trunk/src/isupport.c

/*
 *  ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
 *
 *  Copyright (c) 1997-2017 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_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:	7924
Committed:	Sat Dec 31 13:57:08 2016 UTC (8 years, 7 months ago) by michael
Content type:	text/x-csrc
File size:	5233 byte(s)
Log Message:	- Update copyright years
#	User	Rev	Content
1	michael	6185	/*
2			* ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3			*
4	michael	7924	* Copyright (c) 1997-2017 ircd-hybrid development team
5	michael	6185	*
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_mode.h"
38			#include "parse.h"
39
40
41			/* Used for building up the isupport string,
42			* used with init_isupport, add_isupport, delete_isupport
43			*/
44			struct Isupport
45			{
46			dlink_node node;
47			char *name;
48			char *options;
49			int number;
50			};
51
52			static dlink_list isupport_list;
53			static dlink_list isupport_list_lines;
54
55			/*
56			* isupport_init()
57			*
58			* input - NONE
59			* output - NONE
60			* side effects - Must be called before isupport is enabled
61			*/
62			void
63			isupport_init(void)
64			{
65			isupport_add("CALLERID", NULL, -1);
66	michael	6824	isupport_add("CASEMAPPING", "ascii", -1);
67	michael	6185	isupport_add("DEAF", "D", -1);
68			isupport_add("KICKLEN", NULL, KICKLEN);
69			isupport_add("MODES", NULL, MAXMODEPARAMS);
70	michael	6904	isupport_add("PREFIX", "(ohv)" CMEMBER_STATUS_FLAGS, -1);
71			isupport_add("STATUSMSG", CMEMBER_STATUS_FLAGS, -1);
72	michael	6185	isupport_add("EXCEPTS", NULL, -1);
73			isupport_add("INVEX", NULL, -1);
74			}
75
76			/*
77			* isupport_add()
78			*
79			* input - name of supported function
80			* - options if any
81			* - number if any
82			* output - NONE
83			* side effects - Each supported item must call this when activated
84			*/
85			void
86			isupport_add(const char name, const char options, int n)
87			{
88			dlink_node *node = NULL;
89			struct Isupport *support = NULL;
90
91			DLINK_FOREACH(node, isupport_list.head)
92			{
93			support = node->data;
94			if (irccmp(support->name, name) == 0)
95			{
96	michael	7032	xfree(support->name);
97			xfree(support->options);
98	michael	6185	break;
99			}
100			}
101
102			if (node == NULL)
103			{
104	michael	7032	support = xcalloc(sizeof(*support));
105	michael	6185	dlinkAddTail(support, &support->node, &isupport_list);
106			}
107
108			support->name = xstrdup(name);
109			if (options)
110			support->options = xstrdup(options);
111			support->number = n;
112
113			isupport_rebuild();
114			}
115
116			/*
117			* isupport_delete()
118			*
119			* input - name of supported function
120			* output - NONE
121			* side effects - Each supported item must call this when deactivated
122			*/
123			void
124			isupport_delete(const char *name)
125			{
126			dlink_node *node = NULL;
127
128			DLINK_FOREACH(node, isupport_list.head)
129			{
130			struct Isupport *support = node->data;
131
132			if (irccmp(support->name, name) == 0)
133			{
134			dlinkDelete(node, &isupport_list);
135	michael	7032	xfree(support->name);
136			xfree(support->options);
137			xfree(support);
138	michael	6185	break;
139			}
140			}
141
142			isupport_rebuild();
143			}
144
145			/*
146			* issuport_rebuild()
147			*
148			* input - NONE
149			* output - NONE
150			* side effects - Destroy the isupport MessageFile lines, and rebuild.
151			*/
152			void
153			isupport_rebuild(void)
154			{
155			char isupportbuffer[IRCD_BUFSIZE];
156			char *p = isupportbuffer;
157			dlink_node node = NULL, node_next = NULL;
158			int n = 0;
159			int tokens = 0;
160			size_t len = 0;
161			size_t reserve = strlen(me.name) + HOSTLEN + strlen(numeric_form(RPL_ISUPPORT));
162
163			DLINK_FOREACH_SAFE(node, node_next, isupport_list_lines.head)
164			{
165			dlinkDelete(node, &isupport_list_lines);
166	michael	7032	xfree(node->data);
167	michael	6185	free_dlink_node(node);
168			}
169
170			DLINK_FOREACH(node, isupport_list.head)
171			{
172			struct Isupport *support = node->data;
173
174			p += (n = sprintf(p, "%s", support->name));
175			len += n;
176
177			if (support->options)
178			{
179			p += (n = sprintf(p, "=%s", support->options));
180			len += n;
181			}
182
183			if (support->number > 0)
184			{
185			p += (n = sprintf(p, "=%d", support->number));
186			len += n;
187			}
188
189			*p++ = ' ';
190			len++;
191			*p = '\0';
192
193			if (++tokens == (MAXPARA-2) \|\| len >= (sizeof(isupportbuffer)-reserve))
194			{ /* arbritrary for now */
195			if (*--p == ' ')
196			*p = '\0';
197
198			dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &isupport_list_lines);
199			p = isupportbuffer;
200			len = 0;
201	michael	6193	n = 0;
202			tokens = 0;
203	michael	6185	}
204			}
205
206			if (len)
207			{
208			if (*--p == ' ')
209			*p = '\0';
210			dlinkAddTail(xstrdup(isupportbuffer), make_dlink_node(), &isupport_list_lines);
211			}
212			}
213
214			/* isupport_show()
215			*
216			* inputs - pointer to client
217			* output - NONE
218			* side effects - display to client what we support (for them)
219			*/
220			void
221			isupport_show(struct Client *source_p)
222			{
223			const dlink_node *node = NULL;
224
225			DLINK_FOREACH(node, isupport_list_lines.head)
226			sendto_one_numeric(source_p, &me, RPL_ISUPPORT, node->data);
227			}