newio/modules/m_who.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_who.c: Shows who is on a channel.
 *
 *  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 "list.h"
#include "common.h"   
#include "handlers.h"
#include "client.h"
#include "channel.h"
#include "channel_mode.h"
#include "hash.h"
#include "ircd.h"
#include "numeric.h"
#include "s_serv.h"
#include "send.h"
#include "irc_string.h"
#include "sprintf_irc.h"
#include "s_conf.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"

static time_t last_used = 0;

static void m_who(struct Client *, struct Client *, int, char *[]);

struct Message who_msgtab = {
  "WHO", 0, 0, 2, 0, MFLG_SLOW, 0,
  {m_unregistered, m_who, m_ignore, m_ignore, m_who, m_ignore}
};

void
_modinit(void)
{
  mod_add_cmd(&who_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&who_msgtab);
}

const char *_version = "$Revision$";

static void who_global(struct Client *, char *, int);
static void do_who(struct Client *, struct Client *,
                   const char *, const char *);
static void do_who_on_channel(struct Client *, struct Channel *,
                              const char *, int, int);

/*
** m_who
**      parv[0] = sender prefix
**      parv[1] = nickname mask list
**      parv[2] = additional selection flag, only 'o' for now.
*/
static void
m_who(struct Client *client_p, struct Client *source_p,
      int parc, char *parv[])
{
  struct Client *target_p;
  char *mask = parv[1];
  dlink_node *lp;
  int server_oper = parc > 2 ? (*parv[2] == 'o') : 0; /* Show OPERS only */
  struct Channel *chptr;

  /* See if mask is there, collapse it or return if not there */
  if (EmptyString(mask))
  {
    who_global(source_p, mask, server_oper);
    sendto_one(source_p, form_str(RPL_ENDOFWHO),
               me.name, source_p->name, "*");
    return;
  }

  /* mask isn't NULL at this point. repeat after me... -db */
  collapse(mask);

  /* '/who *' */
  if (mask[0] == '*' && !mask[1])
  {
    if ((lp = source_p->channel.head) != NULL)
    {
      struct Channel *mychannel = ((struct Membership *)lp->data)->chptr;
      do_who_on_channel(source_p, mychannel, mychannel->chname, YES,
                        server_oper);
    }

    sendto_one(source_p, form_str(RPL_ENDOFWHO), me.name, source_p->name, "*");
    return;
  }

  /* '/who #some_channel' */
  if (IsChanPrefix(*mask))
  {
    /* List all users on a given channel */
    if ((chptr = hash_find_channel(mask)) != NULL)
    {
      if (IsMember(source_p, chptr))
        do_who_on_channel(source_p, chptr, chptr->chname, YES, server_oper);
      else if (!SecretChannel(chptr))
        do_who_on_channel(source_p, chptr, chptr->chname, NO, server_oper);
    }

    sendto_one(source_p, form_str(RPL_ENDOFWHO),
               me.name, source_p->name, mask);
    return;
  }

  /* '/who nick' */
  if (((target_p = find_client(mask)) != NULL) &&
      IsClient(target_p) && (!server_oper || IsOper(target_p)))
  {
    DLINK_FOREACH(lp, target_p->channel.head)
    {
      chptr = ((struct Membership *) lp->data)->chptr;
      if (PubChannel(chptr) || IsMember(source_p, chptr))
        break;
    }

    if (lp != NULL)
      do_who(source_p, target_p, chptr->chname,
             get_member_status(lp->data, !!HasCap(source_p, CAP_MULTI_PREFIX)));
    else
      do_who(source_p, target_p, NULL, "");

    sendto_one(source_p, form_str(RPL_ENDOFWHO),
               me.name, source_p->name, mask);
    return;
  }

  /* '/who 0' */
  if (mask[0] == '0' && !mask[1])
    who_global(source_p, NULL, server_oper);
  else
    who_global(source_p, mask, server_oper);

  /* Wasn't a nick, wasn't a channel, wasn't a '*' so ... */
  sendto_one(source_p, form_str(RPL_ENDOFWHO),
             me.name, source_p->name, mask);
}

