780 lines
19 KiB
C
780 lines
19 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_kline.c: Bans/unbans a user.
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*
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* Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center
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* Copyright (C) 1996-2002 Hybrid Development Team
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* Copyright (C) 2002-2012 ircd-ratbox development team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*
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* $Id: m_kline.c 27371 2012-03-16 05:33:15Z dubkat $
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*/
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#include "stdinc.h"
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#include "struct.h"
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#include "client.h"
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#include "match.h"
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#include "ircd.h"
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#include "hostmask.h"
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#include "numeric.h"
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#include "s_conf.h"
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#include "s_newconf.h"
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#include "s_log.h"
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#include "send.h"
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#include "s_serv.h"
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#include "parse.h"
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#include "modules.h"
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#include "operhash.h"
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#include "bandbi.h"
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static int mo_kline(struct Client *, struct Client *, int, const char **);
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static int me_kline(struct Client *, struct Client *, int, const char **);
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static int mo_adminkline(struct Client *, struct Client *, int, const char **);
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static int mo_unkline(struct Client *, struct Client *, int, const char **);
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static int me_unkline(struct Client *, struct Client *, int, const char **);
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struct Message kline_msgtab = {
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"KLINE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_kline, 5}, {mo_kline, 3}}
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};
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struct Message adminkline_msgtab = {
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"ADMINKLINE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_adminkline, 3}}
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};
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struct Message unkline_msgtab = {
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"UNKLINE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_unkline, 3}, {mo_unkline, 2}}
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};
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mapi_clist_av1 kline_clist[] = { &kline_msgtab, &unkline_msgtab, &adminkline_msgtab, NULL };
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DECLARE_MODULE_AV1(kline, NULL, NULL, kline_clist, NULL, NULL, "$Revision: 27371 $");
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/* Local function prototypes */
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static int find_user_host(struct Client *source_p, const char *userhost, char *user, char *host);
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static int valid_user_host(struct Client *source_p, const char *user, const char *host);
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static int valid_wild_card(struct Client *source_p, const char *user, const char *host);
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static void set_kline(struct Client *source_p, const char *user, const char *host,
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const char *lreason, int tkline_time, int admin);
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static void apply_kline(struct Client *source_p, struct ConfItem *aconf,
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const char *reason, const char *oper_reason, const char *current_date,
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int perm);
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static void apply_tkline(struct Client *source_p, struct ConfItem *aconf, const char *,
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const char *, const char *, int);
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static int already_placed_kline(struct Client *, const char *, const char *, int);
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static int remove_temp_kline(struct Client *, const char *, const char *);
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static void remove_perm_kline(struct Client *, const char *, const char *);
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/* mo_kline()
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*
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* parv[1] - temp time or user@host
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* parv[2] - user@host, "ON", or reason
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* parv[3] - "ON", reason, or server to target
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* parv[4] - server to target, or reason
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* parv[5] - reason
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*/
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static int
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mo_kline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
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{
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char def[] = "No Reason";
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char user[USERLEN + 2];
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char host[HOSTLEN + 2];
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char *reason = def;
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const char *target_server = NULL;
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int tkline_time = 0;
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int loc = 1;
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if(!IsOperK(source_p))
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kline");
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return 0;
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}
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if((tkline_time = valid_temp_time(parv[loc])) >= 0)
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loc++;
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/* we just set tkline_time to -1! */
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else
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tkline_time = 0;
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if(find_user_host(source_p, parv[loc], user, host) == 0)
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return 0;
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loc++;
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if(parc >= loc + 2 && !irccmp(parv[loc], "ON"))
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{
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if(!IsOperRemoteBan(source_p))
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS),
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me.name, source_p->name, "remoteban");
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return 0;
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}
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target_server = parv[loc + 1];
