modules/core/m_mode.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2014 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 */

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

#include "stdinc.h"
#include "list.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "numeric.h"
#include "s_user.h"
#include "conf.h"
#include "s_serv.h"
#include "send.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"


/*
 * m_mode - MODE command handler
 * parv[0] - command
 * parv[1] - channel
 */
static int
m_mode(struct Client *client_p, struct Client *source_p,
       int parc, char *parv[])
{
  struct Channel *chptr = NULL;
  struct Membership *member = NULL;
  char modebuf[MODEBUFLEN];
  char parabuf[MODEBUFLEN];

  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(client_p, source_p, parc, parv);
    return 0;
  }

  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)
  {
    channel_modes(chptr, source_p, modebuf, parabuf);
    sendto_one_numeric(source_p, &me, RPL_CHANNELMODEIS, chptr->chname, modebuf, parabuf);
    sendto_one_numeric(source_p, &me, RPL_CREATIONTIME, chptr->chname, chptr->channelts);
    return 0;
  }

  /*
   * bounce all modes from people we deop on sjoin
   * servers have always gotten away with murder,
   * including telnet servers *g* - Dianora
   */
  if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
    set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2);
  else
  {
    member = find_channel_link(source_p, chptr);

    if (!has_member_flags(member, CHFL_DEOPPED))
    {
      /* Finish the flood grace period... */
      if (MyClient(source_p) && !IsFloodDone(source_p))
        if (!((parc == 3) && (parv[2][0] == 'b') && (parv[2][1] == '\0')))
          flood_endgrace(source_p);

      set_channel_mode(client_p, source_p, chptr, member, parc - 2, parv + 2);
    }
  }

  return 0;
}

/*
 * ms_tmode()
 *
 * inputs       - parv[0] = command
 *                parv[1] = TS
 *                parv[2] = channel name
 *                parv[3] = modestring
 */
static int
ms_tmode(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
  struct Channel *chptr = NULL;
  struct Membership *member = NULL;

  if ((chptr = hash_find_channel(parv[2])) == NULL)
  {
    sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[2]);
    return 0;
  }

  if (atol(parv[1]) > chptr->channelts)
    return 0;

  if (IsServer(source_p) || HasFlag(source_p, FLAGS_SERVICE))
    set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3);
  else
  {
    member = find_channel_link(source_p, chptr);

    /* XXX are we sure we just want to bail here? */
    if (has_member_flags(member, CHFL_DEOPPED))
      return 0;

    set_channel_mode(client_p, source_p, chptr, member, parc - 3, parv + 3);
  }

  return 0;
}

/*
 * ms_bmask()
 *
 * inputs       - parv[0] = command
 *                parv[1] = TS
 *                parv[2] = channel name
 *                parv[3] = type of ban to add ('b' 'I' or 'e')
 *                parv[4] = space delimited list of masks to add
 * outputs      - none
 * side effects - propagates unchanged bmask line to CAP_TS6 servers,
 *                sends plain modes to the others.  nothing is sent
 *                to the server the issuing server is connected through
 */
static int
ms_bmask(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
  char modebuf[IRCD_BUFSIZE];
  char parabuf[IRCD_BUFSIZE];
  char banbuf[IRCD_BUFSIZE];
  struct Channel *chptr;
  char *s, *t, *mbuf, *pbuf;
  unsigned int mode_type = 0;
  int mlen, tlen;
  int modecount = 0;

  if ((chptr = hash_find_channel(parv[2])) == NULL)
    return 0;

  /* TS is higher, drop it. */
  if (atol(parv[1]) > chptr->channelts)
    return 0;

  switch (*parv[3])
  {
    case 'b':
      mode_type = CHFL_BAN;
      break;

    case 'e':
      mode_type = CHFL_EXCEPTION;
      break;

    case 'I':
      mode_type = CHFL_INVEX;
      break;

    /* maybe we should just blindly propagate this? */
    default:
      return 0;
  }

  parabuf[0] = '\0';
  s = banbuf;
  strlcpy(s, parv[4], sizeof(banbuf));

  /* only need to construct one buffer, for non-ts6 servers */
  mlen = snprintf(modebuf, sizeof(modebuf), ":%s MODE %s +",
                  (IsHidden(source_p) || ConfigServerHide.hide_servers) ? me.name : source_p->name,
                  chptr->chname);
  mbuf = modebuf + mlen;
  pbuf = parabuf;

  do
  {
    if ((t = strchr(s, ' ')))
      *t++ = '\0';
    tlen = strlen(s);

