solanum/modules/m_dline.c

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/*
* ircd-ratbox: A slightly useful ircd.
* m_dline.c: Bans/unbans a user.
*
* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
* Copyright (C) 1996-2002 Hybrid Development Team
* Copyright (C) 2002-2005 ircd-ratbox 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*/
#include "stdinc.h"
#include "channel.h"
#include "class.h"
#include "client.h"
#include "match.h"
#include "ircd.h"
#include "hostmask.h"
#include "numeric.h"
#include "s_conf.h"
#include "s_newconf.h"
#include "logger.h"
#include "send.h"
#include "hash.h"
#include "s_serv.h"
#include "msg.h"
#include "parse.h"
#include "modules.h"
#include "bandbi.h"
#include "operhash.h"
static const char dline_desc[] = "Provides the DLINE facility to ban users via IP address";
static void mo_dline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void me_dline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void mo_undline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
static void me_undline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
struct Message dline_msgtab = {
"DLINE", 0, 0, 0, 0,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_dline, 4}, {mo_dline, 2}}
};
struct Message undline_msgtab = {
"UNDLINE", 0, 0, 0, 0,
{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_undline, 2}, {mo_undline, 2}}
};
mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL };
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DECLARE_MODULE_AV2(dline, NULL, NULL, dline_clist, NULL, NULL, NULL, NULL, dline_desc);
static bool remove_temp_dline(struct ConfItem *);
static void apply_dline(struct Client *, const char *, int, char *);
static void apply_undline(struct Client *, const char *);
/* mo_dline()
*
* parv[1] - dline to add
* parv[2] - reason
*/
static void
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mo_dline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
char def[] = "No Reason";
const char *dlhost;
char *reason = def;
int tdline_time = 0;
const char *target_server = NULL;
int loc = 1;
if(!IsOperK(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kline");
return;
}
if((tdline_time = valid_temp_time(parv[loc])) >= 0)
loc++;
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if (loc >= parc)
{
sendto_one_notice(source_p, ":Need an IP to D-Line");
return;
}
dlhost = parv[loc];
loc++;
/* would break the protocol */
if (*dlhost == ':')
{
sendto_one_notice(source_p, ":Invalid D-Line [%s] - IP cannot start with :", dlhost);
return;
}
int ty = parse_netmask_strict(dlhost, NULL, NULL);
if (ty != HM_IPV4 && ty != HM_IPV6)
{
sendto_one_notice(source_p, ":Invalid D-Line [%s] - doesn't look like IP[/cidr]", dlhost);
return;
}
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;
}
target_server = parv[loc + 1];
loc += 2;
}
if(parc >= loc + 1 && !EmptyString(parv[loc]))
reason = LOCAL_COPY(parv[loc]);
if(target_server != NULL)
{
sendto_match_servs(source_p, target_server,
CAP_ENCAP, NOCAPS,
"ENCAP %s DLINE %d %s :%s",
target_server, tdline_time, dlhost, reason);
if(!match(target_server, me.name))
return;
}
apply_dline(source_p, dlhost, tdline_time, reason);
check_dlines();
}
/* mo_undline()
*
* parv[1] = dline to remove
*/
static void
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mo_undline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
{
const char *cidr;
const char *target_server = NULL;
if(!IsOperK(source_p))
{
sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "unkline");
return;
}
cidr = parv[1];
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;
}
target_server = parv[3];
sendto_match_servs(source_p, target_server,
CAP_ENCAP, NOCAPS, "ENCAP %s UNDLINE %s", target_server, cidr);
if(!match(target_server, me.name))
return;
}
apply_undline(source_p, cidr);
}
static void
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me_dline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char **parv)
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{
int tdline_time = atoi(parv[1]);
/* Since this is coming over a server link, assume that the originating
* server did the relevant permission/sanity checks...
