470 lines
11 KiB
C
470 lines
11 KiB
C
/*
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* ircd-ratbox: A slightly useful ircd.
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* m_dline.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) 2002-2005 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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* USA
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*
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* $Id: m_dline.c 3225 2007-03-04 23:42:55Z jilles $
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*/
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#include "stdinc.h"
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#include "channel.h"
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#include "class.h"
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#include "client.h"
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#include "common.h"
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#include "irc_string.h"
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#include "sprintf_irc.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 "hash.h"
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#include "s_serv.h"
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#include "msg.h"
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#include "parse.h"
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#include "modules.h"
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static int mo_dline(struct Client *, struct Client *, int, const char **);
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static int mo_undline(struct Client *, struct Client *, int, const char **);
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struct Message dline_msgtab = {
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"DLINE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_dline, 2}}
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};
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struct Message undline_msgtab = {
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"UNDLINE", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_undline, 2}}
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};
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mapi_clist_av1 dline_clist[] = { &dline_msgtab, &undline_msgtab, NULL };
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DECLARE_MODULE_AV1(dline, NULL, NULL, dline_clist, NULL, NULL, "$Revision: 3225 $");
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static int valid_comment(char *comment);
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static int flush_write(struct Client *, FILE *, char *, char *);
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static int remove_temp_dline(struct ConfItem *);
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/* mo_dline()
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*
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* parv[1] - dline to add
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* parv[2] - reason
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*/
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static int
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mo_dline(struct Client *client_p, struct Client *source_p,
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int parc, const char *parv[])
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{
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char def[] = "No Reason";
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const char *dlhost;
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char *oper_reason;
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char *reason = def;
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struct irc_sockaddr_storage daddr;
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char cidr_form_host[HOSTLEN + 1];
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struct ConfItem *aconf;
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int bits;
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char dlbuffer[IRCD_BUFSIZE];
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const char *current_date;
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int tdline_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),
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me.name, source_p->name, "kline");
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return 0;
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}
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if((tdline_time = valid_temp_time(parv[loc])) >= 0)
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loc++;
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if(parc < loc + 1)
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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, "DLINE");
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return 0;
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}
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dlhost = parv[loc];
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strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host));
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if(!parse_netmask(dlhost, NULL, &bits))
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{
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sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line",
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me.name, source_p->name);
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return 0;
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}
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loc++;
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if(parc >= loc + 1) /* host :reason */
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{
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if(!EmptyString(parv[loc]))
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reason = LOCAL_COPY(parv[loc]);
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if(!valid_comment(reason))
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{
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sendto_one(source_p,
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":%s NOTICE %s :Invalid character '\"' in comment",
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me.name, source_p->name);
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return 0;
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}
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}
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if(IsOperAdmin(source_p))
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{
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if(bits < 8)
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{
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sendto_one(source_p,
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":%s NOTICE %s :For safety, bitmasks less than 8 require conf access.",
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me.name, parv[0]);
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return 0;
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}
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}
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else
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{
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if(bits < 16)
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{
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sendto_one(source_p,
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":%s NOTICE %s :Dline bitmasks less than 16 are for admins only.",
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me.name, parv[0]);
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return 0;
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}
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}
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if(ConfigFileEntry.non_redundant_klines)
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{
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const char *creason;
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int t = AF_INET, ty, b;
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ty = parse_netmask(dlhost, (struct sockaddr *)&daddr, &b);
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#ifdef IPV6
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if(ty == HM_IPV6)
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t = AF_INET6;
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else
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#endif
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t = AF_INET;
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if((aconf = find_dline((struct sockaddr *)&daddr, t)) != NULL)
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{
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int bx;
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parse_netmask(aconf->host, NULL, &bx);
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if(b >= bx)
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{
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creason = aconf->passwd ? aconf->passwd : "<No Reason>";
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if(IsConfExemptKline(aconf))
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sendto_one(source_p,
