trunk/modules/m_accept.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 2000-2021 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)
{
  char buf[IRCD_BUFSIZE];
  char *bufptr = buf;
  dlink_node *node;

  /* :me.name 281 source_p->name :n1!u1@h1 n2!u2@h2 ...\r\n */
  /* 1       23456              78                     9 10 */
  size_t 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 ((bufptr - buf) + masklen + len > sizeof(buf))
    {
      *(bufptr - 1) = '\0';
      sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, buf);
      bufptr = buf;
    }

    bufptr += snprintf(bufptr, sizeof(buf) - (bufptr - buf), "%s!%s@%s ",
                       accept_p->nickptr,
                       accept_p->userptr,
                       accept_p->hostptr);
  }

  if (bufptr != buf)
  {
    *(bufptr - 1) = '\0';
    sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, buf);
  }

  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 *accept_p = xcalloc(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 void
m_accept(struct Client *source_p, int parc, char *parv[])
{
  struct split_nuh_item nuh;
  struct split_nuh_item *accept_p = NULL;
  char nick[NICKLEN + 1];
  char user[USERLEN + 1];
  char host[HOSTLEN + 1];
  char *p = NULL;
  char *mask = collapse(parv[1]);

  if (EmptyString(mask) || strcmp(mask, "*") == 0)
  {
    list_accepts(source_p);
    return;
  }

  for (mask = strtok_r(mask, ",", &p); mask;
       mask = strtok_r(NULL, ",", &p))
  {
    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;
      }