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loc += 2;
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}
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if(parc <= loc || EmptyString(parv[loc]))
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{
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sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS),
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me.name, source_p->name, "KLINE");
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return 0;
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}
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reason = LOCAL_COPY(parv[loc]);
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if(target_server != NULL)
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{
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sendto_match_servs(source_p, target_server, CAP_ENCAP, NOCAPS,
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"ENCAP %s KLINE %d %s %s :%s",
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target_server, tkline_time, user, host, reason);
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/* If we are sending it somewhere that doesnt include us, stop */
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if(!match(target_server, me.name))
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return 0;
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}
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/* if we have cluster servers, send it to them.. */
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else if(rb_dlink_list_length(&cluster_conf_list) > 0)
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cluster_generic(source_p, "KLINE",
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(tkline_time > 0) ? SHARED_TKLINE : SHARED_PKLINE,
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"%lu %s %s :%s", tkline_time, user, host, reason);
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set_kline(source_p, user, host, parv[loc], tkline_time, 0);
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return 0;
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}
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static int
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me_kline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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int tkline_time;
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/* <tkline_time> <user> <host> :<reason> */
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if(!IsClient(source_p))
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return 0;
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tkline_time = atoi(parv[1]);
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if(!find_shared_conf(source_p->username, source_p->host,
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source_p->servptr->name,
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(tkline_time > 0) ? SHARED_TKLINE : SHARED_PKLINE))
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return 0;
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set_kline(source_p, parv[2], parv[3], parv[4], tkline_time, 0);
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return 0;
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}
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/* mo_adminkline()
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*
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* parv[1] - user@host
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* parv[2] - reason
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*/
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static int
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mo_adminkline(struct Client *client_p, struct Client *source_p, int parc, const char **parv)
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{
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char user[USERLEN + 2];
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char host[HOSTLEN + 2];
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if(!IsOperK(source_p))
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "kline");
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return 0;
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}
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if(!IsOperAdmin(source_p))
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "admin");
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return 0;
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}
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if(find_user_host(source_p, parv[1], user, host) == 0)
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return 0;
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set_kline(source_p, user, host, parv[2], 0, 1);
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return 0;
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}
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/* mo_unkline()
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*
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* parv[1] - kline to remove
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* parv[2] - optional "ON"
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* parv[3] - optional target server
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*/
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static int
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mo_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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const char *user;
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char *host;
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char splat[] = "*";
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char *h = LOCAL_COPY(parv[1]);
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if(!IsOperUnkline(source_p))
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS), me.name, source_p->name, "unkline");
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return 0;
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}
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if((host = strchr(h, '@')) || *h == '*' || strchr(h, '.') || strchr(h, ':'))
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{
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/* Explicit user@host mask given */
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if(host) /* Found user@host */
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{
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*host++ = '\0';
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/* check for @host */
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if(*h)
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user = h;
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else
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user = splat;
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/* check for user@ */
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if(!*host)
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host = splat;
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}
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else
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{
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user = splat; /* no @ found, assume its *@somehost */
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host = h;
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}
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}
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else
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{
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sendto_one_notice(source_p, ":Invalid parameters");
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return 0;
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}
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/* possible remote kline.. */
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if((parc > 3) && (irccmp(parv[2], "ON") == 0))
