8.2.x/modules/m_accept.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2000-2015 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_accept.c
 * \brief Includes required functions for processing the ACCEPT command.
 * \version $Id$
 */

#include "stdinc.h"
#include "client.h"
#include "irc_string.h"
#include "ircd.h"
#include "list.h"
#include "numeric.h"
#include "conf.h"
#include "send.h"
#include "parse.h"
#include "modules.h"
#include "memory.h"


/*! \brief Creates and sends a list of nick!user\@host masks a Client
 *         has on its acceptlist.
 *
 * \param source_p The actual Client the list will be sent to.
 */
static void
list_accepts(struct Client *source_p)
{
  int len = 0;
  char nicks[IRCD_BUFSIZE] = "";
  char *t = nicks;
  const dlink_node *node = NULL;

  /* :me.name 281 source_p->name :n1!u1@h1 n2!u2@h2 ...\r\n */
  /* 1       23456              78                     9 10 */
  len = strlen(me.name) + strlen(source_p->name) + 10;

  DLINK_FOREACH(node, source_p->connection->acceptlist.head)
  {
    const struct split_nuh_item *accept_p = node->data;
    size_t masklen = strlen(accept_p->nickptr) +
                     strlen(accept_p->userptr) +
                     strlen(accept_p->hostptr) + 3;  /* +3 for ! + @ + space */

    if ((t - nicks) + masklen + len > IRCD_BUFSIZE)
    {
      *(t - 1) = '\0';
      sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, nicks);
      t = nicks;
    }

    t += sprintf(t, "%s!%s@%s ",
                 accept_p->nickptr,
                 accept_p->userptr, accept_p->hostptr);
  }

  if (nicks[0])
  {
    *(t - 1) = '\0';
    sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, nicks);
  }

  sendto_one_numeric(source_p, &me, RPL_ENDOFACCEPT);
}

/*! \brief Allocates and adds a split_nuh_item holding a nick!user\@host
 *         mask to a Client's acceptlist.
 *
 * \param nuh      A split_nuh_item already prepared with required masks.
 * \param source_p The actual Client the new accept is added to.
 */
static void
add_accept(const struct split_nuh_item *nuh, struct Client *source_p)
{
  struct split_nuh_item *const accept_p = MyCalloc(sizeof(*accept_p));

  accept_p->nickptr = xstrdup(nuh->nickptr);
  accept_p->userptr = xstrdup(nuh->userptr);
  accept_p->hostptr = xstrdup(nuh->hostptr);

  dlinkAdd(accept_p, &accept_p->node, &source_p->connection->acceptlist);

  list_accepts(source_p);
}

/*! \brief ACCEPT 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] = comma-separated list of masks to be accepted or removed
 */
static int
m_accept(struct Client *source_p, int parc, char *parv[])
{
  char *mask = NULL;
  char *p = NULL;
  char nick[NICKLEN + 1] = "";
  char user[USERLEN + 1] = "";
  char host[HOSTLEN + 1] = "";
  struct split_nuh_item nuh;
  struct split_nuh_item *accept_p = NULL;

  if (EmptyString(parv[1]) || !strcmp(parv[1], "*"))
  {
    list_accepts(source_p);
    return 0;
  }

  for (mask = strtoken(&p, parv[1], ","); mask;
       mask = strtoken(&p,    NULL, ","))
  {
    if (*mask == '-' && *++mask)
    {
      nuh.nuhmask  = mask;
      nuh.nickptr  = nick;
      nuh.userptr  = user;
      nuh.hostptr  = host;

      nuh.nicksize = sizeof(nick);
      nuh.usersize = sizeof(user);
      nuh.hostsize = sizeof(host);

      split_nuh(&nuh);

      if ((accept_p = find_accept(nick, user, host, source_p, irccmp)) == NULL)
      {
        sendto_one_numeric(source_p, &me, ERR_ACCEPTNOT, nick, user, host);
        continue;
      }

