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elemental-ircd/modules/m_xline.c

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/* modules/m_xline.c
*
* Copyright (C) 2002-2003 Lee Hardy <lee@leeh.co.uk>
* Copyright (C) 2002-2005 ircd-ratbox development team
*
* 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.
*
* $Id$
*/
#include "stdinc.h"
#include "send.h"
#include "channel.h"
#include "client.h"
#include "common.h"
#include "config.h"
#include "class.h"
#include "ircd.h"
#include "numeric.h"
#include "logger.h"
#include "s_serv.h"
#include "whowas.h"
#include "match.h"
#include "hash.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "reject.h"
#include "bandbi.h"
#include "operhash.h"
static int mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
static int ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
static int me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
static int mo_unxline(struct Client *client_p, struct Client *source_p, int parc,
const char *parv[]);
static int ms_unxline(struct Client *client_p, struct Client *source_p, int parc,
const char *parv[]);
static int me_unxline(struct Client *client_p, struct Client *source_p, int parc,
const char *parv[]);
struct Message xline_msgtab = {
"XLINE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, {ms_xline, 5}, {ms_xline, 5}, {me_xline, 5}, {mo_xline, 3}}
};
struct Message unxline_msgtab = {
"UNXLINE", 0, 0, 0, MFLG_SLOW,
{mg_unreg, mg_not_oper, {ms_unxline, 3}, {ms_unxline, 3}, {me_unxline, 2}, {mo_unxline, 2}}
};
mapi_clist_av1 xline_clist[] = { &xline_msgtab, &unxline_msgtab, NULL };
DECLARE_MODULE_AV1(xline, NULL, NULL, xline_clist, NULL, NULL, "$Revision$");
static int valid_xline(struct Client *, const char *, const char *);
static void apply_xline(struct Client *client_p, const char *name,
const char *reason, int temp_time, int propagated);
static void propagate_xline(struct Client *source_p, const char *target,
int temp_time, const char *name, const char *type, const char *reason);
static void cluster_xline(struct Client *source_p, int temp_time,
const char *name, const char *reason);
static void handle_remote_xline(struct Client *source_p, int temp_time,
const char *name, const char *reason);
static void handle_remote_unxline(struct Client *source_p, const char *name);
static void remove_xline(struct Client *source_p, const char *name,
int propagated);
/* m_xline()
*
* parv[1] - thing to xline
* parv[2] - optional type/reason
* parv[3] - reason
*/
static int
mo_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
struct ConfItem *aconf;
const char *name;
const char *reason;
const char *target_server = NULL;
int temp_time;
int loc = 1;
int propagated = ConfigFileEntry.use_propagated_bans;
if(!IsOperXline(source_p)) {
sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
return 0;
}
if((temp_time = valid_temp_time(parv[loc])) >= 0)
loc++;
/* we just set temp_time to -1! */
else
temp_time = 0;
name = parv[loc];
loc++;
/* XLINE <gecos> ON <server> :<reason> */
if(parc >= loc + 2 && !irccmp(parv[loc], "ON")) {
if(!IsOperRemoteBan(source_p)) {
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "remoteban");
return 0;
}
target_server = parv[loc + 1];
loc += 2;
}
if(parc <= loc || EmptyString(parv[loc])) {
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
me.name, source_p->name, "XLINE");
return 0;
}
reason = parv[loc];
if(target_server != NULL) {
propagate_xline(source_p, target_server, temp_time, name, "2", reason);
if(!match(target_server, me.name))
return 0;
/* Set as local-only. */
propagated = 0;
} else if(!propagated && rb_dlink_list_length(&cluster_conf_list) > 0)
cluster_xline(source_p, temp_time, name, reason);
if((aconf = find_xline_mask(name)) != NULL) {
sendto_one(source_p, ":%s NOTICE %s :[%s] already X-Lined by [%s] - %s",
me.name, source_p->name, name, aconf->host, aconf->passwd);
return 0;
}
if(!valid_xline(source_p, name, reason))
return 0;
if(propagated && temp_time == 0) {
sendto_one_notice(source_p, ":Cannot set a permanent global ban");
return 0;
}
apply_xline(source_p, name, reason, temp_time, propagated);
return 0;
}
/* ms_xline()
*
* handles a remote xline
*/
static int
ms_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
/* parv[0] parv[1] parv[2] parv[3] parv[4]
* oper target serv xline type reason
*/
propagate_xline(source_p, parv[1], 0, parv[2], parv[3], parv[4]);
