trunk/src/isupport.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2020 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 isupport.c
 * \brief Contains functions pertaining to RPL_ISUPPORT.
 * \version $Id$
 */

#include "stdinc.h"
#include "list.h"
#include "ircd.h"
#include "conf.h"
#include "send.h"
#include "numeric.h"
#include "client.h"
#include "irc_string.h"
#include "memory.h"
#include "isupport.h"
#include "channel.h"
#include "channel_mode.h"
#include "parse.h"


/* Used for building up the isupport string,
 * used with init_isupport, add_isupport, delete_isupport
 */
struct Isupport
{
  dlink_node node;
  char *name;
  char *options;
  int number;
};

static dlink_list isupport_list;
static dlink_list isupport_list_lines;

/*
 * isupport_init()
 *
 * input        - NONE
 * output       - NONE
 * side effects - Must be called before isupport is enabled
 */
void
isupport_init(void)
{
  isupport_add("CALLERID", NULL, -1);
  isupport_add("CASEMAPPING", "ascii", -1);
  isupport_add("DEAF", "D", -1);
  isupport_add("KICKLEN", NULL, KICKLEN);
  isupport_add("MODES", NULL, MAXMODEPARAMS);
  isupport_add("PREFIX", "(ohv)" CMEMBER_STATUS_FLAGS, -1);
  isupport_add("STATUSMSG", CMEMBER_STATUS_FLAGS, -1);
  isupport_add("EXCEPTS", NULL, -1);
  isupport_add("INVEX", NULL, -1);
}

/*
 * isupport_add()
 *
 * input        - name of supported function
 *              - options if any
 *              - number if any
 * output       - NONE
 * side effects - Each supported item must call this when activated
 */
void
isupport_add(const char *name, const char *options, int n)
{
  dlink_node *node = NULL;
  struct Isupport *support = NULL;

  DLINK_FOREACH(node, isupport_list.head)
  {
    support = node->data;
    if (irccmp(support->name, name) == 0)
    {
      xfree(support->name);
      xfree(support->options);
      break;
    }
  }

  if (node == NULL)
  {
    support = xcalloc(sizeof(*support));
    dlinkAddTail(support, &support->node, &isupport_list);
  }

  support->name = xstrdup(name);
  if (options)
    support->options = xstrdup(options);
  support->number = n;

  isupport_rebuild();
}

/*
 * isupport_delete()
 *
 * input        - name of supported function
 * output       - NONE
 * side effects - Each supported item must call this when deactivated
 */
void
isupport_delete(const char *name)
{
  dlink_node *node = NULL;

  DLINK_FOREACH(node, isupport_list.head)
  {
    struct Isupport *support = node->data;

    if (irccmp(support->name, name) == 0)
    {
      dlinkDelete(node, &isupport_list);
      xfree(support->name);
      xfree(support->options);
      xfree(support);
      break;
    }
  }

  isupport_rebuild();
}

/*
 * issuport_rebuild()
 *
 * input        - NONE
 * output       - NONE
 * side effects - Destroy the isupport MessageFile lines, and rebuild.
 */
void
isupport_rebuild(void)
{
  char isupportbuffer[IRCD_BUFSIZE];
  char *p = isupportbuffer;
  dlink_node *node = NULL, *node_next = NULL;
  int n = 0;
  int tokens = 0;
  size_t len = 0;
  size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT));

  DLINK_FOREACH_SAFE(node, node_next, isupport_list_lines.head)
  {
    dlinkDelete(node, &isupport_list_lines);
    xfree(node->data);
    free_dlink_node(node);
  }

  DLINK_FOREACH(node, isupport_list.head)
  {
    struct Isupport *support = node->data;

    p += (n = sprintf(p, "%s", support->name));
    len += n;

    if (support->options)
    {
      p += (n = sprintf(p, "=%s", support->options));
      len += n;
    }

    if (support->number > 0)
    {
      p += (n = sprintf(p, "=%d", support->number));
      len += n;
    }

    *p++ = ' ';
    len++;
    *p = '\0';

    if (++tokens == (MAXPARA-2) || len >= (sizeof(isupportbuffer)-reserve))
    { /* arbritrary for now */
      if (*--p == ' ')
        *p = '\0';

      dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &isupport_list_lines);
      p = isupportbuffer;
      len = 0;
      n = 0;
      tokens = 0;
    }
  }

  if (len)
  {
    if (*--p == ' ')
      *p = '\0';
    dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &isupport_list_lines);
  }
}

/* isupport_show()
 *
 * inputs       - pointer to client
 * output       - NONE
 * side effects - display to client what we support (for them)
 */
void
isupport_show(struct Client *source_p)
{
  const dlink_node *node = NULL;

