trunk/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 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 = 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) ? "*" : "", 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:	1230
Committed:	Thu Sep 22 19:41:19 2011 UTC (12 years, 6 months ago) by michael
Content type:	text/x-csrc
Original Path:	*ircd-hybrid-8/modules/m_who.c*
File size:	10128 byte(s)
Log Message:	- cleanup module loader. Make module api more flexible
#	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 void who_global(struct Client , char , int);
45	static void do_who(struct Client , struct Client ,
46	const char , const char );
47	static void do_who_on_channel(struct Client , struct Channel ,
48	const char *, int, int);
49
50	/*
51	** m_who
52	** parv[0] = sender prefix
53	** parv[1] = nickname mask list
54	** parv[2] = additional selection flag, only 'o' for now.
55	*/
56	static void
57	m_who(struct Client client_p, struct Client source_p,
58	int parc, char *parv[])
59	{
60	struct Client *target_p;
61	char *mask = parv[1];
62	dlink_node *lp;
63	int server_oper = parc > 2 ? (parv[2] == 'o') : 0; / Show OPERS only */
64	struct Channel *chptr;
65
66	/* See if mask is there, collapse it or return if not there */
67	if (EmptyString(mask))
68	{
69	who_global(source_p, mask, server_oper);
70	sendto_one(source_p, form_str(RPL_ENDOFWHO),
71	me.name, source_p->name, "*");
72	return;
73	}
74
75	/* mask isn't NULL at this point. repeat after me... -db */
76	collapse(mask);
77
78	/* '/who ' /
79	if (mask[0] == '*' && !mask[1])
80	{
81	if ((lp = source_p->channel.head) != NULL)
82	{
83	struct Channel mychannel = ((struct Membership )lp->data)->chptr;
84	do_who_on_channel(source_p, mychannel, mychannel->chname, YES,
85	server_oper);
86	}
87
88	sendto_one(source_p, form_str(RPL_ENDOFWHO), me.name, source_p->name, "*");
89	return;
90	}
91
92	/* '/who #some_channel' */
93	if (IsChanPrefix(*mask))
94	{
95	/* List all users on a given channel */
96	if ((chptr = hash_find_channel(mask)) != NULL)
97	{
98	if (IsMember(source_p, chptr))
99	do_who_on_channel(source_p, chptr, chptr->chname, YES, server_oper);
100	else if (!SecretChannel(chptr))
101	do_who_on_channel(source_p, chptr, chptr->chname, NO, server_oper);
102	}
103
104	sendto_one(source_p, form_str(RPL_ENDOFWHO),
105	me.name, source_p->name, mask);
106	return;
107	}
108
109	/* '/who nick' */
110	if (((target_p = hash_find_client(mask)) != NULL) &&
111	IsClient(target_p) && (!server_oper \|\| HasUMode(target_p, UMODE_OPER)))
112	{
113	DLINK_FOREACH(lp, target_p->channel.head)
114	{
115	chptr = ((struct Membership *) lp->data)->chptr;
116	if (PubChannel(chptr) \|\| IsMember(source_p, chptr))
117	break;
118	}
119
120	if (lp != NULL)
121	do_who(source_p, target_p, chptr->chname,
122	get_member_status(lp->data, !!HasCap(source_p, CAP_MULTI_PREFIX)));
123	else
124	do_who(source_p, target_p, NULL, "");
125
126	sendto_one(source_p, form_str(RPL_ENDOFWHO),
127	me.name, source_p->name, mask);
128	return;
129	}
130
131	/* '/who 0' */
132	if (mask[0] == '0' && !mask[1])
133	who_global(source_p, NULL, server_oper);
134	else
135	who_global(source_p, mask, server_oper);
136
137	/* Wasn't a nick, wasn't a channel, wasn't a '' so ... /
138	sendto_one(source_p, form_str(RPL_ENDOFWHO),
139	me.name, source_p->name, mask);
140	}
141
142	/* who_common_channel
143	* inputs - pointer to client requesting who
144	* - pointer to channel member chain.
145	* - char * mask to match
146	* - int if oper on a server or not
147	* - pointer to int maxmatches
148	* output - NONE
149	* side effects - lists matching clients on specified channel,
150	* marks matched clients.
151	*
152	*/
153	static void
154	who_common_channel(struct Client source_p, struct Channel chptr,
155	char mask, int server_oper, int maxmatches)
156	{
157	dlink_node *ptr;
158	struct Client *target_p;
159
160	DLINK_FOREACH(ptr, chptr->members.head)
161	{
162	target_p = ((struct Membership *)ptr->data)->client_p;
163
164	if (!HasUMode(target_p, UMODE_INVISIBLE) \|\| HasFlag(target_p, FLAGS_MARK))
165	continue;
166
167	if (server_oper && !HasUMode(target_p, UMODE_OPER))
168	continue;
169
170	AddFlag(target_p, FLAGS_MARK);
171
172	assert(target_p->servptr != NULL);
173
174	if ((mask == NULL) \|\|
175	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
176	match(mask, target_p->host) \|\|
177	((!ConfigServerHide.hide_servers \|\| HasUMode(source_p, UMODE_OPER)) &&
178	match(mask, target_p->servptr->name)) \|\|
179	match(mask, target_p->info))
180	{
181	do_who(source_p, target_p, NULL, "");
182
183	if (*maxmatches > 0)
184	{
185	if (--(*maxmatches) == 0)
186	return;
187	}
188	}
189	}
190	}
191
192	/* who_global()
193	*
194	* inputs - pointer to client requesting who
195	* - char * mask to match
196	* - int if oper on a server or not
197	* output - NONE
198	* side effects - do a global scan of all clients looking for match
199	* this is slightly expensive on EFnet ...