    /* I don't even want to begin parsing this.. */
    if (tlen > MODEBUFLEN)
      break;

    if (tlen && *s != ':' && add_id(source_p, chptr, s, mode_type))
    {
      /* this new one wont fit.. */
      if (mbuf - modebuf + 2 + pbuf - parabuf + tlen > IRCD_BUFSIZE - 2 ||
          modecount >= MAXMODEPARAMS)
      {
        *mbuf = '\0';
        *(pbuf - 1) = '\0';

        sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s",
                             modebuf, parabuf);
        mbuf = modebuf + mlen;
        pbuf = parabuf;
        modecount = 0;
      }

      *mbuf++ = parv[3][0];
      pbuf += sprintf(pbuf, "%s ", s);
      modecount++;
    }

    s = t;
  } while (s != NULL);

  if (modecount)
  {
    *mbuf = *(pbuf - 1) = '\0';
    sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s", modebuf, parabuf);
  }

  /* assumption here is that since the server sent BMASK, they are TS6, so they have an ID */
  sendto_server(client_p, NOCAPS, NOCAPS, ":%s BMASK %lu %s %s :%s",
                source_p->id, (unsigned long)chptr->channelts, chptr->chname,
                parv[3], parv[4]);
  return 0;
}

static struct Message mode_msgtab =
{
  "MODE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_mode, m_mode, m_ignore, m_mode, m_ignore }
};

static struct Message tmode_msgtab =
{
  "TMODE", 0, 0, 4, MAXPARA, MFLG_SLOW, 0,
  { m_ignore, m_ignore, ms_tmode, m_ignore, m_ignore, m_ignore }
};

static struct Message bmask_msgtab =
{
  "BMASK", 0, 0, 5, MAXPARA, MFLG_SLOW, 0,
  { m_ignore, m_ignore, ms_bmask, m_ignore, m_ignore, m_ignore }
};

