trunk/modules/m_whois.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2017 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_whois.c
 * \brief Includes required functions for processing the WHOIS command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "client.h"
#include "hash.h"
#include "channel.h"
#include "channel_mode.h"
#include "ircd.h"
#include "numeric.h"
#include "conf.h"
#include "misc.h"
#include "server.h"
#include "user.h"
#include "send.h"
#include "irc_string.h"
#include "parse.h"
#include "modules.h"


static int
whois_can_see_channels(struct Channel *chptr,
                       struct Client *source_p,
                       struct Client *target_p)
{
  if (PubChannel(chptr) && !HasUMode(target_p, UMODE_HIDECHANS))
    return 1;

  if (source_p == target_p || IsMember(source_p, chptr))
    return 1;

  if (HasUMode(source_p, UMODE_OPER))
    return 2;
  return 0;
}

/* whois_person()
 *
 * inputs       - source_p client to report to
 *              - target_p client to report on
 * output       - NONE
 * side effects - 
 */
static void
whois_person(struct Client *source_p, struct Client *target_p)
{
  char buf[IRCD_BUFSIZE] = "";
  dlink_node *node;
  const struct ServicesTag *svstag = NULL;
  char *t = NULL;
  int cur_len = 0;
  int mlen = 0;
  int tlen = 0;
  int reply_to_send = 0;

  sendto_one_numeric(source_p, &me, RPL_WHOISUSER, target_p->name,
                     target_p->username, target_p->host,
                     target_p->info);

  cur_len = mlen = snprintf(buf, sizeof(buf), numeric_form(RPL_WHOISCHANNELS),
                            me.name, source_p->name, target_p->name, "");
  t = buf + mlen;

  DLINK_FOREACH(node, target_p->channel.head)
  {
    const struct Membership *member = node->data;
    int show = whois_can_see_channels(member->chptr, source_p, target_p);

    if (show)
    {
      if ((cur_len + 4 + member->chptr->name_len + 1) > (IRCD_BUFSIZE - 2))
      {
        *(t - 1) = '\0';
        sendto_one(source_p, "%s", buf);
        cur_len = mlen;
        t = buf + mlen;
      }

      tlen = sprintf(t, "%s%s%s ", show == 2 ? "~" : "", get_member_status(member, 1),
                     member->chptr->name);
      t += tlen;
      cur_len += tlen;
      reply_to_send = 1;
    }
  }

  if (reply_to_send)
  {
    *(t - 1) = '\0';
    sendto_one(source_p, "%s", buf);
  }

  if ((ConfigServerHide.hide_servers || IsHidden(target_p->servptr)) &&
      !(HasUMode(source_p, UMODE_OPER) || source_p == target_p))
    sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, target_p->name,
                       ConfigServerHide.hidden_name,
                       ConfigServerInfo.network_desc);
  else
    sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, target_p->name,
                       target_p->servptr->name, target_p->servptr->info);

  if (HasUMode(target_p, UMODE_REGISTERED))
    sendto_one_numeric(source_p, &me, RPL_WHOISREGNICK, target_p->name);

  if (strcmp(target_p->account, "*"))
    sendto_one_numeric(source_p, &me, RPL_WHOISACCOUNT, target_p->name,
                       target_p->account, "is");

  if (target_p->away[0])
    sendto_one_numeric(source_p, &me, RPL_AWAY, target_p->name,
                       target_p->away);

  if (HasUMode(target_p, UMODE_CALLERID | UMODE_SOFTCALLERID))
  {
    const int callerid = !!HasUMode(target_p, UMODE_CALLERID);

    sendto_one_numeric(source_p, &me, RPL_TARGUMODEG, target_p->name,
                       callerid ? "+g" : "+G",
                       callerid ? "server side ignore" :
                                  "server side ignore with the exception of common channels");
  }

  if (target_p->svstags.head)
    svstag = target_p->svstags.head->data;

  if (HasUMode(target_p, UMODE_OPER))
    if (!HasUMode(target_p, UMODE_HIDDEN) || HasUMode(source_p, UMODE_OPER))
      if (!svstag || svstag->numeric != RPL_WHOISOPERATOR)
        sendto_one_numeric(source_p, &me, RPL_WHOISOPERATOR, target_p->name,
                   HasUMode(target_p, UMODE_ADMIN) ? "is a Server Administrator" :
                                                   "is an IRC Operator");

