3c7d6fcce7
Also fix up some return values and stuff to use bool (or void if nothing). I just did it whilst I was here. According to jilles, the return value used to signify whether or not the client had exited. This was error-prone and was fixed a long, long time ago, but the return value was left int for historical reasons. Since the return type is not used (and has no clear use case anyway), it's safe to just get rid of it.
423 lines
11 KiB
C
423 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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#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 "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 "logger.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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#include "bandbi.h"
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#include "operhash.h"
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static const char dline_desc[] = "Provides the DLINE facility to ban users via IP address";
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static void mo_dline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void me_dline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void mo_undline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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static void me_undline(struct MsgBuf *, struct Client *, struct Client *, int, const char **);
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struct Message dline_msgtab = {
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"DLINE", 0, 0, 0, 0,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_dline, 4}, {mo_dline, 2}}
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};
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struct Message undline_msgtab = {
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"UNDLINE", 0, 0, 0, 0,
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{mg_unreg, mg_not_oper, mg_ignore, mg_ignore, {me_undline, 2}, {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_AV2(dline, NULL, NULL, dline_clist, NULL, NULL, NULL, NULL, dline_desc);
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static bool remove_temp_dline(struct ConfItem *);
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static void apply_dline(struct Client *, const char *, int, char *);
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static void apply_undline(struct Client *, const char *);
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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 void
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mo_dline(struct MsgBuf *msgbuf_p, 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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const char *dlhost;
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char *reason = def;
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char cidr_form_host[HOSTLEN + 1];
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int tdline_time = 0;
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const char *target_server = NULL;
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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;
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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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dlhost = parv[loc];
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rb_strlcpy(cidr_form_host, dlhost, sizeof(cidr_form_host));
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loc++;
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/* would break the protocol */
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if (*dlhost == ':')
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{
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sendto_one_notice(source_p, ":Invalid D-Line");
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return;
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}
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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;
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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 + 1 && !EmptyString(parv[loc]))
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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,
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CAP_ENCAP, NOCAPS,
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"ENCAP %s DLINE %d %s :%s",
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target_server, tdline_time, dlhost, reason);
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if(!match(target_server, me.name))
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return;
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}
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apply_dline(source_p, dlhost, tdline_time, reason);
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check_dlines();
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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 void
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mo_undline(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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const char *cidr;
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const char *target_server = NULL;
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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, "unkline");
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return;
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}
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cidr = parv[1];
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if(parc >= 4 && !irccmp(parv[2], "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;
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}
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target_server = parv[3];
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sendto_match_servs(source_p, target_server,
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CAP_ENCAP, NOCAPS, "ENCAP %s UNDLINE %s", target_server, cidr);
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if(!match(target_server, me.name))
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return;
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}
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apply_undline(source_p, cidr);
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}
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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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{
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int tdline_time = atoi(parv[1]);
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/* Since this is coming over a server link, assume that the originating
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* server did the relevant permission/sanity checks...
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*/
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if(!IsPerson(source_p))
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return;
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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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tdline_time > 0 ? SHARED_TDLINE : SHARED_PDLINE))
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return;
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apply_dline(source_p, parv[2], tdline_time, LOCAL_COPY(parv[3]));
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check_dlines();
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}
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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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{
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if(!IsPerson(source_p))
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return;
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if(!find_shared_conf(source_p->username, source_p->host,
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source_p->servptr->name, SHARED_UNDLINE))
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return;
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apply_undline(source_p, parv[1]);
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}
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static void
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apply_dline(struct Client *source_p, const char *dlhost, int tdline_time, char *reason)
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{
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struct ConfItem *aconf;
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char *oper_reason;
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struct rb_sockaddr_storage daddr;
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int t = AF_INET, ty, b;
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const char *creason;
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ty = parse_netmask(dlhost, &daddr, &b);
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if(ty == HM_HOST)
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{
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sendto_one(source_p, ":%s NOTICE %s :Invalid D-Line", me.name, source_p->name);
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return;
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}
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#ifdef RB_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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/* This means dlines wider than /16 cannot be set remotely */
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if(IsOperAdmin(source_p))
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{
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if(b < 8)
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{
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sendto_one_notice(source_p,
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":For safety, bitmasks less than 8 require conf access.");
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return;
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}
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}
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else
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{
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if(b < 16)
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{
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sendto_one_notice(source_p,
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":Dline bitmasks less than 16 are for admins only.");
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return;
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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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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, source_p->name, dlhost, aconf->host,
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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, source_p->name, dlhost, aconf->host,
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creason);
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return;
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}
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}
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}
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rb_set_time();
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aconf = make_conf();
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aconf->status = CONF_DLINE;
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aconf->created = rb_current_time();
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aconf->host = rb_strdup(dlhost);
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aconf->passwd = rb_strdup(reason);
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aconf->info.oper = operhash_add(get_oper_name(source_p));
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if(strlen(reason) > BANREASONLEN)
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reason[BANREASONLEN] = '\0';
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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(tdline_time > 0)
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{
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aconf->hold = rb_current_time() + 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, 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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add_conf_by_address(aconf->host, CONF_DLINE, NULL, NULL, aconf);
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bandb_add(BANDB_DLINE, source_p, aconf->host, NULL,
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reason, EmptyString(aconf->spasswd) ? NULL : aconf->spasswd, 0);
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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 D-Line for [%s] [%s]",
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get_oper_name(source_p), aconf->host, reason);
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ilog(L_KLINE, "D %s 0 %s %s",
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get_oper_name(source_p), 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 D-Line for [%s] [%s|%s]",
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get_oper_name(source_p), aconf->host, reason, oper_reason);
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ilog(L_KLINE, "D %s 0 %s %s|%s",
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get_oper_name(source_p),
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aconf->host, reason, oper_reason);
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}
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}
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}
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static void
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apply_undline(struct Client *source_p, const char *cidr)
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{
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char buf[BUFSIZE];
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struct ConfItem *aconf;
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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;
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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;
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}
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rb_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, source_p->name, 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;
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}
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bandb_del(BANDB_DLINE, aconf->host, NULL);
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sendto_one(source_p, ":%s NOTICE %s :D-Line for [%s] is removed", me.name, source_p->name,
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aconf->host);
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sendto_realops_snomask(SNO_GENERAL, L_ALL, "%s has removed the D-Line for: [%s]",
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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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}
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/* remove_temp_dline()
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*
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* inputs - confitem to undline
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* outputs - true if removed, false otherwise.
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* side effects - tries to undline anything that matches
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*/
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static bool
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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 true;
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}
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}
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}
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return false;
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}
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