trunk/modules/m_whowas.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2015 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_whowas.c
 * \brief Includes required functions for processing the WHOWAS command.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "whowas.h"
#include "client.h"
#include "hash.h"
#include "irc_string.h"
#include "ircd.h"
#include "ircd_defs.h"
#include "numeric.h"
#include "misc.h"
#include "server.h"
#include "send.h"
#include "conf.h"
#include "parse.h"
#include "modules.h"


#define WHOWAS_MAX_REPLIES 20  /* Does only apply to remote clients */

static void
do_whowas(struct Client *source_p, const int parc, char *parv[])
{
  int cur = 0;
  int max = -1;
  const dlink_node *node = NULL;

  if (parc > 2 && !EmptyString(parv[2]))
    max = atoi(parv[2]);

  if (!MyConnect(source_p) && (max <= 0 || max > WHOWAS_MAX_REPLIES))
    max = WHOWAS_MAX_REPLIES;

  DLINK_FOREACH(node, WHOWASHASH[strhash(parv[1])].head)
  {
    const struct Whowas *temp = node->data;

    if (!irccmp(parv[1], temp->name))
    {
      sendto_one_numeric(source_p, &me, RPL_WHOWASUSER, temp->name,
                         temp->username, temp->hostname,
                         temp->realname);

      if (HasUMode(source_p, UMODE_OPER))
        if (strcmp(temp->sockhost, "0"))  /* XXX: TBR */
          sendto_one_numeric(source_p, &me, RPL_WHOISACTUALLY, temp->name,
                             temp->username, temp->hostname,
                             temp->sockhost);

      if (!IsDigit(temp->account[0]) && temp->account[0] != '*')
        sendto_one_numeric(source_p, &me, RPL_WHOISACCOUNT, temp->name, temp->account, "was");

      if ((temp->shide || ConfigServerHide.hide_servers) && !HasUMode(source_p, UMODE_OPER))
        sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, temp->name,
                           ConfigServerInfo.network_name, myctime(temp->logoff));
      else
        sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, temp->name,
                           temp->servername, myctime(temp->logoff));
      ++cur;
    }

    if (max > 0 && cur >= max)
      break;
  }

  if (!cur)
    sendto_one_numeric(source_p, &me, ERR_WASNOSUCHNICK, parv[1]);

  sendto_one_numeric(source_p, &me, RPL_ENDOFWHOWAS, parv[1]);
}

/*! \brief WHOWAS 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
 *      - parv[2] = count
 *      - parv[3] = nickname/servername
 */
static int
m_whowas(struct Client *source_p, int parc, char *parv[])
{
  static time_t last_used = 0;

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

  if ((last_used + ConfigGeneral.pace_wait) > CurrentTime)
  {
    sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHOWAS");
    return 0;
  }

  last_used = CurrentTime;

  if (!ConfigServerHide.disable_remote_commands)
    if (hunt_server(source_p, ":%s WHOWAS %s %s :%s", 3, parc, parv) != HUNTED_ISME)
      return 0;

  do_whowas(source_p, parc, parv);
  return 0;
}

/*! \brief WHOWAS 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
 *      - parv[2] = count
 *      - parv[3] = nickname/servername
 */
static int
ms_whowas(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 (hunt_server(source_p, ":%s WHOWAS %s %s :%s", 3, parc, parv) != HUNTED_ISME)
    return 0;

  do_whowas(source_p, parc, parv);
  return 0;
}

static struct Message whowas_msgtab =
{
  "WHOWAS", NULL, 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
  { m_unregistered, m_whowas, ms_whowas, m_ignore, ms_whowas, m_ignore }
};