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":%s NOTICE %s :[%s] is (E)d-lined by [%s] - %s",
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me.name, parv[0], dlhost, aconf->host, creason);
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else
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sendto_one(source_p,
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":%s NOTICE %s :[%s] already D-lined by [%s] - %s",
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me.name, parv[0], dlhost, aconf->host, creason);
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return 0;
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}
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}
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}
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set_time();
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current_date = smalldate();
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aconf = make_conf();
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aconf->status = CONF_DLINE;
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DupString(aconf->host, dlhost);
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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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DupString(aconf->spasswd, oper_reason);
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}
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if(tdline_time > 0)
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{
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rb_snprintf(dlbuffer, sizeof(dlbuffer),
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"Temporary D-line %d min. - %s (%s)",
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(int) (tdline_time / 60), reason, current_date);
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DupString(aconf->passwd, dlbuffer);
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aconf->hold = CurrentTime + tdline_time;
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add_temp_dline(aconf);
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if(EmptyString(oper_reason))
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{
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"%s added temporary %d min. D-Line for [%s] [%s]",
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get_oper_name(source_p), tdline_time / 60,
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aconf->host, reason);
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ilog(L_KLINE, "D %s %d %s %s",
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get_oper_name(source_p), tdline_time / 60,
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aconf->host, reason);
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}
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else
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{
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"%s added temporary %d min. D-Line for [%s] [%s|%s]",
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get_oper_name(source_p), tdline_time / 60,
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aconf->host, reason, oper_reason);
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ilog(L_KLINE, "D %s %d %s %s|%s",
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get_oper_name(source_p), tdline_time / 60,
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aconf->host, reason, oper_reason);
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}
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sendto_one(source_p, ":%s NOTICE %s :Added temporary %d min. D-Line for [%s]",
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me.name, source_p->name, tdline_time / 60, aconf->host);
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}
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else
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{
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rb_snprintf(dlbuffer, sizeof(dlbuffer), "%s (%s)", reason, current_date);
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DupString(aconf->passwd, dlbuffer);
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add_conf_by_address(aconf->host, CONF_DLINE, NULL, aconf);
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write_confitem(DLINE_TYPE, source_p, NULL, aconf->host, reason,
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oper_reason, current_date, 0);
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}
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check_dlines();
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return 0;
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}
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/* mo_undline()
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*
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* parv[1] = dline to remove
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*/
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static int
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mo_undline(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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FILE *in;
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FILE *out;
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char buf[BUFSIZE], buff[BUFSIZE], temppath[BUFSIZE], *p;
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const char *filename, *found_cidr;
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const char *cidr;
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struct ConfItem *aconf;
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int pairme = NO, error_on_write = NO;
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mode_t oldumask;
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rb_snprintf(temppath, sizeof(temppath), "%s.tmp", ConfigFileEntry.dlinefile);
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if(!IsOperUnkline(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, "unkline");
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return 0;
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}
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cidr = parv[1];
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if(parse_netmask(cidr, NULL, NULL) == HM_HOST)
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{
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sendto_one_notice(source_p, ":Invalid D-Line");
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return 0;
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}
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aconf = find_exact_conf_by_address(cidr, CONF_DLINE, NULL);
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if(aconf == NULL)
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{
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sendto_one_notice(source_p, ":No D-Line for %s", cidr);
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return 0;
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}
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strlcpy(buf, aconf->host, sizeof buf);
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if(remove_temp_dline(aconf))
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{
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sendto_one(source_p,
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":%s NOTICE %s :Un-dlined [%s] from temporary D-lines",
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me.name, parv[0], buf);
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"%s has removed the temporary D-Line for: [%s]",
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get_oper_name(source_p), buf);
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ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), buf);
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return 0;
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}
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filename = get_conf_name(DLINE_TYPE);
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if((in = fopen(filename, "r")) == 0)
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{
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sendto_one(source_p, ":%s NOTICE %s :Cannot open %s", me.name, parv[0], filename);
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return 0;
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}
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oldumask = umask(0);
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if((out = fopen(temppath, "w")) == 0)
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{
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sendto_one(source_p, ":%s NOTICE %s :Cannot open %s", me.name, parv[0], temppath);
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fclose(in);
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umask(oldumask);
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return 0;
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}
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umask(oldumask);
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while (fgets(buf, sizeof(buf), in))
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{
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strlcpy(buff, buf, sizeof(buff));
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if((p = strchr(buff, '\n')) != NULL)
