ircd-hybrid/modules/m_accept.c

/*
 *  ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
 *  m_accept.c: Allows a user to talk to a +g user.
 *
 *  Copyright (C) 2002 by the past and present ircd coders, and others.
 *
 *  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., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 *  USA
 *
 *  $Id$
 */

#include "stdinc.h"
#include "handlers.h"
#include "client.h"
#include "hash.h"       /* for find_client() */
#include "ircd.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_serv.h"
#include "send.h"
#include "msg.h"
#include "parse.h"
#include "s_user.h"
#include "modules.h"

static void m_accept(struct Client *, struct Client *, int, char *[]);
static void build_nuh_list(struct Client *, char *, char *, char *);
static void add_accept(const char *, const char *, const char *, struct Client *);
static int del_accept(const char *, const char *, const char *, struct Client *);
static void list_accepts(struct Client *);

struct Message accept_msgtab = {
  "ACCEPT", 0, 0, 0, 0, MFLG_SLOW, 0,
  { m_unregistered, m_accept, m_ignore, m_ignore, m_accept, m_ignore }
};

#ifndef STATIC_MODULES
void
_modinit(void)
{
  mod_add_cmd(&accept_msgtab);
}

void
_moddeinit(void)
{
  mod_del_cmd(&accept_msgtab);
}

const char *_version = "$Revision$";
#endif

/*
 * m_accept - ACCEPT command handler
 *      parv[0] = sender prefix
 *      parv[1] = servername
 */
static void
m_accept(struct Client *client_p, struct Client *source_p,
         int parc, char *parv[])
{
  struct Accept *accept = NULL;
  char *mask, *nick, *user, *host;
  char *p = NULL;
  char addbuf[IRCD_BUFSIZE] = { '\0' };
  char delbuf[IRCD_BUFSIZE] = { '\0' };
  int accept_num = 0;
  
  if (parc < 2)
  {
    list_accepts(source_p);
    return;
  }

  build_nuh_list(source_p, addbuf, delbuf, parv[1]);

  /* parse the delete list */
  for (mask = strtoken(&p, delbuf, ","); mask != NULL;
       mask = strtoken(&p, NULL,   ","))
  {
    /* user isn't on clients accept list */
    split_nuh(mask, &nick, &user, &host);

    if ((accept = find_accept(nick, user, host, source_p, 0)) == NULL)
    {
      sendto_one(source_p, form_str(ERR_ACCEPTNOT),
                 me.name, source_p->name, nick, user, host);
      MyFree(nick);
      MyFree(user);
      MyFree(host);
      continue;
    }

    del_accept(accept, source_p);

    MyFree(nick);
    MyFree(user);
    MyFree(host);
  }

  /* get the number of accepts they have */ 
  accept_num = dlink_list_length(&source_p->localClient->acceptlist);

  /* parse the add list */
  for (mask = strtoken(&p, addbuf, ","); mask;
       mask = strtoken(&p, NULL,   ","), ++accept_num)
  {
     /* user is already on clients accept list */
    split_nuh(mask, &nick, &user, &host);

    if ((accept = find_accept(nick, user, host, source_p, 0)) != NULL)
    {
      sendto_one(source_p, form_str(ERR_ACCEPTEXIST),
                 me.name, source_p->name, nick, user, host);
      MyFree(nick);
      MyFree(user);
      MyFree(host);
      continue;
    }

    if (accept_num >= ConfigFileEntry.max_accept)
    {
      sendto_one(source_p, form_str(ERR_ACCEPTFULL),
                 me.name, source_p->name);
      MyFree(nick);
      MyFree(user);
      MyFree(host);
      return;
    }

    add_accept(nick, user, host, source_p);
    MyFree(nick);
    MyFree(user);
    MyFree(host);
  }
}

