summaryrefslogtreecommitdiff
path: root/src/modules/m_ident.cpp
blob: 38fd8fe87c03ce2bac638d544d89017b2cd0eeee (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
/*       +------------------------------------+
 *       | Inspire Internet Relay Chat Daemon |
 *       +------------------------------------+
 *
 *  InspIRCd is copyright (C) 2002-2006 ChatSpike-Dev.
 *                       E-mail:
 *                <brain@chatspike.net>
 *           	  <Craig@chatspike.net>
 *     
 * 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 <stdio.h>
#include <string>
#include "users.h"
#include "channels.h"
#include "modules.h"
#include "inspircd.h"

/* $ModDesc: Provides support for RFC 1413 ident lookups */

// Version 1.5.0.0 - Updated to use InspSocket, faster and neater.

class RFC1413 : public InspSocket
{
 protected:
	Server* Srv;		 // Server* class used for core communications
	userrec* u;		 // user record that the lookup is associated with
	sockaddr_in sock_us;	 // our port number
	sockaddr_in sock_them;	 // their port number
	socklen_t uslen;	 // length of our port number
	socklen_t themlen;	 // length of their port number
	char ident_request[128]; // buffer used to make up the request string
 public:

	RFC1413(userrec* user, int maxtime, Server* S) : InspSocket(user->host, 113, false, maxtime), Srv(S), u(user)
	{
		Srv->Log(DEBUG,"Ident: associated with user "+std::string(user->nick));
	}

	virtual void OnTimeout()
	{
		// When we timeout, the connection failed within the allowed timeframe,
		// so we just display a notice, and tidy off the ident_data.
		u->Shrink("ident_data");
		Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Could not find your ident, using "+std::string(u->ident)+" instead.");
	}

	virtual bool OnDataReady()
	{
		std::string databuf = this->Read();
		if (databuf != "")
		{
			char ibuf[1024];
			strlcpy(ibuf,databuf.c_str(),1024);
			Srv->Log(DEBUG,"Received ident response");
			char* savept;
			char* section = strtok_r(ibuf,":",&savept);
			while (section)
			{
				if (strstr(section,"USERID"))
				{
					section = strtok_r(NULL,":",&savept);
					if (section)
					{
						// ID type, usually UNIX or OTHER... we dont want it, so read the next token
						section = strtok_r(NULL,":",&savept);
						if (section)
						{
							while (*section == ' ') section++; // strip leading spaces
                                                        int t = strlen(section);
                                                        for (int j = 0; j < t; j++)
                                                        if ((section[j] < 33) || (section[j]>126))
								section[j] = '\0'; // truncate at invalid chars
                                                        if (strlen(section))
                                                        {
                                                        	strlcpy(u->ident,section,IDENTMAX);
                                                                Srv->Log(DEBUG,"IDENT SET: "+std::string(u->ident));
                                                                Srv->SendServ(u->fd,"NOTICE "+std::string(u->nick)+" :*** Found your ident: "+std::string(u->ident));
                                                        }
                                                        return false;
						}
					}
				}
				section = strtok_r(NULL,":",&savept);
			}
		}
		return false;
	}

	virtual void OnClose()
	{
		// tidy up after ourselves when the connection is done.
		// We receive this event straight after a timeout, too.
		u->Shrink("ident_data");
	}

	virtual bool OnConnected()
	{
		uslen = sizeof(sock_us);
		themlen = sizeof(sock_them);
		if ((getsockname(this->u->fd,(sockaddr*)&sock_us,&uslen) || getpeername(this->u->fd, (sockaddr*)&sock_them, &themlen)))
		{
			Srv->Log(DEBUG,"Ident: failed to get socket names, bailing");
			return false;
		}
		else
		{
			// send the request in the following format: theirsocket,oursocket
			snprintf(ident_request,127,"%d,%d\r\n",ntohs(sock_them.sin_port),ntohs(sock_us.sin_port));
			this->Write(ident_request);
			Srv->Log(DEBUG,"Sent ident request, waiting for reply");
			return true;
		}
	}
};

class ModuleIdent : public Module
{

	ConfigReader* Conf;
	Server* Srv;
	int IdentTimeout;

 public:
	void ReadSettings()
	{
		Conf = new ConfigReader;
		IdentTimeout = Conf->ReadInteger("ident","timeout",0,true);
		if (!IdentTimeout)
			IdentTimeout = 1;
		delete Conf;
	}

	ModuleIdent(Server* Me)
		: Module::Module(Me)
	{
		Srv = Me;
		ReadSettings();
	}

	void Implements(char* List)
	{
		List[I_OnRehash] = List[I_OnUserRegister] = List[I_OnCheckReady] = List[I_OnUserDisconnect] = 1;
	}

	virtual void OnRehash(std::string parameter)
	{
		ReadSettings();
	}

	virtual void OnUserRegister(userrec* user)
	{
		// when the new user connects, before they authenticate with USER/NICK/PASS, we do
		// their ident lookup. We do this by instantiating an object of type RFC1413, which
		// is derived from InspSocket, and inserting it into the socket engine using the
		// Server::AddSocket() call.
		Srv->SendServ(user->fd,"NOTICE "+std::string(user->nick)+" :*** Looking up your ident...");
		RFC1413* ident = new RFC1413(user, IdentTimeout, Srv);
		user->Extend("ident_data", (char*)ident);
		Srv->AddSocket(ident);
	}

	virtual bool OnCheckReady(userrec* user)
	{
		// The socket engine will clean up their ident request for us when it completes,
		// either due to timeout or due to closing, so, we just hold them until they dont
		// have an ident field any more.
		RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
		return (!ident);
	}

        virtual void OnUserDisconnect(userrec* user)
        {
                // when the user quits tidy up any ident lookup they have pending to keep things tidy.
                // When we call RemoveSocket, the abstractions tied into the system evnetually work their
		// way to RFC1459::OnClose(), which shrinks off the ident_data for us, so we dont need
		// to do it here. If we don't tidy this up, there may still be lingering idents for users
		// who have quit, as class RFC1459 is only loosely bound to userrec* via a pair of pointers
		// and this would leave at least one of the invalid ;)
		RFC1413* ident = (RFC1413*)user->GetExt("ident_data");
                if (ident)
                {
			Srv->RemoveSocket(ident);
                }
        }
	
	virtual ~ModuleIdent()
	{
	}
	
	virtual Version GetVersion()
	{
		return Version(1,5,0,0,VF_VENDOR);
	}
	
};

class ModuleIdentFactory : public ModuleFactory
{
 public:
	ModuleIdentFactory()
	{
	}
	
	~ModuleIdentFactory()
	{
	}
	
	virtual Module * CreateModule(Server* Me)
	{
		return new ModuleIdent(Me);
	}
	
};


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