 
 protected:
	RemoveBase(InspIRCd* Instance, bool& snk) : supportnokicks(snk), ServerInstance(Instance)
	{
	}		
 
	enum ModeLevel { PEON = 0, HALFOP = 1, OP = 2, ADMIN = 3, OWNER = 4, ULINE = 5 };	 
 
	/* This little function just converts a chanmode character (U ~ & @ & +) into an integer (5 4 3 2 1 0) */
	/* XXX - We should probably use the new mode prefix rank stuff
	 * for this instead now -- Brain */
	ModeLevel chartolevel(const std::string &privs)
	{
		if(privs.empty())
		{
			return PEON;
		}
	
		switch (privs[0])
		{
			case 'U':
				/* Ulined */
				return ULINE;
			case '~':
				/* Owner */
				return OWNER;
			case '&':
				/* Admin */
				return ADMIN;
			case '@':
				/* Operator */
				return OP;
			case '%':
				/* Halfop */
				return HALFOP;
			default:
				/* Peon */
				return PEON;
		}
	}
	
	CmdResult Handle (const char** parameters, int pcnt, userrec *user, bool neworder)
	{
		const char* channame;
		const char* username;
		userrec* target;
		chanrec* channel;
		ModeLevel tlevel;
		ModeLevel ulevel;
		std::string reason;
		std::string protectkey;
		std::string founderkey;
		bool hasnokicks;
		
		/* Set these to the parameters needed, the new version of this module switches it's parameters around
		 * supplying a new command with the new order while keeping the old /remove with the older order.
		 * /remove <nick> <channel> [reason ...]
		 * /fpart <channel> <nick> [reason ...]
		 */
		channame = parameters[ neworder ? 0 : 1];
		username = parameters[ neworder ? 1 : 0];
		
		/* Look up the user we're meant to be removing from the channel */
		target = ServerInstance->FindNick(username);
		
		/* And the channel we're meant to be removing them from */
		channel = ServerInstance->FindChan(channame);

		/* Fix by brain - someone needs to learn to validate their input! */
		if (!target || !channel)
		{
			user->WriteServ("401 %s %s :No such nick/channel", user->nick, !target ? username : channame);
			return CMD_FAILURE;
		}

		if (!channel->HasUser(target))
		{
			user->WriteServ( "NOTICE %s :*** The user %s is not on channel %s", user->nick, target->nick, channel->name);
			return CMD_FAILURE;
		}	
		
		/* This is adding support for the +q and +a channel modes, basically if they are enabled, and the remover has them set.
		 * Then we change the @|%|+ to & if they are +a, or ~ if they are +q */
		protectkey = "cm_protect_" + std::string(channel->name);
		founderkey = "cm_founder_" + std::string(channel->name);
		
		if (ServerInstance->ULine(user->server) || ServerInstance->ULine(user->nick))
		{
			ServerInstance->Log(DEBUG, "Setting ulevel to U");
			ulevel = chartolevel("U");
		}
		if (user->GetExt(founderkey))
		{
			ServerInstance->Log(DEBUG, "Setting ulevel to ~");
			ulevel = chartolevel("~");
		}
		else if (user->GetExt(protectkey))
		{
			ServerInstance->Log(DEBUG, "Setting ulevel to &");
			ulevel = chartolevel("&");
		}
		else
		{
			ServerInstance->Log(DEBUG, "Setting ulevel to %s", channel->GetPrefixChar(user));
			ulevel = chartolevel(channel->GetPrefixChar(user));
		}
			
		/* Now it's the same idea, except for the target. If they're ulined make sure they get a higher level than the sender can */
		if (ServerInstance->ULine(target->server) || ServerInstance->ULine(target->nick))
		{
			ServerInstance->Log(DEBUG, "Setting tlevel to U");
			tlevel = chartolevel("U");
		}
		else if (target->GetExt(founderkey))
		{
			ServerInstance->Log(DEBUG, "Setting tlevel to ~");
			tlevel = chartolevel("~");
		}
		else if (target->GetExt(protectkey))
		{
			ServerInstance->Log(DEBUG, "Setting tlevel to &");
			tlevel = chartolevel("&");
		}
		else
		{
			ServerInstance->Log(DEBUG, "Setting tlevel to %s", channel->GetPrefixChar(target));
			tlevel = chartolevel(channel->GetPrefixChar(target));
		}
		
		hasnokicks = (ServerInstance->FindModule("m_nokicks.so") && channel->IsModeSet('Q'));
		