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

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

struct module module_entry =
{
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = MODULE_FLAG_CORE
};
Revision:	3135
Committed:	Mon Mar 10 21:11:25 2014 UTC (12 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	7696 byte(s)
Log Message:	- Server now no longer accepts TS5 links
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	2820	* Copyright (c) 1997-2014 ircd-hybrid development team
5	adx	30	*
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19			* USA
20			*/
21
22	michael	2820	/*! \file m_mode.c
23			* \brief Includes required functions for processing the MODE/TMODE/BMASK command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1011	#include "list.h"
29	adx	30	#include "channel.h"
30			#include "channel_mode.h"
31			#include "client.h"
32			#include "hash.h"
33			#include "irc_string.h"
34			#include "ircd.h"
35			#include "numeric.h"
36			#include "s_user.h"
37	michael	1309	#include "conf.h"
38	adx	30	#include "s_serv.h"
39			#include "send.h"
40			#include "parse.h"
41			#include "modules.h"
42			#include "packet.h"
43
44
45			/*
46			* m_mode - MODE command handler
47	michael	3096	* parv[0] - command
48	adx	30	* parv[1] - channel
49			*/
50	michael	2820	static int
51	adx	30	m_mode(struct Client client_p, struct Client source_p,
52			int parc, char *parv[])
53			{
54			struct Channel *chptr = NULL;
55	michael	1895	struct Membership *member = NULL;
56			char modebuf[MODEBUFLEN];
57			char parabuf[MODEBUFLEN];
58	adx	30
59	michael	885	if (EmptyString(parv[1]))
60	adx	30	{
61	michael	3109	sendto_one_numeric(source_p, &me, ERR_NEEDMOREPARAMS, "MODE");
62	michael	2820	return 0;
63	adx	30	}
64
65			/* Now, try to find the channel in question */
66			if (!IsChanPrefix(*parv[1]))
67			{
68			/* if here, it has to be a non-channel name */
69			set_user_mode(client_p, source_p, parc, parv);
70	michael	2820	return 0;
71	adx	30	}
72
73	michael	885	if ((chptr = hash_find_channel(parv[1])) == NULL)
74	adx	30	{
75	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[1]);
76	michael	2820	return 0;
77	db	848	}
78	adx	30
79			/* Now known the channel exists */
80			if (parc < 3)
81			{
82			channel_modes(chptr, source_p, modebuf, parabuf);
83	michael	3109	sendto_one_numeric(source_p, &me, RPL_CHANNELMODEIS, chptr->chname, modebuf, parabuf);
84			sendto_one_numeric(source_p, &me, RPL_CREATIONTIME, chptr->chname, chptr->channelts);
85	michael	2820	return 0;
86	adx	30	}
87	michael	1895
88			/*
89			* bounce all modes from people we deop on sjoin
90	adx	30	* servers have always gotten away with murder,
91			* including telnet servers g - Dianora
92			*/
93	michael	2644	if (IsServer(source_p) \|\| HasFlag(source_p, FLAGS_SERVICE))
94	michael	2937	set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2);
95	adx	30	else
96			{
97			member = find_channel_link(source_p, chptr);
98
99			if (!has_member_flags(member, CHFL_DEOPPED))
100			{
101			/* Finish the flood grace period... */
102			if (MyClient(source_p) && !IsFloodDone(source_p))
103			if (!((parc == 3) && (parv[2][0] == 'b') && (parv[2][1] == '\0')))
104			flood_endgrace(source_p);
105
106	michael	2937	set_channel_mode(client_p, source_p, chptr, member, parc - 2, parv + 2);
107	adx	30	}
108			}
109	michael	2820
110			return 0;
111	adx	30	}
112
113			/*
114			* ms_tmode()
115			*
116	michael	3096	* inputs - parv[0] = command
117	adx	30	* parv[1] = TS
118			* parv[2] = channel name
119			* parv[3] = modestring
120			*/
121	michael	2820	static int
122	adx	30	ms_tmode(struct Client client_p, struct Client source_p, int parc, char *parv[])
123			{
124			struct Channel *chptr = NULL;
125			struct Membership *member = NULL;
126
127			if ((chptr = hash_find_channel(parv[2])) == NULL)
128			{
129	michael	3109	sendto_one_numeric(source_p, &me, ERR_NOSUCHCHANNEL, parv[2]);
130	michael	2820	return 0;
131	adx	30	}
132
133			if (atol(parv[1]) > chptr->channelts)
134	michael	2820	return 0;
135	adx	30
136	michael	2644	if (IsServer(source_p) \|\| HasFlag(source_p, FLAGS_SERVICE))
137	michael	2937	set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3);
138	adx	30	else
139			{
140			member = find_channel_link(source_p, chptr);
141
142			/* XXX are we sure we just want to bail here? */
143			if (has_member_flags(member, CHFL_DEOPPED))
144	michael	2820	return 0;
145	adx	30
146	michael	2937	set_channel_mode(client_p, source_p, chptr, member, parc - 3, parv + 3);
147	adx	30	}
148	michael	2820
