modules/core/m_mode.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_mode.c: Sets a user or channel mode.
 *
 *  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
 *
 *  $Id$
 */

#include "stdinc.h"
#include "tools.h"
#include "handlers.h"
#include "channel.h"
#include "channel_mode.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "ircd.h"
#include "numeric.h"
#include "s_user.h"
#include "s_conf.h"
#include "s_serv.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "packet.h"
#include "common.h"

static void m_mode(struct Client *, struct Client *, int, char *[]);
static void ms_tmode(struct Client *, struct Client *, int, char *[]);
static void ms_bmask(struct Client *, struct Client *, int, char *[]);

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

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

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

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&mode_msgtab);
  mod_add_cmd(&tmode_msgtab);
  mod_add_cmd(&bmask_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&mode_msgtab);
  mod_del_cmd(&tmode_msgtab);
  mod_del_cmd(&bmask_msgtab);
}

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

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

  if (EmptyString(parv[1]))
  {
    sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
               me.name, source_p->name, "MODE");
    return;
  }

  /* 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;
  }

  if ((chptr = hash_find_channel(parv[1])) == NULL)
  {
    sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
               ID_or_name(&me, source_p->from),
               ID_or_name(source_p, source_p->from),
               parv[1]);
    return;
  }

  /* Now known the channel exists */
  if (parc < 3)
  {
    channel_modes(chptr, source_p, modebuf, parabuf);
    sendto_one(source_p, form_str(RPL_CHANNELMODEIS),
               me.name, source_p->name, chptr->chname, modebuf, parabuf);
    sendto_one(source_p, form_str(RPL_CREATIONTIME),
               me.name, source_p->name, chptr->chname, chptr->channelts);
  }
  /* bounce all modes from people we deop on sjoin
   * servers have always gotten away with murder,
   * including telnet servers *g* - Dianora
   *
   * XXX Is it worth the bother to make an ms_mode() ? - Dianora
   */
  else if (IsServer(source_p))
  {
    set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2,
                     chptr->chname);
  }
  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,
                       chptr->chname);
    }
  }
}

/*
 * ms_tmode()
 *
 * inputs       - parv[0] = UID
 *                parv[1] = TS
 *                parv[2] = channel name
 *                parv[3] = modestring
 */
static void
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(source_p, form_str(ERR_NOSUCHCHANNEL),
               ID_or_name(&me, client_p), ID_or_name(source_p, client_p), parv[2]);
    return;
  }

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

  if (IsServer(source_p))
    set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3, chptr->chname);
  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;

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

/*
 * ms_bmask()
 *
 * inputs       - parv[0] = SID
 *                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 void
ms_bmask(struct Client *client_p, struct Client *source_p, int parc, char *parv[])
{
  static char modebuf[IRCD_BUFSIZE];
  static char parabuf[IRCD_BUFSIZE];
  static char banbuf[IRCD_BUFSIZE];
  struct Channel *chptr;
  char *s, *t, *mbuf, *pbuf;
  long mode_type;
  int mlen, tlen;
  int modecount = 0;
  int needcap = NOCAPS;

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

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

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

    case 'e':
      mode_type = CHFL_EXCEPTION;
      needcap = CAP_EX;
      break;

    case 'I':
      mode_type = CHFL_INVEX;
      needcap = CAP_IE;
      break;

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

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

  /* only need to construct one buffer, for non-ts6 servers */
  mlen = ircsprintf(modebuf, ":%s MODE %s +",
                    source_p->name, chptr->chname);
  mbuf = modebuf + mlen;
  pbuf = parabuf;

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

    /* I dont 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, NO, chptr, "%s %s",
                             modebuf, parabuf);
        sendto_server(client_p, chptr, needcap, CAP_TS6,
                      "%s %s", modebuf, parabuf);