  DLINK_FOREACH(node, isupport_list_lines.head)
    sendto_one_numeric(source_p, &me, RPL_ISUPPORT, node->data);
}
Revision:	9234
Committed:	Fri Jan 31 17:38:34 2020 UTC (5 years, 6 months ago) by michael
Content type:	text/x-csrc
File size:	5254 byte(s)
Log Message:	- Extbans have been implemented. Main implementation done by Adam for p4. Currently supported extbans: Matching: $a:<account> Matches users logged into a matching account. $c:<channel> Matches users that are on the given channel. An additional prefix of either @, %, or + can be specified to test for certain channel privileges. $o:<class> Matches IRC operators that have joined a class matching the mask. $r:<realname> Matches users with a matching realname. $s:<server> Matches users that are connected to a server matching the mask. $u:<modes> Matches users having the specified user modes set or not set. $z:<certfp> Matches users having the given TLS certificate fingerprint. Acting: $j:<banmask> Prevents matching users from joining the channel. $m:<banmask> Blocks messages from matching users. Users with voice or above are not affected.
#	Content
1	/*
2	* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3	*
4	* Copyright (c) 1997-2020 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 isupport.c
23	* \brief Contains functions pertaining to RPL_ISUPPORT.
24	* \version $Id$
25	*/
26
27	#include "stdinc.h"
28	#include "list.h"
29	#include "ircd.h"
30	#include "conf.h"
31	#include "send.h"
32	#include "numeric.h"
33	#include "client.h"
34	#include "irc_string.h"
35	#include "memory.h"
36	#include "isupport.h"
37	#include "channel.h"
38	#include "channel_mode.h"
39	#include "parse.h"
40
41
42	/* Used for building up the isupport string,
43	* used with init_isupport, add_isupport, delete_isupport
44	*/
45	struct Isupport
46	{
47	dlink_node node;
48	char *name;
49	char *options;
50	int number;
51	};
52
53	static dlink_list isupport_list;
54	static dlink_list isupport_list_lines;
55
56	/*
57	* isupport_init()
58	*
59	* input - NONE
60	* output - NONE
61	* side effects - Must be called before isupport is enabled
62	*/
63	void
64	isupport_init(void)
65	{
66	isupport_add("CALLERID", NULL, -1);
67	isupport_add("CASEMAPPING", "ascii", -1);
68	isupport_add("DEAF", "D", -1);
69	isupport_add("KICKLEN", NULL, KICKLEN);
70	isupport_add("MODES", NULL, MAXMODEPARAMS);
71	isupport_add("PREFIX", "(ohv)" CMEMBER_STATUS_FLAGS, -1);
72	isupport_add("STATUSMSG", CMEMBER_STATUS_FLAGS, -1);
73	isupport_add("EXCEPTS", NULL, -1);
74	isupport_add("INVEX", NULL, -1);
75	}
76
77	/*
78	* isupport_add()
79	*
80	* input - name of supported function
81	* - options if any
82	* - number if any
83	* output - NONE
84	* side effects - Each supported item must call this when activated
85	*/
86	void
87	isupport_add(const char name, const char options, int n)
88	{
89	dlink_node *node = NULL;
90	struct Isupport *support = NULL;
91
92	DLINK_FOREACH(node, isupport_list.head)
93	{
94	support = node->data;
95	if (irccmp(support->name, name) == 0)
96	{
97	xfree(support->name);
98	xfree(support->options);
99	break;
100	}
101	}
102
103	if (node == NULL)
104	{
105	support = xcalloc(sizeof(*support));
106	dlinkAddTail(support, &support->node, &isupport_list);
107	}
108
109	support->name = xstrdup(name);
110	if (options)
111	support->options = xstrdup(options);
112	support->number = n;
113
114	isupport_rebuild();
115	}
116
117	/*
118	* isupport_delete()
119	*
120	* input - name of supported function
121	* output - NONE
122	* side effects - Each supported item must call this when deactivated
123	*/
124	void
125	isupport_delete(const char *name)
126	{
127	dlink_node *node = NULL;
128
129	DLINK_FOREACH(node, isupport_list.head)
130	{
131	struct Isupport *support = node->data;
132
133	if (irccmp(support->name, name) == 0)
134	{
135	dlinkDelete(node, &isupport_list);
136	xfree(support->name);
137	xfree(support->options);
138	xfree(support);
139	break;
140	}
141	}
142
143	isupport_rebuild();
144	}
145
146	/*
147	* issuport_rebuild()
148	*
149	* input - NONE
150	* output - NONE
151	* side effects - Destroy the isupport MessageFile lines, and rebuild.
152	*/
153	void
154	isupport_rebuild(void)
155	{
156	char isupportbuffer[IRCD_BUFSIZE];
157	char *p = isupportbuffer;
158	dlink_node node = NULL, node_next = NULL;
159	int n = 0;
160	int tokens = 0;
161	size_t len = 0;
162	size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT));
163
164	DLINK_FOREACH_SAFE(node, node_next, isupport_list_lines.head)
165	{
166	dlinkDelete(node, &isupport_list_lines);
167	xfree(node->data);
168	free_dlink_node(node);
169	}
170
171	DLINK_FOREACH(node, isupport_list.head)
172	{
173	struct Isupport *support = node->data;
174
175	p += (n = sprintf(p, "%s", support->name));
176	len += n;
177
178	if (support->options)
179	{
180	p += (n = sprintf(p, "=%s", support->options));
181	len += n;
182	}
183
184	if (support->number > 0)
185	{
186	p += (n = sprintf(p, "=%d", support->number));
187	len += n;
188	}
189
190	*p++ = ' ';
191	len++;
192	*p = '\0';
193
194	if (++tokens == (MAXPARA-2) \|\| len >= (sizeof(isupportbuffer)-reserve))
195	{ /* arbritrary for now */
196	if (*--p == ' ')
197	*p = '\0';
198
199	dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &isupport_list_lines);
200	p = isupportbuffer;
201	len = 0;
202	n = 0;
203	tokens = 0;
204	}
205	}
206
207	if (len)
208	{
209	if (*--p == ' ')
210	*p = '\0';
211	dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &isupport_list_lines);
212	}
213	}
214
215	/* isupport_show()
216	*
217	* inputs - pointer to client
218	* output - NONE
219	* side effects - display to client what we support (for them)
220	*/
221	void
222	isupport_show(struct Client *source_p)
223	{
224	const dlink_node *node = NULL;
225
226	DLINK_FOREACH(node, isupport_list_lines.head)
227	sendto_one_numeric(source_p, &me, RPL_ISUPPORT, node->data);
228	}