8.2.x/modules/m_who.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2020 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
 *  USA
 */

/*! \file m_who.c
 * \brief Includes required functions for processing the WHO command.
 * \version $Id$
 */

#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 "server.h"
#include "send.h"
#include "irc_string.h"
#include "conf.h"
#include "parse.h"
#include "modules.h"
#include "hostmask.h"


enum { WHO_MAX_REPLIES = 500 };


/* 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, const struct Client *target_p,
       const char *name, const char *op_flags)
{
  char status[8] = "";  /* sizeof("Gr*@%+") + 2 */

  if (HasUMode(source_p, UMODE_OPER))
    snprintf(status, sizeof(status), "%c%s%s%s", target_p->away[0] ? 'G' : 'H',
             HasUMode(target_p, UMODE_REGISTERED) ? "r" : "",
             HasUMode(target_p, UMODE_OPER) ? "*" : "", op_flags);
  else
    snprintf(status, sizeof(status), "%c%s%s%s", target_p->away[0] ? 'G' : 'H',
             HasUMode(target_p, UMODE_REGISTERED) ? "r" : "",
             HasUMode(target_p, UMODE_OPER) &&
             !HasUMode(target_p, UMODE_HIDDEN) ? "*" : "", op_flags);

  if (ConfigServerHide.hide_servers || IsHidden(target_p->servptr))
    sendto_one_numeric(source_p, &me, RPL_WHOREPLY,
               (name) ? (name) : "*",
               target_p->username, target_p->host,
               HasUMode(source_p, UMODE_OPER) ? target_p->servptr->name : "*",
               target_p->name, status,
               HasUMode(source_p, UMODE_OPER) ? target_p->hopcount : 0, target_p->info);
  else
    sendto_one_numeric(source_p, &me, RPL_WHOREPLY,
               (name) ? (name) : "*", target_p->username,
               target_p->host, target_p->servptr->name, target_p->name,
               status, target_p->hopcount, target_p->info);
}

/*!
 * \param source_p Pointer to client requesting who
 * \param target_p Pointer to client to do who on
 * \param mask Mask to match
 * \return true if mask matches, false otherwise
 */
static bool
who_matches(struct Client *source_p, struct Client *target_p, const char *mask)
{
  if (mask == NULL)
    return true;

  if (match(mask, target_p->name) == 0)
    return true;

  if (match(mask, target_p->username) == 0)
    return true;

  if (match(mask, target_p->host) == 0)
    return true;

  if (match(mask, target_p->info) == 0)
    return true;

  if (HasUMode(source_p, UMODE_OPER))
  {
    int bits = 0;
    struct irc_ssaddr addr;

    switch (parse_netmask(mask, &addr, &bits))
    {
      case HM_IPV6:
      case HM_IPV4:
        if (address_compare(&target_p->ip, &addr, false, false, bits) == true)
          return true;
    }

    if (match(mask, target_p->sockhost) == 0)
      return true;
    if (match(mask, target_p->realhost) == 0)
      return true;
  }

  if (HasUMode(source_p, UMODE_OPER) ||
      (ConfigServerHide.hide_servers == 0 && !IsHidden(target_p->servptr)))
    if (match(mask, target_p->servptr->name) == 0)
      return true;

  return false;
}

/* 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 *channel, const char *mask,
                   bool server_oper, unsigned int *maxmatches)
{
  dlink_node *node;

  DLINK_FOREACH(node, channel->members.head)
  {
    struct Client *target_p = ((struct ChannelMember *)node->data)->client;

    if (!HasUMode(target_p, UMODE_INVISIBLE) || HasFlag(target_p, FLAGS_MARK))
      continue;

    if (server_oper == true)
      if (!HasUMode(target_p, UMODE_OPER) ||
          (HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER)))
        continue;