      del_accept(accept_p, source_p);
    }
    else if (*mask)
    {
      if (dlink_list_length(&source_p->connection->acceptlist) >=
          ConfigGeneral.max_accept)
      {
        sendto_one_numeric(source_p, &me, ERR_ACCEPTFULL);
        return 0;
      }

      nuh.nuhmask  = mask;
      nuh.nickptr  = nick;
      nuh.userptr  = user;
      nuh.hostptr  = host;

      nuh.nicksize = sizeof(nick);
      nuh.usersize = sizeof(user);
      nuh.hostsize = sizeof(host);

      split_nuh(&nuh);

      if ((accept_p = find_accept(nick, user, host, source_p, irccmp)))
      {
        sendto_one_numeric(source_p, &me, ERR_ACCEPTEXIST, nick, user, host);
        continue;
      }

      add_accept(&nuh, source_p);
    }
  }

  return 0;
}

static struct Message accept_msgtab =
{
  .cmd = "ACCEPT",
  .args_max = MAXPARA,
  .handlers[UNREGISTERED_HANDLER] = m_unregistered,
  .handlers[CLIENT_HANDLER] = m_accept,
  .handlers[SERVER_HANDLER] = m_ignore,
  .handlers[ENCAP_HANDLER] = m_ignore,
  .handlers[OPER_HANDLER] = m_accept
};

