315 lines
12 KiB
C
315 lines
12 KiB
C
/*
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* charybdis: An advanced ircd.
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* m_ban.c: Propagates network bans across servers.
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*
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* Copyright (C) 2010 Jilles Tjoelker
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* 1.Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2.Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "stdinc.h"
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#include "send.h"
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#include "channel.h"
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#include "client.h"
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#include "common.h"
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#include "config.h"
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#include "ircd.h"
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#include "match.h"
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#include "s_conf.h"
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#include "s_newconf.h"
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#include "msg.h"
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#include "modules.h"
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#include "hash.h"
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#include "s_serv.h"
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#include "operhash.h"
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#include "reject.h"
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#include "hostmask.h"
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static int m_ban(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
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static int ms_ban(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]);
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struct Message ban_msgtab = {
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"BAN", 0, 0, 0, MFLG_SLOW,
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{mg_unreg, {m_ban, 0}, {ms_ban, 9}, {ms_ban, 9}, mg_ignore, {m_ban, 0}}
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};
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mapi_clist_av1 ban_clist[] = { &ban_msgtab, NULL };
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DECLARE_MODULE_AV1(ban, NULL, NULL, ban_clist, NULL, NULL, "$Revision: 1349 $");
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static int
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m_ban(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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sendto_one_notice(source_p, ":The BAN command is not user-accessible.");
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sendto_one_notice(source_p, ":To ban a user from a channel, see /QUOTE HELP CMODE");
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if (IsOper(source_p))
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sendto_one_notice(source_p, ":To ban a user from a server or from the network, see /QUOTE HELP KLINE");
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return 0;
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}
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/* ms_ban()
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*
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* parv[1] - type
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* parv[2] - username mask or *
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* parv[3] - hostname mask
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* parv[4] - creation TS
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* parv[5] - duration (relative to creation)
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* parv[6] - lifetime (relative to creation)
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* parv[7] - oper or *
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* parv[8] - reason (possibly with |operreason)
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*/
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static int
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ms_ban(struct Client *client_p, struct Client *source_p, int parc, const char *parv[])
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{
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rb_dlink_node *ptr;
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struct ConfItem *aconf;
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unsigned int ntype;
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const char *oper, *stype;
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time_t created, hold, lifetime;
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char *p;
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int act;
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int valid;
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if (strlen(parv[1]) != 1) {
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
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"Unknown BAN type %s from %s",
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parv[1], source_p->name);
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return 0;
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}
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switch (parv[1][0]) {
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case 'K':
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ntype = CONF_KILL;
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stype = "K-Line";
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break;
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case 'X':
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ntype = CONF_XLINE;
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stype = "X-Line";
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break;
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case 'R':
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ntype = IsChannelName(parv[3]) ? CONF_RESV_CHANNEL :
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CONF_RESV_NICK;
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stype = "RESV";
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break;
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default:
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sendto_realops_snomask(SNO_GENERAL, L_NETWIDE,
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"Unknown BAN type %s from %s",
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parv[1], source_p->name);
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return 0;
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}
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created = atol(parv[4]);
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hold = created + atoi(parv[5]);
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lifetime = created + atoi(parv[6]);
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if (!strcmp(parv[7], "*"))
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oper = IsServer(source_p) ? source_p->name : get_oper_name(source_p);
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else
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oper = parv[7];
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ptr = find_prop_ban(ntype, parv[2], parv[3]);
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if (ptr != NULL) {
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/* We already know about this ban mask. */
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aconf = ptr->data;
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if (aconf->created > created ||
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(aconf->created == created &&
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aconf->lifetime >= lifetime)) {
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if (IsPerson(source_p))
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sendto_one_notice(source_p,
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":Your %s [%s%s%s] has been superseded",
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stype,
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aconf->user ? aconf->user : "",
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aconf->user ? "@" : "",
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aconf->host);
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return 0;
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}
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/* act indicates if something happened (from the oper's
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* point of view). This is the case if the ban was
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* previously active (not deleted) or if the new ban
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* is not a removal and not already expired.
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*/
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act = !(aconf->status & CONF_ILLEGAL) || (hold != created &&
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hold > rb_current_time());
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if (lifetime > aconf->lifetime)
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aconf->lifetime = lifetime;
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/* already expired, hmm */
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if (aconf->lifetime <= rb_current_time())
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return 0;
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/* Deactivate, it will be reactivated later if appropriate. */
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deactivate_conf(aconf, ptr);
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rb_free(aconf->user);
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aconf->user = NULL;
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rb_free(aconf->host);
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aconf->host = NULL;
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operhash_delete(aconf->info.oper);
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aconf->info.oper = NULL;
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rb_free(aconf->passwd);
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aconf->passwd = NULL;
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rb_free(aconf->spasswd);
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aconf->spasswd = NULL;
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} else {
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/* New ban mask. */
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aconf = make_conf();
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aconf->status = CONF_ILLEGAL | ntype;
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aconf->lifetime = lifetime;
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rb_dlinkAddAlloc(aconf, &prop_bans);
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act = hold != created && hold > rb_current_time();
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}
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aconf->flags &= ~CONF_FLAGS_MYOPER;
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aconf->flags |= CONF_FLAGS_TEMPORARY;
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aconf->user = ntype == CONF_KILL ? rb_strdup(parv[2]) : NULL;
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aconf->host = rb_strdup(parv[3]);
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aconf->info.oper = operhash_add(oper);
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aconf->created = created;
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aconf->hold = hold;
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if (ntype != CONF_KILL || (p = strchr(parv[parc - 1], '|')) == NULL)
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aconf->passwd = rb_strdup(parv[parc - 1]);
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else {
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aconf->passwd = rb_strndup(parv[parc - 1], p - parv[parc - 1] + 1);
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aconf->spasswd = rb_strdup(p + 1);
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}
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/* The ban is fully filled in and in the prop_bans list
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* but still deactivated. Now determine if it should be activated
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* and send the server notices.