    AddFlag(target_p, FLAGS_MARK);

    if (who_matches(source_p, target_p, mask) == true)
    {
      do_who(source_p, target_p, NULL, "");

      if (*maxmatches)
      {
        if (--(*maxmatches) == 0)
        {
          sendto_one_numeric(source_p, &me, ERR_WHOLIMEXCEED, WHO_MAX_REPLIES, "WHO");
          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, const char *mask, bool server_oper)
{
  dlink_node *node;
  unsigned int maxmatches = WHO_MAX_REPLIES;
  static uintmax_t last_used = 0;

  if (!HasUMode(source_p, UMODE_OPER))
  {
    if ((last_used + ConfigGeneral.pace_wait) > event_base->time.sec_monotonic)
    {
      sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHO");
      return;
    }

    last_used = event_base->time.sec_monotonic;
  }

  /* First, list all matching invisible clients on common channels */
  DLINK_FOREACH(node, source_p->channel.head)
  {
    struct Channel *channel = ((struct ChannelMember *)node->data)->channel;
    who_common_channel(source_p, channel, mask, server_oper, &maxmatches);
  }

  /* Second, list all matching visible clients */
  DLINK_FOREACH(node, global_client_list.head)
  {
    struct Client *target_p = node->data;

    assert(IsClient(target_p));

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

    if (server_oper == true)
      if (!HasUMode(target_p, UMODE_OPER) ||
          (HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER)))
        continue;

    if (who_matches(source_p, target_p, mask) == true)
    {
      do_who(source_p, target_p, NULL, "");

      if (maxmatches)
      {
        if (--maxmatches == 0)
        {
          sendto_one_numeric(source_p, &me, ERR_WHOLIMEXCEED, WHO_MAX_REPLIES, "WHO");
          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 *channel,
                  bool is_member, bool server_oper)
{
  dlink_node *node;

  DLINK_FOREACH(node, channel->members.head)
  {
    struct ChannelMember *member = node->data;
    struct Client *target_p = member->client;

    if (is_member == true || !HasUMode(target_p, UMODE_INVISIBLE))
    {
      if (server_oper == true)
        if (!HasUMode(target_p, UMODE_OPER) ||
            (HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER)))
          continue;
      do_who(source_p, target_p, channel->name, member_get_prefix(member, !!HasCap(source_p, CAP_MULTI_PREFIX)));
    }
  }
}

/*! \brief WHO command handler
 *
 * \param source_p Pointer to allocated Client struct from which the message
 *                 originally comes from.  This can be a local or remote client.
 * \param parc     Integer holding the number of supplied arguments.
 * \param parv     Argument vector where parv[0] .. parv[parc-1] are non-NULL
 *                 pointers.
 * \note Valid arguments for this command are:
 *      - parv[0] = command
 *      - parv[1] = nickname/channelname
 *      - parv[2] = additional selection flag, only 'o' for now
 */
static void
m_who(struct Client *source_p, int parc, char *parv[])
{
  dlink_node *node;
  struct Client *target_p = NULL;
  struct Channel *channel = NULL;
  char *mask = parv[1];
  const bool server_oper = parc > 2 && *parv[2] == 'o';  /* Show OPERS only */

  /* See if mask is there, collapse it or return if not there */
  if (EmptyString(mask))
  {
    who_global(source_p, NULL, server_oper);
    sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, "*");
    return;
  }

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

  /* '/who #some_channel' */
  if (IsChanPrefix(*mask))
  {
    /* List all users on a given channel */
    if ((channel = hash_find_channel(mask)))
    {
      if (HasUMode(source_p, UMODE_ADMIN) || member_find_link(source_p, channel))
        do_who_on_channel(source_p, channel, true, server_oper);
      else if (!SecretChannel(channel))
        do_who_on_channel(source_p, channel, false, server_oper);
    }

    sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, mask);
    return;
  }

  /* '/who nick' */
  if ((target_p = find_person(source_p, mask)) &&
      (server_oper == false || HasUMode(target_p, UMODE_OPER)))
  {
    DLINK_FOREACH(node, target_p->channel.head)
    {
      channel = ((struct ChannelMember *)node->data)->channel;
      if (PubChannel(channel) || member_find_link(source_p, channel))
        break;
    }

    if (node)
      do_who(source_p, target_p, channel->name,
             member_get_prefix(node->data, !!HasCap(source_p, CAP_MULTI_PREFIX)));
    else
      do_who(source_p, target_p, NULL, "");

    sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, mask);
    return;
  }

  /* '/who *' */
  if (strcmp(mask, "*") == 0)
  {
    if ((node = source_p->channel.head))
    {
      channel = ((struct ChannelMember *)node->data)->channel;
      do_who_on_channel(source_p, channel, true, server_oper);
    }

    sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, "*");
    return;
  }

  /* '/who 0' */
  if (strcmp(mask, "0") == 0)
    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_numeric(source_p, &me, RPL_ENDOFWHO, mask);
}

static struct Message who_msgtab =
{
  .cmd = "WHO",
  .handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
  .handlers[CLIENT_HANDLER] = { .handler = m_who },
  .handlers[SERVER_HANDLER] = { .handler = m_ignore },
  .handlers[ENCAP_HANDLER] = { .handler = m_ignore },
  .handlers[OPER_HANDLER] = { .handler = m_who }
};