  DLINK_FOREACH(node, target_p->svstags.head)
  {
    svstag = node->data;

    if (svstag->numeric == RPL_WHOISOPERATOR)
      if (HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER))
        continue;

    if (!svstag->umodes || HasUMode(source_p, svstag->umodes))
      sendto_one_numeric(source_p, &me, svstag->numeric | SND_EXPLICIT, "%s :%s",
                         target_p->name, svstag->tag);
  }

  if (HasUMode(target_p, UMODE_WEBIRC))
    sendto_one_numeric(source_p, &me, RPL_WHOISTEXT, target_p->name,
                       "User connected using a webirc gateway");

  if (HasUMode(source_p, UMODE_OPER) || source_p == target_p)
  {
    char *m = buf;
    *m++ = '+';

    for (const struct user_modes *tab = umode_tab; tab->c; ++tab)
      if (HasUMode(target_p, tab->flag))
        *m++ = tab->c;
    *m = '\0';

    sendto_one_numeric(source_p, &me, RPL_WHOISMODES, target_p->name, buf);
  }

  if (HasUMode(source_p, UMODE_OPER) || source_p == target_p)
    sendto_one_numeric(source_p, &me, RPL_WHOISACTUALLY, target_p->name,
                       target_p->username, target_p->realhost,
                       target_p->sockhost);

  if (HasUMode(target_p, UMODE_SSL))
    sendto_one_numeric(source_p, &me, RPL_WHOISSECURE, target_p->name);

  if (!EmptyString(target_p->certfp))
    if (target_p == source_p || HasUMode(source_p, UMODE_OPER))
      sendto_one_numeric(source_p, &me, RPL_WHOISCERTFP, target_p->name, target_p->certfp);

  if (MyConnect(target_p))
    if (!HasUMode(target_p, UMODE_HIDEIDLE) || HasUMode(source_p, UMODE_OPER) ||
        source_p == target_p)
      sendto_one_numeric(source_p, &me, RPL_WHOISIDLE, target_p->name,
                         client_get_idle_time(source_p, target_p),
                         target_p->connection->firsttime);

  if (HasUMode(target_p, UMODE_SPY) && source_p != target_p)
    sendto_one_notice(target_p, &me, ":*** Notice -- %s (%s@%s) [%s] is doing a /whois on you",
                      source_p->name, source_p->username, source_p->host, source_p->servptr->name);
}

/* do_whois()
 *
 * inputs       - pointer to /whois source
 *              - number of parameters
 *              - pointer to parameters array
 * output       - pointer to void
 * side effects - Does whois
 */
static void
do_whois(struct Client *source_p, const char *name)
{
  struct Client *target_p = NULL;

  if ((target_p = hash_find_client(name)) && IsClient(target_p))
    whois_person(source_p, target_p);
  else
    sendto_one_numeric(source_p, &me, ERR_NOSUCHNICK, name);

  sendto_one_numeric(source_p, &me, RPL_ENDOFWHOIS, name);
}

/*! \brief WHOIS 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/servername
 *      - parv[2] = nickname
 */
static int
m_whois(struct Client *source_p, int parc, char *parv[])
{
  static uintmax_t last_used = 0;

  if (parc < 2 || EmptyString(parv[1]))
  {
    sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
    return 0;
  }

  if (parc > 2 && !EmptyString(parv[2]))
  {
    /* seeing as this is going across servers, we should limit it */
    if ((last_used + ConfigGeneral.pace_wait_simple) > CurrentTime)
    {
      sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHOIS");
      return 0;
    }

    last_used = CurrentTime;