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*p = '\0';
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if((*buff == '\0') || (*buff == '#'))
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{
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if(!error_on_write)
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flush_write(source_p, out, buf, temppath);
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continue;
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}
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if((found_cidr = getfield(buff)) == NULL)
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{
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if(!error_on_write)
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flush_write(source_p, out, buf, temppath);
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continue;
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}
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if(irccmp(found_cidr, aconf->host) == 0)
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{
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pairme++;
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}
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else
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{
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if(!error_on_write)
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flush_write(source_p, out, buf, temppath);
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continue;
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}
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}
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fclose(in);
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if (fclose(out))
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error_on_write = YES;
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if(error_on_write)
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{
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sendto_one(source_p,
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":%s NOTICE %s :Couldn't write D-line file, aborted",
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me.name, parv[0]);
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return 0;
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}
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else if(!pairme)
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{
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sendto_one_notice(source_p, ":Cannot find D-Line for %s in file",
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aconf->host);
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if(temppath != NULL)
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(void) unlink(temppath);
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return 0;
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}
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if (rename(temppath, filename))
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{
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sendto_one_notice(source_p, ":Couldn't rename temp file, aborted");
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return 0;
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}
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sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, parv[0], aconf->host);
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"%s has removed the D-Line for: [%s]", get_oper_name(source_p), aconf->host);
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ilog(L_KLINE, "UD %s %s", get_oper_name(source_p), aconf->host);
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delete_one_address_conf(aconf->host, aconf);
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return 0;
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}
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/*
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* valid_comment
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* inputs - pointer to client
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* - pointer to comment
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* output - 0 if no valid comment, 1 if valid
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* side effects - NONE
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*/
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static int
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valid_comment(char *comment)
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{
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if(strchr(comment, '"'))
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return 0;
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if(strlen(comment) > BANREASONLEN)
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comment[BANREASONLEN] = '\0';
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return 1;
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}
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/*
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* flush_write()
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*
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* inputs - pointer to client structure of oper requesting unkline
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* - out is the file descriptor
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* - buf is the buffer to write
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* - ntowrite is the expected number of character to be written
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* - temppath is the temporary file name to be written
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* output - YES for error on write
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* - NO for success
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* side effects - if successful, the buf is written to output file
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* if a write failure happesn, and the file pointed to
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* by temppath, if its non NULL, is removed.
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*
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* The idea here is, to be as robust as possible when writing to the
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* kline file.
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*
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* -Dianora
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*/
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static int
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flush_write(struct Client *source_p, FILE * out, char *buf, char *temppath)
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{
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int error_on_write = (fputs(buf, out) < 0) ? YES : NO;
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if(error_on_write)
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{
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sendto_one_notice(source_p, ":Unable to write to %s", temppath);
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fclose(out);
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if(temppath != NULL)
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(void) unlink(temppath);
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}
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return (error_on_write);
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}
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/* remove_temp_dline()
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*
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* inputs - confitem to undline
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* outputs -
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* side effects - tries to undline anything that matches
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*/
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static int
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remove_temp_dline(struct ConfItem *aconf)
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{
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rb_dlink_node *ptr;
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int i;
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for (i = 0; i < LAST_TEMP_TYPE; i++)
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{
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RB_DLINK_FOREACH(ptr, temp_dlines[i].head)
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{
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if (aconf == ptr->data)
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{
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rb_dlinkDestroy(ptr, &temp_dlines[i]);
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delete_one_address_conf(aconf->host, aconf);
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return YES;
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}
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}
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}
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return NO;
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}
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