trunk/modules/m_svsnick.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1999 Bahamut development team.
 *  Copyright (c) 2011-2018 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_svsnick.c
 * \brief Includes required functions for processing the SVSNICK command.
 * \version $Id$
 */


#include "stdinc.h"
#include "client.h"
#include "ircd.h"
#include "channel_mode.h"
#include "send.h"
#include "parse.h"
#include "modules.h"
#include "irc_string.h"
#include "user.h"
#include "hash.h"
#include "watch.h"
#include "whowas.h"


/*! \brief SVSNICK 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] = old nickname
 *      - parv[2] = old timestamp
 *      - parv[3] = new nickname
 *      - parv[4] = new timestamp
 */
static int
ms_svsnick(struct Client *source_p, int parc, char *parv[])
{
  struct Client *target_p = NULL, *exists_p = NULL;
  const char *new_nick = parc == 5 ? parv[3] : parv[2];  /* TBR: compatibility mode */
  uintmax_t ts = 0, new_ts = 0;

  if (!HasFlag(source_p, FLAGS_SERVICE))
    return 0;

  if (valid_nickname(new_nick, true) == false)
    return 0;

  if ((target_p = find_person(source_p, parv[1])) == NULL)
    return 0;

  if (parc == 5)  /* TBR: compatibility mode */
  {
    ts = strtoumax(parv[2], NULL, 10);
    if (ts && (ts != target_p->tsinfo))
      return 0;
  }
  else  /* parc == 4 */
    ts = strtoumax(parv[3], NULL, 10);

  if (parc == 4)  /* TBR: compatibility mode */
    new_ts = ts;
  else
    new_ts = strtoumax(parv[4], NULL, 10);

  if (!MyConnect(target_p))
  {
    if (target_p->from == source_p->from)
    {
      sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
                           "Received wrong-direction SVSNICK "
                           "for %s (behind %s) from %s",
                           target_p->name, source_p->from->name,
                           client_get_name(source_p, HIDE_IP));
      return 0;
    }

    sendto_one(target_p, ":%s SVSNICK %s %s %s", source_p->id,
               target_p->id, new_nick, parv[3]);
    return 0;
  }

  if ((exists_p = hash_find_client(new_nick)))
  {
    if (target_p == exists_p)
    {
      if (strcmp(target_p->name, new_nick) == 0)
        return 0;
    }
    else if (IsUnknown(exists_p))
      exit_client(exists_p, "SVSNICK Override");
    else
    {
      exit_client(target_p, "SVSNICK Collide");
      return 0;
    }
  }

  target_p->tsinfo = new_ts;
  clear_ban_cache_list(&target_p->channel);
  watch_check_hash(target_p, RPL_LOGOFF);

  if (HasUMode(target_p, UMODE_REGISTERED))
  {
    const unsigned int oldmodes = target_p->umodes;
    char modebuf[IRCD_BUFSIZE] = "";

    DelUMode(target_p, UMODE_REGISTERED);
    send_umode(target_p, true, oldmodes, modebuf);
  }

  sendto_common_channels_local(target_p, true, 0, 0, ":%s!%s@%s NICK :%s",
                               target_p->name, target_p->username,
                               target_p->host, new_nick);

  whowas_add_history(target_p, true);

  sendto_server(NULL, 0, 0, ":%s NICK %s :%ju",
                target_p->id, new_nick, target_p->tsinfo);

  hash_del_client(target_p);
  strlcpy(target_p->name, new_nick, sizeof(target_p->name));
  hash_add_client(target_p);

  watch_check_hash(target_p, RPL_LOGON);

  fd_note(target_p->connection->fd, "Nick: %s", target_p->name);
  return 0;
}

static struct Message svsnick_msgtab =
{
  .cmd = "SVSNICK",
  .args_min = 4,
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_ignore,
  .handlers[CLIENT_HANDLER] = m_ignore,
  .handlers[SERVER_HANDLER] = ms_svsnick,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = m_ignore
};

