modules/core/m_mode.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2019 ircd-hybrid development team
 *
 *  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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file m_mode.c
 * \brief Includes required functions for processing the MODE command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "client_svstag.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "user.h"
#include "conf.h"
#include "server.h"
#include "send.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"


/* set_user_mode()
 *
 * added 15/10/91 By Darren Reed.
 * parv[0] - command
 * parv[1] - username to change mode for
 * parv[2] - modes to change
 */
static void
set_user_mode(struct Client *source_p, const int parc, char *parv[])
{
  const struct user_modes *tab = NULL;
  const unsigned int setmodes = source_p->umodes;
  const struct Client *target_p = NULL;
  bool badmode = false;
  int what = MODE_ADD;

  if ((target_p = find_person(source_p, parv[1])) == NULL)
  {
    if (MyConnect(source_p))
      sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
    return;
  }

  if (source_p != target_p)
  {
     sendto_one_numeric(source_p, &me, ERR_USERSDONTMATCH);
     return;
  }

  if (parc < 3)
  {
    char buf[UMODE_MAX_STR] = "";
    char *m = buf;

    *m++ = '+';
    for (tab = umode_tab; tab->c; ++tab)
      if (HasUMode(source_p, tab->flag))
        *m++ = tab->c;
    *m = '\0';

    sendto_one_numeric(source_p, &me, RPL_UMODEIS, buf);
    return;
  }

  /* Parse user mode change string */
  for (const char *m = parv[2]; *m; ++m)
  {
    switch (*m)
    {
      case '+':
        what = MODE_ADD;
        break;
      case '-':
        what = MODE_DEL;
        break;
      case 'o':
        if (what == MODE_ADD)
        {
          if (!MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER))
          {
            ++Count.oper;
            SetOper(source_p);
          }
        }
        else
        {
          if (!HasUMode(source_p, UMODE_OPER))
            break;

          ClearOper(source_p);
          --Count.oper;

          if (MyConnect(source_p))
          {
            dlink_node *node;

            svstag_detach(&source_p->svstags, RPL_WHOISOPERATOR);
            conf_detach(source_p, CONF_OPER);

            ClrOFlag(source_p);
            DelUMode(source_p, ConfigGeneral.oper_only_umodes);

            if ((node = dlinkFindDelete(&oper_list, source_p)))
              free_dlink_node(node);
          }
        }

        break;

      case 'S':  /* Only servers may set +S in a burst */
      case 'W':  /* Only servers may set +W in a burst */
      case 'r':  /* Only services may set +r */
        break;

      default:
        if ((tab = umode_map[(unsigned char)*m]))
        {
          if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER) &&
              (ConfigGeneral.oper_only_umodes & tab->flag))
            badmode = true;
          else
          {
            if (what == MODE_ADD)
              AddUMode(source_p, tab->flag);
            else
              DelUMode(source_p, tab->flag);
          }
        }
        else if (MyConnect(source_p))
          badmode = true;

        break;
    }
  }

  if (badmode == true)
    sendto_one_numeric(source_p, &me, ERR_UMODEUNKNOWNFLAG);

  if (MyConnect(source_p) && HasUMode(source_p, UMODE_ADMIN) &&
      !HasOFlag(source_p, OPER_FLAG_ADMIN))
  {
    sendto_one_notice(source_p, &me, ":*** You have no admin flag;");
    DelUMode(source_p, UMODE_ADMIN);
  }

  if (!(setmodes & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE))
    ++Count.invisi;
  else if ((setmodes & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE))
    --Count.invisi;

  /*
   * Compare new modes with old modes and send string which will cause
   * servers to update correctly.
   */
  send_umode_out(source_p, setmodes);
}

/*! \brief MODE command handler
 *
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = command
 *      - parv[1] = channel or nick name
 *      - parv[2] = modes to be added or removed
 */
static int
m_mode(struct Client *source_p, int parc, char *parv[])
{
  struct Membership *member = NULL;

  if (EmptyString(parv[1]))
  {
    sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "MODE");
    return 0;
  }

  /* Now, try to find the channel in question */
  if (!IsChanPrefix(*parv[1]))
  {
    /* If here, it has to be a non-channel name */
    set_user_mode(source_p, parc, parv);
    return 0;
  }

  struct Channel *chptr;
  if ((chptr = hash_find_channel(parv[1])) == NULL)
  {
    sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
    return 0;
  }