		/* We support the +Q channel mode via. the m_nokicks module, if the module is loaded and the mode is set then disallow the /remove */
		if ((!IS_LOCAL(user)) || (!supportnokicks || !hasnokicks || (ulevel == ULINE)))
		{
			/* We'll let everyone remove their level and below, eg:
			 * ops can remove ops, halfops, voices, and those with no mode (no moders actually are set to 1)
			 * a ulined target will get a higher level than it's possible for a /remover to get..so they're safe.
			 * Nobody may remove a founder.
			 */
			if ((!IS_LOCAL(user)) || ((ulevel > PEON) && (ulevel >= tlevel) && (tlevel != OWNER)))
			{
				// no you can't just go from a std::ostringstream to a std::string, Om. -nenolod
				// but you can do this, nenolod -brain

				std::string reasonparam("No reason given");
				
				/* If a reason is given, use it */
				if(pcnt > 2)
				{
					/* Join params 2 ... pcnt - 1 (inclusive) into one */
					irc::stringjoiner reason_join(" ", parameters, 2, pcnt - 1);
					reasonparam = reason_join.GetJoined();
				}

				/* Build up the part reason string. */
				reason = std::string("Removed by ") + user->nick + ": " + reasonparam;

				channel->WriteChannelWithServ(ServerInstance->Config->ServerName, "NOTICE %s :%s removed %s from the channel", channel->name, user->nick, target->nick);
				target->WriteServ("NOTICE %s :*** %s removed you from %s with the message: %s", target->nick, user->nick, channel->name, reasonparam.c_str());

				if (!channel->PartUser(target, reason.c_str()))
					delete channel;
			}
			else
			{
				user->WriteServ( "NOTICE %s :*** You do not have access to /remove %s from %s", user->nick, target->nick, channel->name);
				return CMD_FAILURE;
			}
		}
		else
		{
			/* m_nokicks.so was loaded and +Q was set, block! */
			user->WriteServ( "484 %s %s :Can't remove user %s from channel (+Q set)", user->nick, channel->name, target->nick);
			return CMD_FAILURE;
		}

		return CMD_SUCCESS;
	}
};

/** Handle /REMOVE
 */
class cmd_remove : public command_t, public RemoveBase
{
 public:
	cmd_remove(InspIRCd* Instance, bool& snk) : command_t(Instance, "REMOVE", 0, 2), RemoveBase(Instance, snk)
	{
		this->source = "m_remove.so";
		syntax = "<nick> <channel> [<reason>]";
	}
	
	CmdResult Handle (const char** parameters, int pcnt, userrec *user)
	{
		return RemoveBase::Handle(parameters, pcnt, user, false);
	}
};

/** Handle /FPART
 */
class cmd_fpart : public command_t, public RemoveBase
{
 public:
	cmd_fpart(InspIRCd* Instance, bool& snk) : command_t(Instance, "FPART", 0, 2), RemoveBase(Instance, snk)
	{
		this->source = "m_remove.so";
		syntax = "<channel> <nick> [<reason>]";
	}

	CmdResult Handle (const char** parameters, int pcnt, userrec *user)
	{
		return RemoveBase::Handle(parameters, pcnt, user, true);
	}
};

class ModuleRemove : public Module
{
	cmd_remove* mycommand;
	cmd_fpart* mycommand2;
	bool supportnokicks;
	
	
 public:
	ModuleRemove(InspIRCd* Me)
	: Module::Module(Me)
	{
		mycommand = new cmd_remove(ServerInstance, supportnokicks);
		mycommand2 = new cmd_fpart(ServerInstance, supportnokicks);
		ServerInstance->AddCommand(mycommand);
		ServerInstance->AddCommand(mycommand2);
		OnRehash(NULL,"");
	}

	void Implements(char* List)
	{
		List[I_On005Numeric] = List[I_OnRehash] = 1;
	}

	virtual void On005Numeric(std::string &output)
	{
		output.append(" REMOVE");
	}
	
	virtual void OnRehash(userrec* user, const std::string&)
	{
		ConfigReader conf(ServerInstance);
		supportnokicks = conf.ReadFlag("remove", "supportnokicks", 0);
	}
	
	virtual ~ModuleRemove()
	{
		delete mycommand;
		delete mycommand2;
	}
	
	virtual Version GetVersion()
	{
		return Version(1,1,1,0,VF_VENDOR,API_VERSION);
	}
	
};

// stuff down here is the module-factory stuff. For basic modules you can ignore this.

class ModuleRemoveFactory : public ModuleFactory
{
 public:
	ModuleRemoveFactory()
	{
	}
	
	~ModuleRemoveFactory()
	{
	}
	
	virtual Module * CreateModule(InspIRCd* Me)
	{
		return new ModuleRemove(Me);
	}
	
};


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