      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);
    }
  }
}

static struct Message accept_msgtab =
{
  .cmd = "ACCEPT",
  .handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
  .handlers[CLIENT_HANDLER] = { .handler = m_accept },
  .handlers[SERVER_HANDLER] = { .handler = m_ignore },
  .handlers[ENCAP_HANDLER] = { .handler = m_ignore },
  .handlers[OPER_HANDLER] = { .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:	9857
Committed:	Fri Jan 1 04:43:22 2021 UTC (4 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	5976 byte(s)
Log Message:	- Bump copyright years
#	User	Rev	Content
1	adx	30	/*
2	michael	2820	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	adx	30	*
4	michael	9857	* Copyright (c) 2000-2021 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	1007	/*! \file m_accept.c
23			* \brief Includes required functions for processing the ACCEPT command.
24			* \version $Id$
25			*/
26
27	adx	30	#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	michael	1309	#include "conf.h"
34	adx	30	#include "send.h"
35			#include "parse.h"
36			#include "modules.h"
37	michael	1666	#include "memory.h"
38	adx	30
39
40	michael	1007	/*! \brief Creates and sends a list of nick!user\@host masks a Client
41			* has on its acceptlist.
42	michael	887	*
43	michael	1007	* \param source_p The actual Client the list will be sent to.
44	adx	30	*/
45			static void
46	michael	1007	list_accepts(struct Client *source_p)
47			{
48	michael	9344	char buf[IRCD_BUFSIZE];
49			char *bufptr = buf;
50	michael	7687	dlink_node *node;
51	michael	1007
52	michael	4955	/* :me.name 281 source_p->name :n1!u1@h1 n2!u2@h2 ...\r\n */
53	michael	4014	/* 1 23456 78 9 10 */
54	michael	9348	size_t len = strlen(me.name) + strlen(source_p->name) + 10;
55	michael	1007
56	michael	4815	DLINK_FOREACH(node, source_p->connection->acceptlist.head)
57	michael	1007	{
58	michael	4975	const struct split_nuh_item *accept_p = node->data;
59			size_t masklen = strlen(accept_p->nickptr) +
60			strlen(accept_p->userptr) +
61			strlen(accept_p->hostptr) + 3; /* +3 for ! + @ + space */
62	michael	1007
63	michael	9344	if ((bufptr - buf) + masklen + len > sizeof(buf))
64	michael	1007	{
65	michael	9344	*(bufptr - 1) = '\0';
66			sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, buf);
67			bufptr = buf;
68	michael	1007	}
69
70	michael	9348	bufptr += snprintf(bufptr, sizeof(buf) - (bufptr - buf), "%s!%s@%s ",
71	michael	9346	accept_p->nickptr,
72			accept_p->userptr,
73			accept_p->hostptr);
74	michael	1007	}
75
76	michael	9344	if (bufptr != buf)
77	michael	1007	{
78	michael	9344	*(bufptr - 1) = '\0';
79			sendto_one_numeric(source_p, &me, RPL_ACCEPTLIST, buf);
80	michael	1007	}
81
82	michael	3109	sendto_one_numeric(source_p, &me, RPL_ENDOFACCEPT);
83	michael	1007	}
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	michael	887	add_accept(const struct split_nuh_item nuh, struct Client source_p)
93			{
94	michael	8431	struct split_nuh_item accept_p = xcalloc(sizeof(accept_p));
95	michael	887
96	michael	4975	accept_p->nickptr = xstrdup(nuh->nickptr);
97			accept_p->userptr = xstrdup(nuh->userptr);
98			accept_p->hostptr = xstrdup(nuh->hostptr);
99	michael	887
100	michael	4975	dlinkAdd(accept_p, &accept_p->node, &source_p->connection->acceptlist);
101	michael	887
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	michael	3096	* - parv[0] = command
114	michael	3300	* - parv[1] = comma-separated list of masks to be accepted or removed
115	michael	887	*/
116	michael	9077	static void
117	michael	3156	m_accept(struct Client source_p, int parc, char parv[])
118	adx	30	{
119	michael	6466	struct split_nuh_item nuh;
120			struct split_nuh_item *accept_p = NULL;
121	michael	9834	char nick[NICKLEN + 1];
122			char user[USERLEN + 1];
123			char host[HOSTLEN + 1];
124	michael	6466	char *p = NULL;
125			char *mask = collapse(parv[1]);
126	michael	887
127	michael	8603	if (EmptyString(mask) \|\| strcmp(mask, "*") == 0)
128	adx	30	{
129			list_accepts(source_p);
130	michael	9077	return;
131	adx	30	}
132
133	michael	6546	for (mask = strtok_r(mask, ",", &p); mask;
134			mask = strtok_r(NULL, ",", &p))
135	adx	30	{
136	michael	3605	if (mask == '-' && ++mask)
137	adx	30	{
138	michael	887	nuh.nuhmask = mask;
139			nuh.nickptr = nick;
140			nuh.userptr = user;
141			nuh.hostptr = host;
142	adx	30
143	michael	887	nuh.nicksize = sizeof(nick);
144			nuh.usersize = sizeof(user);
145			nuh.hostsize = sizeof(host);
146	adx	30
147	michael	887	split_nuh(&nuh);
148	adx	30
149	michael	4975	if ((accept_p = find_accept(nick, user, host, source_p, irccmp)) == NULL)
150	michael	887	{
151	michael	3109	sendto_one_numeric(source_p, &me, ERR_ACCEPTNOT, nick, user, host);
152	michael	887	continue;
153			}
154	adx	30
155	michael	4975	del_accept(accept_p, source_p);
156	adx	30	}
157	michael	3605	else if (*mask)
158	adx	30	{
159	michael	8431	if (dlink_list_length(&source_p->connection->acceptlist) >= ConfigGeneral.max_accept)
160	michael	887	{
161	michael	3109	sendto_one_numeric(source_p, &me, ERR_ACCEPTFULL);
162	michael	9077	return;
163	michael	887	}
164	adx	30
165	michael	887	nuh.nuhmask = mask;
166			nuh.nickptr = nick;
167			nuh.userptr = user;
168			nuh.hostptr = host;
169	adx	30
170	michael	887	nuh.nicksize = sizeof(nick);
171			nuh.usersize = sizeof(user);
172			nuh.hostsize = sizeof(host);
173	adx	30
174	michael	887	split_nuh(&nuh);
175	adx	30
176	michael	4975	if ((accept_p = find_accept(nick, user, host, source_p, irccmp)))
177	michael	887	{
178	michael	3109	sendto_one_numeric(source_p, &me, ERR_ACCEPTEXIST, nick, user, host);
179	michael	887	continue;
180			}
181
182			add_accept(&nuh, source_p);
183	adx	30	}
184			}
185			}
186	michael	1230
187	michael	2820	static struct Message accept_msgtab =
188			{
189	michael	5881	.cmd = "ACCEPT",
190	michael	9374	.handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
191			.handlers[CLIENT_HANDLER] = { .handler = m_accept },
192			.handlers[SERVER_HANDLER] = { .handler = m_ignore },
193			.handlers[ENCAP_HANDLER] = { .handler = m_ignore },
194			.handlers[OPER_HANDLER] = { .handler = m_accept }
195	michael	1230	};
196
197			static void
198			module_init(void)
199			{
200			mod_add_cmd(&accept_msgtab);
201			}
202
203			static void
204			module_exit(void)
205			{
206			mod_del_cmd(&accept_msgtab);
207			}
208
209	michael	2820	struct module module_entry =
210			{
211	michael	1230	.version = "$Revision$",
212			.modinit = module_init,
213			.modexit = module_exit,
214			};