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{
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if(!IsOperRemoteBan(source_p))
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{
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sendto_one(source_p, form_str(ERR_NOPRIVS),
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me.name, source_p->name, "remoteban");
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return 0;
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}
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sendto_match_servs(source_p, parv[3], CAP_ENCAP, NOCAPS,
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"ENCAP %s UNKLINE %s %s", parv[3], user, host);
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if(match(parv[3], me.name) == 0)
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return 0;
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}
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else if(rb_dlink_list_length(&cluster_conf_list) > 0)
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cluster_generic(source_p, "UNKLINE", SHARED_UNKLINE, "%s %s", user, host);
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if(remove_temp_kline(source_p, user, host))
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return 0;
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remove_perm_kline(source_p, user, host);
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return 0;
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}
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static int
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me_unkline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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const char *user, *host;
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/* user host */
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if(!IsClient(source_p))
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return 0;
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user = parv[1];
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host = parv[2];
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if(!find_shared_conf(source_p->username, source_p->host,
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source_p->servptr->name, SHARED_UNKLINE))
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return 0;
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if(remove_temp_kline(source_p, user, host))
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return 0;
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remove_perm_kline(source_p, user, host);
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return 0;
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}
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static void
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set_kline(struct Client *source_p, const char *user, const char *host, const char *lreason,
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int tkline_time, int admin)
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{
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char buffer[IRCD_BUFSIZE];
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struct ConfItem *aconf;
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const char *current_date;
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char *reason;
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char *oper_reason;
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reason = LOCAL_COPY_N(lreason, REASONLEN);
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if(!valid_user_host(source_p, user, host) || !valid_wild_card(source_p, user, host))
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return;
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if(already_placed_kline(source_p, user, host, tkline_time))
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return;
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rb_set_time();
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current_date = smalldate(rb_current_time());
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aconf = make_conf();
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aconf->status = CONF_KILL;
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aconf->user = rb_strdup(user);
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aconf->host = rb_strdup(host);
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/* Look for an oper reason */
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if((oper_reason = strchr(reason, '|')) != NULL)
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{
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*oper_reason = '\0';
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oper_reason++;
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if(!EmptyString(oper_reason))
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aconf->spasswd = rb_strdup(oper_reason);
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}
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if(tkline_time > 0)
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{
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rb_snprintf(buffer, sizeof(buffer),
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"Temporary K-line %d min. - %s (%s)",
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(int)(tkline_time / 60), reason, current_date);
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aconf->passwd = rb_strdup(buffer);
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apply_tkline(source_p, aconf, reason, oper_reason, current_date, tkline_time);
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}
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else
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{
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rb_snprintf(buffer, sizeof(buffer), "%s (%s)", reason, current_date);
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aconf->passwd = rb_strdup(buffer);
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apply_kline(source_p, aconf, reason, oper_reason, current_date, admin);
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}
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if(ConfigFileEntry.kline_delay)
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{
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if(kline_queued == 0)
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{
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rb_event_addonce("check_klines", check_klines_event, NULL,
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ConfigFileEntry.kline_delay);
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kline_queued = 1;
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}
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}
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else
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check_klines();
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}
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/* apply_kline()
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*
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* inputs -
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* output - NONE
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* side effects - kline as given, is added to the hashtable
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* and conf file
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*/
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static void
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apply_kline(struct Client *source_p, struct ConfItem *aconf,
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const char *reason, const char *oper_reason, const char *current_date, int locked)
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{
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const char *oper = get_oper_name(source_p);
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aconf->info.oper = operhash_add(oper);
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aconf->hold = rb_current_time();