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*/
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/* We only reject *@* and the like here.
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* Otherwise malformed bans are fairly harmless and can be removed.
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*/
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switch (ntype) {
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case CONF_KILL:
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valid = valid_wild_card(aconf->user, aconf->host);
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break;
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case CONF_RESV_CHANNEL:
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valid = 1;
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break;
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default:
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valid = valid_wild_card_simple(aconf->host);
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break;
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}
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if (act && hold != created && !valid) {
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"Ignoring global %d min. %s from %s%s%s for [%s%s%s]: too few non-wildcard characters",
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(int)((hold - rb_current_time()) / 60),
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stype,
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IsServer(source_p) ? source_p->name : get_oper_name(source_p),
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strcmp(parv[7], "*") ? " on behalf of " : "",
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strcmp(parv[7], "*") ? parv[7] : "",
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aconf->user ? aconf->user : "",
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aconf->user ? "@" : "",
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aconf->host);
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if(IsPerson(source_p))
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sendto_one_notice(source_p,
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":Your %s [%s%s%s] has too few non-wildcard characters",
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stype,
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aconf->user ? aconf->user : "",
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aconf->user ? "@" : "",
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aconf->host);
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/* Propagate it, but do not apply it locally. */
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} else if (act && hold != created) {
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/* Keep the notices in sync with modules/m_kline.c etc. */
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"%s added global %d min. %s%s%s for [%s%s%s] [%s]",
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IsServer(source_p) ? source_p->name : get_oper_name(source_p),
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(int)((hold - rb_current_time()) / 60),
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stype,
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strcmp(parv[7], "*") ? " from " : "",
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strcmp(parv[7], "*") ? parv[7] : "",
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aconf->user ? aconf->user : "",
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aconf->user ? "@" : "",
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aconf->host,
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parv[parc - 1]);
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ilog(L_KLINE, "%s %s %d %s%s%s %s", parv[1],
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IsServer(source_p) ? source_p->name : get_oper_name(source_p),
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(int)((hold - rb_current_time()) / 60),
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aconf->user ? aconf->user : "",
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aconf->user ? " " : "",
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aconf->host,
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parv[parc - 1]);
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aconf->status &= ~CONF_ILLEGAL;
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} else if (act) {
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sendto_realops_snomask(SNO_GENERAL, L_ALL,
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"%s has removed the global %s for: [%s%s%s]%s%s",
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IsServer(source_p) ? source_p->name : get_oper_name(source_p),
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stype,
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aconf->user ? aconf->user : "",
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aconf->user ? "@" : "",
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aconf->host,
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strcmp(parv[7], "*") ? " on behalf of " : "",
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strcmp(parv[7], "*") ? parv[7] : "");
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ilog(L_KLINE, "U%s %s %s%s %s", parv[1],
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IsServer(source_p) ? source_p->name : get_oper_name(source_p),
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aconf->user ? aconf->user : "",
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aconf->user ? " " : "",
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aconf->host);
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}
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/* If CONF_ILLEGAL is still set at this point, remove entries from the
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* reject cache (for klines and xlines).
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* If CONF_ILLEGAL is not set, add the ban to the type-specific data
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* structure and take action on matched clients/channels.
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*/
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switch (ntype) {
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case CONF_KILL:
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if (aconf->status & CONF_ILLEGAL)
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remove_reject_mask(aconf->user, aconf->host);
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else {
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add_conf_by_address(aconf->host, CONF_KILL, aconf->user, NULL, aconf);
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if(ConfigFileEntry.kline_delay ||
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(IsServer(source_p) &&
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!HasSentEob(source_p))) {
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if(kline_queued == 0) {
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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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} else
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check_klines();
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}
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break;
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case CONF_XLINE:
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if (aconf->status & CONF_ILLEGAL)
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remove_reject_mask(aconf->host, NULL);
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else {
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rb_dlinkAddAlloc(aconf, &xline_conf_list);
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check_xlines();
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}
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break;
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case CONF_RESV_CHANNEL:
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if (!(aconf->status & CONF_ILLEGAL)) {
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add_to_resv_hash(aconf->host, aconf);
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resv_chan_forcepart(aconf->host, aconf->passwd, hold - rb_current_time());
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}
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break;
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case CONF_RESV_NICK:
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if (!(aconf->status & CONF_ILLEGAL))
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rb_dlinkAddAlloc(aconf, &resv_conf_list);
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break;
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}
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sendto_server(client_p, NULL, CAP_BAN|CAP_TS6, NOCAPS,
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":%s BAN %s %s %s %s %s %s %s :%s",
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source_p->id,
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parv[1],
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parv[2],
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parv[3],
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parv[4],
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parv[5],
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parv[6],
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parv[7],
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parv[parc - 1]);
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return 0;
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}
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