    /*
     * if we have serverhide enabled, they can either ask the clients
     * server, or our server.. I don't see why they would need to ask
     * anything else for info about the client.. --fl_
     */
    if (ConfigServerHide.disable_remote_commands)
      parv[1] = parv[2];

    if (server_hunt(source_p, ":%s WHOIS %s :%s", 1, parc, parv)->ret != HUNTED_ISME)
      return 0;

    parv[1] = parv[2];
  }

  do_whois(source_p, parv[1]);
  return 0;
}

/*! \brief WHOIS 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/servername
 *      - parv[2] = nickname
 */
static int
mo_whois(struct Client *source_p, int parc, char *parv[])
{
  if (parc < 2 || EmptyString(parv[1]))
  {
    sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
    return 0;
  }

  if (parc > 2 && !EmptyString(parv[2]))
  {
    if (server_hunt(source_p, ":%s WHOIS %s :%s", 1, parc, parv)->ret != HUNTED_ISME)
      return 0;

    parv[1] = parv[2];
  }

  do_whois(source_p, parv[1]);
  return 0;
}

static struct Message whois_msgtab =
{
  .cmd = "WHOIS",
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_whois,
  .handlers[SERVER_HANDLER] = mo_whois,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = mo_whois
};

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

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	8214
Committed:	Sun Apr 16 11:44:44 2017 UTC (9 years, 5 months ago) by michael
Content type:	text/x-csrc
File size:	10486 byte(s)
Log Message:	- Store real host information in Client.realhost and extend the UID message to send the actual host. This allows operators to see the real host of a client in /whois and /whowas.
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2017 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_whois.c
23	* \brief Includes required functions for processing the WHOIS command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "client.h"
30	#include "hash.h"
31	#include "channel.h"
32	#include "channel_mode.h"
33	#include "ircd.h"
34	#include "numeric.h"
35	#include "conf.h"
36	#include "misc.h"
37	#include "server.h"
38	#include "user.h"
39	#include "send.h"
40	#include "irc_string.h"
41	#include "parse.h"
42	#include "modules.h"
43
44
45	static int
46	whois_can_see_channels(struct Channel *chptr,
47	struct Client *source_p,
48	struct Client *target_p)
49	{
50	if (PubChannel(chptr) && !HasUMode(target_p, UMODE_HIDECHANS))
51	return 1;
52
53	if (source_p == target_p \|\| IsMember(source_p, chptr))
54	return 1;
55
56	if (HasUMode(source_p, UMODE_OPER))
57	return 2;
58	return 0;
59	}
60
61	/* whois_person()
62	*
63	* inputs - source_p client to report to
64	* - target_p client to report on
65	* output - NONE
66	* side effects -
67	*/
68	static void
69	whois_person(struct Client source_p, struct Client target_p)
70	{
71	char buf[IRCD_BUFSIZE] = "";
72	dlink_node *node;
73	const struct ServicesTag *svstag = NULL;
74	char *t = NULL;
75	int cur_len = 0;
76	int mlen = 0;
77	int tlen = 0;
78	int reply_to_send = 0;
79
80	sendto_one_numeric(source_p, &me, RPL_WHOISUSER, target_p->name,
81	target_p->username, target_p->host,
82	target_p->info);
83
84	cur_len = mlen = snprintf(buf, sizeof(buf), numeric_form(RPL_WHOISCHANNELS),
85	me.name, source_p->name, target_p->name, "");
86	t = buf + mlen;
87
88	DLINK_FOREACH(node, target_p->channel.head)
89	{
90	const struct Membership *member = node->data;
91	int show = whois_can_see_channels(member->chptr, source_p, target_p);
92
93	if (show)
94	{
95	if ((cur_len + 4 + member->chptr->name_len + 1) > (IRCD_BUFSIZE - 2))
96	{
97	*(t - 1) = '\0';
98	sendto_one(source_p, "%s", buf);
99	cur_len = mlen;
100	t = buf + mlen;
101	}
102
103	tlen = sprintf(t, "%s%s%s ", show == 2 ? "~" : "", get_member_status(member, 1),