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

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

struct module module_entry =
{
  .version = "$Revision$",
  .modinit = module_init,
  .modexit = module_exit,
};
Revision:	5880
Committed:	Sun May 3 16:01:42 2015 UTC (8 years, 11 months ago) by michael
Content type:	text/x-csrc
File size:	5900 byte(s)
Log Message:	- Use C99-style initializers in all struct Message items - Removed MFLG_SLOW - Removed DUMMY_HANDLER
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 2000-2015 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_accept.c
23	* \brief Includes required functions for processing the ACCEPT command.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "client.h"
29	#include "irc_string.h"
30	#include "ircd.h"
31	#include "list.h"
32	#include "numeric.h"
33	#include "conf.h"
34	#include "send.h"
35	#include "parse.h"
36	#include "modules.h"
37	#include "memory.h"
38
39
40	/*! \brief Creates and sends a list of nick!user\@host masks a Client
41	* has on its acceptlist.
42	*
43	* \param source_p The actual Client the list will be sent to.
44	*/
45	static void
46	list_accepts(struct Client *source_p)
47	{
48	int len = 0;
49	char nicks[IRCD_BUFSIZE] = "";
50	char *t = nicks;
51	const dlink_node *node = NULL;
52
53	/* :me.name 281 source_p->name :n1!u1@h1 n2!u2@h2 ...\r\n */
54	/* 1 23456 78 9 10 */
55	len = strlen(me.name) + strlen(source_p->name) + 10;
56
57	DLINK_FOREACH(node, source_p->connection->acceptlist.head)
58	{
59	const struct split_nuh_item *accept_p = node->data;
60	size_t masklen = strlen(accept_p->nickptr) +
61	strlen(accept_p->userptr) +
62	strlen(accept_p->hostptr) + 3; /* +3 for ! + @ + space */
63
64	if ((t - nicks) + masklen + len > IRCD_BUFSIZE)
65	{
66	*(t - 1) = '\0';
67	sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, nicks);
68	t = nicks;
69	}
70
71	t += sprintf(t, "%s!%s@%s ",
72	accept_p->nickptr,
73	accept_p->userptr, accept_p->hostptr);
74	}
75
76	if (nicks[0])
77	{
78	*(t - 1) = '\0';
79	sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, nicks);
80	}
81
82	sendto_one_numeric(source_p, &me, RPL_ENDOFACCEPT);
83	}
84
85	/*! \brief Allocates and adds a split_nuh_item holding a nick!user\@host
86	* mask to a Client's acceptlist.
87	*
88	* \param nuh A split_nuh_item already prepared with required masks.
89	* \param source_p The actual Client the new accept is added to.
90	*/
91	static void
92	add_accept(const struct split_nuh_item nuh, struct Client source_p)
93	{
94	struct split_nuh_item const accept_p = MyCalloc(sizeof(accept_p));
95
96	accept_p->nickptr = xstrdup(nuh->nickptr);
97	accept_p->userptr = xstrdup(nuh->userptr);
98	accept_p->hostptr = xstrdup(nuh->hostptr);
99
100	dlinkAdd(accept_p, &accept_p->node, &source_p->connection->acceptlist);
101
102	list_accepts(source_p);
103	}
104
105	/*! \brief ACCEPT command handler
106	*
107	* \param source_p Pointer to allocated Client struct from which the message
108	* originally comes from. This can be a local or remote client.
109	* \param parc Integer holding the number of supplied arguments.
110	* \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
111	* pointers.
112	* \note Valid arguments for this command are:
113	* - parv[0] = command
114	* - parv[1] = comma-separated list of masks to be accepted or removed
115	*/
116	static int
117	m_accept(struct Client source_p, int parc, char parv[])
118	{
119	char *mask = NULL;
120	char *p = NULL;
121	char nick[NICKLEN + 1] = "";
122	char user[USERLEN + 1] = "";
123	char host[HOSTLEN + 1] = "";
124	struct split_nuh_item nuh;
125	struct split_nuh_item *accept_p = NULL;
126
127	if (EmptyString(parv[1]) \|\| !strcmp(parv[1], "*"))
128	{
129	list_accepts(source_p);
130	return 0;
131	}
132
133	for (mask = strtoken(&p, parv[1], ","); mask;
134	mask = strtoken(&p, NULL, ","))
135	{
136	if (mask == '-' && ++mask)
137	{
138	nuh.nuhmask = mask;
139	nuh.nickptr = nick;
140	nuh.userptr = user;
141	nuh.hostptr = host;
142
143	nuh.nicksize = sizeof(nick);
144	nuh.usersize = sizeof(user);
145	nuh.hostsize = sizeof(host);
146
147	split_nuh(&nuh);
148
149	if ((accept_p = find_accept(nick, user, host, source_p, irccmp)) == NULL)
150	{
151	sendto_one_numeric(source_p, &me, ERR_ACCEPTNOT, nick, user, host);
152	continue;
153	}
154
155	del_accept(accept_p, source_p);
156	}
157	else if (*mask)
158	{
159	if (dlink_list_length(&source_p->connection->acceptlist) >=
160	ConfigGeneral.max_accept)
161	{
162	sendto_one_numeric(source_p, &me, ERR_ACCEPTFULL);
163	return 0;
164	}
165
166	nuh.nuhmask = mask;
167	nuh.nickptr = nick;
168	nuh.userptr = user;
169	nuh.hostptr = host;
170
171	nuh.nicksize = sizeof(nick);
172	nuh.usersize = sizeof(user);
173	nuh.hostsize = sizeof(host);
174
175	split_nuh(&nuh);
176
177	if ((accept_p = find_accept(nick, user, host, source_p, irccmp)))
178	{
179	sendto_one_numeric(source_p, &me, ERR_ACCEPTEXIST, nick, user, host);
180	continue;
181	}
182
183	add_accept(&nuh, source_p);
184	}
185	}
186
187	return 0;
188	}
189
190	static struct Message accept_msgtab =
191	{
192	.cmd = "ACCEPT",
193	.args_max = MAXPARA,
194	.handlers[UNREGISTERED_HANDLER] = m_unregistered,
195	.handlers[CLIENT_HANDLER] = m_accept,
196	.handlers[SERVER_HANDLER] = m_ignore,
197	.handlers[ENCAP_HANDLER] = m_ignore,
198	.handlers[OPER_HANDLER] = m_accept
199	};
200
201	static void
202	module_init(void)
203	{
204	mod_add_cmd(&accept_msgtab);
205	}
206
207	static void
208	module_exit(void)
209	{
210	mod_del_cmd(&accept_msgtab);
211	}
212
213	struct module module_entry =
214	{
215	.version = "$Revision$",
216	.modinit = module_init,
217	.modexit = module_exit,
218	};