149			return 0;
150	adx	30	}
151
152			/*
153			* ms_bmask()
154			*
155	michael	3096	* inputs - parv[0] = command
156	adx	30	* parv[1] = TS
157			* parv[2] = channel name
158			* parv[3] = type of ban to add ('b' 'I' or 'e')
159			* parv[4] = space delimited list of masks to add
160			* outputs - none
161			* side effects - propagates unchanged bmask line to CAP_TS6 servers,
162			* sends plain modes to the others. nothing is sent
163			* to the server the issuing server is connected through
164			*/
165	michael	2820	static int
166	adx	30	ms_bmask(struct Client client_p, struct Client source_p, int parc, char *parv[])
167			{
168	michael	2820	char modebuf[IRCD_BUFSIZE];
169			char parabuf[IRCD_BUFSIZE];
170			char banbuf[IRCD_BUFSIZE];
171	adx	30	struct Channel *chptr;
172			char s, t, mbuf, pbuf;
173	michael	3044	unsigned int mode_type = 0;
174	adx	30	int mlen, tlen;
175			int modecount = 0;
176
177			if ((chptr = hash_find_channel(parv[2])) == NULL)
178	michael	2820	return 0;
179	adx	30
180			/* TS is higher, drop it. */
181			if (atol(parv[1]) > chptr->channelts)
182	michael	2820	return 0;
183	adx	30
184			switch (*parv[3])
185			{
186			case 'b':
187			mode_type = CHFL_BAN;
188			break;
189
190			case 'e':
191			mode_type = CHFL_EXCEPTION;
192			break;
193
194			case 'I':
195			mode_type = CHFL_INVEX;
196			break;
197
198			/* maybe we should just blindly propagate this? */
199			default:
200	michael	2820	return 0;
201	adx	30	}
202
203			parabuf[0] = '\0';
204			s = banbuf;
205			strlcpy(s, parv[4], sizeof(banbuf));
206
207			/* only need to construct one buffer, for non-ts6 servers */
208	michael	1793	mlen = snprintf(modebuf, sizeof(modebuf), ":%s MODE %s +",
209	michael	2560	(IsHidden(source_p) \|\| ConfigServerHide.hide_servers) ? me.name : source_p->name,
210			chptr->chname);
211	adx	30	mbuf = modebuf + mlen;
212			pbuf = parabuf;
213
214	michael	2820	do
215			{
216			if ((t = strchr(s, ' ')))
217	adx	30	*t++ = '\0';
218			tlen = strlen(s);
219
220	michael	2820	/* I don't even want to begin parsing this.. */
221	adx	30	if (tlen > MODEBUFLEN)
222			break;
223
224			if (tlen && *s != ':' && add_id(source_p, chptr, s, mode_type))
225			{
226			/* this new one wont fit.. */
227			if (mbuf - modebuf + 2 + pbuf - parabuf + tlen > IRCD_BUFSIZE - 2 \|\|
228			modecount >= MAXMODEPARAMS)
229			{
230			*mbuf = '\0';
231			*(pbuf - 1) = '\0';
232
233	michael	1011	sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s",
234	adx	30	modebuf, parabuf);
235			mbuf = modebuf + mlen;
236			pbuf = parabuf;
237			modecount = 0;
238			}
239
240			*mbuf++ = parv[3][0];
241	michael	1793	pbuf += sprintf(pbuf, "%s ", s);
242	adx	30	modecount++;
243			}
244
245			s = t;
246			} while (s != NULL);
247
248			if (modecount)
249			{
250			mbuf = (pbuf - 1) = '\0';
251	michael	1011	sendto_channel_local(ALL_MEMBERS, 0, chptr, "%s %s", modebuf, parabuf);
252	adx	30	}
253
254			/* assumption here is that since the server sent BMASK, they are TS6, so they have an ID */
255	michael	3135	sendto_server(client_p, NOCAPS, NOCAPS, ":%s BMASK %lu %s %s :%s",
256	adx	30	source_p->id, (unsigned long)chptr->channelts, chptr->chname,
257			parv[3], parv[4]);
258	michael	2820	return 0;
259	adx	30	}
260	michael	1230
261	michael	2820	static struct Message mode_msgtab =
262			{
263	michael	1230	"MODE", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
264	michael	2820	{ m_unregistered, m_mode, m_mode, m_ignore, m_mode, m_ignore }
265	michael	1230	};
266
267	michael	2820	static struct Message tmode_msgtab =
268			{
269	michael	1230	"TMODE", 0, 0, 4, MAXPARA, MFLG_SLOW, 0,
270	michael	2820	{ m_ignore, m_ignore, ms_tmode, m_ignore, m_ignore, m_ignore }
271	michael	1230	};
272
273	michael	2820	static struct Message bmask_msgtab =
274			{
275	michael	1230	"BMASK", 0, 0, 5, MAXPARA, MFLG_SLOW, 0,
276	michael	2820	{ m_ignore, m_ignore, ms_bmask, m_ignore, m_ignore, m_ignore }
277	michael	1230	};
278
279			static void
280			module_init(void)
281			{
282			mod_add_cmd(&mode_msgtab);
283			mod_add_cmd(&tmode_msgtab);
284			mod_add_cmd(&bmask_msgtab);
285			}
286
287			static void
288			module_exit(void)
289			{
290			mod_del_cmd(&mode_msgtab);
291			mod_del_cmd(&tmode_msgtab);
292			mod_del_cmd(&bmask_msgtab);
293			}
294
295	michael	2820	struct module module_entry =
296			{
297	michael	1230	.node = { NULL, NULL, NULL },
298			.name = NULL,
299			.version = "$Revision$",
300			.handle = NULL,
301			.modinit = module_init,
302			.modexit = module_exit,
303			.flags = MODULE_FLAG_CORE
304			};