ircd-hybrid-8/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 "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 "parse.h"
#include "modules.h"

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, 1,
                        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, 1, server_oper);
      else if (!SecretChannel(chptr))
        do_who_on_channel(source_p, chptr, chptr->chname, 0, server_oper);
    }

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

  /* '/who nick' */
  if (((target_p = hash_find_client(mask)) != NULL) &&
      IsClient(target_p) && (!server_oper || HasUMode(target_p, UMODE_OPER)))
  {
    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 (!HasUMode(target_p, UMODE_INVISIBLE) || HasFlag(target_p, FLAGS_MARK))
      continue;

    if (server_oper && !HasUMode(target_p, UMODE_OPER))
      continue;

    AddFlag(target_p, FLAGS_MARK);

    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 || HasUMode(source_p, UMODE_OPER)) &&
       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;
  static time_t last_used = 0;

  if (!HasUMode(source_p, UMODE_OPER))
  {
    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 (HasUMode(target_p, UMODE_INVISIBLE))
    {
      DelFlag(target_p, FLAGS_MARK);
      continue;
    }

    if (server_oper && !HasUMode(target_p, UMODE_OPER))
      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 || !HasUMode(target_p, UMODE_INVISIBLE))
    {
      if (server_oper && !HasUMode(target_p, UMODE_OPER))
        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 (HasUMode(source_p, UMODE_OPER))
    snprintf(status, sizeof(status), "%c%s%s%s", target_p->away ? 'G' : 'H',
             HasUMode(target_p, UMODE_OPER) ? "*" : "",
             IsCaptured(target_p) ? "#" : "", op_flags);
  else
    snprintf(status, sizeof(status), "%c%s%s", target_p->away ? 'G' : 'H',
             HasUMode(target_p, UMODE_OPER) &&
             !HasUMode(target_p, UMODE_HIDDEN) ? "*" : "", 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,
               HasUMode(source_p, UMODE_OPER) ? 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);
  }
}