if(!IsPerson(source_p))
return 0;
/* destined for me? */
if(!match(parv[1], me.name))
return 0;
handle_remote_xline(source_p, 0, parv[2], parv[4]);
return 0;
}
static int
me_xline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
/* time name type :reason */
if(!IsPerson(source_p))
return 0;
handle_remote_xline(source_p, atoi(parv[1]), parv[2], parv[4]);
return 0;
}
static void
handle_remote_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
{
struct ConfItem *aconf;
if(!find_shared_conf(source_p->username, source_p->host,
source_p->servptr->name,
(temp_time > 0) ? SHARED_TXLINE : SHARED_PXLINE))
return;
if(!valid_xline(source_p, name, reason))
return;
/* already xlined */
if((aconf = find_xline_mask(name)) != NULL) {
sendto_one_notice(source_p, ":[%s] already X-Lined by [%s] - %s", name, aconf->host,
aconf->passwd);
return;
}
apply_xline(source_p, name, reason, temp_time, 0);
}
/* valid_xline()
*
* inputs - client xlining, gecos, reason and whether to warn
* outputs -
* side effects - checks the xline for validity, erroring if needed
*/
static int
valid_xline(struct Client *source_p, const char *gecos, const char *reason)
{
if(EmptyString(reason)) {
sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
get_id(&me, source_p), get_id(source_p, source_p), "XLINE");
return 0;
}
if(strchr(reason, ':') != NULL) {
sendto_one_notice(source_p, ":Invalid character ':' in comment");
return 0;
}
if(strchr(reason, '"')) {
sendto_one_notice(source_p, ":Invalid character '\"' in comment");
return 0;
}
if(!valid_wild_card_simple(gecos)) {
sendto_one_notice(source_p,
":Please include at least %d non-wildcard "
"characters with the xline",
ConfigFileEntry.min_nonwildcard_simple);
return 0;
}
return 1;
}
void
apply_xline(struct Client *source_p, const char *name, const char *reason, int temp_time, int propagated)
{
struct ConfItem *aconf;
aconf = make_conf();
aconf->status = CONF_XLINE;
aconf->created = rb_current_time();
aconf->host = rb_strdup(name);
aconf->passwd = rb_strdup(reason);
collapse(aconf->host);
aconf->info.oper = operhash_add(get_oper_name(source_p));
if(propagated) {
aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
aconf->hold = rb_current_time() + temp_time;
aconf->lifetime = aconf->hold;
replace_old_ban(aconf);
rb_dlinkAddAlloc(aconf, &prop_bans);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s added global %d min. X-Line for [%s] [%s]",
get_oper_name(source_p), temp_time / 60,
aconf->host, reason);
ilog(L_KLINE, "X %s %d %s %s",
get_oper_name(source_p), temp_time / 60, name, reason);
sendto_one_notice(source_p, ":Added global %d min. X-Line [%s]",
temp_time / 60, aconf->host);
sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
":%s BAN X * %s %lu %d %d * :%s",
source_p->id, aconf->host,
(unsigned long)aconf->created,
(int)(aconf->hold - aconf->created),
(int)(aconf->lifetime - aconf->created),
reason);
} else if(temp_time > 0) {
aconf->hold = rb_current_time() + temp_time;
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s added temporary %d min. X-Line for [%s] [%s]",
get_oper_name(source_p), temp_time / 60,
aconf->host, reason);
ilog(L_KLINE, "X %s %d %s %s",
get_oper_name(source_p), temp_time / 60, name, reason);
sendto_one_notice(source_p, ":Added temporary %d min. X-Line [%s]",
temp_time / 60, aconf->host);
} else {
sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s added X-Line for [%s] [%s]",
get_oper_name(source_p), aconf->host, aconf->passwd);
sendto_one_notice(source_p, ":Added X-Line for [%s] [%s]",
aconf->host, aconf->passwd);
bandb_add(BANDB_XLINE, source_p, aconf->host, NULL, aconf->passwd, NULL, 0);
ilog(L_KLINE, "X %s 0 %s %s", get_oper_name(source_p), name, aconf->passwd);
}
rb_dlinkAddAlloc(aconf, &xline_conf_list);
check_xlines();
}
static void
propagate_xline(struct Client *source_p, const char *target,
int temp_time, const char *name, const char *type, const char *reason)
{
if(!temp_time) {
sendto_match_servs(source_p, target, CAP_CLUSTER, NOCAPS,
"XLINE %s %s %s :%s", target, name, type, reason);
sendto_match_servs(source_p, target, CAP_ENCAP, CAP_CLUSTER,
"ENCAP %s XLINE %d %s 2 :%s", target, temp_time, name, reason);
} else
sendto_match_servs(source_p, target, CAP_ENCAP, NOCAPS,
"ENCAP %s XLINE %d %s %s :%s",
target, temp_time, name, type, reason);
}
static void
cluster_xline(struct Client *source_p, int temp_time, const char *name, const char *reason)