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

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	9607
Committed:	Sun Sep 6 06:33:33 2020 UTC (5 years, 11 months ago) by michael
Content type:	text/x-csrc
File size:	11511 byte(s)
Log Message:	- Stylistic changes
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2020 ircd-hybrid development team
5	*
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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	* USA
20	*/
21
22	/*! \file m_who.c
23	* \brief Includes required functions for processing the WHO command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.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 "server.h"
36	#include "send.h"
37	#include "irc_string.h"
38	#include "conf.h"
39	#include "parse.h"
40	#include "modules.h"
41	#include "hostmask.h"
42
43
44	enum { WHO_MAX_REPLIES = 500 };
45
46
47	/* do_who()
48	*
49	* inputs - pointer to client requesting who
50	* - pointer to client to do who on
51	* - The reported name
52	* - channel flags
53	* output - NONE
54	* side effects - do a who on given person
55	*/
56	static void
57	do_who(struct Client source_p, const struct Client target_p,
58	const char name, const char op_flags)
59	{
60	char status[8] = ""; /* sizeof("Gr@%+") + 2 /
61
62	if (HasUMode(source_p, UMODE_OPER))
63	snprintf(status, sizeof(status), "%c%s%s%s", target_p->away[0] ? 'G' : 'H',
64	HasUMode(target_p, UMODE_REGISTERED) ? "r" : "",
65	HasUMode(target_p, UMODE_OPER) ? "*" : "", op_flags);
66	else
67	snprintf(status, sizeof(status), "%c%s%s%s", target_p->away[0] ? 'G' : 'H',
68	HasUMode(target_p, UMODE_REGISTERED) ? "r" : "",
69	HasUMode(target_p, UMODE_OPER) &&
70	!HasUMode(target_p, UMODE_HIDDEN) ? "*" : "", op_flags);
71
72	if (ConfigServerHide.hide_servers \|\| IsHidden(target_p->servptr))
73	sendto_one_numeric(source_p, &me, RPL_WHOREPLY,
74	(name) ? (name) : "*",
75	target_p->username, target_p->host,
76	HasUMode(source_p, UMODE_OPER) ? target_p->servptr->name : "*",
77	target_p->name, status,
78	HasUMode(source_p, UMODE_OPER) ? target_p->hopcount : 0, target_p->info);
79	else
80	sendto_one_numeric(source_p, &me, RPL_WHOREPLY,
81	(name) ? (name) : "*", target_p->username,
82	target_p->host, target_p->servptr->name, target_p->name,
83	status, target_p->hopcount, target_p->info);
84	}
85
86	/*!
87	* \param source_p Pointer to client requesting who
88	* \param target_p Pointer to client to do who on
89	* \param mask Mask to match
90	* \return true if mask matches, false otherwise
91	*/
92	static bool
93	who_matches(struct Client source_p, struct Client target_p, const char *mask)
94	{
95	if (mask == NULL)
96	return true;
97
98	if (match(mask, target_p->name) == 0)
99	return true;
100
101	if (match(mask, target_p->username) == 0)
102	return true;
103
104	if (match(mask, target_p->host) == 0)
105	return true;
106
107	if (match(mask, target_p->info) == 0)
108	return true;
109
110	if (HasUMode(source_p, UMODE_OPER))
111	{
112	int bits = 0;
113	struct irc_ssaddr addr;
114
115	switch (parse_netmask(mask, &addr, &bits))
116	{
117	case HM_IPV6:
118	case HM_IPV4:
119	if (address_compare(&target_p->ip, &addr, false, false, bits) == true)
120	return true;
121	}
122
123	if (match(mask, target_p->sockhost) == 0)
124	return true;
125	if (match(mask, target_p->realhost) == 0)
126	return true;
127	}
128
129	if (HasUMode(source_p, UMODE_OPER) \|\|
130	(ConfigServerHide.hide_servers == 0 && !IsHidden(target_p->servptr)))
131	if (match(mask, target_p->servptr->name) == 0)
132	return true;
133
134	return false;
135	}
136
137	/* who_common_channel
138	* inputs - pointer to client requesting who
139	* - pointer to channel member chain.
140	* - char * mask to match