  /* Now known the channel exists */
  if (parc < 3)
  {
    char modebuf[MODEBUFLEN] = "";
    char parabuf[MODEBUFLEN] = "";

    channel_modes(chptr, source_p, modebuf, parabuf);
    sendto_one_numeric(source_p, &me, RPL_CHANNELMODEIS, chptr->name, modebuf, parabuf);
    sendto_one_numeric(source_p, &me, RPL_CREATIONTIME, chptr->name, chptr->creationtime);
    return 0;
  }

  if (MyClient(source_p))
    member = find_channel_link(source_p, chptr);

  channel_mode_set(source_p, chptr, member, parc - 2, parv + 2);
  return 0;
}

static struct Message mode_msgtab =
{
  .cmd = "MODE",
  .args_min = 2,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_mode,
  .handlers[SERVER_HANDLER] = m_mode,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = m_mode
};

static void
module_init(void)
{
  mod_add_cmd(&mode_msgtab);
}

static void
module_exit(void)
{
  mod_del_cmd(&mode_msgtab);
}

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
  .is_core = true
};
Revision:	8752
Committed:	Tue Jan 1 11:07:01 2019 UTC (5 years, 3 months ago) by michael
Content type:	text/x-csrc
File size:	6913 byte(s)
Log Message:	- Update copyright years
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2019 ircd-hybrid development team
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file m_mode.c
23	* \brief Includes required functions for processing the MODE command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "channel.h"
30	#include "channel_mode.h"
31	#include "client.h"
32	#include "client_svstag.h"
33	#include "hash.h"
34	#include "irc_string.h"
35	#include "ircd.h"
36	#include "numeric.h"
37	#include "user.h"
38	#include "conf.h"
39	#include "server.h"
40	#include "send.h"
41	#include "parse.h"
42	#include "modules.h"
43	#include "packet.h"
44
45
46	/* set_user_mode()
47	*
48	* added 15/10/91 By Darren Reed.
49	* parv[0] - command
50	* parv[1] - username to change mode for
51	* parv[2] - modes to change
52	*/
53	static void
54	set_user_mode(struct Client source_p, const int parc, char parv[])
55	{
56	const struct user_modes *tab = NULL;
57	const unsigned int setmodes = source_p->umodes;
58	const struct Client *target_p = NULL;
59	bool badmode = false;
60	int what = MODE_ADD;
61
62	if ((target_p = find_person(source_p, parv[1])) == NULL)
63	{
64	if (MyConnect(source_p))
65	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
66	return;
67	}
68
69	if (source_p != target_p)
70	{
71	sendto_one_numeric(source_p, &me, ERR_USERSDONTMATCH);
72	return;
73	}
74
75	if (parc < 3)
76	{
77	char buf[UMODE_MAX_STR] = "";
78	char *m = buf;
79
80	*m++ = '+';
81	for (tab = umode_tab; tab->c; ++tab)
82	if (HasUMode(source_p, tab->flag))
83	*m++ = tab->c;
84	*m = '\0';
85
86	sendto_one_numeric(source_p, &me, RPL_UMODEIS, buf);
87	return;
88	}
89
90	/* Parse user mode change string */
91	for (const char m = parv[2]; m; ++m)
92	{
93	switch (*m)
94	{
95	case '+':
96	what = MODE_ADD;
97	break;
98	case '-':
99	what = MODE_DEL;
100	break;
101	case 'o':
102	if (what == MODE_ADD)
103	{
104	if (!MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER))
105	{
106	++Count.oper;
107	SetOper(source_p);
108	}
109	}
110	else
111	{
112	if (!HasUMode(source_p, UMODE_OPER))
113	break;
114
115	ClearOper(source_p);
116	--Count.oper;
117
118	if (MyConnect(source_p))
119	{
120	dlink_node *node;
121
122	svstag_detach(&source_p->svstags, RPL_WHOISOPERATOR);
123	conf_detach(source_p, CONF_OPER);
124
125	ClrOFlag(source_p);
126	DelUMode(source_p, ConfigGeneral.oper_only_umodes);
127
128	if ((node = dlinkFindDelete(&oper_list, source_p)))
129	free_dlink_node(node);
130	}
131	}
132
133	break;
134