        mbuf = modebuf + mlen;
        pbuf = parabuf;
        modecount = 0;
      }

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

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

  if (modecount)
  {
    *mbuf = *(pbuf - 1) = '\0';
    sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s", modebuf, parabuf);
    sendto_server(client_p, chptr, needcap, CAP_TS6,
                  "%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, chptr, CAP_TS6|needcap, NOCAPS,
                ":%s BMASK %lu %s %s :%s",
                source_p->id, (unsigned long)chptr->channelts, chptr->chname,
                parv[3], parv[4]);
}
Revision:	885
Committed:	Wed Oct 31 18:09:24 2007 UTC (17 years, 10 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-7.2/modules/core/m_mode.c*
File size:	8280 byte(s)
Log Message:	- Removed LazyLinks in 7.2 to stop people from asking why we keep broken code for half a decade. LL will be implemented in a smarter fashion in due time
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_mode.c: Sets a user or channel mode.
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			#include "stdinc.h"
26			#include "tools.h"
27			#include "handlers.h"
28			#include "channel.h"
29			#include "channel_mode.h"
30			#include "client.h"
31			#include "hash.h"
32			#include "irc_string.h"
33			#include "sprintf_irc.h"
34			#include "ircd.h"
35			#include "numeric.h"
36			#include "s_user.h"
37			#include "s_conf.h"
38			#include "s_serv.h"
39			#include "send.h"
40			#include "msg.h"
41			#include "parse.h"
42			#include "modules.h"
43			#include "packet.h"
44			#include "common.h"
45
46			static void m_mode(struct Client , struct Client , int, char *[]);
47			static void ms_tmode(struct Client , struct Client , int, char *[]);
48			static void ms_bmask(struct Client , struct Client , int, char *[]);
49
50			struct Message mode_msgtab = {
51			"MODE", 0, 0, 2, 0, MFLG_SLOW, 0,
52			{m_unregistered, m_mode, m_mode, m_ignore, m_mode, m_ignore}
53			};
54
55			struct Message tmode_msgtab = {
56			"TMODE", 0, 0, 4, 0, MFLG_SLOW, 0,
57			{m_ignore, m_ignore, ms_tmode, m_ignore, m_ignore, m_ignore}
58			};
59
60			struct Message bmask_msgtab = {
61			"BMASK", 0, 0, 5, 0, MFLG_SLOW, 0,
62			{m_ignore, m_ignore, ms_bmask, m_ignore, m_ignore, m_ignore}
63			};
64
65			#ifndef STATIC_MODULES
66			void
67			_modinit(void)
68			{
69			mod_add_cmd(&mode_msgtab);
70			mod_add_cmd(&tmode_msgtab);
71			mod_add_cmd(&bmask_msgtab);
72			}
73
74			void
75			_moddeinit(void)
76			{
77			mod_del_cmd(&mode_msgtab);
78			mod_del_cmd(&tmode_msgtab);
79			mod_del_cmd(&bmask_msgtab);
80			}
81
82	knight	31	const char *_version = "$Revision$";
83	adx	30	#endif
84
85			/*
86			* m_mode - MODE command handler
87			* parv[0] - sender
88			* parv[1] - channel
89			*/
90			static void
91			m_mode(struct Client client_p, struct Client source_p,
92			int parc, char *parv[])
93			{
94			struct Channel *chptr = NULL;
95			struct Membership *member;
96			static char modebuf[MODEBUFLEN];
97			static char parabuf[MODEBUFLEN];
98
99	michael	885	if (EmptyString(parv[1]))
100	adx	30	{
101			sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
102			me.name, source_p->name, "MODE");
103			return;
104			}
105
106			/* Now, try to find the channel in question */
107			if (!IsChanPrefix(*parv[1]))
108			{
109			/* if here, it has to be a non-channel name */
110			set_user_mode(client_p, source_p, parc, parv);
111			return;
112			}
113
114	michael	885	if ((chptr = hash_find_channel(parv[1])) == NULL)
115	adx	30	{
116	db	848	sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
117			ID_or_name(&me, source_p->from),
118			ID_or_name(source_p, source_p->from),
119			parv[1]);
120			return;
121			}
122	adx	30
123			/* Now known the channel exists */
124			if (parc < 3)
125			{
126			channel_modes(chptr, source_p, modebuf, parabuf);
127			sendto_one(source_p, form_str(RPL_CHANNELMODEIS),
128			me.name, source_p->name, chptr->chname, modebuf, parabuf);
129			sendto_one(source_p, form_str(RPL_CREATIONTIME),
130			me.name, source_p->name, chptr->chname, chptr->channelts);
131			}
132			/* bounce all modes from people we deop on sjoin
133			* servers have always gotten away with murder,
134			* including telnet servers g - Dianora
135			*
136			* XXX Is it worth the bother to make an ms_mode() ? - Dianora
137			*/
138			else if (IsServer(source_p))
139			{
140			set_channel_mode(client_p, source_p, chptr, NULL, parc - 2, parv + 2,
141			chptr->chname);
142			}
143			else
144			{
145			member = find_channel_link(source_p, chptr);
146