141	* - int if oper on a server or not
142	* - pointer to int maxmatches
143	* output - NONE
144	* side effects - lists matching clients on specified channel,
145	* marks matched clients.
146	*
147	*/
148	static void
149	who_common_channel(struct Client source_p, struct Channel channel, const char *mask,
150	bool server_oper, unsigned int *maxmatches)
151	{
152	dlink_node *node;
153
154	DLINK_FOREACH(node, channel->members.head)
155	{
156	struct Client target_p = ((struct ChannelMember )node->data)->client;
157
158	if (!HasUMode(target_p, UMODE_INVISIBLE) \|\| HasFlag(target_p, FLAGS_MARK))
159	continue;
160
161	if (server_oper == true)
162	if (!HasUMode(target_p, UMODE_OPER) \|\|
163	(HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER)))
164	continue;
165
166	AddFlag(target_p, FLAGS_MARK);
167
168	if (who_matches(source_p, target_p, mask) == true)
169	{
170	do_who(source_p, target_p, NULL, "");
171
172	if (*maxmatches)
173	{
174	if (--(*maxmatches) == 0)
175	{
176	sendto_one_numeric(source_p, &me, ERR_WHOLIMEXCEED, WHO_MAX_REPLIES, "WHO");
177	return;
178	}
179	}
180	}
181	}
182	}
183
184	/* who_global()
185	*
186	* inputs - pointer to client requesting who
187	* - char * mask to match
188	* - int if oper on a server or not
189	* output - NONE
190	* side effects - do a global scan of all clients looking for match
191	* this is slightly expensive on EFnet ...
192	*/
193	static void
194	who_global(struct Client source_p, const char mask, bool server_oper)
195	{
196	dlink_node *node;
197	unsigned int maxmatches = WHO_MAX_REPLIES;
198	static uintmax_t last_used = 0;
199
200	if (!HasUMode(source_p, UMODE_OPER))
201	{
202	if ((last_used + ConfigGeneral.pace_wait) > event_base->time.sec_monotonic)
203	{
204	sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHO");
205	return;
206	}
207
208	last_used = event_base->time.sec_monotonic;
209	}
210
211	/* First, list all matching invisible clients on common channels */
212	DLINK_FOREACH(node, source_p->channel.head)
213	{
214	struct Channel channel = ((struct ChannelMember )node->data)->channel;
215	who_common_channel(source_p, channel, mask, server_oper, &maxmatches);
216	}
217
218	/* Second, list all matching visible clients */
219	DLINK_FOREACH(node, global_client_list.head)
220	{
221	struct Client *target_p = node->data;
222
223	assert(IsClient(target_p));
224
225	if (HasUMode(target_p, UMODE_INVISIBLE))
226	{
227	DelFlag(target_p, FLAGS_MARK);
228	continue;
229	}
230
231	if (server_oper == true)
232	if (!HasUMode(target_p, UMODE_OPER) \|\|
233	(HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER)))
234	continue;
235
236	if (who_matches(source_p, target_p, mask) == true)
237	{
238	do_who(source_p, target_p, NULL, "");
239
240	if (maxmatches)
241	{
242	if (--maxmatches == 0)
243	{
244	sendto_one_numeric(source_p, &me, ERR_WHOLIMEXCEED, WHO_MAX_REPLIES, "WHO");
245	return;
246	}
247	}
248	}
249	}
250	}
251
252	/* do_who_on_channel()
253	*
254	* inputs - pointer to client requesting who
255	* - pointer to channel to do who on
256	* - The "real name" of this channel
257	* - int if source_p is a server oper or not
258	* - int if client is member or not
259	* - int server_op flag
260	* output - NONE
261	* side effects - do a who on given channel
262	*/
263	static void
264	do_who_on_channel(struct Client source_p, struct Channel channel,
265	bool is_member, bool server_oper)
266	{
267	dlink_node *node;
268
269	DLINK_FOREACH(node, channel->members.head)
270	{
271	struct ChannelMember *member = node->data;
272	struct Client *target_p = member->client;
273
274	if (is_member == true \|\| !HasUMode(target_p, UMODE_INVISIBLE))
275	{
276	if (server_oper == true)
277	if (!HasUMode(target_p, UMODE_OPER) \|\|
