solanum/ircd/supported.c

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/*
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* Solanum: a slightly advanced ircd
* supported.c: isupport (005) numeric
*
* Copyright (C) 2006 Jilles Tjoelker
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1.Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2.Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3.The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
/* From the old supported.h which is
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2004 ircd-ratbox development team
*/
/*
* - from mirc's versions.txt
*
* mIRC now supports the numeric 005 tokens: CHANTYPES=# and
* PREFIX=(ohv)@%+ and can handle a dynamic set of channel and
* nick prefixes.
*
* mIRC assumes that @ is supported on all networks, any mode
* left of @ is assumed to have at least equal power to @, and
* any mode right of @ has less power.
*
* mIRC has internal support for @%+ modes.
*
* $nick() can now handle all mode letters listed in PREFIX.
*
* Also added support for CHANMODES=A,B,C,D token (not currently
* supported by any servers), which lists all modes supported
* by a channel, where:
*
* A = modes that take a parameter, and add or remove nicks
* or addresses to a list, such as +bIe for the ban,
* invite, and exception lists.
*
* B = modes that change channel settings, but which take
* a parameter when they are set and unset, such as
* +k key, and -k key.
*
* C = modes that change channel settings, but which take
* a parameter only when they are set, such as +l N,
* and -l.
*
* D = modes that change channel settings, such as +imnpst
* and take no parameters.
*
* All unknown/unlisted modes are treated as type D.
*/
#include "stdinc.h"
#include "client.h"
#include "numeric.h"
#include "ircd.h"
#include "s_conf.h"
#include "s_user.h"
#include "supported.h"
#include "chmode.h"
#include "send.h"
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static char allowed_chantypes[BUFSIZE];
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rb_dlink_list isupportlist;
struct isupportitem
{
const char *name;
const char *(*func)(const void *);
const void *param;
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rb_dlink_node node;
};
void
add_isupport(const char *name, const char *(*func)(const void *), const void *param)
{
struct isupportitem *item;
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item = rb_malloc(sizeof(struct isupportitem));
item->name = name;
item->func = func;
item->param = param;
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rb_dlinkAddTail(item, &item->node, &isupportlist);
}
const void *
change_isupport(const char *name, const char *(*func)(const void *), const void *param)
{
rb_dlink_node *ptr;
struct isupportitem *item;
const void *oldvalue = NULL;
RB_DLINK_FOREACH(ptr, isupportlist.head)
{
item = ptr->data;
if (!strcmp(item->name, name))
{
oldvalue = item->param;
// item->name = name;
item->func = func;
item->param = param;
break;
}
}
return oldvalue;
}
void
delete_isupport(const char *name)
{
rb_dlink_node *ptr, *next_ptr;
struct isupportitem *item;
RB_DLINK_FOREACH_SAFE(ptr, next_ptr, isupportlist.head)
{
item = ptr->data;
if (!strcmp(item->name, name))
{
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rb_dlinkDelete(ptr, &isupportlist);
rb_free(item);
}
}
}
/* XXX caching? */
void
show_isupport(struct Client *client_p)
{
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rb_dlink_node *ptr;
struct isupportitem *item;
const char *value;
char buf[512];
int extra_space;
unsigned int nchars, nparams;
int l;
extra_space = strlen(client_p->name);
/* UID */
if (!MyClient(client_p) && extra_space < 9)
extra_space = 9;
/* :<me.name> 005 <nick> <params> :are supported by this server */
/* form_str(RPL_ISUPPORT) is %s :are supported by this server */
extra_space += strlen(me.name) + 1 + strlen(form_str(RPL_ISUPPORT));
nchars = extra_space, nparams = 0, buf[0] = '\0';
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RB_DLINK_FOREACH(ptr, isupportlist.head)
{
item = ptr->data;
value = (*item->func)(item->param);
if (value == NULL)
continue;
l = strlen(item->name) + (EmptyString(value) ? 0 : 1 + strlen(value));