104	member->chptr->name);
105	t += tlen;
106	cur_len += tlen;
107	reply_to_send = 1;
108	}
109	}
110
111	if (reply_to_send)
112	{
113	*(t - 1) = '\0';
114	sendto_one(source_p, "%s", buf);
115	}
116
117	if ((ConfigServerHide.hide_servers \|\| IsHidden(target_p->servptr)) &&
118	!(HasUMode(source_p, UMODE_OPER) \|\| source_p == target_p))
119	sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, target_p->name,
120	ConfigServerHide.hidden_name,
121	ConfigServerInfo.network_desc);
122	else
123	sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, target_p->name,
124	target_p->servptr->name, target_p->servptr->info);
125
126	if (HasUMode(target_p, UMODE_REGISTERED))
127	sendto_one_numeric(source_p, &me, RPL_WHOISREGNICK, target_p->name);
128
129	if (strcmp(target_p->account, "*"))
130	sendto_one_numeric(source_p, &me, RPL_WHOISACCOUNT, target_p->name,
131	target_p->account, "is");
132
133	if (target_p->away[0])
134	sendto_one_numeric(source_p, &me, RPL_AWAY, target_p->name,
135	target_p->away);
136
137	if (HasUMode(target_p, UMODE_CALLERID \| UMODE_SOFTCALLERID))
138	{
139	const int callerid = !!HasUMode(target_p, UMODE_CALLERID);
140
141	sendto_one_numeric(source_p, &me, RPL_TARGUMODEG, target_p->name,
142	callerid ? "+g" : "+G",
143	callerid ? "server side ignore" :
144	"server side ignore with the exception of common channels");
145	}
146
147	if (target_p->svstags.head)
148	svstag = target_p->svstags.head->data;
149
150	if (HasUMode(target_p, UMODE_OPER))
151	if (!HasUMode(target_p, UMODE_HIDDEN) \|\| HasUMode(source_p, UMODE_OPER))
152	if (!svstag \|\| svstag->numeric != RPL_WHOISOPERATOR)
153	sendto_one_numeric(source_p, &me, RPL_WHOISOPERATOR, target_p->name,
154	HasUMode(target_p, UMODE_ADMIN) ? "is a Server Administrator" :
155	"is an IRC Operator");
156
157	DLINK_FOREACH(node, target_p->svstags.head)
158	{
159	svstag = node->data;
160
161	if (svstag->numeric == RPL_WHOISOPERATOR)
162	if (HasUMode(target_p, UMODE_HIDDEN) && !HasUMode(source_p, UMODE_OPER))
163	continue;
164
165	if (!svstag->umodes \|\| HasUMode(source_p, svstag->umodes))
166	sendto_one_numeric(source_p, &me, svstag->numeric \| SND_EXPLICIT, "%s :%s",
167	target_p->name, svstag->tag);
168	}
169
170	if (HasUMode(target_p, UMODE_WEBIRC))
171	sendto_one_numeric(source_p, &me, RPL_WHOISTEXT, target_p->name,
172	"User connected using a webirc gateway");
173
174	if (HasUMode(source_p, UMODE_OPER) \|\| source_p == target_p)
175	{
176	char *m = buf;
177	*m++ = '+';
178
179	for (const struct user_modes *tab = umode_tab; tab->c; ++tab)
180	if (HasUMode(target_p, tab->flag))
181	*m++ = tab->c;
182	*m = '\0';
183
184	sendto_one_numeric(source_p, &me, RPL_WHOISMODES, target_p->name, buf);
185	}
186
187	if (HasUMode(source_p, UMODE_OPER) \|\| source_p == target_p)
188	sendto_one_numeric(source_p, &me, RPL_WHOISACTUALLY, target_p->name,
189	target_p->username, target_p->realhost,
190	target_p->sockhost);
191
192	if (HasUMode(target_p, UMODE_SSL))
193	sendto_one_numeric(source_p, &me, RPL_WHOISSECURE, target_p->name);
194
195	if (!EmptyString(target_p->certfp))
196	if (target_p == source_p \|\| HasUMode(source_p, UMODE_OPER))
197	sendto_one_numeric(source_p, &me, RPL_WHOISCERTFP, target_p->name, target_p->certfp);
198
199	if (MyConnect(target_p))
200	if (!HasUMode(target_p, UMODE_HIDEIDLE) \|\| HasUMode(source_p, UMODE_OPER) \|\|
201	source_p == target_p)
202	sendto_one_numeric(source_p, &me, RPL_WHOISIDLE, target_p->name,
203	client_get_idle_time(source_p, target_p),
204	target_p->connection->firsttime);
205
206	if (HasUMode(target_p, UMODE_SPY) && source_p != target_p)
207	sendto_one_notice(target_p, &me, ":*** Notice -- %s (%s@%s) [%s] is doing a /whois on you",