278	(HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER)))
279	continue;
280	do_who(source_p, target_p, channel->name, member_get_prefix(member, !!HasCap(source_p, CAP_MULTI_PREFIX)));
281	}
282	}
283	}
284
285	/*! \brief WHO command handler
286	*
287	* \param source_p Pointer to allocated Client struct from which the message
288	* originally comes from. This can be a local or remote client.
289	* \param parc Integer holding the number of supplied arguments.
290	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
291	* pointers.
292	* \note Valid arguments for this command are:
293	* - parv[0] = command
294	* - parv[1] = nickname/channelname
295	* - parv[2] = additional selection flag, only 'o' for now
296	*/
297	static void
298	m_who(struct Client source_p, int parc, char parv[])
299	{
300	dlink_node *node;
301	struct Client *target_p = NULL;
302	struct Channel *channel = NULL;
303	char *mask = parv[1];
304	const bool server_oper = parc > 2 && parv[2] == 'o'; / Show OPERS only */
305
306	/* See if mask is there, collapse it or return if not there */
307	if (EmptyString(mask))
308	{
309	who_global(source_p, NULL, server_oper);
310	sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, "*");
311	return;
312	}
313
314	/* Mask isn't NULL at this point. repeat after me... -db */
315	collapse(mask);
316
317	/* '/who #some_channel' */
318	if (IsChanPrefix(*mask))
319	{
320	/* List all users on a given channel */
321	if ((channel = hash_find_channel(mask)))
322	{
323	if (HasUMode(source_p, UMODE_ADMIN) \|\| member_find_link(source_p, channel))
324	do_who_on_channel(source_p, channel, true, server_oper);
325	else if (!SecretChannel(channel))
326	do_who_on_channel(source_p, channel, false, server_oper);
327	}
328
329	sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, mask);
330	return;
331	}
332
333	/* '/who nick' */
334	if ((target_p = find_person(source_p, mask)) &&
335	(server_oper == false \|\| HasUMode(target_p, UMODE_OPER)))
336	{
337	DLINK_FOREACH(node, target_p->channel.head)
338	{
339	channel = ((struct ChannelMember *)node->data)->channel;
340	if (PubChannel(channel) \|\| member_find_link(source_p, channel))
341	break;
342	}
343
344	if (node)
345	do_who(source_p, target_p, channel->name,
346	member_get_prefix(node->data, !!HasCap(source_p, CAP_MULTI_PREFIX)));
347	else
348	do_who(source_p, target_p, NULL, "");
349
350	sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, mask);
351	return;
352	}
353
354	/* '/who ' /
355	if (strcmp(mask, "*") == 0)
356	{
357	if ((node = source_p->channel.head))
358	{
359	channel = ((struct ChannelMember *)node->data)->channel;
360	do_who_on_channel(source_p, channel, true, server_oper);
361	}
362
363	sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, "*");
364	return;
365	}
366
367	/* '/who 0' */
368	if (strcmp(mask, "0") == 0)
369	who_global(source_p, NULL, server_oper);
370	else
371	who_global(source_p, mask, server_oper);
372
373	/* Wasn't a nick, wasn't a channel, wasn't a '' so ... /
374	sendto_one_numeric(source_p, &me, RPL_ENDOFWHO, mask);
375	}
376
377	static struct Message who_msgtab =
378	{
379	.cmd = "WHO",
380	.handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
381	.handlers[CLIENT_HANDLER] = { .handler = m_who },
382	.handlers[SERVER_HANDLER] = { .handler = m_ignore },
383	.handlers[ENCAP_HANDLER] = { .handler = m_ignore },
384	.handlers[OPER_HANDLER] = { .handler = m_who }
385	};
386
387	static void
388	module_init(void)
389	{
390	mod_add_cmd(&who_msgtab);
391	}
392
393	static void
394	module_exit(void)
395	{
396	mod_del_cmd(&who_msgtab);
397	}
398
399	struct module module_entry =
400	{
401	.version = "$Revision$",
402	.modinit = module_init,
403	.modexit = module_exit,
404	};