{
struct remote_conf *shared_p;
rb_dlink_node *ptr;
RB_DLINK_FOREACH(ptr, cluster_conf_list.head) {
shared_p = ptr->data;
/* old protocol cant handle temps, and we dont really want
* to convert them to perm.. --fl
*/
if(!temp_time) {
if(!(shared_p->flags & SHARED_PXLINE))
continue;
sendto_match_servs(source_p, shared_p->server, CAP_CLUSTER, NOCAPS,
"XLINE %s %s 2 :%s", shared_p->server, name, reason);
sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, CAP_CLUSTER,
"ENCAP %s XLINE 0 %s 2 :%s",
shared_p->server, name, reason);
} else if(shared_p->flags & SHARED_TXLINE)
sendto_match_servs(source_p, shared_p->server, CAP_ENCAP, NOCAPS,
"ENCAP %s XLINE %d %s 2 :%s",
shared_p->server, temp_time, name, reason);
}
}
/* mo_unxline()
*
* parv[1] - thing to unxline
*/
static int
mo_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
int propagated = 1;
if(!IsOperXline(source_p)) {
sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "xline");
return 0;
}
if(parc == 4 && !(irccmp(parv[2], "ON"))) {
if(!IsOperRemoteBan(source_p)) {
sendto_one(source_p, form_str(ERR_NOPRIVS),
me.name, source_p->name, "remoteban");
return 0;
}
propagate_generic(source_p, "UNXLINE", parv[3], CAP_CLUSTER, "%s", parv[1]);
if(match(parv[3], me.name) == 0)
return 0;
propagated = 0;
}
/* cluster{} moved to remove_xline */
remove_xline(source_p, parv[1], propagated);
return 0;
}
/* ms_unxline()
*
* handles a remote unxline
*/
static int
ms_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
/* parv[0] parv[1] parv[2]
* oper target server gecos
*/
propagate_generic(source_p, "UNXLINE", parv[1], CAP_CLUSTER, "%s", parv[2]);
if(!match(parv[1], me.name))
return 0;
if(!IsPerson(source_p))
return 0;
handle_remote_unxline(source_p, parv[2]);
return 0;
}
static int
me_unxline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
/* name */
if(!IsPerson(source_p))
return 0;
handle_remote_unxline(source_p, parv[1]);
return 0;
}
static void
handle_remote_unxline(struct Client *source_p, const char *name)
{
if(!find_shared_conf(source_p->username, source_p->host,
source_p->servptr->name, SHARED_UNXLINE))
return;
remove_xline(source_p, name, 0);
return;
}
static void
remove_xline(struct Client *source_p, const char *name, int propagated)
{
struct ConfItem *aconf;
rb_dlink_node *ptr;
RB_DLINK_FOREACH(ptr, xline_conf_list.head) {
aconf = ptr->data;
if(!irccmp(aconf->host, name)) {
if(aconf->lifetime) {
if(!propagated) {
sendto_one_notice(source_p, ":Cannot remove global X-Line %s on specific servers", name);
return;
}
ptr = rb_dlinkFind(aconf, &prop_bans);
if(ptr == NULL)
return;
sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s has removed the global X-Line for: [%s]",
get_oper_name(source_p), name);
ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
if(aconf->created < rb_current_time())
aconf->created = rb_current_time();
else
aconf->created++;
aconf->hold = aconf->created;
operhash_delete(aconf->info.oper);
aconf->info.oper = operhash_add(get_oper_name(source_p));
aconf->flags |= CONF_FLAGS_MYOPER | CONF_FLAGS_TEMPORARY;
sendto_server(NULL, NULL, CAP_BAN|CAP_TS6, NOCAPS,
":%s BAN X * %s %lu %d %d * :*",
source_p->id, aconf->host,
(unsigned long)aconf->created,
0,
(int)(aconf->lifetime - aconf->created));
remove_reject_mask(aconf->host, NULL);
deactivate_conf(aconf, ptr);
return;
} else if(propagated && rb_dlink_list_length(&cluster_conf_list))
cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
if(!aconf->hold) {
bandb_del(BANDB_XLINE, aconf->host, NULL);
sendto_one_notice(source_p, ":X-Line for [%s] is removed", aconf->host);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s has removed the X-Line for: [%s]",
get_oper_name(source_p), aconf->host);
ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), aconf->host);
} else {
sendto_one_notice(source_p, ":X-Line for [%s] is removed", name);
sendto_realops_snomask(SNO_GENERAL, L_ALL,
"%s has removed the temporary X-Line for: [%s]",
get_oper_name(source_p), name);
ilog(L_KLINE, "UX %s %s", get_oper_name(source_p), name);
}
remove_reject_mask(aconf->host, NULL);
free_conf(aconf);
rb_dlinkDestroy(ptr, &xline_conf_list);
return;
}
}
if(propagated && rb_dlink_list_length(&cluster_conf_list))
cluster_generic(source_p, "UNXLINE", SHARED_UNXLINE, CAP_CLUSTER, "%s", name);
sendto_one_notice(source_p, ":No X-Line for %s", name);
return;
}
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