/* who_common_channel
 * inputs       - pointer to client requesting who
 *              - pointer to channel member chain.
 *              - char * mask to match
 *              - int if oper on a server or not
 *              - pointer to int maxmatches
 * output       - NONE
 * side effects - lists matching clients on specified channel,
 *                marks matched clients.
 *
 */
static void
who_common_channel(struct Client *source_p, struct Channel *chptr,
                   char *mask, int server_oper, int *maxmatches)
{
  dlink_node *ptr;
  struct Client *target_p;

  DLINK_FOREACH(ptr, chptr->members.head)
  {
    target_p = ((struct Membership *)ptr->data)->client_p;

    if (!IsInvisible(target_p) || IsMarked(target_p))
      continue;

    if (server_oper && !IsOper(target_p))
      continue;

    SetMark(target_p);

    assert(target_p->servptr != NULL);

    if ((mask == NULL) ||
      match(mask, target_p->name) || match(mask, target_p->username) ||
      match(mask, target_p->host) || 
      ((!ConfigServerHide.hide_servers || IsOper(source_p)) &&
       match(mask, target_p->servptr->name)) ||
      match(mask, target_p->info))
    {
      do_who(source_p, target_p, NULL, "");

      if (*maxmatches > 0)
      {
        if (--(*maxmatches) == 0)
          return;
      }
    }
  }
}

/* who_global()
 *
 * inputs       - pointer to client requesting who
 *              - char * mask to match
 *              - int if oper on a server or not
 * output       - NONE
 * side effects - do a global scan of all clients looking for match
 *                this is slightly expensive on EFnet ...
 */
static void
who_global(struct Client *source_p, char *mask, int server_oper)
{
  struct Channel *chptr;
  struct Client *target_p;
  dlink_node *lp;
  dlink_node *lp_next;
  dlink_node *gcptr;
  dlink_node *gcptr_next;
  int maxmatches = 500;

  if (!IsOper(source_p))
  {
    if ((last_used + ConfigFileEntry.pace_wait) > CurrentTime)
    {
      /* safe enough to give this on a local connect only */
      sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name);
      return;
    }

    last_used = CurrentTime;
  }

  /* first, list all matching invisible clients on common channels */
  DLINK_FOREACH_SAFE(lp, lp_next, source_p->channel.head)
  {
    chptr = ((struct Membership *)lp->data)->chptr;
    who_common_channel(source_p, chptr, mask, server_oper, &maxmatches);
  }

  /* second, list all matching visible clients */
  DLINK_FOREACH_SAFE(gcptr, gcptr_next, global_client_list.head)
  {
    target_p = gcptr->data;

    if (!IsClient(target_p))
      continue;

    if (IsInvisible(target_p))
    {
      ClearMark(target_p);
      continue;
    }

    if (server_oper && !IsOper(target_p))
      continue;

    assert(target_p->servptr != NULL);

    if (!mask ||
        match(mask, target_p->name) || match(mask, target_p->username) ||
        match(mask, target_p->host) || match(mask, target_p->servptr->name) ||
        match(mask, target_p->info))
    {
      do_who(source_p, target_p, NULL, "");

      if (maxmatches > 0)
      {
        if (--maxmatches == 0)
          return;
      }
    }
  }
}

/* do_who_on_channel()
 *
 * inputs       - pointer to client requesting who
 *              - pointer to channel to do who on
 *              - The "real name" of this channel
 *              - int if source_p is a server oper or not
 *              - int if client is member or not
 *              - int server_op flag
 * output       - NONE
 * side effects - do a who on given channel
 */
static void
do_who_on_channel(struct Client *source_p, struct Channel *chptr,
                  const char *chname, int member, int server_oper)
{
  dlink_node *ptr = NULL, *ptr_next = NULL;
  struct Client *target_p;
  struct Membership *ms;

  DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
  {
    ms = ptr->data;
    target_p = ms->client_p;

    if (member || !IsInvisible(target_p))
    {
      if (server_oper && !IsOper(target_p))
        continue;
      do_who(source_p, target_p, chname, get_member_status(ms, !!HasCap(source_p, CAP_MULTI_PREFIX)));
    }
  }
}