208	source_p->name, source_p->username, source_p->host, source_p->servptr->name);
209	}
210
211	/* do_whois()
212	*
213	* inputs - pointer to /whois source
214	* - number of parameters
215	* - pointer to parameters array
216	* output - pointer to void
217	* side effects - Does whois
218	*/
219	static void
220	do_whois(struct Client source_p, const char name)
221	{
222	struct Client *target_p = NULL;
223
224	if ((target_p = hash_find_client(name)) && IsClient(target_p))
225	whois_person(source_p, target_p);
226	else
227	sendto_one_numeric(source_p, &me, ERR_NOSUCHNICK, name);
228
229	sendto_one_numeric(source_p, &me, RPL_ENDOFWHOIS, name);
230	}
231
232	/*! \brief WHOIS command handler
233	*
234	* \param source_p Pointer to allocated Client struct from which the message
235	* originally comes from. This can be a local or remote client.
236	* \param parc Integer holding the number of supplied arguments.
237	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
238	* pointers.
239	* \note Valid arguments for this command are:
240	* - parv[0] = command
241	* - parv[1] = nickname/servername
242	* - parv[2] = nickname
243	*/
244	static int
245	m_whois(struct Client source_p, int parc, char parv[])
246	{
247	static uintmax_t last_used = 0;
248
249	if (parc < 2 \|\| EmptyString(parv[1]))
250	{
251	sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
252	return 0;
253	}
254
255	if (parc > 2 && !EmptyString(parv[2]))
256	{
257	/* seeing as this is going across servers, we should limit it */
258	if ((last_used + ConfigGeneral.pace_wait_simple) > CurrentTime)
259	{
260	sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHOIS");
261	return 0;
262	}
263
264	last_used = CurrentTime;
265
266	/*
267	* if we have serverhide enabled, they can either ask the clients
268	* server, or our server.. I don't see why they would need to ask
269	* anything else for info about the client.. --fl_
270	*/
271	if (ConfigServerHide.disable_remote_commands)
272	parv[1] = parv[2];
273
274	if (server_hunt(source_p, ":%s WHOIS %s :%s", 1, parc, parv)->ret != HUNTED_ISME)
275	return 0;
276
277	parv[1] = parv[2];
278	}
279
280	do_whois(source_p, parv[1]);
281	return 0;
282	}
283
284	/*! \brief WHOIS command handler
285	*
286	* \param source_p Pointer to allocated Client struct from which the message
287	* originally comes from. This can be a local or remote client.
288	* \param parc Integer holding the number of supplied arguments.
289	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
290	* pointers.
291	* \note Valid arguments for this command are:
292	* - parv[0] = command
293	* - parv[1] = nickname/servername
294	* - parv[2] = nickname
295	*/
296	static int
297	mo_whois(struct Client source_p, int parc, char parv[])
298	{
299	if (parc < 2 \|\| EmptyString(parv[1]))
300	{
301	sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
302	return 0;
303	}
304
305	if (parc > 2 && !EmptyString(parv[2]))
306	{
307	if (server_hunt(source_p, ":%s WHOIS %s :%s", 1, parc, parv)->ret != HUNTED_ISME)
308	return 0;
309
310	parv[1] = parv[2];
311	}
312
313	do_whois(source_p, parv[1]);
314	return 0;
315	}
316
317	static struct Message whois_msgtab =
318	{
319	.cmd = "WHOIS",
320	.args_max = MAXPARA,
321	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
322	.handlers[CLIENT_HANDLER] = m_whois,
323	.handlers[SERVER_HANDLER] = mo_whois,
324	.handlers[ENCAP_HANDLER] = m_ignore,
325	.handlers[OPER_HANDLER] = mo_whois
326	};
327
328	static void
329	module_init(void)
330	{
331	mod_add_cmd(&whois_msgtab);
332	}
333
334	static void
335	module_exit(void)
336	{
337	mod_del_cmd(&whois_msgtab);
338	}
339
340	struct module module_entry =
341	{
342	.version = "$Revision$",
343	.modinit = module_init,
344	.modexit = module_exit,
345	};