200	*/
201	static void
202	who_global(struct Client source_p, char mask, int server_oper)
203	{
204	struct Channel *chptr;
205	struct Client *target_p;
206	dlink_node *lp;
207	dlink_node *lp_next;
208	dlink_node *gcptr;
209	dlink_node *gcptr_next;
210	int maxmatches = 500;
211	static time_t last_used = 0;
212
213	if (!HasUMode(source_p, UMODE_OPER))
214	{
215	if ((last_used + ConfigFileEntry.pace_wait) > CurrentTime)
216	{
217	/* safe enough to give this on a local connect only */
218	sendto_one(source_p, form_str(RPL_LOAD2HI), me.name, source_p->name);
219	return;
220	}
221
222	last_used = CurrentTime;
223	}
224
225	/* first, list all matching invisible clients on common channels */
226	DLINK_FOREACH_SAFE(lp, lp_next, source_p->channel.head)
227	{
228	chptr = ((struct Membership *)lp->data)->chptr;
229	who_common_channel(source_p, chptr, mask, server_oper, &maxmatches);
230	}
231
232	/* second, list all matching visible clients */
233	DLINK_FOREACH_SAFE(gcptr, gcptr_next, global_client_list.head)
234	{
235	target_p = gcptr->data;
236
237	if (!IsClient(target_p))
238	continue;
239
240	if (HasUMode(target_p, UMODE_INVISIBLE))
241	{
242	DelFlag(target_p, FLAGS_MARK);
243	continue;
244	}
245
246	if (server_oper && !HasUMode(target_p, UMODE_OPER))
247	continue;
248
249	assert(target_p->servptr != NULL);
250
251	if (!mask \|\|
252	match(mask, target_p->name) \|\| match(mask, target_p->username) \|\|
253	match(mask, target_p->host) \|\| match(mask, target_p->servptr->name) \|\|
254	match(mask, target_p->info))
255	{
256	do_who(source_p, target_p, NULL, "");
257
258	if (maxmatches > 0)
259	{
260	if (--maxmatches == 0)
261	return;
262	}
263	}
264	}
265	}
266
267	/* do_who_on_channel()
268	*
269	* inputs - pointer to client requesting who
270	* - pointer to channel to do who on
271	* - The "real name" of this channel
272	* - int if source_p is a server oper or not
273	* - int if client is member or not
274	* - int server_op flag
275	* output - NONE
276	* side effects - do a who on given channel
277	*/
278	static void
279	do_who_on_channel(struct Client source_p, struct Channel chptr,
280	const char *chname, int member, int server_oper)
281	{
282	dlink_node ptr = NULL, ptr_next = NULL;
283	struct Client *target_p;
284	struct Membership *ms;
285
286	DLINK_FOREACH_SAFE(ptr, ptr_next, chptr->members.head)
287	{
288	ms = ptr->data;
289	target_p = ms->client_p;
290
291	if (member \|\| !HasUMode(target_p, UMODE_INVISIBLE))
292	{
293	if (server_oper && !HasUMode(target_p, UMODE_OPER))
294	continue;
295	do_who(source_p, target_p, chname, get_member_status(ms, !!HasCap(source_p, CAP_MULTI_PREFIX)));
296	}
297	}
298	}
299
300	/* do_who()
301	*
302	* inputs - pointer to client requesting who
303	* - pointer to client to do who on
304	* - The reported name
305	* - channel flags
306	* output - NONE
307	* side effects - do a who on given person
308	*/
309	static void
310	do_who(struct Client source_p, struct Client target_p,
311	const char chname, const char op_flags)
312	{
313	char status[8]; /* G#@%+\0 /
314
315	if (HasUMode(source_p, UMODE_OPER))
316	snprintf(status, sizeof(status), "%c%s%s%s", target_p->away ? 'G' : 'H',
317	HasUMode(target_p, UMODE_OPER) ? "*" : "",
318	IsCaptured(target_p) ? "#" : "", op_flags);
319	else
320	snprintf(status, sizeof(status), "%c%s%s", target_p->away ? 'G' : 'H',
321	HasUMode(target_p, UMODE_OPER) ? "*" : "", op_flags);
322
323	if (ConfigServerHide.hide_servers)
324	{
325	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
326	(chname) ? (chname) : "*",
327	target_p->username, target_p->host,
328	HasUMode(source_p, UMODE_OPER) ? target_p->servptr->name : "*",
329	target_p->name, status, 0, target_p->info);
330	}
331	else
332	{
333	sendto_one(source_p, form_str(RPL_WHOREPLY), me.name, source_p->name,
334	(chname) ? (chname) : "*", target_p->username,
335	target_p->host, target_p->servptr->name, target_p->name,
336	status, target_p->hopcount, target_p->info);
337	}
338	}
339
340	static struct Message who_msgtab = {
341	"WHO", 0, 0, 2, MAXPARA, MFLG_SLOW, 0,
342	{m_unregistered, m_who, m_ignore, m_ignore, m_who, m_ignore}
343	};
344
345	static void
346	module_init(void)
347	{
348	mod_add_cmd(&who_msgtab);
349	}
350
351	static void
352	module_exit(void)
353	{
354	mod_del_cmd(&who_msgtab);
355	}
356
357	struct module module_entry = {
358	.node = { NULL, NULL, NULL },
359	.name = NULL,
360	.version = "$Revision$",
361	.handle = NULL,
362	.modinit = module_init,
363	.modexit = module_exit,
364	.flags = 0
365	};