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

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	8688
Committed:	Sun Dec 2 12:46:22 2018 UTC (7 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	5016 byte(s)
Log Message:	- More bool conversion. This should be everything now.
#	User	Rev	Content
1	michael	1165	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	michael	1165	*
4	michael	2820	* Copyright (c) 1999 Bahamut development team.
5	michael	8279	* Copyright (c) 2011-2018 ircd-hybrid development team
6	michael	1165	*
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	michael	4565	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
20	michael	1165	* USA
21			*/
22
23			/*! \file m_svsnick.c
24	michael	1221	* \brief Includes required functions for processing the SVSNICK command.
25	michael	1165	* \version $Id$
26			*/
27
28	michael	2820
29	michael	1165	#include "stdinc.h"
30			#include "client.h"
31			#include "ircd.h"
32			#include "channel_mode.h"
33			#include "send.h"
34			#include "parse.h"
35			#include "modules.h"
36			#include "irc_string.h"
37	michael	3347	#include "user.h"
38	michael	1165	#include "hash.h"
39			#include "watch.h"
40			#include "whowas.h"
41
42
43	michael	3300	/*! \brief SVSNICK command handler
44	michael	1165	*
45			* \param source_p Pointer to allocated Client struct from which the message
46			* originally comes from. This can be a local or remote client.
47			* \param parc Integer holding the number of supplied arguments.
48			* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
49			* pointers.
50			* \note Valid arguments for this command are:
51	michael	3096	* - parv[0] = command
52	michael	1165	* - parv[1] = old nickname
53	michael	7856	* - parv[2] = old timestamp
54	michael	7855	* - parv[3] = new nickname
55			* - parv[4] = new timestamp
56	michael	1165	*/
57	michael	2820	static int
58	michael	3156	ms_svsnick(struct Client source_p, int parc, char parv[])
59	michael	1165	{
60			struct Client target_p = NULL, exists_p = NULL;
61	michael	7855	const char new_nick = parc == 5 ? parv[3] : parv[2]; / TBR: compatibility mode */
62			uintmax_t ts = 0, new_ts = 0;
63	michael	1165
64	michael	7469	if (!HasFlag(source_p, FLAGS_SERVICE))
65	michael	2820	return 0;
66	michael	1165
67	michael	8660	if (valid_nickname(new_nick, true) == false)
68	michael	7469	return 0;
69
70	michael	3967	if ((target_p = find_person(source_p, parv[1])) == NULL)
71	michael	2820	return 0;
72	michael	1165
73	michael	7855	if (parc == 5) /* TBR: compatibility mode */
74			{
75			ts = strtoumax(parv[2], NULL, 10);
76			if (ts && (ts != target_p->tsinfo))
77			return 0;
78			}
79			else /* parc == 4 */
80			ts = strtoumax(parv[3], NULL, 10);
81
82			if (parc == 4) /* TBR: compatibility mode */
83			new_ts = ts;
84			else
85			new_ts = strtoumax(parv[4], NULL, 10);
86
87	michael	3967	if (!MyConnect(target_p))
88			{
89			if (target_p->from == source_p->from)
90			{
91			sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
92			"Received wrong-direction SVSNICK "
93			"for %s (behind %s) from %s",
94			target_p->name, source_p->from->name,
95	michael	7997	client_get_name(source_p, HIDE_IP));
96	michael	3967	return 0;
97			}
98
99			sendto_one(target_p, ":%s SVSNICK %s %s %s", source_p->id,
100	michael	7855	target_p->id, new_nick, parv[3]);
101	michael	2820	return 0;
102	michael	3967	}
103	michael	1165
104	michael	7855	if ((exists_p = hash_find_client(new_nick)))
105	michael	1165	{
106	michael	3138	if (target_p == exists_p)
107			{
108	michael	8603	if (strcmp(target_p->name, new_nick) == 0)
109	michael	3138	return 0;
110			}
111			else if (IsUnknown(exists_p))
112	michael	3171	exit_client(exists_p, "SVSNICK Override");
113	michael	1165	else
114			{
115	michael	3171	exit_client(target_p, "SVSNICK Collide");
116	michael	2820	return 0;
117	michael	1165	}
118			}
119
120	michael	7855	target_p->tsinfo = new_ts;
121	michael	7764	clear_ban_cache_list(&target_p->channel);
122	michael	1165	watch_check_hash(target_p, RPL_LOGOFF);
123
124			if (HasUMode(target_p, UMODE_REGISTERED))
125			{
126	michael	5548	const unsigned int oldmodes = target_p->umodes;
127	michael	3246	char modebuf[IRCD_BUFSIZE] = "";
128	michael	1165
129			DelUMode(target_p, UMODE_REGISTERED);
130	michael	8658	send_umode(target_p, true, oldmodes, modebuf);
131	michael	1165	}
132
133	michael	8688	sendto_common_channels_local(target_p, true, 0, 0, ":%s!%s@%s NICK :%s",
134	michael	1165	target_p->name, target_p->username,
135	michael	7855	target_p->host, new_nick);
136	michael	1165
137	michael	8664	whowas_add_history(target_p, true);
138	michael	1165
139	michael	6782	sendto_server(NULL, 0, 0, ":%s NICK %s :%ju",
140	michael	7855	target_p->id, new_nick, target_p->tsinfo);
141	michael	8059
142	michael	1165	hash_del_client(target_p);
143	michael	7855	strlcpy(target_p->name, new_nick, sizeof(target_p->name));
144	michael	1165	hash_add_client(target_p);
145
146			watch_check_hash(target_p, RPL_LOGON);
147
148	michael	8339	fd_note(target_p->connection->fd, "Nick: %s", target_p->name);
149	michael	2820	return 0;
150	michael	1165	}
151	michael	1230
152	michael	2820	static struct Message svsnick_msgtab =
153			{
154	michael	5881	.cmd = "SVSNICK",
155			.args_min = 4,
156			.args_max = MAXPARA,
157			.handlers[UNREGISTERED_HANDLER] = m_ignore,
158			.handlers[CLIENT_HANDLER] = m_ignore,
159			.handlers[SERVER_HANDLER] = ms_svsnick,
160			.handlers[ENCAP_HANDLER] = m_ignore,
161			.handlers[OPER_HANDLER] = m_ignore
162	michael	1230	};
163
164			static void
165			module_init(void)
166			{
167			mod_add_cmd(&svsnick_msgtab);
168			}
169
170			static void
171			module_exit(void)
172			{
173			mod_del_cmd(&svsnick_msgtab);
174			}
175
176	michael	2820	struct module module_entry =
177			{
178	michael	1230	.version = "$Revision$",
179			.modinit = module_init,
180			.modexit = module_exit,
181			};