/* do_who()
 *
 * inputs       - pointer to client requesting who
 *              - pointer to client to do who on
 *              - The reported name
 *              - channel flags
 * output       - NONE
 * side effects - do a who on given person
 */
static void
do_who(struct Client *source_p, struct Client *target_p,
       const char *chname, const char *op_flags)
{
  char status[8]; /* G*#@%+\0 */

  if (IsOper(source_p))
    snprintf(status, sizeof(status), "%c%s%s%s", target_p->away ? 'G' : 'H',
               IsOper(target_p) ? "*" : "", IsCaptured(target_p) ? "#" : "", op_flags);
  else
    snprintf(status, sizeof(status), "%c%s%s", target_p->away ? 'G' : 'H',
               IsOper(target_p) ? "*" : "", op_flags);

  if (ConfigServerHide.hide_servers)
  {
    sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
               (chname) ? (chname) : "*",
               target_p->username, target_p->host,
               IsOper(source_p) ? target_p->servptr->name : "*",
               target_p->name, status, 0, target_p->info);
  }
  else
  {
    sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
               (chname) ? (chname) : "*", target_p->username,
               target_p->host, target_p->servptr->name, target_p->name,
               status, target_p->hopcount, target_p->info);
  }
}
Revision:	1155
Committed:	Tue Aug 9 20:27:45 2011 UTC (12 years, 8 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid/modules/m_who.c*
File size:	9758 byte(s)
Log Message:	- recreate "trunk"
#	Content
1	/*
2	* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3	* m_who.c: Shows who is on a channel.
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	* $Id$
23	*/
24
25	#include "stdinc.h"
26	#include "list.h"
27	#include "common.h"
28	#include "handlers.h"
29	#include "client.h"
30	#include "channel.h"
31	#include "channel_mode.h"
32	#include "hash.h"
33	#include "ircd.h"
34	#include "numeric.h"
35	#include "s_serv.h"
36	#include "send.h"
37	#include "irc_string.h"
38	#include "sprintf_irc.h"
39	#include "s_conf.h"
40	#include "msg.h"
41	#include "parse.h"
42	#include "modules.h"
43
44	static time_t last_used = 0;
45
46	static void m_who(struct Client , struct Client , int, char *[]);
47
48	struct Message who_msgtab = {
49	"WHO", 0, 0, 2, 0, MFLG_SLOW, 0,
50	{m_unregistered, m_who, m_ignore, m_ignore, m_who, m_ignore}
51	};
52
53	void
54	_modinit(void)
55	{
56	mod_add_cmd(&who_msgtab);
57	}
58
59	void
60	_moddeinit(void)
61	{
62	mod_del_cmd(&who_msgtab);
63	}
64
65	const char *_version = "$Revision$";
66
67	static void who_global(struct Client , char , int);
68	static void do_who(struct Client , struct Client ,
69	const char , const char );
70	static void do_who_on_channel(struct Client , struct Channel ,
71	const char *, int, int);
72
73	/*
74	** m_who
75	** parv[0] = sender prefix
76	** parv[1] = nickname mask list
77	** parv[2] = additional selection flag, only 'o' for now.
78	*/
79	static void
80	m_who(struct Client client_p, struct Client source_p,
81	int parc, char *parv[])
82	{
83	struct Client *target_p;
84	char *mask = parv[1];
85	dlink_node *lp;
86	int server_oper = parc > 2 ? (parv[2] == 'o') : 0; / Show OPERS only */
87	struct Channel *chptr;
88
89	/* See if mask is there, collapse it or return if not there */
90	if (EmptyString(mask))
91	{
92	who_global(source_p, mask, server_oper);
93	sendto_one(source_p, form_str(RPL_ENDOFWHO),
94	me.name, source_p->name, "*");
95	return;
96	}
97
98	/* mask isn't NULL at this point. repeat after me... -db */
99	collapse(mask);
100