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if(locked)
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aconf->flags |= CONF_FLAGS_LOCKED;
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sendto_realops_flags(UMODE_ALL, L_ALL,
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"%s added K-Line for [%s@%s] [%s]",
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aconf->info.oper, aconf->user, aconf->host, make_ban_reason(reason,
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oper_reason));
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ilog(L_KLINE, "K %s 0 %s %s %s", aconf->info.oper, aconf->user, aconf->host,
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make_ban_reason(reason, oper_reason));
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sendto_one_notice(source_p, ":Added %s [%s@%s]",
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locked ? "Locked K-Line" : "K-Line", aconf->user, aconf->host);
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add_conf_by_address(aconf->host, CONF_KILL, aconf->user, aconf);
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bandb_add(BANDB_KLINE, source_p, aconf->user, aconf->host,
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reason, EmptyString(oper_reason) ? NULL : oper_reason, locked);
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}
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/* apply_tkline()
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*
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* inputs -
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* output - NONE
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* side effects - tkline as given is placed
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*/
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static void
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apply_tkline(struct Client *source_p, struct ConfItem *aconf,
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const char *reason, const char *oper_reason, const char *current_date, int tkline_time)
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{
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const char *oper = get_oper_name(source_p);
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aconf->info.oper = operhash_add(oper);
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aconf->hold = rb_current_time() + tkline_time;
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add_temp_kline(aconf);
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sendto_realops_flags(UMODE_ALL, L_ALL,
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"%s added temporary %d min. K-Line for [%s@%s] [%s]",
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aconf->info.oper, tkline_time / 60,
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aconf->user, aconf->host, make_ban_reason(reason, oper_reason));
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ilog(L_KLINE, "K %s %d %s %s %s",
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aconf->info.oper, tkline_time / 60, aconf->user, aconf->host,
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make_ban_reason(reason, oper_reason));
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sendto_one_notice(source_p, ":Added temporary %d min. K-Line [%s@%s]",
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tkline_time / 60, aconf->user, aconf->host);
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}
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static inline int
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is_ip_number(const char *number)
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{
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if(strlen(number) > 3)
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return 0;
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while(*number)
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{
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if(!IsDigit(*number++))
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return 0;
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}
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return 1;
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}
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static const char *
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mangle_wildcard_to_cidr(const char *text)
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{
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static char buf[20];
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static const char *splat = "*", *dot = ".";
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char *p, *q, *n1, *n2, *n3, *n4;
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q = LOCAL_COPY(text);
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n1 = rb_strtok_r(q, dot, &p);
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n2 = rb_strtok_r(NULL, dot, &p);
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n3 = rb_strtok_r(NULL, dot, &p);
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n4 = rb_strtok_r(NULL, dot, &p);
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if(n1 == NULL)
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return NULL;
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/* ain't gonna touch this with a ten foot pole.. */
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if(!strcmp(n1, splat) || !is_ip_number(n1))
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return NULL;
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if(n2 == NULL || !strcmp(n2, splat))
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{
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if(n3 == NULL || (!strcmp(n3, splat) && (n4 == NULL || !strcmp(n4, splat))))
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{
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rb_snprintf(buf, sizeof(buf), "%s.0.0.0/8", n1);
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return buf;
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}
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}
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if(!is_ip_number(n2))
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return NULL;
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if(n3 == NULL || !strcmp(n3, splat))
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{
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if(n4 == NULL || !strcmp(n4, splat))
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{
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rb_snprintf(buf, sizeof(buf), "%s.%s.0.0/16", n1, n2);
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return buf;
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}
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}
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if(!is_ip_number(n3))
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return NULL;
|
|
|
|
if(n4 == NULL || !strcmp(n4, splat))
|
|
{
|
|
rb_snprintf(buf, sizeof(buf), "%s.%s.%s.0/24", n1, n2, n3);
|
|
return buf;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* find_user_host()
|
|
*
|
|
* inputs - client placing kline, user@host, user buffer, host buffer
|
|
* output - 0 if not ok to kline, 1 to kline i.e. if valid user host
|
|
* side effects -
|
|
*/
|
|
static int
|
|
find_user_host(struct Client *source_p, const char *userhost, char *luser, char *lhost)
|
|
{
|
|
char *hostp;
|
|
const char *ptr;
|
|
|
|
hostp = strchr(userhost, '@');
|
|
|
|
if(hostp != NULL) /* I'm a little user@host */
|
|
{
|
|
*(hostp++) = '\0'; /* short and squat */
|
|
if(*userhost)
|
|
rb_strlcpy(luser, userhost, USERLEN + 1); /* here is my user */
|
|
else
|
|
strcpy(luser, "*");
|
|
if(*hostp)
|
|
{
|
|
ptr = mangle_wildcard_to_cidr(hostp);
|
|
if(ptr == NULL)
|
|
ptr = hostp;
|
|
rb_strlcpy(lhost, ptr, HOSTLEN + 1); /* here is my host */
|
|
}
|
|
else
|
|
strcpy(lhost, "*");
|
|
}
|
|
else
|
|
{
|
|
/* no '@', no '.', so its not a user@host or host, therefore
|
|
* its a nick, which support was removed for.