/* build_nuh_list()
 *
 * input        - pointer to client
 *              - pointer to addbuffer
 *              - pointer to remove buffer
 *              - pointer to list of nicks
 *              - pointer to list of nicks!user@host
 * output       - 
 * side effects - addbuf/delbuf are modified to give valid masks
 */
static void
build_nuh_list(struct Client *source_p, char *addbuf,
               char *delbuf, char *mask)
{
  char *mask = NULL;
  char *p = NULL;
  char *buf_p = NULL;

  *addbuf = *delbuf = '\0';

  /* build list of nuh to add into addbuf, nuh to remove in delbuf */
  for (mask = strtoken(&p, mask, ","); mask; 
       mask = strtoken(&p, NULL, ","))
  {
    if (*mask == '-')
      buf_p = delbuf, ++name;
    else
      buf_p = addbuf;

    if (*buf_p)
      strlcat(buf_p, ",", IRCD_BUFSIZE);
    strlcat(buf_p, mask, IRCD_BUFSIZE);
  }
}

/* add_accept()
 *
 * input        - nick
 *              - username
 *              - host
 *              - pointer to client to add to acceptlist
 * output       - none
 * side effects - target is added to clients list
 */
static void
add_accept(const char *nick, const char *user,
           const char *host, struct Client *source_p)
{
  struct Accept *accept = MyMalloc(sizeof(*accept));

  DupString(accept->nick, nick);
  DupString(accept->user, user);
  DupString(accept->host, host);

  dlinkAdd(accept, &accept->node, &source_p->localClient->acceptlist);

  list_accepts(source_p);
}

/* list_accepts()
 *
 * input        - pointer to client
 * output       - none
 * side effects - print accept list to client
 */
static void
list_accepts(struct Client *source_p)
{
  struct Accept *accept;
  int len = 0;
  char nuh_list[IRCD_BUFSIZE] = { '\0' };
  char *t = nuh_list;
  const dlink_node *ptr = NULL;

  len = strlen(me.name) + strlen(source_p->name) + 12;

  DLINK_FOREACH(ptr, source_p->localClient->acceptlist.head)
  {
    accept = ptr->data;

    if ((t - nuh_list) + strlen(source_p->name) + len > IRCD_BUFSIZE)
    {
      *(t - 1) = '\0';
      sendto_one(source_p, form_str(RPL_ACCEPTLIST),
                 me.name, source_p->name, nuh_list);
      t = nuh_list;
    }

    t += ircsprintf(t, "%s!%s@%s ",
                    accept->nick, accept->user, accept->host);
  }

  if (nuh_list[0] != '\0')
  {
    *(t - 1) = '\0';
    sendto_one(source_p, form_str(RPL_ACCEPTLIST),
               me.name, source_p->name, nuh_list);
  }