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

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

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

struct module module_entry = {
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	1294
Committed:	Wed Feb 22 20:48:30 2012 UTC (14 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	10111 byte(s)
Error occurred while calculating annotation data.
Log Message:	- Add user mode +H which simply hides operator status to other users. This solution replaces current method of hidding operator status where the admin mode is not sent to other servers unless hidden_administrator is disabled. - m_who() now takes care whether an operator is hidden or not
#	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 "client.h"
28	#include "channel.h"
29	#include "channel_mode.h"
30	#include "hash.h"
31	#include "ircd.h"
32	#include "numeric.h"
33	#include "s_serv.h"
34	#include "send.h"
35	#include "irc_string.h"
36	#include "sprintf_irc.h"
37	#include "s_conf.h"
38	#include "parse.h"
39	#include "modules.h"
40
41	static void who_global(struct Client , char , int);
42	static void do_who(struct Client , struct Client ,
43	const char , const char );
44	static void do_who_on_channel(struct Client , struct Channel ,
45	const char *, int, int);
46
47	/*
48	** m_who
49	** parv[0] = sender prefix
50	** parv[1] = nickname mask list
51	** parv[2] = additional selection flag, only 'o' for now.
52	*/
53	static void
54	m_who(struct Client client_p, struct Client source_p,
55	int parc, char *parv[])
56	{
57	struct Client *target_p;
58	char *mask = parv[1];
59	dlink_node *lp;
60	int server_oper = parc > 2 ? (parv[2] == 'o') : 0; / Show OPERS only */
61	struct Channel *chptr;
62
63	/* See if mask is there, collapse it or return if not there */
64	if (EmptyString(mask))
65	{
66	who_global(source_p, mask, server_oper);
67	sendto_one(source_p, form_str(RPL_ENDOFWHO),
68	me.name, source_p->name, "*");
69	return;
70	}
71
72	/* mask isn't NULL at this point. repeat after me... -db */
73	collapse(mask);
74
75	/* '/who ' /
76	if (mask[0] == '*' && !mask[1])
77	{
78	if ((lp = source_p->channel.head) != NULL)
79	{
80	struct Channel mychannel = ((struct Membership )lp->data)->chptr;
81	do_who_on_channel(source_p, mychannel, mychannel->chname, 1,
82	server_oper);
83	}
84
85	sendto_one(source_p, form_str(RPL_ENDOFWHO), me.name, source_p->name, "*");
86	return;
87	}
88
89	/* '/who #some_channel' */
90	if (IsChanPrefix(*mask))
91	{
92	/* List all users on a given channel */
93	if ((chptr = hash_find_channel(mask)) != NULL)
94	{
95	if (IsMember(source_p, chptr))
96	do_who_on_channel(source_p, chptr, chptr->chname, 1, server_oper);
97	else if (!SecretChannel(chptr))
98	do_who_on_channel(source_p, chptr, chptr->chname, 0, server_oper);
99	}
100
101	sendto_one(source_p, form_str(RPL_ENDOFWHO),
102	me.name, source_p->name, mask);
103	return;
104	}
105
106	/* '/who nick' */
107	if (((target_p = hash_find_client(mask)) != NULL) &&
108	IsClient(target_p) && (!server_oper \|\| HasUMode(target_p, UMODE_OPER)))
109	{
110	DLINK_FOREACH(lp, target_p->channel.head)
111	{
112	chptr = ((struct Membership *) lp->data)->chptr;
113	if (PubChannel(chptr) \|\| IsMember(source_p, chptr))
114	break;
115	}
116
117	if (lp != NULL)
118	do_who(source_p, target_p, chptr->chname,
119	get_member_status(lp->data, !!HasCap(source_p, CAP_MULTI_PREFIX)));
120	else
121	do_who(source_p, target_p, NULL, "");
122
123	sendto_one(source_p, form_str(RPL_ENDOFWHO),
124	me.name, source_p->name, mask);
125	return;
126	}
127
128	/* '/who 0' */
129	if (mask[0] == '0' && !mask[1])
130	who_global(source_p, NULL, server_oper);
131	else
132	who_global(source_p, mask, server_oper);
133
134	/* Wasn't a nick, wasn't a channel, wasn't a '' so ... /
135	sendto_one(source_p, form_str(RPL_ENDOFWHO),
136	me.name, source_p->name, mask);
137	}
138
139	/* who_common_channel
140	* inputs - pointer to client requesting who
141	* - pointer to channel member chain.
142	* - char * mask to match
143	* - int if oper on a server or not
144	* - pointer to int maxmatches
145	* output - NONE
146	* side effects - lists matching clients on specified channel,
147	* marks matched clients.
148	*
149	*/
150	static void
151	who_common_channel(struct Client source_p, struct Channel chptr,
152	char mask, int server_oper, int maxmatches)
153	{
154	dlink_node *ptr;
155	struct Client *target_p;
156
157	DLINK_FOREACH(ptr, chptr->members.head)
158	{
159	target_p = ((struct Membership *)ptr->data)->client_p;
160
161	if (!HasUMode(target_p, UMODE_INVISIBLE) \|\| HasFlag(target_p, FLAGS_MARK))
162	continue;
163
164	if (server_oper && !HasUMode(target_p, UMODE_OPER))
165	continue;
166
167	AddFlag(target_p, FLAGS_MARK);
168
169	assert(target_p->servptr != NULL);
170
171	if ((mask == NULL) \|\|
172	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
173	match(mask, target_p->host) \|\|
174	((!ConfigServerHide.hide_servers \|\| HasUMode(source_p, UMODE_OPER)) &&
175	match(mask, target_p->servptr->name)) \|\|