|
|
*/
|
|
if(strchr(userhost, '.') == NULL && strchr(userhost, ':') == NULL)
|
|
{
|
|
sendto_one_notice(source_p, ":K-Line must be a user@host or host");
|
|
return 0;
|
|
}
|
|
|
|
luser[0] = '*'; /* no @ found, assume its *@somehost */
|
|
luser[1] = '\0';
|
|
ptr = mangle_wildcard_to_cidr(userhost);
|
|
|
|
if(ptr == NULL)
|
|
ptr = userhost;
|
|
|
|
rb_strlcpy(lhost, ptr, HOSTLEN + 1);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* valid_user_host()
|
|
*
|
|
* inputs - user buffer, host buffer
|
|
* output - 0 if invalid, 1 if valid
|
|
* side effects -
|
|
*/
|
|
static int
|
|
valid_user_host(struct Client *source_p, const char *luser, const char *lhost)
|
|
{
|
|
const char *p;
|
|
|
|
for(p = luser; *p; p++)
|
|
{
|
|
if(!IsUserChar(*p) && !IsKWildChar(*p))
|
|
{
|
|
sendto_one_notice(source_p, ":Invalid K-Line");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
for(p = lhost; *p; p++)
|
|
{
|
|
if(!IsHostChar(*p) && !IsKWildChar(*p))
|
|
{
|
|
sendto_one_notice(source_p, ":Invalid K-Line");
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
|
|
/* valid_wild_card()
|
|
*
|
|
* input - user buffer, host buffer
|
|
* output - 0 if invalid, 1 if valid
|
|
* side effects -
|
|
*/
|
|
static int
|
|
valid_wild_card(struct Client *source_p, const char *luser, const char *lhost)
|
|
{
|
|
const char *p;
|
|
char tmpch;
|
|
int nonwild = 0;
|
|
|
|
/* check there are enough non wildcard chars */
|
|
p = luser;
|
|
while((tmpch = *p++))
|
|
{
|
|
if(!IsKWildChar(tmpch))
|
|
{
|
|
/* found enough chars, return */
|
|
if(++nonwild >= ConfigFileEntry.min_nonwildcard)
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
/* try host, as user didnt contain enough */
|
|
p = lhost;
|
|
while((tmpch = *p++))
|
|
{
|
|
if(!IsKWildChar(tmpch))
|
|
if(++nonwild >= ConfigFileEntry.min_nonwildcard)
|
|
return 1;
|
|
}
|
|
|
|
sendto_one_notice(source_p,
|
|
":Please include at least %d non-wildcard "
|
|
"characters with the user@host", ConfigFileEntry.min_nonwildcard);
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* already_placed_kline()
|
|
*
|
|
* inputs - source to notify, user@host to check, tkline time
|
|
* outputs - 1 if a perm kline or a tkline when a tkline is being
|
|
* set exists, else 0
|
|
* side effects - notifies source_p kline exists
|
|
*/
|
|
/* Note: This currently works if the new K-line is a special case of an
|
|
* existing K-line, but not the other way round. To do that we would
|
|
* have to walk the hash and check every existing K-line. -A1kmm.