  sendto_one(source_p, form_str(RPL_ENDOFACCEPT),
             me.name, source_p->name);
}
Revision:	235
Committed:	Sat Nov 5 11:31:51 2005 UTC (20 years, 9 months ago) by michael
Content type:	text/x-csrc
File size:	6346 byte(s)
Log Message:	- Fixed and cleaned up new acceptcode, e.g fix memory leaks, don't allow wildcards in a mask when removing accepts, don't allow redundant masks etc.
#	User	Rev	Content
1	adx	30	/*
2			* ircd-hybrid: an advanced Internet Relay Chat Daemon(ircd).
3			* m_accept.c: Allows a user to talk to a +g user.
4			*
5			* Copyright (C) 2002 by the past and present ircd coders, and others.
6			*
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			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
20			* USA
21			*
22	knight	31	* $Id$
23	adx	30	*/
24
25			#include "stdinc.h"
26			#include "handlers.h"
27			#include "client.h"
28			#include "hash.h" /* for find_client() */
29			#include "ircd.h"
30			#include "numeric.h"
31			#include "s_conf.h"
32			#include "s_serv.h"
33			#include "send.h"
34			#include "msg.h"
35			#include "parse.h"
36			#include "s_user.h"
37			#include "modules.h"
38
39			static void m_accept(struct Client , struct Client , int, char *[]);
40	db	232	static void build_nuh_list(struct Client , char , char , char );
41	michael	235	static void add_accept(const char , const char , const char , struct Client );
42			static int del_accept(const char , const char , const char , struct Client );
43	adx	30	static void list_accepts(struct Client *);
44
45			struct Message accept_msgtab = {
46	michael	235	"ACCEPT", 0, 0, 0, 0, MFLG_SLOW, 0,
47			{ m_unregistered, m_accept, m_ignore, m_ignore, m_accept, m_ignore }
48	adx	30	};
49
50			#ifndef STATIC_MODULES
51			void
52			_modinit(void)
53			{
54			mod_add_cmd(&accept_msgtab);
55			}
56
57			void
58			_moddeinit(void)
59			{
60			mod_del_cmd(&accept_msgtab);
61			}
62
63	knight	31	const char *_version = "$Revision$";
64	adx	30	#endif
65
66			/*
67			* m_accept - ACCEPT command handler
68			* parv[0] = sender prefix
69			* parv[1] = servername
70			*/
71			static void
72			m_accept(struct Client client_p, struct Client source_p,
73			int parc, char *parv[])
74			{
75	michael	235	struct Accept *accept = NULL;
76	db	232	char mask, nick, user, host;
77	adx	30	char *p = NULL;
78			char addbuf[IRCD_BUFSIZE] = { '\0' };
79			char delbuf[IRCD_BUFSIZE] = { '\0' };
80	michael	235	int accept_num = 0;
81	adx	30
82	db	232	if (parc < 2)
83	adx	30	{
84			list_accepts(source_p);
85			return;
86			}
87
88	db	232	build_nuh_list(source_p, addbuf, delbuf, parv[1]);
89	adx	30
90			/* parse the delete list */
91	db	232	for (mask = strtoken(&p, delbuf, ","); mask != NULL;
92	michael	235	mask = strtoken(&p, NULL, ","))
93	adx	30	{
94	db	232	/* user isn't on clients accept list */
95			split_nuh(mask, &nick, &user, &host);
96	michael	235
97			if ((accept = find_accept(nick, user, host, source_p, 0)) == NULL)
98	adx	30	{
99			sendto_one(source_p, form_str(ERR_ACCEPTNOT),
100	db	232	me.name, source_p->name, nick, user, host);
101	michael	235	MyFree(nick);
102			MyFree(user);
103			MyFree(host);
104	adx	30	continue;
105			}
106
107	michael	235	del_accept(accept, source_p);
108
109			MyFree(nick);
110			MyFree(user);
111			MyFree(host);
112	adx	30	}
113
114			/* get the number of accepts they have */
115	db	232	accept_num = dlink_list_length(&source_p->localClient->acceptlist);
116	adx	30
117			/* parse the add list */
118	db	232	for (mask = strtoken(&p, addbuf, ","); mask;
119	michael	235	mask = strtoken(&p, NULL, ","), ++accept_num)
120	adx	30	{
121	db	232	/* user is already on clients accept list */
122			split_nuh(mask, &nick, &user, &host);
123	adx	30