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

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

struct module module_entry =
{
  .node    = { NULL, NULL, NULL },
  .name    = NULL,
  .version = "$Revision$",
  .handle  = NULL,
  .modinit = module_init,
  .modexit = module_exit,
  .flags   = 0
};
Revision:	5638
Committed:	Sun Mar 1 15:33:06 2015 UTC (11 years, 4 months ago) by michael
Content type:	text/x-csrc
File size:	5581 byte(s)
Log Message:	- Fixed bug that would allow remote clients to bypass the hard limit of max WHOWAS entries to be returned
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	5347	* Copyright (c) 1997-2015 ircd-hybrid development team
5	adx	30	*
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	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
19	adx	30	* USA
20			*/
21
22	michael	2820	/*! \file m_whowas.c
23			* \brief Includes required functions for processing the WHOWAS command.
24			* \version $Id$
25			*/
26
27	adx	30	#include "stdinc.h"
28	michael	1358	#include "list.h"
29	adx	30	#include "whowas.h"
30			#include "client.h"
31			#include "hash.h"
32			#include "irc_string.h"
33			#include "ircd.h"
34			#include "ircd_defs.h"
35			#include "numeric.h"
36	michael	3347	#include "misc.h"
37			#include "server.h"
38	adx	30	#include "send.h"
39	michael	1309	#include "conf.h"
40	adx	30	#include "parse.h"
41			#include "modules.h"
42
43
44	michael	5638	#define WHOWAS_MAX_REPLIES 20 /* Does only apply to remote clients */
45
46	adx	30	static void
47	michael	3338	do_whowas(struct Client source_p, const int parc, char parv[])
48	adx	30	{
49			int cur = 0;
50			int max = -1;
51	michael	4815	const dlink_node *node = NULL;
52	adx	30
53	michael	2076	if (parc > 2 && !EmptyString(parv[2]))
54	michael	5638	max = atoi(parv[2]);
55	adx	30
56	michael	5638	if (!MyConnect(source_p) && (max <= 0 \|\| max > WHOWAS_MAX_REPLIES))
57			max = WHOWAS_MAX_REPLIES;
58
59	michael	4815	DLINK_FOREACH(node, WHOWASHASH[strhash(parv[1])].head)
60	michael	1358	{
61	michael	4815	const struct Whowas *temp = node->data;
62	adx	30
63	michael	2076	if (!irccmp(parv[1], temp->name))
64	adx	30	{
65	michael	3109	sendto_one_numeric(source_p, &me, RPL_WHOWASUSER, temp->name,
66			temp->username, temp->hostname,
67			temp->realname);
68	adx	30
69	michael	5631	if (HasUMode(source_p, UMODE_OPER))
70			if (strcmp(temp->sockhost, "0")) /* XXX: TBR */
71			sendto_one_numeric(source_p, &me, RPL_WHOISACTUALLY, temp->name,
72			temp->username, temp->hostname,
73			temp->sockhost);
74
75	michael	4819	if (!IsDigit(temp->account[0]) && temp->account[0] != '*')
76			sendto_one_numeric(source_p, &me, RPL_WHOISACCOUNT, temp->name, temp->account, "was");
77	michael	4767
78	michael	2748	if ((temp->shide \|\| ConfigServerHide.hide_servers) && !HasUMode(source_p, UMODE_OPER))
79	michael	3109	sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, temp->name,
80	michael	4340	ConfigServerInfo.network_name, myctime(temp->logoff));
81	adx	30	else
82	michael	3109	sendto_one_numeric(source_p, &me, RPL_WHOISSERVER, temp->name,
83			temp->servername, myctime(temp->logoff));
84	michael	1358	++cur;
85	adx	30	}
86
87			if (max > 0 && cur >= max)
88			break;
89			}
90
91			if (!cur)
92	michael	3109	sendto_one_numeric(source_p, &me, ERR_WASNOSUCHNICK, parv[1]);
93	adx	30
94	michael	3109	sendto_one_numeric(source_p, &me, RPL_ENDOFWHOWAS, parv[1]);
95	adx	30	}
96	michael	1230
97	michael	3295	/*! \brief WHOWAS command handler
98			*
99			* \param source_p Pointer to allocated Client struct from which the message
100			* originally comes from. This can be a local or remote client.
101			* \param parc Integer holding the number of supplied arguments.
102			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
103			* pointers.
104			* \note Valid arguments for this command are:
105			* - parv[0] = command
106			* - parv[1] = nickname
107			* - parv[2] = count
108			* - parv[3] = nickname/servername
109			*/
110	michael	2820	static int
111	michael	3156	m_whowas(struct Client source_p, int parc, char parv[])
112	michael	1230	{
113			static time_t last_used = 0;
114
115			if (parc < 2 \|\| EmptyString(parv[1]))
116			{
117	michael	3109	sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
118	michael	2820	return 0;
119	michael	1230	}
120
121	michael	4340	if ((last_used + ConfigGeneral.pace_wait) > CurrentTime)
122	michael	1230	{
123	michael	4759	sendto_one_numeric(source_p, &me, RPL_LOAD2HI, "WHOWAS");
124	michael	2820	return 0;
125	michael	1230	}
126
127			last_used = CurrentTime;
128
129	michael	4720	if (!ConfigServerHide.disable_remote_commands)
130			if (hunt_server(source_p, ":%s WHOWAS %s %s :%s", 3, parc, parv) != HUNTED_ISME)
131	michael	2986	return 0;
132
133	michael	3338	do_whowas(source_p, parc, parv);
134	michael	2820	return 0;
135	michael	1230	}
136
137	michael	3295	/*! \brief WHOWAS command handler
138			*
139			* \param source_p Pointer to allocated Client struct from which the message
140			* originally comes from. This can be a local or remote client.
141			* \param parc Integer holding the number of supplied arguments.
142			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
143			* pointers.
144			* \note Valid arguments for this command are:
145			* - parv[0] = command
146			* - parv[1] = nickname
147			* - parv[2] = count
148			* - parv[3] = nickname/servername
149			*/
150	michael	2820	static int
151	michael	3346	ms_whowas(struct Client source_p, int parc, char parv[])
152	michael	1230	{
153			if (parc < 2 \|\| EmptyString(parv[1]))
154			{
155	michael	3109	sendto_one_numeric(source_p, &me, ERR_NONICKNAMEGIVEN);
156	michael	2820	return 0;
157	michael	1230	}
158
159	michael	4720	if (hunt_server(source_p, ":%s WHOWAS %s %s :%s", 3, parc, parv) != HUNTED_ISME)
160			return 0;
161	michael	2986
162	michael	3338	do_whowas(source_p, parc, parv);
163	michael	2820	return 0;
164	michael	1230	}
165
166	michael	2820	static struct Message whowas_msgtab =
167			{
168	michael	4545	"WHOWAS", NULL, 0, 0, 0, MAXPARA, MFLG_SLOW, 0,
169	michael	3346	{ m_unregistered, m_whowas, ms_whowas, m_ignore, ms_whowas, m_ignore }
170	michael	1230	};
171
172			static void
173			module_init(void)
174			{
175			mod_add_cmd(&whowas_msgtab);
176			}
177
178			static void
179			module_exit(void)
180			{
181			mod_del_cmd(&whowas_msgtab);
182			}
183
184	michael	2820	struct module module_entry =
185			{
186	michael	1230	.node = { NULL, NULL, NULL },
187			.name = NULL,
188			.version = "$Revision$",
189			.handle = NULL,
190			.modinit = module_init,
191			.modexit = module_exit,
192			.flags = 0
193			};