|
|
*/
|
|
static int
|
|
already_placed_kline(struct Client *source_p, const char *luser, const char *lhost, int tkline)
|
|
{
|
|
const char *reason;
|
|
struct rb_sockaddr_storage iphost, *piphost;
|
|
struct ConfItem *aconf;
|
|
int t;
|
|
if(ConfigFileEntry.non_redundant_klines)
|
|
{
|
|
if((t = parse_netmask(lhost, (struct sockaddr *)&iphost, NULL)) != HM_HOST)
|
|
{
|
|
#ifdef RB_IPV6
|
|
if(t == HM_IPV6)
|
|
t = AF_INET6;
|
|
else
|
|
#endif
|
|
t = AF_INET;
|
|
|
|
piphost = &iphost;
|
|
}
|
|
else
|
|
piphost = NULL;
|
|
|
|
if((aconf =
|
|
find_conf_by_address(lhost, NULL, (struct sockaddr *)piphost, CONF_KILL, t,
|
|
luser)))
|
|
{
|
|
/* setting a tkline, or existing one is perm */
|
|
/* there is a possibility the hash will return a
|
|
* temporary kline, when a permanent one also
|
|
* exists. It isn't worth fixing, so disable below --anfl
|
|
*/
|
|
/*if(tkline || ((aconf->flags & CONF_FLAGS_TEMPORARY) == 0)) */
|
|
{
|
|
reason = aconf->passwd ? aconf->passwd : "<No Reason>";
|
|
|
|
sendto_one_notice(source_p,
|
|
":[%s@%s] already K-Lined by [%s@%s] - %s",
|
|
luser, lhost, aconf->user, aconf->host, reason);
|
|
return 1;
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
remove_perm_kline(struct Client *source_p, const char *user, const char *host)
|
|
{
|
|
struct AddressRec *arec;
|
|
struct ConfItem *aconf;
|
|
int i;
|
|
|
|
/* dont need to be safe, as we're quitting once we've done anything */
|
|
HOSTHASH_WALK(i, arec)
|
|
{
|
|
if((arec->type & ~CONF_SKIPUSER) == CONF_KILL)
|
|
{
|
|
aconf = arec->aconf;
|
|
|
|
if(aconf->flags & CONF_FLAGS_TEMPORARY)
|
|
continue;
|
|
|
|
if((aconf->user && irccmp(user, aconf->user)) || irccmp(host, aconf->host))
|
|
continue;
|
|
|
|
if(IsConfLocked(aconf) && !IsOperAdmin(source_p))
|
|
{
|
|
sendto_one_notice(source_p, ":Cannot remove locked K-Line %s@%s",
|
|
user, host);
|
|
return;
|
|
}
|
|
|
|
bandb_del(BANDB_KLINE, aconf->user, aconf->host);
|
|
delete_one_address_conf(host, aconf);
|
|
|
|
|
|
sendto_one_notice(source_p, ":K-Line for [%s@%s] is removed", user, host);
|
|
sendto_realops_flags(UMODE_ALL, L_ALL,
|
|
"%s has removed the K-Line for: [%s@%s]",
|
|
get_oper_name(source_p), user, host);
|
|
ilog(L_KLINE, "UK %s %s %s", get_oper_name(source_p), user, host);
|
|
return;
|
|
}
|
|
|
|
}
|
|
HOSTHASH_WALK_END;
|
|
sendto_one_notice(source_p, ":No K-Line for %s@%s", user, host);
|
|
}
|
|
|
|
/* remove_temp_kline()
|
|
*
|
|
* inputs - username, hostname to unkline
|
|
* outputs -
|
|
* side effects - tries to unkline anything that matches
|
|
*/
|
|
static int
|
|
remove_temp_kline(struct Client *source_p, const char *user, const char *host)
|
|
{
|
|
struct ConfItem *aconf;
|
|
rb_dlink_node *ptr;
|
|
int i;
|
|
|
|
for(i = 0; i < LAST_TEMP_TYPE; i++)
|
|
{
|
|
RB_DLINK_FOREACH(ptr, temp_klines[i].head)
|
|
{
|
|
aconf = ptr->data;
|
|
|
|
if(aconf->user && irccmp(user, aconf->user))
|
|
continue;
|
|
|
|
if(irccmp(aconf->host, host))
|
|
continue;
|
|
|
|
rb_dlinkDestroy(ptr, &temp_klines[i]);
|
|
delete_one_address_conf(aconf->host, aconf);
|
|
|
|
sendto_one_notice(source_p,
|
|
":Un-klined [%s@%s] from temporary k-lines", user, host);
|
|
sendto_realops_flags(UMODE_ALL, L_ALL,
|
|
"%s has removed the temporary K-Line for: [%s@%s]",
|
|
get_oper_name(source_p), user, host);
|
|
ilog(L_KLINE, "UK %s %s %s", get_oper_name(source_p), user, host);
|
|
|
|
return YES;
|
|
}
|
|
}
|
|
|
|
return NO;
|
|
}
|