ircd-hybrid/contrib/m_change.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_change.c: Allows changing user/host/real of connected clients.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

/* List of ircd includes from ../include/ */
#include "stdinc.h"
#include "handlers.h"
#include "client.h"
#include "common.h"     /* FALSE bleah */
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_user.h"
#include "hash.h"

static void mo_chgident(struct Client *, struct Client *, int, char *[]);
static void mo_chghost(struct Client *, struct Client *, int, char *[]);
static void mo_chgname(struct Client *, struct Client *, int, char *[]);

struct Message chgident_msgtab = {
  "CHGIDENT", 0, 0, 2, 0, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, mo_chgident, mo_chgident, mo_chgident, m_ignore }
};

struct Message chghost_msgtab = {
  "CHGHOST", 0, 0, 2, 0, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, mo_chghost, mo_chghost, mo_chghost, m_ignore }
};

struct Message chgname_msgtab = {
  "CHGNAME", 0, 0, 2, 0, MFLG_SLOW, 0,
  { m_unregistered, m_not_oper, mo_chgname, mo_chgname, mo_chgname, m_ignore }
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&chgident_msgtab);
  mod_add_cmd(&chghost_msgtab);
  mod_add_cmd(&chgname_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&chgname_msgtab);
  mod_del_cmd(&chghost_msgtab);
  mod_del_cmd(&chgident_msgtab);
}

const char *_version = "$Revision$";
#endif

static void
mo_chgident(struct Client *client_p, struct Client *source_p,
            int parc, char *parv[])
{
  struct Client *target_p = NULL;

  if (MyClient(source_p) && !IsOperAdmin(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, parv[0], "CHGIDENT");
    return;
  }

  if (EmptyString(parv[2]))
  {
    parv[2] = parv[1];

    target_p = source_p;
    if (!IsClient(target_p))
      return;
  }
  else {
    target_p = find_client(parv[1]);

    if (target_p == NULL || !IsClient(target_p))
    {
      sendto_one(source_p, form_str(ERR_NOSUCHNICK),
                 me.name, parv[0], parv[1]);
      return;
    }
  }

  if (strlen(parv[2]) > USERLEN || !*parv[2] || !valid_username(parv[2]))
  {
    sendto_one(source_p, ":%s NOTICE %s :Invalid username", me.name, parv[0]);
    return;
  }

  strcpy(target_p->username, parv[2]);
  
  if (MyClient(source_p))
  {
    sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
                  ":%s ENCAP * CHGIDENT %s %s",
                  parv[0], target_p->name, parv[2]);
    sendto_one(source_p, ":%s NOTICE %s :%s changed to %s@%s",
               me.name, parv[0], target_p->name, target_p->username,
               target_p->host);
  }

  if (MyConnect(target_p) && IsClient(source_p))
    sendto_one(target_p, ":%s NOTICE %s :You are now %s@%s",
               me.name, target_p->name, target_p->username, target_p->host);
}

static void
mo_chghost(struct Client *client_p, struct Client *source_p,
           int parc, char *parv[])
{
  struct Client *target_p = NULL;

  if (MyClient(source_p) && !IsOperAdmin(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, parv[0], "CHGHOST");
    return;
  }

  if (EmptyString(parv[2]))
  {
    parv[2] = parv[1];

    target_p = source_p;
    if (!IsClient(target_p))
      return;
  }
  else {
    target_p = find_client(parv[1]);
    if (target_p == NULL || !IsClient(target_p))
    {
      sendto_one(source_p, form_str(ERR_NOSUCHNICK),
                 me.name, parv[0], parv[1]);
      return;
    }
  }

  if (strlen(parv[2]) > HOSTLEN || !*parv[2] || !valid_hostname(parv[2]))
  {
    sendto_one(source_p, ":%s NOTICE %s :Invalid hostname", me.name, parv[0]);
    return;
  }

  strcpy(target_p->host, parv[2]);
  SetIPSpoof(target_p);
  
  if (MyClient(source_p))
  {
    sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
                  ":%s ENCAP * CHGHOST %s :%s",
                  parv[0], target_p->name, parv[2]);
    sendto_one(source_p, ":%s NOTICE %s :%s changed to %s@%s",
               me.name, parv[0], target_p->name, target_p->username,
               target_p->host);
  }

  if (MyConnect(target_p) && IsClient(source_p))
    sendto_one(target_p, ":%s NOTICE %s :You are now %s@%s",
               me.name, target_p->name, target_p->username, target_p->host);
}

static void
mo_chgname(struct Client *client_p, struct Client *source_p,
          int parc, char *parv[])
{
  struct Client *target_p = NULL;

  if (MyClient(source_p) && !IsOperAdmin(source_p))
  {
    sendto_one(source_p, form_str(ERR_NOPRIVS),
               me.name, parv[0], "CHGNAME");
    return;
  }