176	match(mask, target_p->info))
177	{
178	do_who(source_p, target_p, NULL, "");
179
180	if (*maxmatches > 0)
181	{
182	if (--(*maxmatches) == 0)
183	return;
184	}
185	}
186	}
187	}
188
189	/* who_global()
190	*
191	* inputs - pointer to client requesting who
192	* - char * mask to match
193	* - int if oper on a server or not
194	* output - NONE
195	* side effects - do a global scan of all clients looking for match
196	* this is slightly expensive on EFnet ...
197	*/
198	static void
199	who_global(struct Client source_p, char mask, int server_oper)
200	{
201	struct Channel *chptr;
202	struct Client *target_p;
203	dlink_node *lp;
204	dlink_node *lp_next;
205	dlink_node *gcptr;
206	dlink_node *gcptr_next;
207	int maxmatches = 500;
208	static time_t last_used = 0;
209
210	if (!HasUMode(source_p, UMODE_OPER))
211	{
212	if ((last_used + ConfigFileEntry.pace_wait) > CurrentTime)
213	{
214	/* safe enough to give this on a local connect only */
215	sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name);
216	return;
217	}
218
219	last_used = CurrentTime;
220	}
221
222	/* first, list all matching invisible clients on common channels */
223	DLINK_FOREACH_SAFE(lp, lp_next, source_p->channel.head)
224	{
225	chptr = ((struct Membership *)lp->data)->chptr;
226	who_common_channel(source_p, chptr, mask, server_oper, &maxmatches);
227	}
228
229	/* second, list all matching visible clients */
230	DLINK_FOREACH_SAFE(gcptr, gcptr_next, global_client_list.head)
231	{
232	target_p = gcptr->data;
233
234	if (!IsClient(target_p))
235	continue;
236
237	if (HasUMode(target_p, UMODE_INVISIBLE))
238	{
239	DelFlag(target_p, FLAGS_MARK);
240	continue;
241	}
242
243	if (server_oper && !HasUMode(target_p, UMODE_OPER))
244	continue;
245
246	assert(target_p->servptr != NULL);
247
248	if (!mask \|\|
249	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
250	match(mask, target_p->host) \|\| match(mask, target_p->servptr->name) \|\|
251	match(mask, target_p->info))
252	{
253	do_who(source_p, target_p, NULL, "");
254
255	if (maxmatches > 0)
256	{
257	if (--maxmatches == 0)
258	return;
259	}
260	}
261	}
262	}
263
264	/* do_who_on_channel()
265	*
266	* inputs - pointer to client requesting who
267	* - pointer to channel to do who on
268	* - The "real name" of this channel
269	* - int if source_p is a server oper or not
270	* - int if client is member or not
271	* - int server_op flag
272	* output - NONE
273	* side effects - do a who on given channel
274	*/
275	static void
276	do_who_on_channel(struct Client source_p, struct Channel chptr,
277	const char *chname, int member, int server_oper)
278	{
279	dlink_node ptr = NULL, ptr_next = NULL;
280	struct Client *target_p;
281	struct Membership *ms;
282
283	DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
284	{
285	ms = ptr->data;
286	target_p = ms->client_p;
287
288	if (member \|\| !HasUMode(target_p, UMODE_INVISIBLE))
289	{
290	if (server_oper && !HasUMode(target_p, UMODE_OPER))
291	continue;
292	do_who(source_p, target_p, chname, get_member_status(ms, !!HasCap(source_p, CAP_MULTI_PREFIX)));
293	}
294	}
295	}
296
297	/* do_who()
298	*
299	* inputs - pointer to client requesting who
300	* - pointer to client to do who on
301	* - The reported name
302	* - channel flags
303	* output - NONE
304	* side effects - do a who on given person
305	*/
306	static void
307	do_who(struct Client source_p, struct Client target_p,
308	const char chname, const char op_flags)
309	{
310	char status[8]; /* G#@%+\0 /
311
312	if (HasUMode(source_p, UMODE_OPER))
313	snprintf(status, sizeof(status), "%c%s%s%s", target_p->away ? 'G' : 'H',
314	HasUMode(target_p, UMODE_OPER) ? "*" : "",
315	IsCaptured(target_p) ? "#" : "", op_flags);
316	else
317	snprintf(status, sizeof(status), "%c%s%s", target_p->away ? 'G' : 'H',
318	HasUMode(target_p, UMODE_OPER) &&
319	!HasUMode(target_p, UMODE_HIDDEN) ? "*" : "", op_flags);
320
321	if (ConfigServerHide.hide_servers)
322	{
323	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
324	(chname) ? (chname) : "*",
325	target_p->username, target_p->host,
326	HasUMode(source_p, UMODE_OPER) ? target_p->servptr->name : "*",
327	target_p->name, status, 0, target_p->info);
328	}
329	else
330	{
331	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
332	(chname) ? (chname) : "*", target_p->username,
333	target_p->host, target_p->servptr->name, target_p->name,
334	status, target_p->hopcount, target_p->info);
335	}
336	}
337
338	static struct Message who_msgtab = {
339	"WHO", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
340	{m_unregistered, m_who, m_ignore, m_ignore, m_who, m_ignore}
341	};
342
343	static void
344	module_init(void)
345	{
346	mod_add_cmd(&who_msgtab);
347	}
348
349	static void
350	module_exit(void)
351	{
352	mod_del_cmd(&who_msgtab);
353	}
354
355	struct module module_entry = {
356	.node = { NULL, NULL, NULL },
357	.name = NULL,
358	.version = "$Revision$",
359	.handle = NULL,
360	.modinit = module_init,
361	.modexit = module_exit,
362	.flags = 0
363	};