101	/* '/who ' /
102	if (mask[0] == '*' && !mask[1])
103	{
104	if ((lp = source_p->channel.head) != NULL)
105	{
106	struct Channel mychannel = ((struct Membership )lp->data)->chptr;
107	do_who_on_channel(source_p, mychannel, mychannel->chname, YES,
108	server_oper);
109	}
110
111	sendto_one(source_p, form_str(RPL_ENDOFWHO), me.name, source_p->name, "*");
112	return;
113	}
114
115	/* '/who #some_channel' */
116	if (IsChanPrefix(*mask))
117	{
118	/* List all users on a given channel */
119	if ((chptr = hash_find_channel(mask)) != NULL)
120	{
121	if (IsMember(source_p, chptr))
122	do_who_on_channel(source_p, chptr, chptr->chname, YES, server_oper);
123	else if (!SecretChannel(chptr))
124	do_who_on_channel(source_p, chptr, chptr->chname, NO, server_oper);
125	}
126
127	sendto_one(source_p, form_str(RPL_ENDOFWHO),
128	me.name, source_p->name, mask);
129	return;
130	}
131
132	/* '/who nick' */
133	if (((target_p = find_client(mask)) != NULL) &&
134	IsClient(target_p) && (!server_oper \|\| IsOper(target_p)))
135	{
136	DLINK_FOREACH(lp, target_p->channel.head)
137	{
138	chptr = ((struct Membership *) lp->data)->chptr;
139	if (PubChannel(chptr) \|\| IsMember(source_p, chptr))
140	break;
141	}
142
143	if (lp != NULL)
144	do_who(source_p, target_p, chptr->chname,
145	get_member_status(lp->data, !!HasCap(source_p, CAP_MULTI_PREFIX)));
146	else
147	do_who(source_p, target_p, NULL, "");
148
149	sendto_one(source_p, form_str(RPL_ENDOFWHO),
150	me.name, source_p->name, mask);
151	return;
152	}
153
154	/* '/who 0' */
155	if (mask[0] == '0' && !mask[1])
156	who_global(source_p, NULL, server_oper);
157	else
158	who_global(source_p, mask, server_oper);
159
160	/* Wasn't a nick, wasn't a channel, wasn't a '' so ... /
161	sendto_one(source_p, form_str(RPL_ENDOFWHO),
162	me.name, source_p->name, mask);
163	}
164
165	/* who_common_channel
166	* inputs - pointer to client requesting who
167	* - pointer to channel member chain.
168	* - char * mask to match
169	* - int if oper on a server or not
170	* - pointer to int maxmatches
171	* output - NONE
172	* side effects - lists matching clients on specified channel,
173	* marks matched clients.
174	*
175	*/
176	static void
177	who_common_channel(struct Client source_p, struct Channel chptr,
178	char mask, int server_oper, int maxmatches)
179	{
180	dlink_node *ptr;
181	struct Client *target_p;
182
183	DLINK_FOREACH(ptr, chptr->members.head)
184	{
185	target_p = ((struct Membership *)ptr->data)->client_p;
186
187	if (!IsInvisible(target_p) \|\| IsMarked(target_p))
188	continue;
189
190	if (server_oper && !IsOper(target_p))
191	continue;
192
193	SetMark(target_p);
194
195	assert(target_p->servptr != NULL);
196
197	if ((mask == NULL) \|\|
198	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
199	match(mask, target_p->host) \|\|
200	((!ConfigServerHide.hide_servers \|\| IsOper(source_p)) &&
201	match(mask, target_p->servptr->name)) \|\|
202	match(mask, target_p->info))
203	{
204	do_who(source_p, target_p, NULL, "");
205
206	if (*maxmatches > 0)
207	{
208	if (--(*maxmatches) == 0)
209	return;
210	}
211	}
212	}
213	}
214
215	/* who_global()
216	*
217	* inputs - pointer to client requesting who
218	* - char * mask to match
219	* - int if oper on a server or not
220	* output - NONE
221	* side effects - do a global scan of all clients looking for match
222	* this is slightly expensive on EFnet ...
223	*/
224	static void
225	who_global(struct Client source_p, char mask, int server_oper)
226	{
227	struct Channel *chptr;
228	struct Client *target_p;
229	dlink_node *lp;
230	dlink_node *lp_next;