  if (EmptyString(parv[2]))
  {
    parv[2] = parv[1];
    target_p = source_p;
  }
  else if ((target_p = find_client(parv[1])) == NULL)
  {
    sendto_one(source_p, form_str(ERR_NOSUCHNICK),
               me.name, parv[0], parv[1]);
    return;
  }

  if (strlen(parv[2]) > REALLEN || !*parv[2])
  {
    sendto_one(source_p, ":%s NOTICE %s :Invalid realname", me.name, parv[0]);
    return;
  }

  if (parc > 3 && MyClient(source_p))
    sendto_one(source_p, ":%s NOTICE %s :Warning -- too many parameters "
               "for CHGNAME. You are probably missing a : before the new "
               "IRC name.", me.name, parv[0]);

  strcpy(target_p->info, parv[2]);
  
  if (MyClient(source_p))
  {
    sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
                  ":%s ENCAP * CHGNAME %s :%s",
                  parv[0], target_p->name, parv[2]);
    sendto_one(source_p, ":%s NOTICE %s :%s realname changed to [%s]",
               me.name, parv[0], target_p->name, target_p->info);
  }

  if (MyClient(target_p) && IsClient(source_p))
    sendto_one(target_p, ":%s NOTICE %s :Your realname is now [%s]",
               me.name, target_p->name, target_p->info);
}
Revision:	344
Committed:	Sat Dec 31 09:41:44 2005 UTC (20 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	6716 byte(s)
Log Message:	- Flag the client as being ip-spoofed if setting a new hostname via CHGHOST, that way non-opers can't figure out the IP with a simple WHOIS. Suggested by adx
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_change.c: Allows changing user/host/real of connected clients.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
7			* This program is free software; you can redistribute it and/or modify
8			* it under the terms of the GNU General Public License as published by
9			* the Free Software Foundation; either version 2 of the License, or
10			* (at your option) any later version.
11			*
12			* This program is distributed in the hope that it will be useful,
13			* but WITHOUT ANY WARRANTY; without even the implied warranty of
14			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15			* GNU General Public License for more details.
16			*
17			* You should have received a copy of the GNU General Public License
18			* along with this program; if not, write to the Free Software
19			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			/* List of ircd includes from ../include/ */
26			#include "stdinc.h"
27			#include "handlers.h"
28			#include "client.h"
29			#include "common.h" /* FALSE bleah */
30			#include "ircd.h"
31			#include "numeric.h"
32			#include "s_conf.h"
33			#include "s_serv.h"
34			#include "send.h"
35			#include "msg.h"
36			#include "parse.h"
37			#include "modules.h"
38			#include "s_user.h"
39			#include "hash.h"
40
41			static void mo_chgident(struct Client , struct Client , int, char *[]);
42			static void mo_chghost(struct Client , struct Client , int, char *[]);
43			static void mo_chgname(struct Client , struct Client , int, char *[]);
44
45			struct Message chgident_msgtab = {
46			"CHGIDENT", 0, 0, 2, 0, MFLG_SLOW, 0,
47	michael	344	{ m_unregistered, m_not_oper, mo_chgident, mo_chgident, mo_chgident, m_ignore }
48	adx	30	};
49
50			struct Message chghost_msgtab = {
51			"CHGHOST", 0, 0, 2, 0, MFLG_SLOW, 0,
52	michael	344	{ m_unregistered, m_not_oper, mo_chghost, mo_chghost, mo_chghost, m_ignore }
53	adx	30	};
54
55			struct Message chgname_msgtab = {
56			"CHGNAME", 0, 0, 2, 0, MFLG_SLOW, 0,
57	michael	344	{ m_unregistered, m_not_oper, mo_chgname, mo_chgname, mo_chgname, m_ignore }
58	adx	30	};
59
60			#ifndef STATIC_MODULES
61			void
62			_modinit(void)
63			{
64			mod_add_cmd(&chgident_msgtab);
65			mod_add_cmd(&chghost_msgtab);
66			mod_add_cmd(&chgname_msgtab);
67			}
68
69			void
70			_moddeinit(void)
71			{
72			mod_del_cmd(&chgname_msgtab);
73			mod_del_cmd(&chghost_msgtab);
74			mod_del_cmd(&chgident_msgtab);
75			}
76
77	knight	31	const char *_version = "$Revision$";
78	adx	30	#endif
79
80			static void
81			mo_chgident(struct Client client_p, struct Client source_p,
82			int parc, char *parv[])
83			{
84			struct Client *target_p = NULL;
85
86	adx	79	if (MyClient(source_p) && !IsOperAdmin(source_p))
87	adx	30	{
88			sendto_one(source_p, form_str(ERR_NOPRIVS),
89			me.name, parv[0], "CHGIDENT");
90			return;
91			}
92