124	michael	235	if ((accept = find_accept(nick, user, host, source_p, 0)) != NULL)
125	adx	30	{
126			sendto_one(source_p, form_str(ERR_ACCEPTEXIST),
127	db	232	me.name, source_p->name, nick, user, host);
128	michael	235	MyFree(nick);
129			MyFree(user);
130			MyFree(host);
131	adx	30	continue;
132			}
133
134			if (accept_num >= ConfigFileEntry.max_accept)
135			{
136			sendto_one(source_p, form_str(ERR_ACCEPTFULL),
137			me.name, source_p->name);
138	michael	235	MyFree(nick);
139			MyFree(user);
140			MyFree(host);
141	adx	30	return;
142			}
143	db	232
144			add_accept(nick, user, host, source_p);
145	michael	235	MyFree(nick);
146			MyFree(user);
147			MyFree(host);
148	adx	30	}
149			}
150
151	db	232	/* build_nuh_list()
152	adx	30	*
153			* input - pointer to client
154			* - pointer to addbuffer
155			* - pointer to remove buffer
156			* - pointer to list of nicks
157	db	232	* - pointer to list of nicks!user@host
158	adx	30	* output -
159	db	232	* side effects - addbuf/delbuf are modified to give valid masks
160	adx	30	*/
161			static void
162	db	232	build_nuh_list(struct Client source_p, char addbuf,
163	michael	235	char delbuf, char mask)
164	adx	30	{
165	db	232	char *mask = NULL;
166	adx	30	char *p = NULL;
167	michael	235	char *buf_p = NULL;
168	adx	30
169	db	232	addbuf = delbuf = '\0';
170
171			/* build list of nuh to add into addbuf, nuh to remove in delbuf */
172	michael	235	for (mask = strtoken(&p, mask, ","); mask;
173	db	232	mask = strtoken(&p, NULL, ","))
174	adx	30	{
175	db	232	if (*mask == '-')
176	michael	235	buf_p = delbuf, ++name;
177			else
178			buf_p = addbuf;
179	db	232
180	michael	235	if (*buf_p)
181			strlcat(buf_p, ",", IRCD_BUFSIZE);
182			strlcat(buf_p, mask, IRCD_BUFSIZE);
183	adx	30	}
184			}
185
186			/* add_accept()
187			*
188	db	232	* input - nick
189			* - username
190			* - host
191			* - pointer to client to add to acceptlist
192	adx	30	* output - none
193			* side effects - target is added to clients list
194			*/
195			static void
196	michael	235	add_accept(const char nick, const char user,
197			const char host, struct Client source_p)
198	adx	30	{
199	michael	235	struct Accept accept = MyMalloc(sizeof(accept));
200
201			DupString(accept->nick, nick);
202			DupString(accept->user, user);
203	db	232	DupString(accept->host, host);
204	michael	235
205	db	232	dlinkAdd(accept, &accept->node, &source_p->localClient->acceptlist);
206
207	adx	30	list_accepts(source_p);
208			}
209
210			/* list_accepts()
211			*
212			* input - pointer to client
213			* output - none
214			* side effects - print accept list to client
215			*/
216			static void
217			list_accepts(struct Client *source_p)
218			{
219	db	232	struct Accept *accept;
220	adx	30	int len = 0;
221	db	232	char nuh_list[IRCD_BUFSIZE] = { '\0' };
222			char *t = nuh_list;
223	adx	30	const dlink_node *ptr = NULL;
224
225			len = strlen(me.name) + strlen(source_p->name) + 12;
226
227	db	232	DLINK_FOREACH(ptr, source_p->localClient->acceptlist.head)
228	adx	30	{
229	db	232	accept = ptr->data;
230	adx	30
231	db	232	if ((t - nuh_list) + strlen(source_p->name) + len > IRCD_BUFSIZE)
232	adx	30	{
233			*(t - 1) = '\0';
234			sendto_one(source_p, form_str(RPL_ACCEPTLIST),
235	db	232	me.name, source_p->name, nuh_list);
236			t = nuh_list;
237	adx	30	}
238
239	db	232	t += ircsprintf(t, "%s!%s@%s ",
240	michael	235	accept->nick, accept->user, accept->host);
241	adx	30	}
242
243	db	232	if (nuh_list[0] != '\0')
244	adx	30	{
245			*(t - 1) = '\0';
246			sendto_one(source_p, form_str(RPL_ACCEPTLIST),
247	db	232	me.name, source_p->name, nuh_list);
248	adx	30	}
249
250			sendto_one(source_p, form_str(RPL_ENDOFACCEPT),
251			me.name, source_p->name);
252			}