*/
if(!IsPerson(source_p))
return;
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apply_dline(source_p, parv[2], tdline_time, LOCAL_COPY(parv[3]));
check_dlines();
}
static void
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me_undline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char **parv)
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{
if(!IsPerson(source_p))
return;
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apply_undline(source_p, parv[1]);
}
static void
apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *reason)
{
struct ConfItem *aconf;
char *oper_reason;
struct rb_sockaddr_storage daddr;
int t = AF_INET, ty, b;
const char *creason;
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ty = parse_netmask_strict(dlhost, &daddr, &b);
if(ty != HM_IPV4 && ty != HM_IPV6)
{
sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name);
return;
}
if(ty == HM_IPV6)
t = AF_INET6;
else
t = AF_INET;
/* This means dlines wider than /16 cannot be set remotely */
if(IsOperAdmin(source_p))
{
if(b < 8)
{
sendto_one_notice(source_p,
":For safety, bitmasks less than 8 require conf access.");
return;
}
}
else
{
if(b < 16)
{
sendto_one_notice(source_p,
":Dline bitmasks less than 16 are for admins only.");
return;
}
}
if(ConfigFileEntry.non_redundant_klines)
{
if((aconf = find_dline((struct sockaddr *) &daddr, t)) != NULL)
{
int bx;
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int masktype = parse_netmask_strict(aconf->host, NULL, &bx);
if (masktype != HM_ERROR && b >= bx)
{
creason = aconf->passwd ? aconf->passwd : "<No Reason>";
if(IsConfExemptKline(aconf))
sendto_one(source_p,
":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
me.name, source_p->name, dlhost, aconf->host,
creason);
else
sendto_one(source_p,
":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
me.name, source_p->name, dlhost, aconf->host,
creason);
return;
}
}
}
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rb_set_time();
aconf = make_conf();
aconf->status = CONF_DLINE;
aconf->created = rb_current_time();
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aconf->host = rb_strdup(dlhost);
aconf->passwd = rb_strdup(reason);
aconf->info.oper = operhash_add(get_oper_name(source_p));
if(strlen(reason) > BANREASONLEN)
reason[BANREASONLEN] = '\0';
/* Look for an oper reason */
if((oper_reason = strchr(reason, '|')) != NULL)
{
*oper_reason = '\0';
oper_reason++;
if(!EmptyString(oper_reason))
aconf->spasswd = rb_strdup(oper_reason);
}
if(tdline_time > 0)
{
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aconf->hold = rb_current_time() + tdline_time;
add_temp_dline(aconf);
if(EmptyString(oper_reason))
{
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"%s added temporary %d min. D-Line for [%s] [%s]",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason);
ilog(L_KLINE, "D %s %d %s %s",
get_oper_name(source_p), tdline_time / 60, aconf->host, reason);
}
else
{
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"%s added temporary %d min. D-Line for [%s] [%s|%s]",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason, oper_reason);
ilog(L_KLINE, "D %s %d %s %s|%s",
get_oper_name(source_p), tdline_time / 60,
aconf->host, reason, oper_reason);
}
sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]",
me.name, source_p->name, tdline_time / 60, aconf->host);
}
else
{
add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf);
bandb_add(BANDB_DLINE, source_p, aconf->host, NULL,
reason, EmptyString(aconf->spasswd) ? NULL : aconf->spasswd, 0);
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if(EmptyString(oper_reason))
{
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
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"%s added D-Line for [%s] [%s]",
get_oper_name(source_p), aconf->host, reason);
ilog(L_KLINE, "D %s 0 %s %s",
get_oper_name(source_p), aconf->host, reason);
}
else
{
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
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"%s added D-Line for [%s] [%s|%s]",
get_oper_name(source_p), aconf->host, reason, oper_reason);
ilog(L_KLINE, "D %s 0 %s %s|%s",
get_oper_name(source_p),
aconf->host, reason, oper_reason);
}
}
}
static void
apply_undline(struct Client *source_p, const char *cidr)
{
char buf[BUFSIZE];
struct ConfItem *aconf;
int masktype = parse_netmask(cidr, NULL, NULL);
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if(masktype != HM_IPV4 && masktype != HM_IPV6)
{
sendto_one_notice(source_p, ":Invalid D-Line [%s] - doesn't look like IP[/cidr]", cidr);
return;
}
aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL);
if(aconf == NULL)
{
sendto_one_notice(source_p, ":No D-Line for %s", cidr);
return;
}
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rb_strlcpy(buf, aconf->host, sizeof buf);
if(remove_temp_dline(aconf))
{
sendto_one(source_p,
":%s NOTICE %s :Un-dlined [%s] from temporary D-lines",
me.name, source_p->name, buf);
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
"%s has removed the temporary D-Line for: [%s]",
get_oper_name(source_p), buf);
ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf);
return;
}
bandb_del(BANDB_DLINE, aconf->host, NULL);
sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, source_p->name,
aconf->host);
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, "%s has removed the D-Line for: [%s]",
get_oper_name(source_p), aconf->host);
ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host);
delete_one_address_conf(aconf->host, aconf);
}
/* remove_temp_dline()
*
* inputs - confitem to undline
* outputs - true if removed, false otherwise.
* side effects - tries to undline anything that matches
*/
static bool
remove_temp_dline(struct ConfItem *aconf)
{
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rb_dlink_node *ptr;
int i;
for(i = 0; i < LAST_TEMP_TYPE; i++)
{
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RB_DLINK_FOREACH(ptr, temp_dlines[i].head)
{
if(aconf == ptr->data)
{
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rb_dlinkDestroy(ptr, &temp_dlines[i]);
delete_one_address_conf(aconf->host, aconf);
return true;
}
}
}
return false;
}