if (nchars + l + (nparams > 0) >= sizeof buf || nparams + 1 > 12)
{
sendto_one_numeric(client_p, RPL_ISUPPORT, form_str(RPL_ISUPPORT), buf);
nchars = extra_space, nparams = 0, buf[0] = '\0';
}
if (nparams > 0)
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rb_strlcat(buf, " ", sizeof buf), nchars++;
rb_strlcat(buf, item->name, sizeof buf);
if (!EmptyString(value))
{
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rb_strlcat(buf, "=", sizeof buf);
rb_strlcat(buf, value, sizeof buf);
}
nchars += l;
nparams++;
}
if (nparams > 0)
sendto_one_numeric(client_p, RPL_ISUPPORT, form_str(RPL_ISUPPORT), buf);
}
const char *
isupport_intptr(const void *ptr)
{
static char buf[15];
snprintf(buf, sizeof buf, "%d", *(const int *)ptr);
return buf;
}
const char *
isupport_boolean(const void *ptr)
{
return *(const int *)ptr ? "" : NULL;
}
const char *
isupport_string(const void *ptr)
{
return (const char *)ptr;
}
const char *
isupport_stringptr(const void *ptr)
{
return *(char * const *)ptr;
}
const char *
isupport_umode(const void *ptr)
{
const char *str;
str = ptr;
return ConfigFileEntry.oper_only_umodes &
user_modes[(unsigned char)*str] ? NULL : str;
}
static const char *
isupport_chanmodes(const void *ptr)
{
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static char result[300];
snprintf(result, sizeof result, "%s%sbq,k,%slj,%s",
ConfigChannel.use_except ? "e" : "",
ConfigChannel.use_invex ? "I" : "",
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ConfigChannel.use_forward ? "f" : "",
cflagsbuf);
return result;
}
static const char *
isupport_chanlimit(const void *ptr)
{
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static char result[BUFSIZE + 30];
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snprintf(result, sizeof result, "%s:%i", allowed_chantypes, ConfigChannel.max_chans_per_user);
return result;
}
static const char *
isupport_maxlist(const void *ptr)
{
static char result[30];
snprintf(result, sizeof result, "bq%s%s:%i",
ConfigChannel.use_except ? "e" : "",
ConfigChannel.use_invex ? "I" : "",
ConfigChannel.max_bans);
return result;
}
static const char *
isupport_targmax(const void *ptr)
{
static char result[200];
snprintf(result, sizeof result, "NAMES:1,LIST:1,KICK:1,WHOIS:1,PRIVMSG:%d,NOTICE:%d,ACCEPT:,MONITOR:",
ConfigFileEntry.max_targets,
ConfigFileEntry.max_targets);
return result;
}
static const char *
isupport_extban(const void *ptr)
{
const char *p;
static char result[200];
p = get_extban_string();
if (EmptyString(p))
return NULL;
snprintf(result, sizeof result, "$,%s", p);
return result;
}
static const char *
isupport_nicklen(const void *ptr)
{
static char result[200];
snprintf(result, sizeof result, "%u", ConfigFileEntry.nicklen - 1);
return result;
}
void
init_isupport(void)
{
static int maxmodes = MAXMODEPARAMS;
static int channellen = LOC_CHANNELLEN;
static int topiclen = TOPICLEN;
static int maxnicklen = NICKLEN - 1;
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add_isupport("CHANTYPES", isupport_string, allowed_chantypes);
add_isupport("EXCEPTS", isupport_boolean, &ConfigChannel.use_except);
add_isupport("INVEX", isupport_boolean, &ConfigChannel.use_invex);
add_isupport("CHANMODES", isupport_chanmodes, NULL);
add_isupport("CHANLIMIT", isupport_chanlimit, NULL);
add_isupport("PREFIX", isupport_string, "(ov)@+");
add_isupport("MAXLIST", isupport_maxlist, NULL);
add_isupport("MODES", isupport_intptr, &maxmodes);
add_isupport("NETWORK", isupport_stringptr, &ServerInfo.network_name);
add_isupport("STATUSMSG", isupport_string, "@+");
add_isupport("CASEMAPPING", isupport_string, "rfc1459");
add_isupport("NICKLEN", isupport_nicklen, NULL);
add_isupport("MAXNICKLEN", isupport_intptr, &maxnicklen);
add_isupport("CHANNELLEN", isupport_intptr, &channellen);
add_isupport("TOPICLEN", isupport_intptr, &topiclen);
add_isupport("DEAF", isupport_umode, "D");
add_isupport("TARGMAX", isupport_targmax, NULL);
add_isupport("EXTBAN", isupport_extban, NULL);
}
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void
chantypes_update(void)
{
unsigned char *p;
memset(allowed_chantypes, '\0', sizeof allowed_chantypes);
p = (unsigned char *) allowed_chantypes;
for (unsigned int i = 0; i < 256; i++)
{
if (IsChanPrefix(i))
*p++ = (unsigned char) i;
}
}