231	dlink_node *gcptr;
232	dlink_node *gcptr_next;
233	int maxmatches = 500;
234
235	if (!IsOper(source_p))
236	{
237	if ((last_used + ConfigFileEntry.pace_wait) > CurrentTime)
238	{
239	/* safe enough to give this on a local connect only */
240	sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name);
241	return;
242	}
243
244	last_used = CurrentTime;
245	}
246
247	/* first, list all matching invisible clients on common channels */
248	DLINK_FOREACH_SAFE(lp, lp_next, source_p->channel.head)
249	{
250	chptr = ((struct Membership *)lp->data)->chptr;
251	who_common_channel(source_p, chptr, mask, server_oper, &maxmatches);
252	}
253
254	/* second, list all matching visible clients */
255	DLINK_FOREACH_SAFE(gcptr, gcptr_next, global_client_list.head)
256	{
257	target_p = gcptr->data;
258
259	if (!IsClient(target_p))
260	continue;
261
262	if (IsInvisible(target_p))
263	{
264	ClearMark(target_p);
265	continue;
266	}
267
268	if (server_oper && !IsOper(target_p))
269	continue;
270
271	assert(target_p->servptr != NULL);
272
273	if (!mask \|\|
274	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
275	match(mask, target_p->host) \|\| match(mask, target_p->servptr->name) \|\|
276	match(mask, target_p->info))
277	{
278	do_who(source_p, target_p, NULL, "");
279
280	if (maxmatches > 0)
281	{
282	if (--maxmatches == 0)
283	return;
284	}
285	}
286	}
287	}
288
289	/* do_who_on_channel()
290	*
291	* inputs - pointer to client requesting who
292	* - pointer to channel to do who on
293	* - The "real name" of this channel
294	* - int if source_p is a server oper or not
295	* - int if client is member or not
296	* - int server_op flag
297	* output - NONE
298	* side effects - do a who on given channel
299	*/
300	static void
301	do_who_on_channel(struct Client source_p, struct Channel chptr,
302	const char *chname, int member, int server_oper)
303	{
304	dlink_node ptr = NULL, ptr_next = NULL;
305	struct Client *target_p;
306	struct Membership *ms;
307
308	DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
309	{
310	ms = ptr->data;
311	target_p = ms->client_p;
312
313	if (member \|\| !IsInvisible(target_p))
314	{
315	if (server_oper && !IsOper(target_p))
316	continue;
317	do_who(source_p, target_p, chname, get_member_status(ms, !!HasCap(source_p, CAP_MULTI_PREFIX)));
318	}
319	}
320	}
321
322	/* do_who()
323	*
324	* inputs - pointer to client requesting who
325	* - pointer to client to do who on
326	* - The reported name
327	* - channel flags
328	* output - NONE
329	* side effects - do a who on given person
330	*/
331	static void
332	do_who(struct Client source_p, struct Client target_p,
333	const char chname, const char op_flags)
334	{
335	char status[8]; /* G#@%+\0 /
336
337	if (IsOper(source_p))
338	snprintf(status, sizeof(status), "%c%s%s%s", target_p->away ? 'G' : 'H',
339	IsOper(target_p) ? "*" : "", IsCaptured(target_p) ? "#" : "", op_flags);
340	else
341	snprintf(status, sizeof(status), "%c%s%s", target_p->away ? 'G' : 'H',
342	IsOper(target_p) ? "*" : "", op_flags);
343
344	if (ConfigServerHide.hide_servers)
345	{
346	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
347	(chname) ? (chname) : "*",
348	target_p->username, target_p->host,
349	IsOper(source_p) ? target_p->servptr->name : "*",
350	target_p->name, status, 0, target_p->info);
351	}
352	else
353	{
354	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
355	(chname) ? (chname) : "*", target_p->username,
356	target_p->host, target_p->servptr->name, target_p->name,
357	status, target_p->hopcount, target_p->info);
358	}
359	}