147			if (!has_member_flags(member, CHFL_DEOPPED))
148			{
149			/* Finish the flood grace period... */
150			if (MyClient(source_p) && !IsFloodDone(source_p))
151			{
152			if (!((parc == 3) && (parv[2][0] == 'b') && (parv[2][1] == '\0')))
153			flood_endgrace(source_p);
154			}
155
156			set_channel_mode(client_p, source_p, chptr, member, parc - 2, parv + 2,
157			chptr->chname);
158			}
159			}
160			}
161
162			/*
163			* ms_tmode()
164			*
165			* inputs - parv[0] = UID
166			* parv[1] = TS
167			* parv[2] = channel name
168			* parv[3] = modestring
169			*/
170			static void
171			ms_tmode(struct Client client_p, struct Client source_p, int parc, char *parv[])
172			{
173			struct Channel *chptr = NULL;
174			struct Membership *member = NULL;
175
176			if ((chptr = hash_find_channel(parv[2])) == NULL)
177			{
178			sendto_one(source_p, form_str(ERR_NOSUCHCHANNEL),
179			ID_or_name(&me, client_p), ID_or_name(source_p, client_p), parv[2]);
180			return;
181			}
182
183			if (atol(parv[1]) > chptr->channelts)
184			return;
185
186			if (IsServer(source_p))
187			set_channel_mode(client_p, source_p, chptr, NULL, parc - 3, parv + 3, chptr->chname);
188			else
189			{
190			member = find_channel_link(source_p, chptr);
191
192			/* XXX are we sure we just want to bail here? */
193			if (has_member_flags(member, CHFL_DEOPPED))
194			return;
195
196			set_channel_mode(client_p, source_p, chptr, member, parc - 3, parv + 3, chptr->chname);
197			}
198			}
199
200			/*
201			* ms_bmask()
202			*
203			* inputs - parv[0] = SID
204			* parv[1] = TS
205			* parv[2] = channel name
206			* parv[3] = type of ban to add ('b' 'I' or 'e')
207			* parv[4] = space delimited list of masks to add
208			* outputs - none
209			* side effects - propagates unchanged bmask line to CAP_TS6 servers,
210			* sends plain modes to the others. nothing is sent
211			* to the server the issuing server is connected through
212			*/
213			static void
214			ms_bmask(struct Client client_p, struct Client source_p, int parc, char *parv[])
215			{
216			static char modebuf[IRCD_BUFSIZE];
217			static char parabuf[IRCD_BUFSIZE];
218			static char banbuf[IRCD_BUFSIZE];
219			struct Channel *chptr;
220			char s, t, mbuf, pbuf;
221			long mode_type;
222			int mlen, tlen;
223			int modecount = 0;
224			int needcap = NOCAPS;
225
226			if ((chptr = hash_find_channel(parv[2])) == NULL)
227			return;
228
229			/* TS is higher, drop it. */
230			if (atol(parv[1]) > chptr->channelts)
231			return;
232
233			switch (*parv[3])
234			{
235			case 'b':
236			mode_type = CHFL_BAN;
237			break;
238
239			case 'e':
240			mode_type = CHFL_EXCEPTION;
241			needcap = CAP_EX;
242			break;
243
244			case 'I':
245			mode_type = CHFL_INVEX;
246			needcap = CAP_IE;
247			break;
248
249			/* maybe we should just blindly propagate this? */
250			default:
251			return;
252			}
253
254			parabuf[0] = '\0';
255			s = banbuf;
256			strlcpy(s, parv[4], sizeof(banbuf));
257
258			/* only need to construct one buffer, for non-ts6 servers */
259			mlen = ircsprintf(modebuf, ":%s MODE %s +",
260			source_p->name, chptr->chname);
261			mbuf = modebuf + mlen;
262			pbuf = parabuf;
263
264			do {
265			if ((t = strchr(s, ' ')) != NULL)
266			*t++ = '\0';
267			tlen = strlen(s);
268
269			/* I dont even want to begin parsing this.. */
270			if (tlen > MODEBUFLEN)
271			break;
272
273			if (tlen && *s != ':' && add_id(source_p, chptr, s, mode_type))
274			{
275			/* this new one wont fit.. */
276			if (mbuf - modebuf + 2 + pbuf - parabuf + tlen > IRCD_BUFSIZE - 2 \|\|
277			modecount >= MAXMODEPARAMS)
278			{
279			*mbuf = '\0';
280			*(pbuf - 1) = '\0';
281
282			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s",
283			modebuf, parabuf);
284	michael	885	sendto_server(client_p, chptr, needcap, CAP_TS6,
285	adx	30	"%s %s", modebuf, parabuf);
286
287			mbuf = modebuf + mlen;
288			pbuf = parabuf;
289			modecount = 0;
290			}
291
292			*mbuf++ = parv[3][0];
293			pbuf += ircsprintf(pbuf, "%s ", s);
294			modecount++;
295			}
296
297			s = t;
298			} while (s != NULL);
299
300			if (modecount)
301			{
302			mbuf = (pbuf - 1) = '\0';
303			sendto_channel_local(ALL_MEMBERS, NO, chptr, "%s %s", modebuf, parabuf);
304	michael	885	sendto_server(client_p, chptr, needcap, CAP_TS6,
305	adx	30	"%s %s", modebuf, parabuf);
306			}
307
308			/* assumption here is that since the server sent BMASK, they are TS6, so they have an ID */
309	michael	885	sendto_server(client_p, chptr, CAP_TS6\|needcap, NOCAPS,
310	adx	30	":%s BMASK %lu %s %s :%s",
311			source_p->id, (unsigned long)chptr->channelts, chptr->chname,
312			parv[3], parv[4]);
313			}