93			if (EmptyString(parv[2]))
94			{
95			parv[2] = parv[1];
96
97			target_p = source_p;
98			if (!IsClient(target_p))
99			return;
100			}
101			else {
102			target_p = find_client(parv[1]);
103
104			if (target_p == NULL \|\| !IsClient(target_p))
105			{
106	michael	344	sendto_one(source_p, form_str(ERR_NOSUCHNICK),
107			me.name, parv[0], parv[1]);
108	adx	30	return;
109			}
110			}
111
112			if (strlen(parv[2]) > USERLEN \|\| !*parv[2] \|\| !valid_username(parv[2]))
113			{
114			sendto_one(source_p, ":%s NOTICE %s :Invalid username", me.name, parv[0]);
115			return;
116			}
117
118			strcpy(target_p->username, parv[2]);
119
120			if (MyClient(source_p))
121			{
122			sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
123			":%s ENCAP * CHGIDENT %s %s",
124			parv[0], target_p->name, parv[2]);
125			sendto_one(source_p, ":%s NOTICE %s :%s changed to %s@%s",
126			me.name, parv[0], target_p->name, target_p->username,
127			target_p->host);
128			}
129
130			if (MyConnect(target_p) && IsClient(source_p))
131			sendto_one(target_p, ":%s NOTICE %s :You are now %s@%s",
132			me.name, target_p->name, target_p->username, target_p->host);
133			}
134
135			static void
136			mo_chghost(struct Client client_p, struct Client source_p,
137			int parc, char *parv[])
138			{
139			struct Client *target_p = NULL;
140
141	adx	79	if (MyClient(source_p) && !IsOperAdmin(source_p))
142	adx	30	{
143			sendto_one(source_p, form_str(ERR_NOPRIVS),
144			me.name, parv[0], "CHGHOST");
145			return;
146			}
147
148			if (EmptyString(parv[2]))
149			{
150			parv[2] = parv[1];
151
152			target_p = source_p;
153			if (!IsClient(target_p))
154			return;
155			}
156			else {
157			target_p = find_client(parv[1]);
158			if (target_p == NULL \|\| !IsClient(target_p))
159			{
160	michael	344	sendto_one(source_p, form_str(ERR_NOSUCHNICK),
161			me.name, parv[0], parv[1]);
162	adx	30	return;
163			}
164			}
165
166			if (strlen(parv[2]) > HOSTLEN \|\| !*parv[2] \|\| !valid_hostname(parv[2]))
167			{
168			sendto_one(source_p, ":%s NOTICE %s :Invalid hostname", me.name, parv[0]);
169			return;
170			}
171
172			strcpy(target_p->host, parv[2]);
173	michael	344	SetIPSpoof(target_p);
174	adx	30
175			if (MyClient(source_p))
176			{
177			sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
178	metalrock	160	":%s ENCAP * CHGHOST %s :%s",
179	adx	30	parv[0], target_p->name, parv[2]);
180			sendto_one(source_p, ":%s NOTICE %s :%s changed to %s@%s",
181			me.name, parv[0], target_p->name, target_p->username,
182			target_p->host);
183			}
184
185			if (MyConnect(target_p) && IsClient(source_p))
186			sendto_one(target_p, ":%s NOTICE %s :You are now %s@%s",
187			me.name, target_p->name, target_p->username, target_p->host);
188			}
189
190			static void
191			mo_chgname(struct Client client_p, struct Client source_p,
192			int parc, char *parv[])
193			{
194			struct Client *target_p = NULL;
195
196	adx	79	if (MyClient(source_p) && !IsOperAdmin(source_p))
197	adx	30	{
198			sendto_one(source_p, form_str(ERR_NOPRIVS),
199			me.name, parv[0], "CHGNAME");
200			return;
201			}
202
203			if (EmptyString(parv[2]))
204			{
205			parv[2] = parv[1];
206			target_p = source_p;
207			}
208			else if ((target_p = find_client(parv[1])) == NULL)
209			{
210	michael	344	sendto_one(source_p, form_str(ERR_NOSUCHNICK),
211			me.name, parv[0], parv[1]);
212	adx	30	return;
213			}
214
215			if (strlen(parv[2]) > REALLEN \|\| !*parv[2])
216			{
217			sendto_one(source_p, ":%s NOTICE %s :Invalid realname", me.name, parv[0]);
218			return;
219			}
220
221			if (parc > 3 && MyClient(source_p))
222			sendto_one(source_p, ":%s NOTICE %s :Warning -- too many parameters "
223			"for CHGNAME. You are probably missing a : before the new "
224			"IRC name.", me.name, parv[0]);
225
226			strcpy(target_p->info, parv[2]);
227
228			if (MyClient(source_p))
229			{
230			sendto_server(client_p, source_p, NULL, NOCAPS, NOCAPS, LL_ICLIENT,
231			":%s ENCAP * CHGNAME %s :%s",
232			parv[0], target_p->name, parv[2]);
233			sendto_one(source_p, ":%s NOTICE %s :%s realname changed to [%s]",
234			me.name, parv[0], target_p->name, target_p->info);
235			}
236
237			if (MyClient(target_p) && IsClient(source_p))
238			sendto_one(target_p, ":%s NOTICE %s :Your realname is now [%s]",
239			me.name, target_p->name, target_p->info);
240			}