135	case 'S': /* Only servers may set +S in a burst */
136	case 'W': /* Only servers may set +W in a burst */
137	case 'r': /* Only services may set +r */
138	break;
139
140	default:
141	if ((tab = umode_map[(unsigned char)*m]))
142	{
143	if (MyConnect(source_p) && !HasUMode(source_p, UMODE_OPER) &&
144	(ConfigGeneral.oper_only_umodes & tab->flag))
145	badmode = true;
146	else
147	{
148	if (what == MODE_ADD)
149	AddUMode(source_p, tab->flag);
150	else
151	DelUMode(source_p, tab->flag);
152	}
153	}
154	else if (MyConnect(source_p))
155	badmode = true;
156
157	break;
158	}
159	}
160
161	if (badmode == true)
162	sendto_one_numeric(source_p, &me, ERR_UMODEUNKNOWNFLAG);
163
164	if (MyConnect(source_p) && HasUMode(source_p, UMODE_ADMIN) &&
165	!HasOFlag(source_p, OPER_FLAG_ADMIN))
166	{
167	sendto_one_notice(source_p, &me, ":*** You have no admin flag;");
168	DelUMode(source_p, UMODE_ADMIN);
169	}
170
171	if (!(setmodes & UMODE_INVISIBLE) && HasUMode(source_p, UMODE_INVISIBLE))
172	++Count.invisi;
173	else if ((setmodes & UMODE_INVISIBLE) && !HasUMode(source_p, UMODE_INVISIBLE))
174	--Count.invisi;
175
176	/*
177	* Compare new modes with old modes and send string which will cause
178	* servers to update correctly.
179	*/
180	send_umode_out(source_p, setmodes);
181	}
182
183	/*! \brief MODE command handler
184	*
185	* \param source_p Pointer to allocated Client struct from which the message
186	* originally comes from. This can be a local or remote client.
187	* \param parc Integer holding the number of supplied arguments.
188	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
189	* pointers.
190	* \note Valid arguments for this command are:
191	* - parv[0] = command
192	* - parv[1] = channel or nick name
193	* - parv[2] = modes to be added or removed
194	*/
195	static int
196	m_mode(struct Client source_p, int parc, char parv[])
197	{
198	struct Membership *member = NULL;
199
200	if (EmptyString(parv[1]))
201	{
202	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "MODE");
203	return 0;
204	}
205
206	/* Now, try to find the channel in question */
207	if (!IsChanPrefix(*parv[1]))
208	{
209	/* If here, it has to be a non-channel name */
210	set_user_mode(source_p, parc, parv);
211	return 0;
212	}
213
214	struct Channel *chptr;
215	if ((chptr = hash_find_channel(parv[1])) == NULL)
216	{
217	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
218	return 0;
219	}
220
221	/* Now known the channel exists */
222	if (parc < 3)
223	{
224	char modebuf[MODEBUFLEN] = "";
225	char parabuf[MODEBUFLEN] = "";
226
227	channel_modes(chptr, source_p, modebuf, parabuf);
228	sendto_one_numeric(source_p, &me, RPL_CHANNELMODEIS, chptr->name, modebuf, parabuf);
229	sendto_one_numeric(source_p, &me, RPL_CREATIONTIME, chptr->name, chptr->creationtime);
230	return 0;
231	}
232
233	if (MyClient(source_p))
234	member = find_channel_link(source_p, chptr);
235
236	channel_mode_set(source_p, chptr, member, parc - 2, parv + 2);
237	return 0;
238	}
239
240	static struct Message mode_msgtab =
241	{
242	.cmd = "MODE",
243	.args_min = 2,
244	.args_max = MAXPARA,
245	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
246	.handlers[CLIENT_HANDLER] = m_mode,
247	.handlers[SERVER_HANDLER] = m_mode,
248	.handlers[ENCAP_HANDLER] = m_ignore,
249	.handlers[OPER_HANDLER] = m_mode
250	};
251
252	static void
253	module_init(void)
254	{
255	mod_add_cmd(&mode_msgtab);
256	}
257
258	static void
259	module_exit(void)
260	{
261	mod_del_cmd(&mode_msgtab);
262	}
263
264	struct module module_entry =
265	{
266	.version = "$Revision$",
267	.modinit = module_init,
268	.modexit = module_exit,
269	.is_core = true
270	};